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Publisher: Oxford University Press   (Total: 396 journals)

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Showing 1 - 200 of 396 Journals sorted alphabetically
ACS Symposium Series     Full-text available via subscription   (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: 50, SJR: 2.196, CiteScore: 5)
Aesthetic Surgery J.     Hybrid Journal   (Followers: 6, SJR: 1.434, CiteScore: 1)
African Affairs     Hybrid Journal   (Followers: 65, SJR: 1.869, CiteScore: 2)
Age and Ageing     Hybrid Journal   (Followers: 90, SJR: 1.989, CiteScore: 4)
Alcohol and Alcoholism     Hybrid Journal   (Followers: 18, SJR: 1.376, CiteScore: 3)
American Entomologist     Full-text available via subscription   (Followers: 7)
American Historical Review     Hybrid Journal   (Followers: 156, SJR: 0.467, CiteScore: 1)
American J. of Agricultural Economics     Hybrid Journal   (Followers: 42, SJR: 2.113, CiteScore: 3)
American J. of Clinical Nutrition     Hybrid Journal   (Followers: 153, SJR: 3.438, CiteScore: 6)
American J. of Epidemiology     Hybrid Journal   (Followers: 178, SJR: 2.713, CiteScore: 3)
American J. of Hypertension     Hybrid Journal   (Followers: 25, 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: 8, SJR: 0.116, CiteScore: 0)
American Law and Economics Review     Hybrid Journal   (Followers: 27, SJR: 1.053, CiteScore: 1)
American Literary History     Hybrid Journal   (Followers: 16, SJR: 0.391, CiteScore: 0)
Analysis     Hybrid Journal   (Followers: 22, SJR: 1.038, CiteScore: 1)
Animal Frontiers     Hybrid Journal   (Followers: 1)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 15, SJR: 1.423, CiteScore: 3)
Annals of Botany     Hybrid Journal   (Followers: 36, SJR: 1.721, CiteScore: 4)
Annals of Oncology     Hybrid Journal   (Followers: 45, SJR: 5.599, CiteScore: 9)
Annals of the Entomological Society of America     Full-text available via subscription   (Followers: 10, SJR: 0.722, CiteScore: 1)
Annals of Work Exposures and Health     Hybrid Journal   (Followers: 32, SJR: 0.728, CiteScore: 2)
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: 56, 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: 30, SJR: 0.731, CiteScore: 2)
Aristotelian Society Supplementary Volume     Hybrid Journal   (Followers: 3)
Arthropod Management Tests     Hybrid Journal   (Followers: 2)
Astronomy & Geophysics     Hybrid Journal   (Followers: 43, SJR: 0.146, CiteScore: 0)
Behavioral Ecology     Hybrid Journal   (Followers: 52, SJR: 1.871, CiteScore: 3)
Bioinformatics     Hybrid Journal   (Followers: 308, SJR: 6.14, CiteScore: 8)
Biology Methods and Protocols     Hybrid Journal  
Biology of Reproduction     Full-text available via subscription   (Followers: 9, SJR: 1.446, CiteScore: 3)
Biometrika     Hybrid Journal   (Followers: 20, SJR: 3.485, CiteScore: 2)
BioScience     Hybrid Journal   (Followers: 29, SJR: 2.754, CiteScore: 4)
Bioscience Horizons : The National Undergraduate Research J.     Open Access   (Followers: 1, SJR: 0.146, CiteScore: 0)
Biostatistics     Hybrid Journal   (Followers: 17, SJR: 1.553, CiteScore: 2)
BJA : British J. of Anaesthesia     Hybrid Journal   (Followers: 166, SJR: 2.115, CiteScore: 3)
BJA Education     Hybrid Journal   (Followers: 64)
Brain     Hybrid Journal   (Followers: 68, SJR: 5.858, CiteScore: 7)
Briefings in Bioinformatics     Hybrid Journal   (Followers: 49, 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: 35, SJR: 2.161, CiteScore: 2)
British J. of Aesthetics     Hybrid Journal   (Followers: 25, SJR: 0.508, CiteScore: 1)
British J. of Criminology     Hybrid Journal   (Followers: 585, SJR: 1.828, CiteScore: 3)
British J. of Social Work     Hybrid Journal   (Followers: 87, 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: 32)
Bulletin of the London Mathematical Society     Hybrid Journal   (Followers: 4, SJR: 1.376, CiteScore: 1)
Cambridge J. of Economics     Hybrid Journal   (Followers: 64, SJR: 0.764, CiteScore: 2)
Cambridge J. of Regions, Economy and Society     Hybrid Journal   (Followers: 11, SJR: 2.438, CiteScore: 4)
Cambridge Quarterly     Hybrid Journal   (Followers: 9, SJR: 0.104, CiteScore: 0)
Capital Markets Law J.     Hybrid Journal   (Followers: 2, SJR: 0.222, CiteScore: 0)
Carcinogenesis     Hybrid Journal   (Followers: 2, SJR: 2.135, CiteScore: 5)
Cardiovascular Research     Hybrid Journal   (Followers: 14, SJR: 3.002, CiteScore: 5)
Cerebral Cortex     Hybrid Journal   (Followers: 45, SJR: 3.892, CiteScore: 6)
CESifo Economic Studies     Hybrid Journal   (Followers: 17, SJR: 0.483, CiteScore: 1)
Chemical Senses     Hybrid Journal   (Followers: 1, SJR: 1.42, CiteScore: 3)
Children and Schools     Hybrid Journal   (Followers: 5, SJR: 0.246, CiteScore: 0)
Chinese J. of Comparative Law     Hybrid Journal   (Followers: 4, SJR: 0.412, CiteScore: 0)
Chinese J. of Intl. Law     Hybrid Journal   (Followers: 23, SJR: 0.329, CiteScore: 0)
Chinese J. of Intl. Politics     Hybrid Journal   (Followers: 10, 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: 27, SJR: 0.123, CiteScore: 0)
Clean Energy     Open Access   (Followers: 1)
Clinical Infectious Diseases     Hybrid Journal   (Followers: 65, SJR: 5.051, CiteScore: 5)
Clinical Kidney J.     Open Access   (Followers: 3, SJR: 1.163, CiteScore: 2)
Communication Theory     Hybrid Journal   (Followers: 23, SJR: 2.424, CiteScore: 3)
Communication, Culture & Critique     Hybrid Journal   (Followers: 27, SJR: 0.222, CiteScore: 1)
Community Development J.     Hybrid Journal   (Followers: 27, SJR: 0.268, CiteScore: 1)
Computer J.     Hybrid Journal   (Followers: 9, SJR: 0.319, CiteScore: 1)
Conservation Physiology     Open Access   (Followers: 2, SJR: 1.818, CiteScore: 3)
Contemporary Women's Writing     Hybrid Journal   (Followers: 9, SJR: 0.121, CiteScore: 0)
Contributions to Political Economy     Hybrid Journal   (Followers: 5, SJR: 0.906, CiteScore: 1)
Critical Values     Full-text available via subscription  
Current Developments in Nutrition     Open Access   (Followers: 2)
Current Legal Problems     Hybrid Journal   (Followers: 29)
Current Zoology     Full-text available via subscription   (Followers: 2, SJR: 1.164, CiteScore: 2)
Database : The J. of Biological Databases and Curation     Open Access   (Followers: 8, SJR: 1.791, CiteScore: 3)
Digital Scholarship in the Humanities     Hybrid Journal   (Followers: 14, SJR: 0.259, CiteScore: 1)
Diplomatic History     Hybrid Journal   (Followers: 20, SJR: 0.45, CiteScore: 1)
DNA Research     Open Access   (Followers: 5, SJR: 2.866, CiteScore: 6)
Dynamics and Statistics of the Climate System     Open Access   (Followers: 4)
Early Music     Hybrid Journal   (Followers: 16, SJR: 0.139, CiteScore: 0)
Economic Policy     Hybrid Journal   (Followers: 42, SJR: 3.584, CiteScore: 3)
ELT J.     Hybrid Journal   (Followers: 24, SJR: 0.942, CiteScore: 1)
English Historical Review     Hybrid Journal   (Followers: 54, SJR: 0.612, CiteScore: 1)
English: J. of the English Association     Hybrid Journal   (Followers: 14, SJR: 0.1, CiteScore: 0)
Environmental Entomology     Full-text available via subscription   (Followers: 11, SJR: 0.818, CiteScore: 2)
Environmental Epigenetics     Open Access   (Followers: 3)
Environmental History     Hybrid Journal   (Followers: 27, SJR: 0.408, CiteScore: 1)
EP-Europace     Hybrid Journal   (Followers: 2, 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: 17, SJR: 0.113, CiteScore: 0)
European Heart J.     Hybrid Journal   (Followers: 57, SJR: 9.315, CiteScore: 9)
European Heart J. - Cardiovascular Imaging     Hybrid Journal   (Followers: 9, SJR: 3.625, CiteScore: 3)
European Heart J. - Cardiovascular Pharmacotherapy     Full-text available via subscription   (Followers: 1)
European Heart J. - Quality of Care and Clinical Outcomes     Hybrid Journal  
European Heart J. : Case Reports     Open Access  
European Heart J. Supplements     Hybrid Journal   (Followers: 8, 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: 186, SJR: 0.694, CiteScore: 1)
European J. of Orthodontics     Hybrid Journal   (Followers: 4, SJR: 1.279, CiteScore: 2)
European J. of Public Health     Hybrid Journal   (Followers: 20, SJR: 1.36, CiteScore: 2)
European Review of Agricultural Economics     Hybrid Journal   (Followers: 10, SJR: 1.172, CiteScore: 2)
European Review of Economic History     Hybrid Journal   (Followers: 30, SJR: 0.702, CiteScore: 1)
European Sociological Review     Hybrid Journal   (Followers: 42, SJR: 2.728, CiteScore: 3)
Evolution, Medicine, and Public Health     Open Access   (Followers: 11)
Family Practice     Hybrid Journal   (Followers: 16, SJR: 1.018, CiteScore: 2)
Fems Microbiology Ecology     Hybrid Journal   (Followers: 12, SJR: 1.492, CiteScore: 4)
Fems Microbiology Letters     Hybrid Journal   (Followers: 25, SJR: 0.79, CiteScore: 2)
Fems Microbiology Reviews     Hybrid Journal   (Followers: 30, 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: 24, SJR: 1.425, CiteScore: 1)
Forest Science     Hybrid Journal   (Followers: 7, 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: 33, SJR: 0.118, CiteScore: 0)
French Studies     Hybrid Journal   (Followers: 20, 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: 13, SJR: 2.578, CiteScore: 4)
Geophysical J. Intl.     Hybrid Journal   (Followers: 35, SJR: 1.506, CiteScore: 3)
German History     Hybrid Journal   (Followers: 23, SJR: 0.161, CiteScore: 0)
GigaScience     Open Access   (Followers: 4, SJR: 5.022, CiteScore: 7)
Global Summitry     Hybrid Journal   (Followers: 1)
Glycobiology     Hybrid Journal   (Followers: 13, SJR: 1.493, CiteScore: 3)
Health and Social Work     Hybrid Journal   (Followers: 56, SJR: 0.388, CiteScore: 1)
Health Education Research     Hybrid Journal   (Followers: 15, SJR: 0.854, CiteScore: 2)
Health Policy and Planning     Hybrid Journal   (Followers: 25, SJR: 1.512, CiteScore: 2)
Health Promotion Intl.     Hybrid Journal   (Followers: 22, SJR: 0.812, CiteScore: 2)
History Workshop J.     Hybrid Journal   (Followers: 31, SJR: 1.278, CiteScore: 1)
Holocaust and Genocide Studies     Hybrid Journal   (Followers: 28, SJR: 0.105, CiteScore: 0)
Human Communication Research     Hybrid Journal   (Followers: 14, SJR: 2.146, CiteScore: 3)
Human Molecular Genetics     Hybrid Journal   (Followers: 8, SJR: 3.555, CiteScore: 5)
Human Reproduction     Hybrid Journal   (Followers: 69, SJR: 2.643, CiteScore: 5)
Human Reproduction Open     Open Access  
Human Reproduction Update     Hybrid Journal   (Followers: 18, SJR: 5.317, CiteScore: 10)
Human Rights Law Review     Hybrid Journal   (Followers: 58, SJR: 0.756, CiteScore: 1)
ICES J. of Marine Science: J. du Conseil     Hybrid Journal   (Followers: 53, SJR: 1.591, CiteScore: 3)
ICSID Review     Hybrid Journal   (Followers: 11)
ILAR J.     Hybrid Journal   (Followers: 2, 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: 10, SJR: 1.792, CiteScore: 2)
Industrial Law J.     Hybrid Journal   (Followers: 36, SJR: 0.249, CiteScore: 1)
Inflammatory Bowel Diseases     Hybrid Journal   (Followers: 43, SJR: 2.511, CiteScore: 4)
Information and Inference     Free  
Integrative and Comparative Biology     Hybrid Journal   (Followers: 8, SJR: 1.319, CiteScore: 2)
Interacting with Computers     Hybrid Journal   (Followers: 11, SJR: 0.292, CiteScore: 1)
Interactive CardioVascular and Thoracic Surgery     Hybrid Journal   (Followers: 7, SJR: 0.762, CiteScore: 1)
Intl. Affairs     Hybrid Journal   (Followers: 62, SJR: 1.505, CiteScore: 3)
Intl. Data Privacy Law     Hybrid Journal   (Followers: 25)
Intl. Health     Hybrid Journal   (Followers: 6, SJR: 0.851, CiteScore: 2)
Intl. Immunology     Hybrid Journal   (Followers: 3, SJR: 2.167, CiteScore: 4)
Intl. J. for Quality in Health Care     Hybrid Journal   (Followers: 36, SJR: 1.348, CiteScore: 2)
Intl. J. of Constitutional Law     Hybrid Journal   (Followers: 64, SJR: 0.601, CiteScore: 1)
Intl. J. of Epidemiology     Hybrid Journal   (Followers: 237, 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: 24, 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: 11, SJR: 0.724, CiteScore: 2)
Intl. Mathematics Research Notices     Hybrid Journal   (Followers: 1, SJR: 2.168, CiteScore: 1)
Intl. Political Sociology     Hybrid Journal   (Followers: 39, SJR: 1.465, CiteScore: 3)
Intl. Relations of the Asia-Pacific     Hybrid Journal   (Followers: 23, SJR: 0.401, CiteScore: 1)
Intl. Studies Perspectives     Hybrid Journal   (Followers: 9, SJR: 0.983, CiteScore: 1)
Intl. Studies Quarterly     Hybrid Journal   (Followers: 47, SJR: 2.581, CiteScore: 2)
Intl. Studies Review     Hybrid Journal   (Followers: 25, 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: 17, SJR: 0.533, CiteScore: 1)
J. of American History     Hybrid Journal   (Followers: 46, SJR: 0.297, CiteScore: 1)
J. of Analytical Toxicology     Hybrid Journal   (Followers: 14, SJR: 1.065, CiteScore: 2)
J. of Antimicrobial Chemotherapy     Hybrid Journal   (Followers: 15, 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: 40, SJR: 1.226, CiteScore: 2)
J. of Burn Care & Research     Hybrid Journal   (Followers: 9, SJR: 0.768, CiteScore: 2)
J. of Chromatographic Science     Hybrid Journal   (Followers: 18, SJR: 0.36, CiteScore: 1)
J. of Church and State     Hybrid Journal   (Followers: 11, SJR: 0.139, CiteScore: 0)
J. of Communication     Hybrid Journal   (Followers: 54, SJR: 4.411, CiteScore: 5)
J. of Competition Law and Economics     Hybrid Journal   (Followers: 35, SJR: 0.33, CiteScore: 0)
J. of Complex Networks     Hybrid Journal   (Followers: 2, SJR: 1.05, CiteScore: 4)
J. of Computer-Mediated Communication     Open Access   (Followers: 29, SJR: 2.961, CiteScore: 6)
J. of Conflict and Security Law     Hybrid Journal   (Followers: 12, SJR: 0.402, CiteScore: 0)
J. of Consumer Research     Full-text available via subscription   (Followers: 46, SJR: 5.856, CiteScore: 5)

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Journal Cover
Behavioral Ecology
Journal Prestige (SJR): 1.871
Citation Impact (citeScore): 3
Number of Followers: 52  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1045-2249 - ISSN (Online) 1465-7279
Published by Oxford University Press Homepage  [396 journals]
  • Responsible sharing of articles published in Behavioral Ecology
    • Authors: Simmons L.
      Pages: 1003 - 1003
      Abstract: In recent years, there has been significant growth in the use of Scholarly Collaboration Networks (SCNs), such as ResearchGate and In principle, these networks can provide a valuable service to researchers, in hosting of profiles and opportunities for researchers to communicate and collaborate across institutional and geographical boundaries. However, the business models of some SCNs depend on the hosting and redistribution of very large numbers of in-copyright scholarly articles. ResearchGate and are for-profit businesses, funded by prominent investors and venture capital, and they make no contribution to the costs of publishing the articles which they use to generate their traffic, undermining the International Society for Behavioral Ecology’s (ISBE) mission of promoting the discipline of behavioral ecology.
      PubDate: Tue, 17 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary100
      Issue No: Vol. 29, No. 5 (2018)
  • Dear enemies or nasty neighbors' Causes and consequences of variation
           in the responses of group-living species to territorial intrusions
    • Authors: Christensen C; Radford A.
      Pages: 1004 - 1013
      Abstract: Territorial behavior is widespread throughout the animal kingdom, with responses to conspecific intruders differing depending on various ecological, life history, and social factors. One factor which has received considerable research attention is rival identity. Early work provided many examples of species exhibiting relatively stronger responses to strangers versus neighbors (the “dear-enemy” effect) or the opposite (the “nasty-neighbor” effect). However, those studies focused predominantly on single or pair-bonded territory-holders. There is increasing evidence of neighbor–stranger response differences in group-living species (where 3 or more individuals share a territory), and of within-species variation in the relative responses shown to these 2 intruder types. Considering social species is important both because group territoriality is widespread and because group responses include the actions of multiple individuals whose interests and motivations differ. We begin our review with a summary of territoriality in group-living species. We then discuss causes of variation in territorial responses depending on intruder neighbor–stranger identity, considering both between-species differences and those within species arising from context-dependent variation and from individual group members responding differently to the same intrusion. We next detail the consequences of different territorial responses, in terms of both postinteraction behavior and individual benefits and costs. Finally, we suggest 3 key areas—theoretical modeling, hormonal mechanisms, and anthropogenic disturbances—that could be developed when considering the relative responses of territory-holders to neighbors and strangers. Since conflict is a powerful selective force, determining the causes and consequences of variation in group-territorial behavior is important for a full understanding of sociality.
      PubDate: Wed, 14 Feb 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary010
      Issue No: Vol. 29, No. 5 (2018)
  • Where, who, and when' Key drivers of territorial responses: a comment
           on Christensen and Radford
    • Authors: McGregor P; Bee M.
      Pages: 1014 - 1014
      Abstract: Discussions about territorial defense, whether by individuals or groups, must consider the location of the stimulus eliciting a territorial response as a factor that is distinct from individual identity. Such discussions also need to give due prominence to the effects of location. This not a new point; for example, it was made very clearly by Bruce Falls in 1982 (cited in Christensen and Radford 2018) and Christensen and Radford (2018) also mention location briefly. Refocusing attention on location will help to clarify the behavior being discussed and location’s role in relation to other drivers of territorial responses.
      PubDate: Tue, 13 Mar 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary025
      Issue No: Vol. 29, No. 5 (2018)
  • Criteria for studies of dear enemy and nasty neighbor effects: a comment
           on Christensen and Radford
    • Authors: Stamps J.
      Pages: 1015 - 1016
      Abstract: Christensen and Radford (2018) provide a masterful review of neighbor-stranger response differences (NSRD) in group-living species, one which is likely to spur further research on this topic. To that end, I here consider key criteria for determining whether territorial animals exhibit dear enemy (DE) or nasty neighbor (NN) effects, and list the studies of NSRD in group-living species that satisfy these criteria.
      PubDate: Fri, 06 Apr 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary033
      Issue No: Vol. 29, No. 5 (2018)
  • Dynamic conflict among heterogeneous groups: a comment on Christensen and
    • Authors: Thompson F; Cant M.
      Pages: 1016 - 1017
      Abstract: Christensen and Radford (2018) provide a stimulating review of one of many poorly understood aspects of intergroup conflict, “neighbour stranger response differences” or NSRD. We applaud Christensen and Radford for drawing together a disparate literature on group-living species, and for insightful discussion of the complexities of intergroup interactions. NSRD has been the topic of much research in nonsocial species, so it seems natural to ask whether this research helps to understand variation in conflict behavior between heterogeneous groups composed of individuals with varying interests. Sometimes, however, we believe that research on intergroup conflict can be obscured rather than clarified by theory and hypotheses derived to explain individual-level conflict and territoriality.
      PubDate: Fri, 27 Apr 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary044
      Issue No: Vol. 29, No. 5 (2018)
  • Mating and/or social system to explain territorial responses: a comment on
           Christensen and Radford
    • Authors: Kranstauber B; Manser M.
      Pages: 1017 - 1018
      Abstract: Studies investigating territorial interactions often find on the first glance seemingly contradictory results, in some cases the response to neighboring groups is stronger than the response to strangers (nasty-neighbor effect), whereas in other cases the response towards strangers is stronger (dear-enemy effect). Christensen and Radford (2018) provide a comprehensive and much needed review of the different responses for species that collectively defend a territory and what the causes and consequences of these variations may be. In group-living species, not only the identity of the intruder varies but also the resident group living in the territory consists of various individuals that have potentially differing interests and motivations. Therefore, studying these interactions in the context of group- living species is especially interesting, but also highly challenging.
      PubDate: Tue, 03 Apr 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary041
      Issue No: Vol. 29, No. 5 (2018)
  • The importance of understanding costs and benefits: a comment on
           Christensen and Radford
    • Authors: Ridley A; Mirville M.
      Pages: 1018 - 1019
      Abstract: We find the review of Christensen and Radford (2018) timely, and agree with much of the content. Given the highly common occurrence of territorial defense in the animal kingdom, understanding the causes and consequences of variation in behavioral responses during these interactions is paramount. There are 3 main points we would like to make based on Christensen and Radford’s review. First, for group-living species, we absolutely agree that a greater consideration is needed of the different incentives for individual group members to participate in territory defense. Differences in age, sex, rank, and size are prevalent among group members and will affect their decision to (a) remain in the social group or disperse and (b) invest in potentially costly group behaviors, such as territory defense (Mirville 2018; Nelson-Flower et al. 2018). The factors influencing these decisions are fundamental to our understanding of how cooperation both evolves and is maintained (Shen et al. 2017).
      PubDate: Thu, 19 Apr 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary063
      Issue No: Vol. 29, No. 5 (2018)
  • Variation in group territorial behavior: a response to comments on
           Christensen and Radford
    • Authors: Radford A; Christensen C.
      Pages: 1019 - 1020
      Abstract: We are grateful for the thoughtful and positive commentaries (Kranstauber and Manser 2018; McGregor and Bee 2018; Ridley and Mirville 2018; Stamps 2018; Thompson and Cant 2018) written about our recent review on the causes and consequences of variation in the responses of group-living species to territorial intrusions (Christensen and Radford 2018). A clear consensus among the commentators and ourselves is the need for more studies in this research field. Here, we emphasize some key future directions, which reflect both general ideas pertaining to variation in territorial responses (relevant not just to groups but also to individual and pair-bonded territory holders) and ideas more specifically relevant to the study of group-living species.
      PubDate: Thu, 31 May 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary083
      Issue No: Vol. 29, No. 5 (2018)
  • Internal acoustic structuring in pied babbler recruitment cries specifies
           the form of recruitment
    • Authors: Engesser S; Ridley A, Manser M, et al.
      Pages: 1021 - 1030
      Abstract: Language is inherently combinatorial, and parallels of this combinatorial capacity are found in nonhuman systems, with animals combining sounds and calls into larger meaningful structures. However, further analogue examples are central in unveiling the diversity, distribution, and evolutionary drivers of combinatoriality. Here, we provide evidence for internal “meaning-refining” acoustic variation within a larger stereotyped signal in pied babblers (Turdoides bicolor). Using acoustic analyses, we demonstrate that males produce 2 long, raucous, “cry-like” structures, both starting with a wind-up segment grading into repetitions of A/single-note or AB/double-note motifs. Behavioral observations indicated that, consistent with similarities in their larger stereotyped structure, both variants function overall in recruiting group members during locomotion, but the internal A or AB substructure specifies the “precise” form of recruitment, from approaching the caller’s announced location to following it over longer distances. Playing back cries from a stationary loudspeaker further supported that the 2 variants elicit different responses, with more individuals approaching the loudspeaker in response to single-note compared with double-note cries. Additionally, despite similarities in overall distance travelled, group movement was only directional for single-note, but undefined for double-note cries. We suggest that the overall structure of the 2 cry variants conveys the same general meaning, with embedded variation refining this meaning. These results further illustrate the variability of generative mechanisms outside of human language and lend support to the hypothesis that combinatorial structuring may have emerged in species with limited or fixed vocal repertoires in order to enhance communicative output.
      PubDate: Thu, 28 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary088
      Issue No: Vol. 29, No. 5 (2018)
  • High male density favors maintenance over reproduction in a butterfly
    • Authors: Geiger R; Beaulieu M, Franke K, et al.
      Pages: 1031 - 1037
      Abstract: Environmental factors exert strong effects on phenotypic expression. A particularly intriguing factor capable of inducing such plastic responses is the social environment experienced by a specific individual. Such social effects may alter the fitness of focal individuals if they affect the expression of reproductive traits and thus life-history strategies. To examine this question, we investigated the effects of individual density on morphology, reproduction, and behavior of male Bicyclus anynana butterflies. Increasing density significantly increased male body mass and the probability to succeed in aggressive interactions and tended to increase abdomen fat content. At the same time, increasing density significantly decreased courtship activity and tended to decrease sperm number. These results suggest that individual density seemed to induce differential strategic investment into survival and somatic maintenance versus reproduction in male butterflies. Males kept at high densities apparently favored high body mass and storage, which may enable longer survival during times of intense intraspecific competition. Moreover, their competitiveness was enhanced as suggested by a higher success in aggressive interactions. Males kept at low density, in contrast, favored reproduction through increased courtship activity and sperm production. Our study illustrates that the effects of density on the expression of morphological and behavioral traits are complex and difficult to predict, owing to resource-allocation trade-offs resulting in prudent strategic investment.
      PubDate: Fri, 18 May 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary073
      Issue No: Vol. 29, No. 5 (2018)
  • Nest defensibility decreases home-range size in central place foragers
    • Authors: Lameris T; Brown J, Kleyheeg E, et al.
      Pages: 1038 - 1045
      Abstract: Variation in the home-range size of nesting animals is thought to be driven by nutritional requirements, food availability, and predation risk of the animals during foraging. Only few studies have considered that the risk of nest predation may also affect home-range size because nests become more difficult to defend as animals move further away. We used a theoretical model to explore the combined effects of nest defensibility, nest predation risk, and food availability on foraging distance from the nest, and hence home-range size. In our model, foragers adjust the foraging distance around the central place such that the required amount of food is collected within the available time with the lowest predation risk for the nest. We found that foraging distance decreased with food availability and the risk of nest predation during absence, but also with nest defensibility. When food was abundant, both nest predation risk and defensibility hardly influenced foraging distance. When food was scarce, animals able to deter predators foraged close-by, whereas animals less able to deter predators foraged further away. Likewise, animals that were themselves vulnerable to predation stayed closer to their nest if the nest provided safety, as is typical for central place foragers. This study is the first to assess the importance of nest defense and nest predation risk for foraging distance of central place foragers and provides a better understanding of the drivers of home-range size.
      PubDate: Mon, 04 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary077
      Issue No: Vol. 29, No. 5 (2018)
  • Context-specific learning and its implications for social learning
    • Authors: Truskanov N; Shy R, Lotem A.
      Pages: 1046 - 1055
      Abstract: Social learning is widespread but the causes for variation in the use of social versus private information are not always clear. Alongside adaptive explanations, suggesting that animals learn socially only when it is indeed adaptive to do so, it is also possible that the use of social learning is limited by mechanistic constraints. A common, but frequently overlooked challenge for social learning mechanisms is the need to allow learners to solve a problem through watching it being solved by others. This requires animals to be able to shift between contexts: from the context of the observed solution, to the context of the unsolved problem. For instance, for the social learning of cues associated with hidden food, an individual that merely sees a conspecific exploiting the food must, in the later absence of demonstrators or visible rewards, also learn to explore the cue for itself. Here, we show that this shift in context can indeed be difficult. In 2 experiments involving sand colors, house sparrows trained with hidden seeds learned to search for hidden seeds (based on food-color association) better than sparrows trained with exposed seeds. However, the latter showed color preference when tested with seeds exposed on both sand colors. These results demonstrate that context-specific learning makes it difficult to generalize reward-cue association from “exposed” to “hidden” conditions, which may explain why social learning is often more effective when it is based on socially facilitated active search (for hidden food), similar to that used in the context of independent foraging.
      PubDate: Thu, 31 May 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary078
      Issue No: Vol. 29, No. 5 (2018)
  • Female ornamentation is associated with elevated aggression and
           testosterone in a tropical songbird
    • Authors: Enbody E; Boersma J, Schwabl H, et al.
      Pages: 1056 - 1066
      Abstract: In males, testosterone plays a key role in ornament production and linking ornamentation with reproductive behaviors and other traits to produce an integrated phenotype. Less is known about whether females couple testosterone, ornamentation, and aggressive behaviors to achieve female-specific combinations of traits. Ornamentation in females may be the result of correlated expression with male ornamentation, or female traits could arise as the result of sex-specific selection pressures. Resolving between these alternatives is necessary to understand the degree to which selection acts on female traits. The White-shouldered Fairywren (Malurus alboscapulatus) provides a useful context to address these questions because populations vary in degree of female ornamentation, a derived trait, whereas male ornamentation is constant across both populations. We found that ornamented females have higher levels of circulating testosterone and respond more aggressively to experimental territorial intrusions than do unornamented females. These findings are consistent with the idea that, among female White-shouldered Fairywrens, testosterone may mechanistically link plumage and behavioral traits to produce an integrated competitive phenotype, as has been reported for males of closely related species. In contrast, circulating testosterone in males did not differ significantly between populations. More broadly, our findings are consistent with ongoing selection on the mechanisms underlying female ornaments, likely via social selection.
      PubDate: Fri, 01 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary079
      Issue No: Vol. 29, No. 5 (2018)
  • Competition decreases with relatedness and lek size in mole crickets: a
           role for kin selection'
    • Authors: Keane K; Booth W, Howard D, et al.
      Pages: 1067 - 1074
      Abstract: Twenty years ago, Kokko and Lindstrom (1996) introduced the hypothesis that kin selection may drive the evolution of leks, shifting the lek-paradigm away from a competitive framework and spurring research on the relatedness of males on leks. However, support for Kokko and Lindstrom’s kin-selection hypothesis has been sparse; most studies have shown related males to occur on leks no more than expected by chance. Additionally, evidence supporting the proposed mechanism is mixed; by joining a lek, males do not always increase the female visitation rate on a per-capita basis. The prairie mole cricket Gryllotalpa major is a lekking cricket in which male relatives advertise in close proximity. We reject the Kokko–Lindstrom hypothesis for this species because G. major females do not preferentially visit larger leks. Interestingly, more females visited smaller leks, where the presence of larger, more highly related males suggest reduced levels of local competition. Although the mechanism continues to be explored, these results provide an alternative inclusive fitness scenario to consider for lekking species—the existence of kin benefits between related neighbors rather than spread across the lek as a whole.
      PubDate: Thu, 07 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary081
      Issue No: Vol. 29, No. 5 (2018)
  • A chorus of color: hierarchical and graded information content of rapid
           color change signals in chameleons
    • Authors: Ligon R; McGraw K.
      Pages: 1075 - 1087
      Abstract: Animals rely on information-rich signals to minimize costs associated with competition. If fighting ability is linked to stable individual attributes (e.g., morphology), the signals that communicate information about such ability should be relatively static. Conversely, the temporal variability of motivation should favor dynamic threat signals that indicate an animal’s current likelihood of escalating a contest. Though static color ornaments are used by many animals to signal quality or fighting ability, the function of dynamic color change as a social signal has only recently begun to be investigated. Here, we examined the information content of rapid physiological color changes displayed by adult male veiled chameleons Chamaeleo calyptratus during agonistic interactions by conducting experimental trials between live chameleons and standardized, experimentally controlled robochameleon models. Chameleons reliably communicated motivation with dynamic color displays—individuals that brightened were 14 times more likely to approach the robochameleon than nonbrightening individuals. Additionally, chameleons with shorter latencies to maximum stripe brightness had stronger bites, and those displaying brighter, yellower stripes exhibited more aggression. The parallels between dynamic color changes and the vocalizations used to mediate aggressive interactions in other taxa are numerous. The use of particular vocalizations/color changes can signal motivation levels while specific signal elements (e.g., pitch, timing, brightness) may be linked to fighting ability. Because the complexity and potential information content of color signals increases markedly when organisms can display context-specific variation in the expression of these ornaments, the study of dynamic color signals is a field ripe for the investigation of complex visual and signaling strategies.
      PubDate: Tue, 12 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary076
      Issue No: Vol. 29, No. 5 (2018)
  • Let the most motivated win: resource value components affect contest
           outcome in a parasitoid wasp
    • Authors: Mathiron A; Pottier P, Goubault M.
      Pages: 1088 - 1095
      Abstract: Studying physical contests for indivisible resources is a major theme in behavioral ecology. Intensity (aggressiveness) and outcome of such contests may be influenced by individual abilities to gain and keep the resource (resource-holding potential, RHP), but also by the value they place in the resource (resource value, RV). Contestants can assess resource quality directly (objective RV) or estimate it according to their physiological status and their experience (subjective RV). In some parasitoid species, adult females fight for hosts on which they lay eggs and feed. Here, we studied contests between 2 females of the solitary parasitoid Eupelmus vuilleti when exploiting simultaneously a host: a fourth instar larva or a pupa of the cowpea seed beetle Callosobruchus maculatus. We first demonstrated that fourth instar larvae represent a resource of higher objective RV because offspring that developed on such hosts were heavier. We then showed that both objective (host quality) and subjective (initial egg load and habitat quality) RV did not influence oviposition decisions, but interacted to affect aggressiveness and contest outcome. Females won more frequently when they had more mature eggs than their opponent, but this effect was less pronounced when fighting for a high-quality host. In addition, females from high-quality habitat were more aggressive and more frequently won contests over low-quality hosts, whereas females from low-quality habitat were more aggressive and more frequently won contests over high-quality hosts. This experiment thus highlights the complex relationships existing between key factors that affect animals’ conflict resolution.
      PubDate: Tue, 05 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary084
      Issue No: Vol. 29, No. 5 (2018)
  • Sexual selection across sensory modalities: female choice of male
           behavioral and gustatory displays
    • Authors: Berson J; Simmons L.
      Pages: 1096 - 1104
      Abstract: The role of cuticular hydrocarbons in sexual displays has received considerable interest over the last two decades. For example, multiple studies have documented significant directional and nonlinear sexual selection acting on the cuticular hydrocarbon profiles of both male and female insects. The majority of these studies have excluded other sensory modalities that may influence attractiveness and measured selection using laboratory raised individuals. Furthermore, much of this work has been conducted using drosophilid fruit flies and crickets, and investigations using different taxa are necessary to improve our understanding of broader taxonomic trends. Here, we extend our understanding of sexual selection on cuticular hydrocarbons by measuring selection imposed by female mate choice on male bull-horned dung beetles, Onthophagus taurus. Both male and female beetles used in our study were collected from the field, ensuring that our estimates of selection incorporated some degree of naturally occurring variation in both cuticular hydrocarbon profiles and female mate preferences. Consistent with previous studies on this species, we found significant directional selection on male courtship displays. We also found significant nonlinear selection on the male cuticular hydrocarbon profile acting independently of the influence of behavioral courtship. Our data are consistent with a role for cuticular hydrocarbons in the mating system of this species and suggest that female O. taurus use multiple sensory modalities to assess different aspects of male quality.
      PubDate: Wed, 06 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary085
      Issue No: Vol. 29, No. 5 (2018)
  • Organization enhances collective vigilance in the hovering guards of
           Tetragonisca angustula bees
    • Authors: Shackleton K; Alves D, Ratnieks F.
      Pages: 1105 - 1112
      Abstract: One benefit of group living is vigilance against predators. Previous studies have investigated the group size effect, where individual vigilance decreases as group size increases without reducing the overall ability of the group to detect predators. However, there has been comparatively little research on whether the positioning of individuals can improve the collective vigilance of the group. We studied the coordination of vigilance and its effect on predator detection in the eusocial bee Tetragonisca angustula. Nests are defended by hovering guards that detect and intercept intruders before they reach the nest entrance, in addition to those that stand upon it. We show that hovering guards are positioned nonrandomly, with a strong tendency for equal numbers on both sides of the entrance. This organization increases the collective vigilance of the guard group, as groups distributed in an even ratio, either side of the entrance, have a greater collective field of view than groups that deviate from an even ratio. Finally, we use a bioassay to show that when guards are on both sides of the entrance, their ability to detect intruders before they reach the entrance increases. Overall, our results provide strong evidence that vigilance is coordinated and that this improves nest defense. Although other group-living animals are often selfish in their individual vigilance behaviors and face competing time constraints such as foraging, the altruistic nature of eusocial insect workers has probably facilitated the evolution of coordinated vigilance, as documented here in T. angustula.
      PubDate: Tue, 12 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary086
      Issue No: Vol. 29, No. 5 (2018)
  • Quick-change artists: male guppies pay no cost to repeatedly adjust their
           sexual strategies
    • Authors: Magris M; Chimetto G, Rizzi S, et al.
      Pages: 1113 - 1123
      Abstract: Sexually selected traits involved in mate acquisition and fertilization success are usually costly and males often plastically adjust their reproductive investment in response to social conditions. Phenotypic plasticity in male sexual traits is generally assumed to be adaptive, yet its costs are rarely investigated. Male guppies (Poecilia reticulata) adjust their ejaculate production and sexual behavior in response to perceived mating opportunities. In natural populations, mating opportunities can fluctuate continuously, and the iterated activation of plastic responses may impose a cost on males. To determine such costs, we experimentally manipulated male social environment by exposing males either to a constant number of females, or to weekly oscillations in female number. We measured traits linked to condition and reproductive success throughout male life. We found no significant difference in the expression of these traits nor in male lifespan between the 2 groups. Our results suggest that male guppies pay negligible costs for the iterated activation of plastic responses, possibly as a consequence of selection to minimize them.
      PubDate: Thu, 14 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary087
      Issue No: Vol. 29, No. 5 (2018)
  • Vegetation structure mediates a shift in predator avoidance behavior in a
           range-edge population
    • Authors: Johnston C; Smith R.
      Pages: 1124 - 1131
      Abstract: Where organisms encounter novel conditions during range expansion, behavioral changes suited to the new habitat can enhance survival. Behavioral changes that mitigate predation risk are particularly important for the persistence of range-edge populations, especially where plastic responses outpace genetic adaptation. We use a climate-driven spatial mismatch between the arboreal mangrove tree crab (Aratus pisonii) and its primary mangrove habitat to evaluate differences in predator avoidance behavior between populations in range-center mangroves and adjacent range-edge salt marshes. We expected that differences in vegetation stature and diameter mediate changes in Aratus behavior. We combined crab and vegetation surveys with tethering experiments and in situ behavioral trials to determine habitat-specific predation risk and predator avoidance via evasion and autotomy. Tethering trials revealed that predation risk was always greater from aquatic sources than terrestrial sources and that aquatic risk was enhanced in marsh habitat. Vegetation structural form constrained Aratus predator avoidance during in situ behavioral assays: in mangroves, Aratus escaped upward into the canopy, but short-statured marsh grass restricted evasion to downward movement towards the higher risk aquatic environment. Given this restricted evasion route, Aratus in salt marshes were less likely to evade and showed more evidence of secondary escape via leg dropping. Shifting predator avoidance behavior away from a fleeing escape strategy may ameliorate the fitness costs of reduced escape opportunities for Aratus in novel marsh habitat along the range edge. Similar changes in behavior to match local habitat conditions could be integral to the persistence of many range-edge populations that encounter novel habitats.
      PubDate: Sat, 02 Jun 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary075
      Issue No: Vol. 29, No. 5 (2018)
  • Larval pheromones act as colony-wide regulators of collective foraging
           behavior in honeybees
    • Authors: Ma R; Villar G, Grozinger C, et al.
      Pages: 1132 - 1141
      Abstract: When animals move or forage in groups, collective behaviors arise from independent decisions that individuals make based on limited information about the environment. In decentralized systems in which individuals use local cues to decide how to allocate their time amongst multiple tasks, a “global” signal detectable over large distances by all members of the group could have a profound effect on task allocation and coordination. Honeybees provide a unique opportunity to study how information transfer modulates behavior because they produce pheromones that can regulate the actions of thousands of individuals in a colony. We used electrophysiological and behavioral assays to compare the transmission modes of 2 larval pheromones to test the hypothesis that larval pheromones can act as “global” signals by rapidly regulating behavior throughout a colony without direct physical interactions between individuals. By studying mechanisms of pheromone transmission at the individual and colony level, we provide evidence that larval pheromones act as direct rapid and powerful regulators of behavior, even among individuals too far away from each other to use visual or tactile cues. Therefore, our results suggest that in some cases, global signals can be important regulators of collective behavior.
      PubDate: Wed, 04 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary090
      Issue No: Vol. 29, No. 5 (2018)
  • No evidence for parent–offspring competition in the burying beetle
           Nicrophorus vespilloides
    • Authors: Gray F; Richardson J, Ratz T, et al.
      Pages: 1142 - 1149
      Abstract: In species where family members share a limited pool of resources, there may be competition between parents and their dependent offspring for access to these resources. Parent–offspring competition may impose a cost to family living that would constrain the evolution of parental care and family living. Yet, few studies have tested for evidence of parent–offspring competition. Here we test for parent–offspring competition in the burying beetle Nicrophorus vespilloides. This species breeds on carcasses of small vertebrates that serve as food for both parents and offspring. We used a two-by-two factorial design, where we manipulated female nutritional state (food deprivation vs. control treatments) and the amount of resources (small vs. large mouse carcasses). We find that food-deprived females lost more mass than controls over the 9-day long food deprivation treatment, confirming that food deprivation caused a substantial decline in female nutritional state at the start of breeding. However, we find no evidence that increased food consumption by food-deprived females had a greater impact on offspring growth or survival when breeding on small carcasses. Instead, poor female nutritional state had a negative impact on offspring survival when females bred on large carcasses. There was more mould on the carcass when food-deprived females bred on a large carcass, suggesting that such females provided less indirect care serving to suppress microbial growth. We conclude that parent–offspring competition is associated with relatively minor costs to family members in this species, suggesting that it may not necessarily constrain the evolution of parental care and family living.
      PubDate: Sat, 07 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary091
      Issue No: Vol. 29, No. 5 (2018)
  • Mate-copying for a costly variant in Drosophila melanogaster females
    • Authors: Nöbel S; Danchin E, Isabel G.
      Pages: 1150 - 1156
      Abstract: Mate-copying is a form of social learning in which witnessing sexual interactions between conspecifics biases an observer individual's future mate-choice. Mate-copying exists in many vertebrates, as well as in Drosophila melanogaster. Here, we show that female fruit flies can copy the choice for mutant males (Curly-wing [Cy] mutants vs. wild types [WTs]) despite the fact that mating with Cy males induces a significant fitness cost for the observer female. When facing WT and Cy males, naive observer females of both phenotypes naturally prefer WT males. In a mate-copying experiment, naive observer Cy or WT females saw a demonstrator female copulating with either a Cy or a WT male aside a lonely male of the opposite phenotype. In the subsequent mate-choice test, the Cy and WT observer females did not change their already high natural preference for WT males after witnessing a WT male copulating during the demonstration. Contrastingly, Cy and WT females increased their preference for the naturally nonpreferred Cy males after witnessing a Cy male copulating, showing that mate-copying also exists for costly variants in invertebrates. Furthermore, mate-copying efficiency did not differ when using neutral artificial variants (coloring, Dagaeff et al. 2016) versus phenotypic variants (this study), suggesting that these 2 types of experiments are equivalently suitable to study mate-copying. We finally discuss how mate-copying can participate to the maintenance of costly traits in a population.
      PubDate: Wed, 04 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary095
      Issue No: Vol. 29, No. 5 (2018)
  • Body stores persist as fitness correlate in a long-distance migrant
           released from food constraints
    • Authors: Dokter A; Fokkema W, Bekker S, et al.
      Pages: 1157 - 1166
      Abstract: Long-distance migratory birds rely on the acquisition of body stores to fuel their migration and reproduction. Breeding success depends on the amount of body stores acquired prior to migration, which is thought to increase with access to food at the fueling site. Here, we studied how food abundance during fueling affected time budgets and reproductive success. In a regime of plenty, we expected that 1) limitations on food harvesting would become lifted, allowing birds to frequently idle, and 2) birds would reach sufficient fuel loads, such that departure weight would no longer affect reproductive success. Our study system comprised brent geese (Branta b. bernicla) staging on high-quality agricultural pastures. Fueling conditions were assessed by a combination of high-resolution GPS tracking, acceleration-based behavioral classification, thermoregulation modeling, and measurements of food digestibility and excretion rates. Mark-resighting analysis was used to test for correlations between departure weight and offspring recruitment. Our results confirm that birds loafed extensively, actively postponed fueling in early spring, and took frequent digestion pauses, suggesting that traditional time constraints on harvest and fueling rates are absent on modern-day fertilized grasslands. Nonetheless, departure weight remained correlated with recruitment success. The persistence of this correlation after a prolonged stopover with access to abundant high-quality food, suggests that between-individual differences in departure condition are not so much enforced by food quality and availability during stopover, but reflect individual quality and longer-lived life-history traits, such as health status and digestive capacity, which may be developed before the fueling period.
      PubDate: Mon, 02 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary080
      Issue No: Vol. 29, No. 5 (2018)
  • Genomic analysis of MHC-based mate choice in the monogamous California
    • Authors: Meléndez-Rosa J; Bi K, Lacey E.
      Pages: 1167 - 1180
      Abstract: Variation at Major Histocompatibility Complex (MHC) genes is thought to be an important mechanism underlying mate choice in vertebrates, with individuals typically predicted to prefer MHC-dissimilar reproductive partners. However, analyses based on individual MHC loci have generated contradictory results regarding the role of these genes in mate-choice decisions. To provide a more comprehensive assessment of relationships between MHC variation and mating behavior, we used an exome capture strategy to characterize variability at 13 MHC loci, 312 innate immune system genes, and 1044 nonimmune genes in 25 obligate monogamous pairs of California mice (Peromyscus californicus) from 2 free-living populations of this species in Monterey County, California. Pairwise genotypic comparisons and analyses of SNP-based allelic differences failed to detect disassortative mating based on MHC variability; reproductive partners were not more dissimilar than randomly generated male–female pairs at MHC, innate or nonimmune loci. Within populations, individuals tended to be more closely related at MHC genes than at innate or nonimmune genes. Consistent with the functional role of immunogenes, the 2 study populations were highly differentiated at MHC and innate genes but not at nonimmune loci. Collectively, our results suggest that MHC genetic variation in California mice reflects local differences in pathogen exposure rather than disassortative mating based on variability at MHC Class I and II genes.
      PubDate: Thu, 12 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary096
      Issue No: Vol. 29, No. 5 (2018)
  • Effects of experimental anthropogenic noise on avian settlement patterns
           and reproductive success
    • Authors: Injaian A; Poon L, Patricelli G.
      Pages: 1181 - 1189
      Abstract: The acoustic footprints of factories, roadways, etc. reach far beyond their physical infrastructure because high-amplitude, low-frequency noise can propagate many kilometers. Previous studies found that noise exposure decreases habitat quality and reproductive success for some species. However, few studies have linked the reduction in perceived habitat quality due to noise exposure to effects on avian settlement patterns and reproductive success. Here, we experimentally investigate the impacts of noise pollution during settlement on adult settlement patterns and subsequent reproductive success in tree swallows (Tachycineta bicolor). We found that tree swallow adults preferentially settled in quieter nest boxes (a 1 dBA increase delayed settlement date by 1.4 and 3.5 days for males and females, respectively). Egg-laying date (a proxy of female quality) also increased by 3.8 days for every 1 dBA increase in noise. These results suggest that lower-quality tree swallows settled in noise; however, more research is needed to confirm this result, as we did not measure adult quality directly. Our results also suggest a negative relationship between noise exposure during settlement and reproductive success, which cannot be explained by differences in adult quality alone. When controlling for egg-laying date, females that settled in noise-exposed nests laid 0.58 fewer eggs than controls. Finally, maternal noise exposure, but not egg-laying date, was negatively related to nestling body condition. These results are concerning, as they highlight multiple pathways through which traffic noise may result in negative impacts at the local, population level for free-living birds.
      PubDate: Tue, 10 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary097
      Issue No: Vol. 29, No. 5 (2018)
  • Experimental cross-fostering of eggs reveals effects of territory quality
           on reproductive allocation
    • Authors: Poorboy D; Bowers E, Sakaluk S, et al.
      Pages: 1190 - 1198
      Abstract: Parental and territory quality are often correlated in territorial birds, and both factors influence the resources allocated to offspring. Surprisingly, the relative contribution of these two components of variation in parental investment remains obscure. We experimentally decoupled the normal covariation between parental quality and territory quality to test the hypothesis that territory quality influences female prenatal and postnatal reproductive allocation. Territories were categorized into low-, intermediate-, and high-quality based on fledging success of nests over the previous 6 years (nesting sites are fixed in space).To decouple covariation between territory quality and individual quality, nestbox entrance size was increased on high-quality territories and left small on poor-quality sites because house wrens (Troglodytes aedon) prefer small over large entrances to their nest sites. We found a significant prenatal effect of territory quality on nestling provisioning: when reared on intermediate-quality territories, nestlings hatching from eggs produced on low-quality territories were provisioned at a higher rate than those hatching from eggs produced on high-quality territories. We propose that the increased provisioning was brought about by increased nestling begging mediated by a maternally derived compound, such as corticosterone, transferred to the eggs of stressed females in poor-quality habitat.
      PubDate: Mon, 16 Jul 2018 00:00:00 GMT
      DOI: 10.1093/beheco/ary098
      Issue No: Vol. 29, No. 5 (2018)
School of Mathematical and Computer Sciences
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