Publisher: Oxford University Press   (Total: 413 journals)

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Showing 1 - 200 of 413 Journals sorted alphabetically
ACS Symposium Series     Full-text available via subscription   (Followers: 3, SJR: 0.189, CiteScore: 0)
Acta Biochimica et Biophysica Sinica     Hybrid Journal   (Followers: 5, SJR: 0.79, CiteScore: 2)
Adaptation     Hybrid Journal   (Followers: 9, SJR: 0.143, CiteScore: 0)
Advances in Nutrition     Hybrid Journal   (Followers: 61, SJR: 2.196, CiteScore: 5)
Aesthetic Surgery J.     Hybrid Journal   (Followers: 8, SJR: 1.434, CiteScore: 1)
Aesthetic Surgery J. Open Forum     Open Access   (Followers: 1)
African Affairs     Hybrid Journal   (Followers: 74, SJR: 1.869, CiteScore: 2)
Age and Ageing     Hybrid Journal   (Followers: 95, SJR: 1.989, CiteScore: 4)
Alcohol and Alcoholism     Hybrid Journal   (Followers: 21, SJR: 1.376, CiteScore: 3)
American Entomologist     Hybrid Journal   (Followers: 8)
American Historical Review     Hybrid Journal   (Followers: 217, SJR: 0.467, CiteScore: 1)
American J. of Agricultural Economics     Hybrid Journal   (Followers: 54, SJR: 2.113, CiteScore: 3)
American J. of Clinical Nutrition     Hybrid Journal   (Followers: 233, SJR: 3.438, CiteScore: 6)
American J. of Epidemiology     Hybrid Journal   (Followers: 228, SJR: 2.713, CiteScore: 3)
American J. of Health-System Pharmacy     Full-text available via subscription   (Followers: 64, SJR: 0.595, CiteScore: 1)
American J. of Hypertension     Hybrid Journal   (Followers: 29, SJR: 1.322, CiteScore: 3)
American J. of Jurisprudence     Hybrid Journal   (Followers: 19, SJR: 0.281, CiteScore: 1)
American J. of Legal History     Full-text available via subscription   (Followers: 11, SJR: 0.116, CiteScore: 0)
American Law and Economics Review     Hybrid Journal   (Followers: 31, SJR: 1.053, CiteScore: 1)
American Literary History     Hybrid Journal   (Followers: 19, SJR: 0.391, CiteScore: 0)
Analysis     Hybrid Journal   (Followers: 25, SJR: 1.038, CiteScore: 1)
Animal Frontiers     Hybrid Journal   (Followers: 2)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 15, SJR: 1.423, CiteScore: 3)
Annals of Botany     Hybrid Journal   (Followers: 38, SJR: 1.721, CiteScore: 4)
Annals of Oncology     Hybrid Journal   (Followers: 62, SJR: 5.599, CiteScore: 9)
Annals of the Entomological Society of America     Full-text available via subscription   (Followers: 11, SJR: 0.722, CiteScore: 1)
Annals of Work Exposures and Health     Hybrid Journal   (Followers: 11, SJR: 0.728, CiteScore: 2)
Antibody Therapeutics     Open Access   (Followers: 1)
AoB Plants     Open Access   (Followers: 4, SJR: 1.28, CiteScore: 3)
Applied Economic Perspectives and Policy     Hybrid Journal   (Followers: 18, SJR: 0.858, CiteScore: 2)
Applied Linguistics     Hybrid Journal   (Followers: 66, SJR: 2.987, CiteScore: 3)
Applied Mathematics Research eXpress     Hybrid Journal   (Followers: 1, SJR: 1.241, CiteScore: 1)
Arbitration Intl.     Full-text available via subscription   (Followers: 20)
Arbitration Law Reports and Review     Hybrid Journal   (Followers: 14)
Archives of Clinical Neuropsychology     Hybrid Journal   (Followers: 33, SJR: 0.731, CiteScore: 2)
Aristotelian Society Supplementary Volume     Hybrid Journal   (Followers: 2)
Arthropod Management Tests     Hybrid Journal   (Followers: 2)
Astronomy & Geophysics     Hybrid Journal   (Followers: 47, SJR: 0.146, CiteScore: 0)
Behavioral Ecology     Hybrid Journal   (Followers: 58, SJR: 1.871, CiteScore: 3)
Bioinformatics     Hybrid Journal   (Followers: 396, SJR: 6.14, CiteScore: 8)
Biology Methods and Protocols     Open Access   (Followers: 1)
Biology of Reproduction     Full-text available via subscription   (Followers: 11, SJR: 1.446, CiteScore: 3)
Biometrika     Hybrid Journal   (Followers: 20, SJR: 3.485, CiteScore: 2)
BioScience     Hybrid Journal   (Followers: 30, SJR: 2.754, CiteScore: 4)
Bioscience Horizons : The National Undergraduate Research J.     Open Access   (Followers: 3, SJR: 0.146, CiteScore: 0)
Biostatistics     Hybrid Journal   (Followers: 17, SJR: 1.553, CiteScore: 2)
BJA : British J. of Anaesthesia     Hybrid Journal   (Followers: 233, SJR: 2.115, CiteScore: 3)
BJA Education     Hybrid Journal   (Followers: 69)
Brain     Hybrid Journal   (Followers: 78, SJR: 5.858, CiteScore: 7)
Brain Communications     Open Access   (Followers: 2)
Briefings in Bioinformatics     Hybrid Journal   (Followers: 53, SJR: 2.505, CiteScore: 5)
Briefings in Functional Genomics     Hybrid Journal   (Followers: 3, SJR: 2.15, CiteScore: 3)
British J. for the Philosophy of Science     Hybrid Journal   (Followers: 42, SJR: 2.161, CiteScore: 2)
British J. of Aesthetics     Hybrid Journal   (Followers: 24, SJR: 0.508, CiteScore: 1)
British J. of Criminology     Hybrid Journal   (Followers: 622, SJR: 1.828, CiteScore: 3)
British J. of Social Work     Hybrid Journal   (Followers: 99, SJR: 1.019, CiteScore: 2)
British Medical Bulletin     Hybrid Journal   (Followers: 6, SJR: 1.355, CiteScore: 3)
British Yearbook of Intl. Law     Hybrid Journal   (Followers: 35)
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 3, SJR: 1.376, CiteScore: 1)
Cambridge J. of Economics     Hybrid Journal   (Followers: 76, SJR: 0.764, CiteScore: 2)
Cambridge J. of Regions, Economy and Society     Hybrid Journal   (Followers: 13, SJR: 2.438, CiteScore: 4)
Cambridge Quarterly     Hybrid Journal   (Followers: 11, SJR: 0.104, CiteScore: 0)
Capital Markets Law J.     Hybrid Journal   (Followers: 3, SJR: 0.222, CiteScore: 0)
Carcinogenesis     Hybrid Journal   (Followers: 2, SJR: 2.135, CiteScore: 5)
Cardiovascular Research     Hybrid Journal   (Followers: 16, SJR: 3.002, CiteScore: 5)
Cerebral Cortex     Hybrid Journal   (Followers: 56, SJR: 3.892, CiteScore: 6)
CESifo Economic Studies     Hybrid Journal   (Followers: 24, SJR: 0.483, CiteScore: 1)
Chemical Senses     Hybrid Journal   (Followers: 1, SJR: 1.42, CiteScore: 3)
Children and Schools     Hybrid Journal   (Followers: 8, SJR: 0.246, CiteScore: 0)
Chinese J. of Comparative Law     Hybrid Journal   (Followers: 5, SJR: 0.412, CiteScore: 0)
Chinese J. of Intl. Law     Hybrid Journal   (Followers: 24, SJR: 0.329, CiteScore: 0)
Chinese J. of Intl. Politics     Hybrid Journal   (Followers: 11, SJR: 1.392, CiteScore: 2)
Christian Bioethics: Non-Ecumenical Studies in Medical Morality     Hybrid Journal   (Followers: 10, SJR: 0.183, CiteScore: 0)
Classical Receptions J.     Hybrid Journal   (Followers: 29, SJR: 0.123, CiteScore: 0)
Clean Energy     Open Access   (Followers: 3)
Clinical Infectious Diseases     Hybrid Journal   (Followers: 79, SJR: 5.051, CiteScore: 5)
Communication Theory     Hybrid Journal   (Followers: 29, SJR: 2.424, CiteScore: 3)
Communication, Culture & Critique     Hybrid Journal   (Followers: 29, SJR: 0.222, CiteScore: 1)
Community Development J.     Hybrid Journal   (Followers: 28, SJR: 0.268, CiteScore: 1)
Computer J.     Hybrid Journal   (Followers: 9, SJR: 0.319, CiteScore: 1)
Conservation Physiology     Open Access   (Followers: 3, SJR: 1.818, CiteScore: 3)
Contemporary Women's Writing     Hybrid Journal   (Followers: 12, SJR: 0.121, CiteScore: 0)
Contributions to Political Economy     Hybrid Journal   (Followers: 8, SJR: 0.906, CiteScore: 1)
Critical Values     Full-text available via subscription  
Current Developments in Nutrition     Open Access   (Followers: 5)
Current Legal Problems     Hybrid Journal   (Followers: 29)
Current Zoology     Full-text available via subscription   (Followers: 6, SJR: 1.164, CiteScore: 2)
Database : The J. of Biological Databases and Curation     Open Access   (Followers: 10, SJR: 1.791, CiteScore: 3)
Digital Scholarship in the Humanities     Hybrid Journal   (Followers: 15, SJR: 0.259, CiteScore: 1)
Diplomatic History     Hybrid Journal   (Followers: 25, SJR: 0.45, CiteScore: 1)
DNA Research     Open Access   (Followers: 6, SJR: 2.866, CiteScore: 6)
Dynamics and Statistics of the Climate System     Open Access   (Followers: 4)
Early Music     Hybrid Journal   (Followers: 17, SJR: 0.139, CiteScore: 0)
Econometrics J.     Hybrid Journal   (Followers: 34, SJR: 2.926, CiteScore: 1)
Economic J.     Hybrid Journal   (Followers: 124, SJR: 5.161, CiteScore: 3)
Economic Policy     Hybrid Journal   (Followers: 51, SJR: 3.584, CiteScore: 3)
ELT J.     Hybrid Journal   (Followers: 27, SJR: 0.942, CiteScore: 1)
English Historical Review     Hybrid Journal   (Followers: 60, SJR: 0.612, CiteScore: 1)
English: J. of the English Association     Hybrid Journal   (Followers: 23, SJR: 0.1, CiteScore: 0)
Environmental Entomology     Full-text available via subscription   (Followers: 12, SJR: 0.818, CiteScore: 2)
Environmental Epigenetics     Open Access   (Followers: 2)
Environmental History     Hybrid Journal   (Followers: 28, SJR: 0.408, CiteScore: 1)
EP-Europace     Hybrid Journal   (Followers: 3, SJR: 2.748, CiteScore: 4)
Epidemiologic Reviews     Hybrid Journal   (Followers: 9, SJR: 4.505, CiteScore: 8)
ESHRE Monographs     Hybrid Journal  
Essays in Criticism     Hybrid Journal   (Followers: 23, SJR: 0.113, CiteScore: 0)
European Heart J.     Hybrid Journal   (Followers: 67, SJR: 9.315, CiteScore: 9)
European Heart J. - Cardiovascular Imaging     Hybrid Journal   (Followers: 10, SJR: 3.625, CiteScore: 3)
European Heart J. - Cardiovascular Pharmacotherapy     Full-text available via subscription   (Followers: 2)
European Heart J. - Quality of Care and Clinical Outcomes     Hybrid Journal  
European Heart J. : Case Reports     Open Access   (Followers: 1)
European Heart J. Supplements     Hybrid Journal   (Followers: 7, SJR: 0.223, CiteScore: 0)
European J. of Cardio-Thoracic Surgery     Hybrid Journal   (Followers: 9, SJR: 1.681, CiteScore: 2)
European J. of Intl. Law     Hybrid Journal   (Followers: 240, SJR: 0.694, CiteScore: 1)
European J. of Orthodontics     Hybrid Journal   (Followers: 5, SJR: 1.279, CiteScore: 2)
European J. of Public Health     Hybrid Journal   (Followers: 23, SJR: 1.36, CiteScore: 2)
European Review of Agricultural Economics     Hybrid Journal   (Followers: 12, SJR: 1.172, CiteScore: 2)
European Review of Economic History     Hybrid Journal   (Followers: 31, SJR: 0.702, CiteScore: 1)
European Sociological Review     Hybrid Journal   (Followers: 46, SJR: 2.728, CiteScore: 3)
Evolution, Medicine, and Public Health     Open Access   (Followers: 12)
Family Practice     Hybrid Journal   (Followers: 16, SJR: 1.018, CiteScore: 2)
Fems Microbiology Ecology     Hybrid Journal   (Followers: 19, SJR: 1.492, CiteScore: 4)
Fems Microbiology Letters     Hybrid Journal   (Followers: 29, SJR: 0.79, CiteScore: 2)
Fems Microbiology Reviews     Hybrid Journal   (Followers: 38, SJR: 7.063, CiteScore: 13)
Fems Yeast Research     Hybrid Journal   (Followers: 14, SJR: 1.308, CiteScore: 3)
Food Quality and Safety     Open Access   (Followers: 1)
Foreign Policy Analysis     Hybrid Journal   (Followers: 26, SJR: 1.425, CiteScore: 1)
Forest Science     Hybrid Journal   (Followers: 8, SJR: 0.89, CiteScore: 2)
Forestry: An Intl. J. of Forest Research     Hybrid Journal   (Followers: 16, SJR: 1.133, CiteScore: 3)
Forum for Modern Language Studies     Hybrid Journal   (Followers: 6, SJR: 0.104, CiteScore: 0)
French History     Hybrid Journal   (Followers: 36, SJR: 0.118, CiteScore: 0)
French Studies     Hybrid Journal   (Followers: 21, SJR: 0.148, CiteScore: 0)
French Studies Bulletin     Hybrid Journal   (Followers: 10, SJR: 0.152, CiteScore: 0)
Gastroenterology Report     Open Access   (Followers: 2)
Genome Biology and Evolution     Open Access   (Followers: 17, SJR: 2.578, CiteScore: 4)
Geophysical J. Intl.     Hybrid Journal   (Followers: 39, SJR: 1.506, CiteScore: 3)
German History     Hybrid Journal   (Followers: 27, SJR: 0.161, CiteScore: 0)
GigaScience     Open Access   (Followers: 6, SJR: 5.022, CiteScore: 7)
Global Summitry     Hybrid Journal   (Followers: 1)
Glycobiology     Hybrid Journal   (Followers: 10, SJR: 1.493, CiteScore: 3)
Health and Social Work     Hybrid Journal   (Followers: 68, SJR: 0.388, CiteScore: 1)
Health Education Research     Hybrid Journal   (Followers: 19, SJR: 0.854, CiteScore: 2)
Health Policy and Planning     Hybrid Journal   (Followers: 26, SJR: 1.512, CiteScore: 2)
Health Promotion Intl.     Hybrid Journal   (Followers: 27, SJR: 0.812, CiteScore: 2)
History Workshop J.     Hybrid Journal   (Followers: 33, SJR: 1.278, CiteScore: 1)
Holocaust and Genocide Studies     Hybrid Journal   (Followers: 30, SJR: 0.105, CiteScore: 0)
Human Communication Research     Hybrid Journal   (Followers: 16, SJR: 2.146, CiteScore: 3)
Human Molecular Genetics     Hybrid Journal   (Followers: 11, SJR: 3.555, CiteScore: 5)
Human Reproduction     Hybrid Journal   (Followers: 76, SJR: 2.643, CiteScore: 5)
Human Reproduction Open     Open Access   (Followers: 1)
Human Reproduction Update     Hybrid Journal   (Followers: 18, SJR: 5.317, CiteScore: 10)
Human Rights Law Review     Hybrid Journal   (Followers: 66, SJR: 0.756, CiteScore: 1)
ICES J. of Marine Science: J. du Conseil     Hybrid Journal   (Followers: 59, SJR: 1.591, CiteScore: 3)
ICSID Review : Foreign Investment Law J.     Hybrid Journal   (Followers: 11)
ILAR J.     Hybrid Journal   (Followers: 3, SJR: 1.732, CiteScore: 4)
IMA J. of Applied Mathematics     Hybrid Journal   (SJR: 0.679, CiteScore: 1)
IMA J. of Management Mathematics     Hybrid Journal   (SJR: 0.538, CiteScore: 1)
IMA J. of Mathematical Control and Information     Hybrid Journal   (Followers: 2, SJR: 0.496, CiteScore: 1)
IMA J. of Numerical Analysis - advance access     Hybrid Journal   (SJR: 1.987, CiteScore: 2)
Industrial and Corporate Change     Hybrid Journal   (Followers: 12, SJR: 1.792, CiteScore: 2)
Industrial Law J.     Hybrid Journal   (Followers: 29, SJR: 0.249, CiteScore: 1)
Inflammatory Bowel Diseases     Hybrid Journal   (Followers: 45, SJR: 2.511, CiteScore: 4)
Information and Inference     Free  
Innovation in Aging     Open Access   (Followers: 1)
Insect Systematics and Diversity     Hybrid Journal  
Integrative and Comparative Biology     Hybrid Journal   (Followers: 10, SJR: 1.319, CiteScore: 2)
Integrative Biology     Full-text available via subscription   (Followers: 5, SJR: 1.36, CiteScore: 3)
Integrative Organismal Biology     Open Access  
Interacting with Computers     Hybrid Journal   (Followers: 10, SJR: 0.292, CiteScore: 1)
Interactive CardioVascular and Thoracic Surgery     Hybrid Journal   (Followers: 7, SJR: 0.762, CiteScore: 1)
Intl. Affairs     Hybrid Journal   (Followers: 72, SJR: 1.505, CiteScore: 3)
Intl. Data Privacy Law     Hybrid Journal   (Followers: 22)
Intl. Health     Hybrid Journal   (Followers: 7, SJR: 0.851, CiteScore: 2)
Intl. Immunology     Hybrid Journal   (Followers: 4, SJR: 2.167, CiteScore: 4)
Intl. J. for Quality in Health Care     Hybrid Journal   (Followers: 40, SJR: 1.348, CiteScore: 2)
Intl. J. of Constitutional Law     Hybrid Journal   (Followers: 57, SJR: 0.601, CiteScore: 1)
Intl. J. of Epidemiology     Hybrid Journal   (Followers: 291, SJR: 3.969, CiteScore: 5)
Intl. J. of Law and Information Technology     Hybrid Journal   (Followers: 5, SJR: 0.202, CiteScore: 1)
Intl. J. of Law, Policy and the Family     Hybrid Journal   (Followers: 21, SJR: 0.223, CiteScore: 1)
Intl. J. of Lexicography     Hybrid Journal   (Followers: 9, SJR: 0.285, CiteScore: 1)
Intl. J. of Low-Carbon Technologies     Open Access   (Followers: 1, SJR: 0.403, CiteScore: 1)
Intl. J. of Neuropsychopharmacology     Open Access   (Followers: 3, SJR: 1.808, CiteScore: 4)
Intl. J. of Public Opinion Research     Hybrid Journal   (Followers: 11, SJR: 1.545, CiteScore: 1)
Intl. J. of Refugee Law     Hybrid Journal   (Followers: 38, SJR: 0.389, CiteScore: 1)
Intl. J. of Transitional Justice     Hybrid Journal   (Followers: 14, SJR: 0.724, CiteScore: 2)
Intl. Mathematics Research Notices     Hybrid Journal   (Followers: 1, SJR: 2.168, CiteScore: 1)
Intl. Political Sociology     Hybrid Journal   (Followers: 41, SJR: 1.465, CiteScore: 3)
Intl. Relations of the Asia-Pacific     Hybrid Journal   (Followers: 26, SJR: 0.401, CiteScore: 1)
Intl. Studies Perspectives     Hybrid Journal   (Followers: 9, SJR: 0.983, CiteScore: 1)
Intl. Studies Quarterly     Hybrid Journal   (Followers: 55, SJR: 2.581, CiteScore: 2)
Intl. Studies Review     Hybrid Journal   (Followers: 24, SJR: 1.201, CiteScore: 1)
ISLE: Interdisciplinary Studies in Literature and Environment     Hybrid Journal   (Followers: 2, SJR: 0.15, CiteScore: 0)
ITNOW     Hybrid Journal   (Followers: 1, SJR: 0.103, CiteScore: 0)
J. of African Economies     Hybrid Journal   (Followers: 18, SJR: 0.533, CiteScore: 1)
J. of American History     Hybrid Journal   (Followers: 55, SJR: 0.297, CiteScore: 1)
J. of Analytical Toxicology     Hybrid Journal   (Followers: 15, SJR: 1.065, CiteScore: 2)
J. of Antimicrobial Chemotherapy     Hybrid Journal   (Followers: 16, SJR: 2.419, CiteScore: 4)
J. of Antitrust Enforcement     Hybrid Journal   (Followers: 1)
J. of Applied Poultry Research     Hybrid Journal   (Followers: 5, SJR: 0.585, CiteScore: 1)
J. of Biochemistry     Hybrid Journal   (Followers: 46, SJR: 1.226, CiteScore: 2)

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Similar Journals
Journal Cover
ICES Journal of Marine Science: Journal du Conseil
Journal Prestige (SJR): 1.591
Citation Impact (citeScore): 3
Number of Followers: 59  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1054-3139 - ISSN (Online) 1095-9289
Published by Oxford University Press Homepage  [413 journals]
  • Evaluation of sampling strategies for age determination of cod (Gadus
           morhua) sampled at the North Sea International Bottom Trawl Survey
    • Authors: Jourdain N; Breivik O, Fuglebakk E, et al.
      Pages: 859 - 869
      Abstract: AbstractThe North Sea cod stock assessment is based on indices of abundance-at-age from fishery-independent bottom trawl surveys. The age structure of the catch is estimated by sampling fish for otoliths collection in a length-stratified manner from trawl hauls. Since age determination of fish is costly and time consuming, only a fraction of fish is sampled for age from a larger sample of the length distribution and an age–length key (ALK) is then used to obtain the age distribution. In this study, we evaluate ALK estimators for calculating the indices of abundance-at-age, with and without the assumption of constant age–length structures over relatively large areas. We show that the ALK estimators give similar point estimates of abundance-at-age and yield similar performance with respect to precision. We also quantify the uncertainty of indices of abundance and examine the effect of reducing the number of fish sampled for age determination on precision. For various subsampling strategies of otoliths collection, we show that one fish per 5-cm-length group width per trawl haul is sufficient and the total number of fish subsampled for age from trawl surveys could be reduced by at least half (50%) without appreciable loss in precision.
      PubDate: Sat, 29 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa013
      Issue No: Vol. 77, No. 3 (2020)
  • Ten lessons from the frontlines of science in support of fisheries
    • Authors: Hare J; Browman H.
      Pages: 870 - 877
      Abstract: AbstractAfter 20+ years as a research scientist, I recently made a career change to a scientific administrator in NOAA Fisheries. Part of the NOAA Fisheries mission is to provide scientific advice for fisheries using ecosystem based approaches to management. Where I used to see fisheries science as a relatively straightforward discipline, I now recognize fisheries as a complex socio-ecological system that spans natural and social sciences. With this recognition has come an appreciation for the concept of wicked problems and for the incremental approach to policy-making. Here I describe my perspectives before and after this recognition and present 10 lessons for myself as a guide to providing science in support of fisheries management.
      PubDate: Thu, 12 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa025
      Issue No: Vol. 77, No. 3 (2020)
  • Conflicting perceptions on the life-history covariates of
           density-dependent recruitment based on information-generating equations
    • Authors: Munyandorero J; Zhou S.
      Pages: 878 - 889
      Abstract: AbstractThe stock–recruit steepness (h) and compensation ratio are alternative measures of the degree of density-dependent recruitment. They relate similarly to the longevity-related life-history traits (LRLHTs), but studies using information-generating equations and describing such relationships convey three conflicting perceptions. Perception 1 is that h and the compensation ratio decrease as longevity increases and are highest in short-lived, high-productivity species. This perception, usually believed to be inherent in the definition of steepness, is not substantiated by the very definition and, hence, theoretically is wrong. Perception 2 is that h and the compensation ratio increase with longevity and are highest in long-lived, low-productivity species; this perception may occur when the relationships between natural mortality and other LRLHTs are strong, and is most likely correct. Perception 3 is that h and the compensation ratio are independent of LRLHTs; this perception may be caused by the lack of the relationships between natural mortality and other LRLHTs, and is a distortion of perception 2.
      PubDate: Thu, 12 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa016
      Issue No: Vol. 77, No. 3 (2020)
  • Monitoring fisheries resources at offshore wind farms: BACI vs. BAG
    • Authors: Methratta E; Secor D.
      Pages: 890 - 900
      Abstract: AbstractOffshore wind farms often co-occur with biodiverse marine ecosystems with high ecological, economic, and cultural value. Yet there are many uncertainties about how wind farms affect marine organisms and their environment. The before–after–control–impact (BACI) design, an approach that compares an impact location with an unaffected control both before and after the intervention, is the most common method used to study how offshore wind farms affect finfish. Unfortunately, this design has several methodological limitations that undermine its ability to detect effects in these studies. An alternative approach, the before–after-gradient (BAG) design, would sample along a gradient with increasing distance from the turbines both before and after the intervention, and could overcome many of the limitations of BACI. The BAG design would eliminate the difficult task of finding a suitable control, allow for the assessment of the spatial scale and extent of wind farm effects, and improve statistical power by incorporating distance as an independent variable in analytical models rather than relegating it to the error term. This article explores the strengths and weaknesses of the BACI and BAG designs in the context of offshore wind development and suggests an approach to incorporating the BAG design into existing fisheries surveys and a regional monitoring framework.
      PubDate: Tue, 10 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa026
      Issue No: Vol. 77, No. 3 (2020)
  • What unmanaged fishing patterns reveal about optimal management: applied
           to the balanced harvesting debate
    • Authors: Burgess M; Plank M, Andersen K.
      Pages: 901 - 910
      Abstract: AbstractBalanced harvesting (BH)—the idea of harvesting all species and sizes in proportion to their production rate—has been a topic of recent debate. Developed world fisheries tend to fish more selectively, concentrating on certain species and sizes preferred in the market. However, fishing patterns in some developing countries, with a range of different fishing gears and more generalist markets, more closely resemble BH. The BH debate therefore hinges on whether selective fisheries should become more balanced, whether unselective fisheries should do the opposite, both, or neither. In this study, we use simple and general analytical theory to describe the ideal free distribution that should emerge in unmanaged fisheries, and we show that this ideal free distribution should approximately produce BH only when prices, catchabilities, and fishing costs are similar across species and sizes. We then derive general properties of yield and profit maxima subject to conservation constraints. We find that BH is unlikely to be optimal in any fishery but may be closer to optimal in fisheries in which it emerges without management. Thus, BH may be more useful as a heuristic for understanding differences between fisheries in locally appropriate management than as an exact management strategy.
      PubDate: Tue, 18 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa012
      Issue No: Vol. 77, No. 3 (2020)
  • Simulation testing methods for estimating misreported catch in a
           state-space stock assessment model
    • Authors: Perretti C; Deroba J, Legault C, et al.
      Pages: 911 - 920
      Abstract: AbstractState-space stock assessment models have become increasingly common in recent years due to their ability to estimate unobserved variables and explicitly model multiple sources of random error. Therefore, they may be able to better estimate unobserved processes such as misreported fishery catch. We examined whether a state-space assessment model was able to estimate misreported catch in a simulated fishery. We tested three formulations of the estimation model, which exhibit increasing complexity: (i) assuming no misreporting, (ii) assuming misreporting is constant over time, and (iii) assuming misreporting follows a random walk. We tested these three estimation models against simulations using each of the three assumptions and an additional fourth assumption of uniform random misreporting over time. Overall, the worst estimation errors occurred when misreporting was ignored while it was in fact occurring, while there was a relatively small cost for estimating misreporting when it was not occurring. Estimates of population scale and fishing mortality rate were particularly sensitive to misreporting assumptions. Furthermore, in the uniform random scenario, the relatively simple model that assumed misreporting was fixed across ages and time was more accurate than the more complicated random walk model, despite the increased flexibility of the latter.
      PubDate: Thu, 12 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa034
      Issue No: Vol. 77, No. 3 (2020)
  • An empirical Bayesian approach for estimating fleet- and vessel-level
           bycatch rates in fisheries with effort heterogeneity and limited data: a
           prospective tool for measuring bycatch mitigation performance
    • Authors: Parsa M; Emery T, Williams A, et al.
      Pages: 921 - 929
      Abstract: AbstractMinimizing fishing-induced mortality on bycatch and endangered, threatened or protected species is a necessity for fisheries managers. Estimating individual vessel bycatch rates by dividing the amount of bycatch by effort (nominal rate) can be biased, as it does not consider effort heterogeneity within the fleet and ignores prior knowledge of fleet bycatch rates. We develop an empirical Bayesian approach for estimating individual vessel and fleet bycatch rates that: (i) considers effort heterogeneity among vessels and; (ii) pools data from similar vessels for more accurate estimation. The proposed standardized bycatch rate of a vessel is, therefore, the weighted average of the pool rate and nominal rate of the vessel; where the weights are functions of the vessel’s fishing effort and a constant estimated from the model. We apply this inference method to the estimation of seabird bycatch rates in the component of the Australian Eastern Tuna and Billfish Fishery targeting yellowfin tuna. We illustrate the capability of the method for providing fishery managers with insights on fleet-wide bycatch mitigation performance and the identification of outperforming and underperforming vessels. This method can also be used by fishery managers to develop fleet-wide performance measures or quantitative evaluation standards.
      PubDate: Thu, 27 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa020
      Issue No: Vol. 77, No. 3 (2020)
  • Stable oxygen isotope reconstruction of temperature exposure of the
           Icelandic cod (Gadus morhua) stock over the last 100 years
    • Authors: von Leesen G; Ninnemann U, Campana S, et al.
      Pages: 942 - 952
      Abstract: AbstractIncreasing water temperatures are predicted around the globe, with high amplitudes of warming in Subarctic and Arctic regions where Atlantic cod (Gadus morhua) populations currently flourish. We reconstructed oxygen isotope and temperature chronologies from Icelandic cod otoliths, one of the largest cod stocks in the world, to determine if cod moved or migrated over the last 100 years to avoid increasing water temperatures. For δ18Ootolith analysis, individual annual growth increments from immature and mature life history stages were micromilled from adult otoliths, which were collected in southern Iceland. Linear mixed-effect models confirmed that stable oxygen isotope time series of immature and mature cod differ significantly between both life stages (p < 0.001). Overall, cod otolith δ18O was significantly correlated with water temperature (sea surface temperature: p < 0.001, temperature at 200 m depth: p < 0.01), indicating that Atlantic cod were exposed to fluctuating water temperatures during the past 100 years and did not move as a response to increasing ocean temperatures. All of the alternate physical factors that were considered for the isotope-based variation in the temperature exposure of Icelandic cod were rejected.
      PubDate: Fri, 14 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa011
      Issue No: Vol. 77, No. 3 (2020)
  • Regional ocean models indicate changing limits to biological invasions in
           the Bering Sea
    • Authors: Droghini A; Fischbach A, Watson J, et al.
      Pages: 964 - 974
      Abstract: AbstractMinimal vessel traffic and cold water temperatures are believed to limit non-indigenous species (NIS) in high-latitude ecosystems. We evaluated whether suitable conditions exist in the Bering Sea for the survival and reproduction of NIS. We compiled temperature and salinity thresholds of NIS and compared these to ocean conditions projected during two study periods: recent (2003–2012) and mid-century (2030–2039). We also explored patterns of vessel traffic and connectivity for US Bering Sea ports. We found that the southeastern Bering Sea had suitable conditions for the year-round survival of 80% of NIS assessed (n = 42). This highly suitable area is home to the port of Dutch Harbor, which received the most vessel arrivals and ballast water discharge in the US Bering Sea. Conditions north of 58°N that include sub-zero winter water temperatures were unsuitable for most NIS. While mid-century models predicted a northward expansion of suitable conditions, conditions for reproduction remained marginal. Only 40% of NIS assessed (n = 25) had 6 or more weeks where conditions were suitable for reproduction. Our findings illustrate the potential vulnerability of a commercially important subarctic ecosystem and highlight the need to consider life stages beyond adult survival when evaluating limits to NIS establishment.
      PubDate: Mon, 24 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa014
      Issue No: Vol. 77, No. 3 (2020)
  • Dynamics of lake trout production in the main basin of Lake Huron
    • Authors: He J; Bence J, Madenjian C, et al.
      Pages: 975 - 987
      Abstract: AbstractTo inform lake trout (Salvelinus namaycush) fishery management in Lake Huron that has undergone rapid ecosystem changes, we quantified lake trout production dynamics by coupling age-structured stock assessment and fish bioenergetics models. Our approach revealed the connection between piscivore production and prey consumption, included growth compensation to reproduction losses, and allowed comparisons between long-term dynamics of fishery harvests and fish production. We found that, despite the collapse of alewives, a major non-native pelagic prey fish, lake trout production appeared to be sustainable. To a certain degree, the effect of recent recruitment declines on lake trout production was offset by the release of harvest pressure from subadult lake trout and reduction in fishing and sea lamprey-induced mortality on adult lake trout. Evidence for sustainability also included the finding that no changes in average ratios of annual production to beginning-of-the-year biomass. Juvenile P:B ratio remained as high as 2.1. The effect of growth declines on adult and subadult production was offset by reduction in population mortality. Body growth and condition did not continue to decline when lake trout became more and more reliant on round goby as food, and the dynamics of total consumption of prey fish continued to be recipient controlled.
      PubDate: Tue, 10 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa030
      Issue No: Vol. 77, No. 3 (2020)
  • Trends and drivers of marine fish landings in Portugal since its entrance
           in the European Union
    • Authors: Bueno-Pardo J; Pierce G, Cabecinha E, et al.
      Pages: 988 - 1001
      Abstract: AbstractMarine landings in Portugal have decreased at a higher rate than fishing effort in the last 20 years. Identifying the variables driving the quantity and composition of landings is pivotal to understand the dynamics of the fisheries sector, which entails complex social and environmental aspects. In this study, we investigate the main drivers of marine fish landings in continental Portugal between 1989 and 2014. To identify common trends in time series, and quantify the importance of environmental factors, we applied a dynamic factor analysis considering four regions and three types of gear (trawling, purse-seine, and a multi-gear fishery). Our results show the importance of fishing effort as the most relevant factor driving marine landings in Portugal, both at the long and short terms. In addition, the effect of environmental factors such as the winter river discharge and the spring East Atlantic Teleconnection index should not be neglected, probably through mechanisms affecting coastal productivity. We provide a comprehensive amount of information that permits to improve our understanding of the trends of the most important commercial species in Portugal during the period of study.
      PubDate: Tue, 11 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa010
      Issue No: Vol. 77, No. 3 (2020)
  • Spiny lobster fisheries status across time and a mosaic of spatial
           management regimes
    • Authors: Tewfik A; Babcock E, Phillips M, et al.
      Pages: 1002 - 1016
      Abstract: AbstractIn Belize, the commercial harvest of spiny lobsters has occurred for ∼100 years, provides critical livelihoods, and is the primary seafood export. We determined the first empirical estimate of size at maturity in Belize as well as eight fishery status indicators on several fishing grounds. The carapace lengths (CLs) at 50% maturity varied between males (98 mm) and females (86 mm) and are higher than the existing legal minimum of 76 mm. Time series analysis indicated decreasing proportions of mature individuals, decreasing size, and low spawning potential ratios (SPR) as well as high fishing mortality within fishing grounds. The pattern of decline in population status indicators across fishing grounds is consistent with a historical expansion of effort from north to south and offshore. Many indicators of population status within fishing grounds were improved with increasing area of replenishment zone and opposite to the historical expansion. However, overfishing is a problem across all areas examined. An increase in the legal minimum CL to 86 mm and examination of a maximum size limit will likely have significant positive effects on productivity and SPR, respectively, as well as protecting the pivotal role of spiny lobsters within the ecosystem.
      PubDate: Thu, 06 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa008
      Issue No: Vol. 77, No. 3 (2020)
  • Spatial and temporal distribution patterns of brown shrimp (Crangon
           crangon) derived from commercial logbook, landings, and vessel monitoring
    • Authors: Schulte K; Siegel V, Hufnagl M, et al.
      Pages: 1017 - 1032
      Abstract: AbstractIn this study, logbook, landings, and vessel monitoring system data of German brown shrimp (Crangon crangon L.) fishers were combined to analyse spatial and temporal distribution patterns. Landings per unit effort (LPUE) were standardized to the efficiency level of a reference vessel. The standardization altered the spatial–temporal patterns of the LPUE as the vessels differed by a factor of up to 4.7. LPUE data were separated into two size classes according to sieve fractions. Small brown shrimps were characterized by LPUE values increasing early in the year in shallow waters, especially in estuaries in July. Subsequently, peak LPUE values are reached at the end of September in all depths, but with variable spatial patterns between years. LPUE data indicate a general outward migration between early summer and winter. In winter, large shrimp shows a clear increase in LPUE with depths mainly in regions adjacent to the Dutch coast and a reversed pattern close to the Danish coast. The large size class in winter—which consists mainly of mature or egg-bearing females—showed high LPUE values along two persistent diagonal bands in the German Bight. These patterns could lead to local recruitment overfishing, if fishermen are aware of such patterns.
      PubDate: Wed, 04 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa021
      Issue No: Vol. 77, No. 3 (2020)
  • Seascape connectivity exerts differing effects for fish assemblages in
           distinct habitats of the surf zones of ocean beaches
    • Authors: Mosman J; Henderson C, Olds A, et al.
      Pages: 1033 - 1042
      Abstract: AbstractAnimals move throughout coastal seascapes to disperse, feed, and spawn, including the surf zones of ocean beaches. Yet, the influences of seascape context on surf-zone fish are largely unquantified. We sampled surf-zone fish assemblages with baited remote underwater video deployments at 25 beaches across 50 km of coastline in eastern Australia to determine if variation in the spatial configuration of broader coastal seascapes shapes fish assemblages in different surf-zone habitats. We show that surf zones are not homogenous fish habitats, with offshore bars and nearshore troughs having distinct fish assemblages, shaped by different environmental variables. Fish assemblages of offshore bars were characterized by greater species richness and a higher abundance of indicator species (as identified by Dufrene–Legendre indicator species analysis) when close to rocky reefs and estuaries. In contrast, fish assemblages of nearshore troughs were characterized by greater species richness and a higher abundance of indicator species when far from estuaries, and off wider beaches. Our results highlight the importance of seascape connectivity in structuring surf-zone fish assemblages. Consequently, management approaches need to more thoroughly quantify the effects of seascape connectivity over smaller spatial scales and consider surf zones as key components of broader coastal habitat mosaics.
      PubDate: Tue, 03 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa018
      Issue No: Vol. 77, No. 3 (2020)
  • Long-term temporal stability of Northeast Arctic cod (Gadus morhua)
           otolith morphology
    • Authors: Denechaud C; Smoliński S, Geffen A, et al.
      Pages: 1043 - 1054
      Abstract: AbstractOtolith shape analysis provides a robust tool for the discrimination of many fish stocks in the context of fisheries management. However, there has been little research to examine within-stock temporal stability of otolith morphology in relation to changes in the environment and stock conditions. This study investigated the variability of Northeast Arctic (NEA) cod (Gadus morhua) otolith shape between 1933 and 2015, using elliptical Fourier descriptors extracted from archived material of 2968 mature fish. Series of hierarchical multivariate models were developed to relate shape to the identified optimal windows of some environmental drivers. Differences between years accounted for <3% of the observed variation and no significant differences were found between the average cohort shapes. The models not only confirmed that fish growth was the strongest driver of shape differences, but also highlighted effects of temperature and biomass-related variables at different life stages. Extrinsic factors described only a small fraction of the observed variance, which indicates that environmental changes over time likely account for less than the natural inter-individual variability in otolith shape. These results suggest that overall shape remains relatively stable through time within NEA cod, which further contributes towards a consensus on the biological interpretation of shape differences.
      PubDate: Sat, 29 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz259
      Issue No: Vol. 77, No. 3 (2020)
  • Year-long effects of high pCO2 on the community structure of a tropical
           fore reef assembled in outdoor flumes
    • Authors: Edmunds P; Doo S, Carpenter R, et al.
      Pages: 1055 - 1065
      Abstract: AbstractIn this study, fore reef coral communities were exposed to high pCO2 for a year to explore the relationship between net accretion (Gnet) and community structure (planar area growth). Coral reef communities simulating the fore reef at 17-m depth on Mo’orea, French Polynesia, were assembled in three outdoor flumes (each 500 l) that were maintained at ambient (396 µatm), 782 µatm, and 1434 µatm pCO2, supplied with seawater at 300 l h−1, and exposed to light simulating 17-m depth. The communities were constructed using corals from the fore reef, and the responses of massive Porites spp., Acropora spp., and Pocillopora verrucosa were assessed through monthly measurements of Gnet and planar area. High pCO2 depressed Gnet but did not affect colony area by taxon, although the areas of Acropora spp. and P. verrucosa summed to cause multivariate community structure to differ among treatments. These results suggest that skeletal plasticity modulates the effects of reduced Gnet at high pCO2 on planar growth, at least over a year. The low sensitivity of the planar growth of fore reef corals to the effects of ocean acidification (OA) on net calcification supports the counterintuitive conclusion that coral community structure may not be strongly affected by OA.
      PubDate: Fri, 24 Jan 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa015
      Issue No: Vol. 77, No. 3 (2020)
  • The early life stages of the orange-spotted grouper, Epinephelus coioides,
           exhibit robustness to hypercapnia
    • Authors: Lonthair J; Hwang P, Esbaugh A, et al.
      Pages: 1066 - 1074
      Abstract: AbstractOcean acidification (OA) and other climate change-induced environmental alterations are resulting in unprecedented rates of environmental degradation. This environmental change is generally thought to be too fast for adaptation using evolutionary process dependent on natural selection, and thus, resilience may be related to the presence of existing tolerant genotypes and species. Estuaries undergo natural partial pressure carbon dioxide (pCO2) fluctuations, with levels regularly exceeding predicted end of the century values. In this study, we use the estuarine orange-spotted grouper (Epinephelus coioides) to explore the intrinsic resilience to elevated pCO2. Our sensitivity endpoints included: survival, heart rate, growth, and yolk consumption. Furthermore, we attempted to determine whether their acid–base regulatory machinery was plastic in response to elevated pCO2 by analysing the gene expression of key transporters and ionocyte density. Survival was not significantly altered by exposure to elevated pCO2. Interestingly, the heart rate was significantly elevated at both 1500 and 3100 μatm exposure. However, other metrics of energetic consumption, such as yolk consumption and growth, were not significantly altered. Furthermore, we found no changes in gene expression in vha, nhe3, and nbc, as well as ionocyte density at elevated pCO2. Overall, these results support the hypothesis that estuarine species are resilient to the impacts of OA.
      PubDate: Thu, 27 Feb 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa023
      Issue No: Vol. 77, No. 3 (2020)
  • Science in support of ecologically sound decommissioning strategies for
           offshore man-made structures: taking stock of current knowledge and
           considering future challenges
    • Authors: Birchenough S; Degraer S, Browman H.
      Pages: 1075 - 1078
      Abstract: AbstractThe blue growth agenda has spurred an accelerating exploitation and continued development of the coastal and marine environment. This is also driven by the increasing need to generate renewable energy. In most cases, this has resulted in a large number of man-made structures (MMSs) across several soft sediment environments. The nature of these structures ranges from oil and gas installations to harbour walls, anchored buoys, pipelines and offshore wind farms. These structures host fouling communities that are often new to offshore regions, potentially serving as stepping stones for range-expanding (non-indigenous) species and providing habitat and shelter for a variety of marine species. The altered local biodiversity also affects biological and biogeochemical processes from the water column to the seafloor, either directly (e.g. scouring, organic matter export from piles) or indirectly (e.g. closure or displacement of fisheries) and, hence, ecosystem functioning at various spatial and temporal scales. A proper understanding of the effects of artificial hard substrate and the consequences of its removal (e.g. through decommissioning) to marine biodiversity has yet to develop to maturity. This themed article set contributes to the scientific knowledge base on the impacts of MMSs on marine ecosystems with the specific aim to fertilize and facilitate an evidence-based debate over decommissioning. This discussion will become ever more vital to inform marine spatial planning and future policy decisions on the use and protection of marine resources.
      PubDate: Thu, 16 Apr 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa039
      Issue No: Vol. 77, No. 3 (2020)
  • Impact of an artificial structure on the benthic community composition in
           the southern North Sea: assessed by a morphological and molecular approach
    • Authors: Klunder L; Lavaleye M, Filippidi A, et al.
      Pages: 1247 - 1247
      Abstract: ICES Journal of Marine Science (2019), doi:10.1093/icesjms/fsy114.
      PubDate: Mon, 13 Jan 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz252
      Issue No: Vol. 77, No. 3 (2020)
  • The rapid expansion of yellowtail (Seriola quinqueradiata) spawning ground
           in the East China Sea is linked to increasing recruitment and spawning
           stock biomass
    • Authors: Sassa C; Takahashi M, Konishi Y, et al.
      Pages: 1249 - 1249
      Abstract: ICES Journal of Marine Science (2019), doi:10.1093/icesjms/fsz200.
      PubDate: Mon, 09 Mar 2020 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa006
      Issue No: Vol. 77, No. 3 (2020)
  • Comparison of multiple approaches to calculate time-varying biological
           reference points in climate-linked population-dynamics models
    • Authors: O’Leary C; Thorson J, Miller T, et al.
      Pages: 930 - 941
      Abstract: AbstractFisheries managers use biological reference points (BRPs) as targets or limits on fishing and biomass to maintain productive levels of fish stock biomass. There are multiple ways to calculate BRPs when biological parameters are time varying. Using summer flounder (Paralichthys dentatus) as a case study, we investigated time-varying approaches in concert with climate-linked population models to understand the impact of environmentally driven variability in natural mortality, recruitment, and size-at-age on two commonly used BRPs [B0(t) and F35%(t)]. We used the following two approaches to calculate time-varying BRPs: dynamic-BRP and moving-average-BRP. We quantified the variability and uncertainty of different climate dependencies and estimation approaches, attributed BRP variation to variation in life-history processes, and evaluated how using different approaches impacts estimates of stock status. Results indicate that the dynamic-BRP approach using the climate-linked natural mortality model produced the least variable reference points compared to others calculated. Summer flounder stock status depended on the estimation approach and climate model used. These results emphasize that understanding climate dependencies is important for summer flounder reference points and perhaps other species, and careful consideration is warranted when considering what time-varying approach to use, ideally based upon simulation studies within a proposed set of management procedures.
      PubDate: Thu, 21 Nov 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz215
      Issue No: Vol. 77, No. 3 (2019)
  • Contrasting the variability in spatial distribution of two juvenile
           flatfishes in relation to thermal stanzas in the eastern Bering Sea
    • Authors: Yeung C; Cooper D, Hidalgo M.
      Pages: 953 - 963
      Abstract: AbstractGroundfish species in the Bering Sea are undergoing pronounced changes in spatial distribution and abundance due to warming ocean temperatures. The main drivers of interannual variability in this ecosystem are the alternating warm and cold thermal stanzas. Yellowfin sole (Limanda aspera; YFS) and northern rock sole (Lepidopsetta polyxystra; NRS) are commercially-valuable flatfishes in the Bering Sea and are among the most dominant groundfish species there in numbers and biomass. We examined the variability in the spatial distribution and abundance of juvenile NRS and YFS in relation to the ice and temperature conditions associated with warm-cold thermal shifts from 1982 to 2017. The goal was to assess the implications of the fluctuating thermal environment for Bering Sea flatfish production. We found ice cover and bottom temperature indices in the preceding 1 to 3 years to be the best predictors of NRS juvenile distribution. In contrast, these indices were not significantly correlated with YFS juvenile distribution, which could be an artifact of their relatively low availability to sampling. A warm stanza, as the Bering Sea is currently in, is expected to favor high numbers of NRS juveniles and the northward expansion of their distribution.
      PubDate: Thu, 21 Nov 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz180
      Issue No: Vol. 77, No. 3 (2019)
  • Benthic effects of offshore renewables: identification of knowledge gaps
           and urgently needed research
    • Authors: Dannheim J; Bergström L, Birchenough S, et al.
      Pages: 1092 - 1108
      Abstract: AbstractAs the EU's commitment to renewable energy is projected to grow to 20% of energy generation by 2020, the use of marine renewable energy from wind, wave and tidal resources is increasing. This literature review (233 studies) (i) summarizes knowledge on how marine renewable energy devices affect benthic environments, (ii) explains how these effects could alter ecosystem processes that support major ecosystem services and (iii) provides an approach to determine urgent research needs. Conceptual diagrams were set up to structure hypothesized cause-effect relationships (i.e. paths). Paths were scored for (i) temporal and spatial scale of the effect, (ii) benthic sensitivity to these effects, (iii) the effect consistency and iv) scoring confidence, and consecutively ranked. This approach identified prominent knowledge gaps and research needs about (a) hydrodynamic changes possibly resulting in altered primary production with potential consequences for filter feeders, (b) the introduction and range expansion of non-native species (through stepping stone effects) and, (c) noise and vibration effects on benthic organisms. Our results further provide evidence that benthic sensitivity to offshore renewable effects is higher than previously indicated. Knowledge on changes of ecological functioning through cascading effects is limited and requires distinct hypothesis-driven research combined with integrative ecological modelling.
      PubDate: Fri, 01 Mar 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz018
      Issue No: Vol. 77, No. 3 (2019)
  • The ecology of infrastructure decommissioning in the North Sea: what we
           need to know and how to achieve it
    • Authors: Fowler A; Jørgensen A, Coolen J, et al.
      Pages: 1109 - 1126
      Abstract: AbstractAs decommissioning of oil and gas (O&G) installations intensifies in the North Sea, and worldwide, debate rages regarding the fate of these novel habitats and their associated biota—a debate that has important implications for future decommissioning of offshore wind farms (OWFs). Calls to relax complete removal requirements in some circumstances and allow part of an O&G installation to be left in the marine environment are increasing. Yet knowledge regarding the biological communities that develop on these structures and their ecological role in the North Sea is currently insufficient to inform such decommissioning decisions. To focus debate regarding decommissioning policy and guide ecological research, we review environmental policy objectives in the region, summarize existing knowledge regarding ecological aspects of decommissioning for both O&G and OWF installations, and identify approaches to address knowledge gaps through science–industry collaboration. We find that in some cases complete removal will conflict with other policies regarding protection and restoration of reefs, as well as the conservation of species within the region. Key ecological considerations that are rarely considered during decommissioning decisions are: (i) provision of reef habitat, (ii) productivity of offshore ecosystems, (iii) enhancement of biodiversity, (iv) protection of the seabed from trawling, and (v) enhancement of connectivity. Knowledge gaps within these areas will best be addressed using industry infrastructure and vessels for scientific investigations, re-analysis of historical data held by industry, scientific training of industry personnel, joint research funding opportunities, and trial decommissioning projects.
      PubDate: Sat, 03 Aug 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz143
      Issue No: Vol. 77, No. 3 (2019)
  • Characterizing the first wave of fish and invertebrate colonization on a
           new offshore petroleum platform
    • Authors: Todd V; Williamson L, Cox S, et al.
      Pages: 1127 - 1136
      Abstract: AbstractOffshore Oil & Gas (O&G) infrastructure creates artificial reef complexes that support marine communities in oceans. No studies have characterized the first wave of colonization, which can reveal information about habitat attraction and ecological connectivity. Here we used opportunistically-collected industrial Remotely Operated Vehicles (ROVs) to investigate fish and invertebrate colonization on a new North Sea O&G platform and trenching of an associated pipeline. We observed rapid colonization of fish communities, with increases in species richness (S), abundance (N), and diversity (H′) over the first four days (the entire study period). By contrast, there was minimal change in motile invertebrate communities over the survey period. After trenching, invertebrate S, N and H′ decreased significantly, whilst fish S, N and H′ increased. This study is the first to report on the pioneer wave of fish and invertebrate colonization on O&G infrastructure, thereby providing rare insight into formation of new reef communities in the sea. These short and opportunistic data are valuable in terms of showing what can be discovered from analysis of ‘pre-installation’ ROV footage of O&G structures, of which there are terabytes of data held by O&G companies waiting to be analyzed by environmental scientists.
      PubDate: Sun, 05 May 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz077
      Issue No: Vol. 77, No. 3 (2019)
  • Epifauna associated with subsea pipelines in the North Sea
    • Authors: Lacey N; Hayes P, Birchenough S.
      Pages: 1137 - 1147
      Abstract: AbstractAn increasing number of pipelines across the UK Continental Shelf are reaching the end of their economic life, resulting in a growing impetus on decommissioning. Implicit to the decommissioning process is the evaluation of the environmental impacts of the different decommissioning options, however little is known regarding the epifauna that interact with these structures. This study utilized industry-collected footage from remotely operated vehicle inspections of pipelines to assess the interactions of benthic epifauna with pipelines, and their associated structures, for the first time. Footage was analysed from across the northern and central North Sea to examine relationships between faunal community compositions and pipelines and their protective coverings. The complex habitat of concrete and Link-lok mattresses had the highest numbers of observable taxa. Differences in community composition were largely due to varying proportions of common epilithic species. There was a weak relationship between pipeline covering type and the species composition of the immediately neighbouring substrate. Depth and latitude were the strongest correlators with the observed community compositions. This study has compiled the first dataset on epifaunal associations with subsea pipelines in the North Sea.
      PubDate: Mon, 11 Feb 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsy196
      Issue No: Vol. 77, No. 3 (2019)
  • The past, present, and future of the regulation of offshore chemicals in
           the North Sea—a United Kingdom perspective
    • Authors: Sühring R; Cousins A, Gregory L, et al.
      Pages: 1157 - 1166
      Abstract: AbstractThe North Sea is one of the most studied and exploited ecosystems worldwide. The multiple uses from industrial, transport, as well as recreational activities have required researchers, regulators, and legislators to understand and, where possible, to minimize any expected negative environmental impacts. As with any international sea, assessing the current pressures and management actions resulting from these activities is centred on several national and international legislative instruments. This variety of co-existing legislations makes development processes and regulatory assessments cumbersome and time consuming. Hence there is a need to integrate environmental risk assessment and management across sectors, ensuring smart, cost-effective data generation, as well as supporting and standardizing environmental practices. This paper provides an overview of the changing regulatory frameworks regarding offshore chemicals used in the oil and gas industry, and the process of chemical risk assessment conducted under the Offshore Chemical Notification Scheme (ONCS) in the UK. Our view of methodological, research, and regulatory needs and challenges that should be addressed to ensure an adequate and sustainable assessment of offshore chemical use in the North Sea is discussed. Furthermore, we discuss the issues faced regarding chemicals used in the UK oil and gas sector with respect to declining hydrocarbon production.
      PubDate: Mon, 30 Sep 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz172
      Issue No: Vol. 77, No. 3 (2019)
  • A cross continental scale comparison of Australian offshore recreational
           fisheries research and its applications to Marine Park and fisheries
    • Authors: Lynch T; Smallwood C, Ochwada-Doyle F, et al.
      Pages: 1190 - 1205
      Abstract: AbstractRecreational fishing is popular in Australia and is managed by individual states in consultation with the Commonwealth for those fisheries that they regulate and also for Australian Marine Parks (AMPs). Fishers regularly access both state and offshore Commonwealth waters but this offshore component of the recreational fishery is poorly understood. Our study tested the functionality of existing state-based surveys in Western Australia (WA) and New South Wales (NSW) to better inform Commonwealth fisheries and AMP managers about recreational fishing in their jurisdictions. Catch estimates for nine species of interest to the Commonwealth were developed and two case study AMPs [Ningaloo (WA) and The Hunter (NSW)] were also chosen to test the ability of the state survey data to be disaggregated to the park scale. As each state’s fishery survey designs were contextual to their own management needs, the application of the data to Commonwealth jurisdictions were limited by their statistical power, however aspects of each states surveys still provided useful information. Continued evolution of state-wide survey methods, including collection of precise spatial data, and regional over-sampling would be beneficial, particularly where there are multiple stakeholder and jurisdictional interests. National coordination, to temporally align state surveys, would also add value to the existing approaches.
      PubDate: Mon, 10 Jun 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz092
      Issue No: Vol. 77, No. 3 (2019)
  • The proportion of flatfish recruitment in the North Sea potentially
           affected by offshore windfarms
    • Authors: Barbut L; Vastenhoud B, Vigin L, et al.
      Pages: 1227 - 1237
      Abstract: AbstractUnderstanding the influence of man-made infrastructures on fish population dynamics is an important issue for fisheries management. This is particularly the case because of the steady proliferation of offshore wind farms (OWFs). Several flatfish species are likely to be affected because areas with OWFs in place or planned for show a spatial overlap with their spawning grounds. This study focuses on six commercially important flatfish species in the North Sea: common sole (Solea solea), European plaice (Pleuronectes platessa), turbot (Scophthalmus maximus), brill (Scophtalmus rhombus), European flounder (Platichthys flesus), and common dab (Limanda limanda). We used a particle-tracking model (Larvae&Co) coupled to a 3D hydrodynamic model to assess the effects of spatial overlap of OWFs with the species’ spawning grounds on the larval fluxes to known nursery grounds. An important overlap between planned areas of OWFs and flatfish spawning grounds was detected, with a resulting proportion of settlers originating from those areas varying from 2% to 16%. Our study suggests that European plaice, common dab, and brill could be the most affected flatfish species, yet with some important local disparities across the North Sea. Consequently, the study represents a first step to quantify the potential impact of OWFs on flatfish settlement, and hence on their population dynamics.
      PubDate: Wed, 10 Apr 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsz050
      Issue No: Vol. 77, No. 3 (2019)
  • Forecasting for recreational fisheries management: a derby fishery case
           study with Gulf of Mexico Red Snapper
    • Authors: Farmer N; Froeschke J, Records D.
      Pages: 1248 - 1248
      Abstract: ICES Journal of Marine Science (2020), doi:10.1093/icesjms/fsz238.
      PubDate: Thu, 26 Dec 2019 00:00:00 GMT
      DOI: 10.1093/icesjms/fsaa005
      Issue No: Vol. 77, No. 3 (2019)
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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