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Publisher: Springer-Verlag   (Total: 2335 journals)

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Showing 1 - 200 of 2335 Journals sorted alphabetically
3D Research     Hybrid Journal   (Followers: 19, SJR: 0.214, h-index: 10)
4OR: A Quarterly J. of Operations Research     Hybrid Journal   (Followers: 9, SJR: 1.073, h-index: 25)
AAPS J.     Hybrid Journal   (Followers: 16, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 6, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 16, SJR: 0.723, h-index: 60)
Abhandlungen aus dem Mathematischen Seminar der Universitat Hamburg     Hybrid Journal   (Followers: 2, SJR: 0.447, h-index: 12)
Academic Psychiatry     Full-text available via subscription   (Followers: 22, SJR: 0.492, h-index: 32)
Academic Questions     Hybrid Journal   (Followers: 7, SJR: 0.135, h-index: 6)
Accreditation and Quality Assurance: J. for Quality, Comparability and Reliability in Chemical Measurement     Hybrid Journal   (Followers: 25, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 10, SJR: 0.355, h-index: 20)
Acta Analytica     Hybrid Journal   (Followers: 7, SJR: 0.387, h-index: 6)
Acta Applicandae Mathematicae     Hybrid Journal   (Followers: 1, SJR: 0.624, h-index: 34)
Acta Biotheoretica     Hybrid Journal   (Followers: 5, SJR: 0.419, h-index: 25)
Acta Diabetologica     Hybrid Journal   (Followers: 14, SJR: 1.318, h-index: 46)
Acta Endoscopica     Hybrid Journal   (Followers: 1, SJR: 0.113, h-index: 8)
acta ethologica     Hybrid Journal   (Followers: 4, SJR: 0.465, h-index: 23)
Acta Geochimica     Hybrid Journal   (Followers: 3)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 1, SJR: 0.294, h-index: 13)
Acta Geotechnica     Hybrid Journal   (Followers: 6, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 9, SJR: 8.021, h-index: 47)
Acta Mathematica Hungarica     Hybrid Journal   (Followers: 2, SJR: 0.53, h-index: 29)
Acta Mathematica Sinica, English Series     Hybrid Journal   (Followers: 5, SJR: 0.406, h-index: 30)
Acta Mathematica Vietnamica     Hybrid Journal   (SJR: 0.451, h-index: 5)
Acta Mathematicae Applicatae Sinica, English Series     Hybrid Journal   (SJR: 0.22, h-index: 20)
Acta Mechanica     Hybrid Journal   (Followers: 18, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 4, SJR: 0.426, h-index: 29)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5, SJR: 0.525, h-index: 18)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.524, h-index: 14)
Acta Neurochirurgica     Hybrid Journal   (Followers: 7, SJR: 0.833, h-index: 73)
Acta Neurologica Belgica     Hybrid Journal   (SJR: 0.348, h-index: 27)
Acta Neuropathologica     Hybrid Journal   (Followers: 3, SJR: 6.61, h-index: 117)
Acta Oceanologica Sinica     Hybrid Journal   (Followers: 3, SJR: 0.295, h-index: 17)
Acta Parasitologica     Hybrid Journal   (Followers: 9, SJR: 0.581, h-index: 28)
Acta Physiologiae Plantarum     Hybrid Journal   (Followers: 2, SJR: 0.551, h-index: 39)
Acta Politica     Hybrid Journal   (Followers: 13, SJR: 0.658, h-index: 20)
adhäsion KLEBEN & DICHTEN     Hybrid Journal   (Followers: 5, SJR: 0.103, h-index: 4)
ADHD Attention Deficit and Hyperactivity Disorders     Hybrid Journal   (Followers: 20, SJR: 0.871, h-index: 15)
Adhesion Adhesives & Sealants     Hybrid Journal   (Followers: 7)
Administration and Policy in Mental Health and Mental Health Services Research     Partially Free   (Followers: 15, SJR: 0.795, h-index: 40)
Adsorption     Hybrid Journal   (Followers: 4, SJR: 0.774, h-index: 52)
Advances in Applied Clifford Algebras     Hybrid Journal   (Followers: 3, SJR: 0.319, h-index: 15)
Advances in Atmospheric Sciences     Hybrid Journal   (Followers: 34, SJR: 0.959, h-index: 44)
Advances in Computational Mathematics     Hybrid Journal   (Followers: 15, SJR: 1.255, h-index: 44)
Advances in Contraception     Hybrid Journal   (Followers: 2)
Advances in Data Analysis and Classification     Hybrid Journal   (Followers: 48, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 7, SJR: 0.141, h-index: 3)
Advances in Health Sciences Education     Hybrid Journal   (Followers: 23, SJR: 1.397, h-index: 42)
Advances in Manufacturing     Hybrid Journal   (Followers: 3, SJR: 0.2, h-index: 4)
Advances in Polymer Science     Hybrid Journal   (Followers: 40, SJR: 0.637, h-index: 89)
Advances in Therapy     Hybrid Journal   (Followers: 6, SJR: 0.79, h-index: 44)
Aegean Review of the Law of the Sea and Maritime Law     Hybrid Journal   (Followers: 7)
Aequationes Mathematicae     Hybrid Journal   (Followers: 2, SJR: 0.882, h-index: 23)
Aerobiologia     Hybrid Journal   (Followers: 1, SJR: 0.511, h-index: 36)
Aesthetic Plastic Surgery     Hybrid Journal   (Followers: 8, SJR: 0.821, h-index: 49)
African Archaeological Review     Hybrid Journal   (Followers: 14, SJR: 0.612, h-index: 24)
Afrika Matematika     Hybrid Journal   (Followers: 1, SJR: 0.248, h-index: 6)
AGE     Hybrid Journal   (Followers: 7, SJR: 1.358, h-index: 33)
Ageing Intl.     Hybrid Journal   (Followers: 6, SJR: 0.337, h-index: 10)
Aggiornamenti CIO     Hybrid Journal   (Followers: 1)
Aging Clinical and Experimental Research     Hybrid Journal   (Followers: 3, SJR: 0.529, h-index: 55)
Agricultural Research     Hybrid Journal   (Followers: 3)
Agriculture and Human Values     Hybrid Journal   (Followers: 12, SJR: 1.197, h-index: 49)
Agroforestry Systems     Hybrid Journal   (Followers: 20, SJR: 0.64, h-index: 56)
Agronomy for Sustainable Development     Hybrid Journal   (Followers: 10, SJR: 1.732, h-index: 59)
AI & Society     Hybrid Journal   (Followers: 7, SJR: 0.171, h-index: 19)
AIDS and Behavior     Hybrid Journal   (Followers: 13, SJR: 2.006, h-index: 71)
Air Quality, Atmosphere & Health     Hybrid Journal   (Followers: 2, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 2, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (SJR: 0.868, h-index: 20)
Algorithmica     Hybrid Journal   (Followers: 7, SJR: 0.898, h-index: 56)
Allergo J.     Full-text available via subscription   (Followers: 1, SJR: 0.183, h-index: 20)
Allergo J. Intl.     Hybrid Journal   (Followers: 2)
Alpine Botany     Hybrid Journal   (Followers: 3, SJR: 0.729, h-index: 20)
ALTEX : Alternatives to Animal Experimentation     Open Access   (Followers: 3, SJR: 1.392, h-index: 32)
AMBIO     Hybrid Journal   (Followers: 14, SJR: 1.094, h-index: 87)
American J. of Cardiovascular Drugs     Hybrid Journal   (Followers: 10, SJR: 0.864, h-index: 39)
American J. of Community Psychology     Hybrid Journal   (Followers: 24, SJR: 1.237, h-index: 83)
American J. of Criminal Justice     Hybrid Journal   (Followers: 5, SJR: 0.634, h-index: 13)
American J. of Cultural Sociology     Hybrid Journal   (Followers: 11, SJR: 0.283, h-index: 3)
American J. of Dance Therapy     Hybrid Journal   (Followers: 4, SJR: 0.175, h-index: 13)
American J. of Potato Research     Hybrid Journal   (Followers: 2, SJR: 0.558, h-index: 35)
American J. of Psychoanalysis     Hybrid Journal   (Followers: 20, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 10, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 8, SJR: 1.362, h-index: 83)
AMS Review     Partially Free   (Followers: 4)
Analog Integrated Circuits and Signal Processing     Hybrid Journal   (Followers: 5, SJR: 0.21, h-index: 37)
Analysis and Mathematical Physics     Hybrid Journal   (Followers: 4, SJR: 0.665, h-index: 7)
Analysis in Theory and Applications     Hybrid Journal  
Analysis of Verbal Behavior     Hybrid Journal   (Followers: 4)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 32, SJR: 1.096, h-index: 123)
Anatomical Science Intl.     Hybrid Journal   (Followers: 2, SJR: 0.301, h-index: 26)
Angewandte Schmerztherapie und Palliativmedizin     Hybrid Journal  
Angiogenesis     Hybrid Journal   (Followers: 3, SJR: 2.212, h-index: 69)
Animal Cognition     Hybrid Journal   (Followers: 13, SJR: 1.122, h-index: 55)
Annales françaises de médecine d'urgence     Hybrid Journal   (Followers: 1, SJR: 0.156, h-index: 4)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3, SJR: 1.377, h-index: 32)
Annales mathématiques du Québec     Hybrid Journal   (Followers: 4)
Annali dell'Universita di Ferrara     Hybrid Journal   (SJR: 0.504, h-index: 14)
Annali di Matematica Pura ed Applicata     Hybrid Journal   (Followers: 1, SJR: 1.167, h-index: 26)
Annals of Behavioral Medicine     Hybrid Journal   (Followers: 10, SJR: 2.112, h-index: 98)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18, SJR: 1.182, h-index: 94)
Annals of Combinatorics     Hybrid Journal   (Followers: 3, SJR: 0.849, h-index: 15)
Annals of Data Science     Hybrid Journal   (Followers: 8)
Annals of Dyslexia     Hybrid Journal   (Followers: 9, SJR: 0.857, h-index: 40)
Annals of Finance     Hybrid Journal   (Followers: 26, SJR: 0.686, h-index: 14)
Annals of Forest Science     Hybrid Journal   (Followers: 4, SJR: 0.929, h-index: 57)
Annals of Global Analysis and Geometry     Hybrid Journal   (Followers: 1, SJR: 1.136, h-index: 23)
Annals of Hematology     Hybrid Journal   (Followers: 13, SJR: 1.117, h-index: 62)
Annals of Mathematics and Artificial Intelligence     Hybrid Journal   (Followers: 6, SJR: 0.593, h-index: 42)
Annals of Microbiology     Hybrid Journal   (Followers: 9, SJR: 0.402, h-index: 26)
Annals of Nuclear Medicine     Hybrid Journal   (Followers: 5, SJR: 0.68, h-index: 45)
Annals of Operations Research     Hybrid Journal   (Followers: 8, SJR: 1.186, h-index: 78)
Annals of Regional Science     Hybrid Journal   (Followers: 7, SJR: 0.405, h-index: 42)
Annals of Software Engineering     Hybrid Journal   (Followers: 12)
Annals of Solid and Structural Mechanics     Hybrid Journal   (Followers: 9, SJR: 0.553, h-index: 8)
Annals of Surgical Oncology     Hybrid Journal   (Followers: 11, SJR: 1.902, h-index: 127)
Annals of Telecommunications     Hybrid Journal   (Followers: 7, SJR: 0.315, h-index: 25)
Annals of the Institute of Statistical Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.931, h-index: 31)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5, SJR: 0.992, h-index: 87)
Apidologie     Hybrid Journal   (Followers: 4, SJR: 1.14, h-index: 57)
APOPTOSIS     Hybrid Journal   (Followers: 7, SJR: 1.554, h-index: 87)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2, SJR: 0.354, h-index: 27)
Applications of Mathematics     Hybrid Journal   (Followers: 1, SJR: 0.274, h-index: 20)
Applied Biochemistry and Biotechnology     Hybrid Journal   (Followers: 45, SJR: 0.575, h-index: 80)
Applied Biochemistry and Microbiology     Hybrid Journal   (Followers: 17, SJR: 0.267, h-index: 26)
Applied Categorical Structures     Hybrid Journal   (Followers: 2, SJR: 0.361, h-index: 21)
Applied Composite Materials     Hybrid Journal   (Followers: 45, SJR: 0.705, h-index: 35)
Applied Entomology and Zoology     Partially Free   (Followers: 2, SJR: 0.554, h-index: 34)
Applied Geomatics     Hybrid Journal   (Followers: 3, SJR: 0.323, h-index: 9)
Applied Geophysics     Hybrid Journal   (Followers: 7, SJR: 0.541, h-index: 13)
Applied Intelligence     Hybrid Journal   (Followers: 13, SJR: 0.777, h-index: 43)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 3, SJR: 0.358, h-index: 34)
Applied Mathematics & Optimization     Hybrid Journal   (Followers: 4, SJR: 0.955, h-index: 33)
Applied Mathematics - A J. of Chinese Universities     Hybrid Journal   (SJR: 0.275, h-index: 8)
Applied Mathematics and Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.37, h-index: 26)
Applied Microbiology and Biotechnology     Hybrid Journal   (Followers: 61, SJR: 1.262, h-index: 161)
Applied Physics A     Hybrid Journal   (Followers: 8, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 22, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 5, SJR: 0.677, h-index: 47)
Applied Research in Quality of Life     Hybrid Journal   (Followers: 10, SJR: 0.288, h-index: 15)
Applied Solar Energy     Hybrid Journal   (Followers: 16, SJR: 0.251, h-index: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 4, SJR: 0.351, h-index: 9)
Aquaculture Intl.     Hybrid Journal   (Followers: 21, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 31, SJR: 0.646, h-index: 44)
Aquatic Geochemistry     Hybrid Journal   (Followers: 3, SJR: 0.764, h-index: 39)
Aquatic Sciences     Hybrid Journal   (Followers: 12, SJR: 1.172, h-index: 53)
Arabian J. for Science and Engineering     Hybrid Journal   (Followers: 5, SJR: 0.345, h-index: 20)
Arabian J. of Geosciences     Hybrid Journal   (Followers: 1, SJR: 0.417, h-index: 16)
Archaeological and Anthropological Sciences     Hybrid Journal   (Followers: 21, SJR: 1.056, h-index: 15)
Archaeologies     Hybrid Journal   (Followers: 12, SJR: 0.397, h-index: 13)
Archiv der Mathematik     Hybrid Journal   (SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 51, SJR: 0.804, h-index: 22)
Archive for History of Exact Sciences     Hybrid Journal   (Followers: 7, SJR: 0.28, h-index: 15)
Archive for Mathematical Logic     Hybrid Journal   (Followers: 1, SJR: 0.946, h-index: 23)
Archive for Rational Mechanics and Analysis     Hybrid Journal   (SJR: 4.091, h-index: 66)
Archive of Applied Mechanics     Hybrid Journal   (Followers: 4, SJR: 0.865, h-index: 40)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4, SJR: 2.841, h-index: 40)
Archives of Dermatological Research     Hybrid Journal   (Followers: 6, SJR: 0.9, h-index: 65)
Archives of Environmental Contamination and Toxicology     Hybrid Journal   (Followers: 10, SJR: 0.846, h-index: 84)
Archives of Gynecology and Obstetrics     Hybrid Journal   (Followers: 16, SJR: 0.695, h-index: 47)
Archives of Microbiology     Hybrid Journal   (Followers: 8, SJR: 0.702, h-index: 85)
Archives of Orthopaedic and Trauma Surgery     Hybrid Journal   (Followers: 8, SJR: 1.039, h-index: 56)
Archives of Osteoporosis     Hybrid Journal   (Followers: 2, SJR: 1.092, h-index: 13)
Archives of Sexual Behavior     Hybrid Journal   (Followers: 9, SJR: 1.198, h-index: 74)
Archives of Toxicology     Hybrid Journal   (Followers: 16, SJR: 1.595, h-index: 76)
Archives of Virology     Hybrid Journal   (Followers: 4, SJR: 1.086, h-index: 90)
Archives of Women's Mental Health     Hybrid Journal   (Followers: 13, SJR: 1.264, h-index: 50)
Archivio di Ortopedia e Reumatologia     Hybrid Journal  
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2, SJR: 1.2, h-index: 42)
ArgoSpine News & J.     Hybrid Journal   (SJR: 0.102, h-index: 3)
Argumentation     Hybrid Journal   (Followers: 4, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 2, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 8, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 15, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 8, SJR: 0.231, h-index: 14)
Asia Europe J.     Hybrid Journal   (Followers: 4, SJR: 0.247, h-index: 9)
Asia Pacific Education Review     Hybrid Journal   (Followers: 9, SJR: 0.371, h-index: 17)
Asia Pacific J. of Management     Hybrid Journal   (Followers: 11, SJR: 1.676, h-index: 50)
Asia-Pacific Education Researcher     Hybrid Journal   (Followers: 11, SJR: 0.353, h-index: 13)
Asia-Pacific Financial Markets     Hybrid Journal   (Followers: 2, SJR: 0.19, h-index: 15)
Asia-Pacific J. of Atmospheric Sciences     Hybrid Journal   (Followers: 20, SJR: 1.006, h-index: 14)
Asian Business & Management     Hybrid Journal   (Followers: 7, SJR: 0.41, h-index: 10)
Asian J. of Business Ethics     Hybrid Journal   (Followers: 7)
Asian J. of Criminology     Hybrid Journal   (Followers: 5, SJR: 0.263, h-index: 8)
AStA Advances in Statistical Analysis     Hybrid Journal   (Followers: 2, SJR: 0.681, h-index: 15)
AStA Wirtschafts- und Sozialstatistisches Archiv     Hybrid Journal   (Followers: 5, SJR: 0.195, h-index: 5)
ästhetische dermatologie & kosmetologie     Full-text available via subscription  
Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 21, SJR: 4.511, h-index: 44)
Astronomy Letters     Hybrid Journal   (Followers: 19, SJR: 0.58, h-index: 30)
Astronomy Reports     Hybrid Journal   (Followers: 12, SJR: 0.473, h-index: 23)
Astrophysical Bulletin     Hybrid Journal   (Followers: 2, SJR: 0.469, h-index: 11)
Astrophysics     Hybrid Journal   (Followers: 22, SJR: 0.243, h-index: 11)

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Journal Cover Aquaculture International
  [SJR: 0.613]   [H-I: 40]   [21 followers]  Follow
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1573-143X - ISSN (Online) 0967-6120
   Published by Springer-Verlag Homepage  [2335 journals]
  • Behavioural responses of farmed South African abalone Haliotis midae L. to
           disturbances caused by husbandry procedures
    • Authors: Horst Kaiser; Bernard Erasmus; Matthew Naylor
      Pages: 21 - 29
      Abstract: The South African abalone, Haliotis midae L., is an important mariculture species. In the natural environment, abalone move and migrate to new sites to escape from disturbances. This is the first study that tested the effect of disturbances on movement and feeding activity of farmed abalone for 6 days post-disturbance. Disturbances were (a) turning over the feeder plate, (b) moving and shaking the feeder plate and (c) briefly lifting the basket containing the abalone out of the water. Abalone in the control treatment were not subjected to disturbance. Activity levels of abalone were elevated in the first 1–2 nights post-disturbance with 2–3 times more abalone appearing on the walls of the baskets and larger numbers on the feeder plate than in the control treatment. Feed uptake was not influenced by treatment. Thus, even minor disturbances resulted in increased activity. As it takes at least 1 year to conduct growth experiments in this slow-growing mollusc, the results provide a motivation for studies of growth and metabolic rate in this species under a range of husbandry conditions, such as regular handling, sorting and moving of abalone.
      PubDate: 2017-02-01
      DOI: 10.1007/s10499-016-0010-4
      Issue No: Vol. 25, No. 1 (2017)
  • Anaesthetic efficacy of clove oil-coated LDPE bag on improving water
           quality and survival in the Siamese fighting fish, Betta splendens ,
           during transportation
    • Authors: Thanapat Pattanasiri; Wara Taparhudee; Panuwat Suppakul
      Pages: 197 - 209
      Abstract: With brilliant colouration and long, flowing fins, the Siamese fighting fish (Betta splendens) is one of the most popular species of freshwater aquarium fish. In the ornamental Siamese fighting fish business, stress is one of the major causes of fish injury, including collapse of the fins. To overcome this problem, attempts are being made to develop anaesthetic packaging, in which anaesthetic agents are coated onto low-density polyethylene (LDPE) packaging bags and released from the bags. The feasibility of using clove oil-incorporated methylcellulose-coated LDPE bag as a packaging material to induce an anaesthetic effect on Siamese fighting fish during transportation was also investigated. Based on a criterion of fish transportation within 2 days, concentrations of clove oil in anaesthetic-coated LDPE bag ranging from 0 to 11.67 mg L−1 were determined using an aqueous dilution method. Clove oil-incorporated methylcellulose-coated LDPE bags, filled with either 150 or 75 mL water and with equivalent anaesthetic concentrations, induced an anaesthetic effect in a similar manner. After 48 h of fish exposure, the water quality in clove oil-incorporated methylcellulose-coated LDPE bags was better than that of the control treatment. This study demonstrated that clove oil-incorporated methylcellulose-coated LDPE packaging bag could be successfully employed for transportation of Siamese fighting fish; in turn, this will minimize a dropped price when reaching the destination.
      PubDate: 2017-02-01
      DOI: 10.1007/s10499-016-0022-0
      Issue No: Vol. 25, No. 1 (2017)
  • Potential use of bovine lactoferrin as adjuvant for the modulation of the
           specific immune response in rainbow trout ( Oncorhynchus mykiss W.)
    • Authors: Stefano Cecchini; Anna Rocchina Caputo
      Pages: 223 - 232
      Abstract: The present experiment was carried out in order to evaluate the potential adjuvant effect of bovine lactoferrin (bLF) in modulating the specific antibody (Ab) response to an exogenous protein, the human-γ-globulins (HγG), injected intraperitoneally in rainbow trout Oncorhynchus mykiss (Walbaum 1792). Moreover, serum natural antibody (NatAb) level, serum total immunoglobulin (IgM) level and specific Ab response to bLF were also analysed. Experimental data showed that HγG is able to stimulate a specific Ab response when not adjuvanted with Freund’s complete adjuvant (FCA), whereas bLF induces a specific Ab response only if adjuvanted with FCA. Statistical analyses revealed that neither bLF or FCA administered singly had significant effects on serum NatAb and IgM levels, whereas the specific immune response observed against HγG when adjuvanted with bLF was comparable to that achieved when FCA was used as the adjuvant. These results provide evidence of the potential for bLF to be used as an adjuvant for salmonids.
      PubDate: 2017-02-01
      DOI: 10.1007/s10499-016-0024-y
      Issue No: Vol. 25, No. 1 (2017)
  • The effects of different monospecific benthic diatoms on larval
           settlement, metamorphosis, survival, and growth of Haliotis asinina
           Linnaeus in the South China Sea
    • Authors: Jing jing Ding; Bo Huang; Ya qiang Hu; Xiao bing Wang
      Pages: 367 - 377
      Abstract: Settlement, metamorphosis, survival, and growth of Haliotis asinina larvae exposed to settlement surfaces coated with biofilms of four local diatom species (Navicula seminulum, Navicula parva, Nitzschia alexandria, Amphora coffeaeformis) were assessed. After 24 h and 72 h, N. alexandria induced the highest settlement rate (p < 0.001). Larval settlement rate on slats coated with N. seminulum, and A. coffeaeformis was significantly higher after 72 h than after 24 h (p < 0.001). Metamorphosis was not higher than control after 24 h (p > 0.05) for any diatom treatment, but after 72 h, all diatoms induced a significantly higher metamorphosis rate than the control (p < 0.001). N. alexandria induced the highest metamorphic rate (15.71 %). Shell length of post-larvae was not significantly different on day 4 and day 10 (p > 0.05) in diatom film treatments, relative to control. By day 20, post-larvae survived best on slats with N. alexandria (79.86 %). Survival among treatments was the lowest on slats with N. seminulum (54.91 %), and no live larvae were found in the control. Post-larvae on slats with A. coffeaeformis showed the highest daily growth rate of shell length (DGsl) (87.44 μm d−1). Post-larvae on slats with N alexandria showed the lowest DGsl (55.66 μm d−1). Commercial nursery slats seeded with N. alexandria will result in high and consistent settlement, metamorphosis, and survival, while slats with A. coffeaeformis will ensure sufficient food for rapid growth of the H. asinina post-larvae.
      PubDate: 2017-02-01
      DOI: 10.1007/s10499-016-0035-8
      Issue No: Vol. 25, No. 1 (2017)
  • Financial viability of inserting the biofloc technology in a marine shrimp
           Litopenaeus vannamei farm: a case study in the state of Pernambuco, Brazil
    • Authors: Marcelo Augusto Soares Rego; Omar Jorge Sabbag; Roberta Soares; Silvio Peixoto
      Pages: 473 - 483
      Abstract: This study analyzed the financial viability of inserting the biofloc technology (BFT) system and maintaining the conventional culture system for the marine shrimp Litopenaeus vannamei in a farm located in the state of Pernambuco, northeastern Brazil. To obtain information related to investment and operating costs, we used three ponds (625 m2 each) covered with high-density polyethylene operating with the BFT system and data from three conventional ponds (2.86 ha each) used in a farm during 2014. The total production costs of BFT were eight times higher than the conventional system. Operating profit and profitability index were US$ 51,871.54 ha−1 year−1 and 30.22 % for BFT, and US$ 21,523.83 ha−1 year−1 and 59.79 % for the conventional system, respectively. In investment analysis, indicators were favorable for both systems, with greater expressiveness of the net present value (NPV) for the BFT (US$ 142,004.42) and internal rate of return (IRR) 4.5 times higher for conventional system (131.86 %). To achieve favorable results of profitability and viability, combined with the ability to contribute to the sustainable development of marine shrimp farming, the BFT system is a promising alternative to replace traditional systems used in northeastern Brazil.
      PubDate: 2017-02-01
      DOI: 10.1007/s10499-016-0044-7
      Issue No: Vol. 25, No. 1 (2017)
  • Fatty acid composition of five Algerian bisexual and parthenogenetic
           strains of Artemia (Anostraca, Crustacea) and their antimicrobial activity
    • Authors: Mounia Amarouayache; Yavuz Selim Cakmak; Meltem Asan-Ozusaglam; Abdelkader Amorouayeche
      Abstract: The brine shrimp Artemia remains among the most important food used in fish and crustacean larviculture, and the study of its cysts’ nutritional quality is of great importance for products selection. Fatty acids (FAs) from decapsulated cysts of two bisexual (A. salina) and three parthenogenetic strains (A. parthenogenetica) from Algeria have been analyzed by gas chromatography. The aim was, first, to check the suitability of these strains as food for aquaculture and, second, to evaluate the FAs’ efficiency in inhibition of some of the fish pathogen’s activities. Percentages of total lipids were between 7.78 and 24.55% for the parthenogenetic strains of Bethioua and Sidi Bouziane salterns, respectively. Twenty-three FAs have been detected, and a high value of eicosapentaenoic (EPA; 20:5n-3) was observed in the parthenogenetic strain of Sidi Bouziane with 16.25 ± 0.08% (39.89 mg g−1 dry weight). The highest value of α-linolenic (ALA; 18:3n-3) was observed in A. salina from Chott Marouane with 22.28 ± 0.16%, (30.72 mg g−1 dry weight). The results of the antimicrobial screening assay of FA extracts showed their inhibitory activity against six fish pathogens. In comparison with ampicillin (Amp) and kanamycin antibiotics, all the studied strains of Artemia, except Bethioua, had better antimicrobial effect of their FAs against Vibrio anguillarum (gram-negative) than Amp. Streptococcus agalactiae (gram-positive) was the most resistant against Artemia’s FAs. Decapsulated cysts with the highest proportions of PUFAs and rich in ALA and linoleic were the most effective against the bacterial growth. Regarding the FAs’ composition and their antibacterial properties, Algerian strains of Artemia are good candidates for use as food in larviculture.
      PubDate: 2017-03-17
      DOI: 10.1007/s10499-017-0136-z
  • Betanodavirus infection in reared marine fishes along the Arabian Gulf
    • Authors: Singaiah NaveenKumar; Mohamed A Hassan; Mahmoud A. Mahmoud; Adly Al-Ansari; Waleed K Al-Shwared
      Abstract: Betanodavirus or nervous necrosis virus (NNV) is responsible for viral nervous necrosis (VNN) of fishes and is associated with mass mortalities of various fish species throughout the world. Here, we report for the first time Betanodavirus infection in Arabian Gulf region of the Kingdom of Bahrain. The present study is also the first report of mortality due to NNV infection in sobaity seabream Sparidentex hasta. NNV was detected in reared fry of gilthead seabream Sparus aurata and adults of sobaity seabream and brown-spotted grouper Epinephelus chlorostigma using nested PCR. In the present study, the rearing unit recorded 100% mortality in fry of gilthead seabream and 24 and 63% mortalities were recorded in different age groups of adult sobaity seabream due to VNN. Classical clinical signs of VNN such as body discoloration, loss of appetite and abnormal swimming behaviour were observed in fry of gilthead seabream. Histopathological studies revealed characteristic vacuolation and degeneration of brain and ocular tissues of sobaity seabream. However, brown-spotted grouper carried subclinical NNV infection, and there was no mortality in the group. Sequencing of nested PCR products and real-time PCR further confirmed the presence of the virus.
      PubDate: 2017-03-16
      DOI: 10.1007/s10499-017-0134-1
  • A comparison of the fatty acid profiles of newly hatched, fed, and starved
           juveniles of Amphioctopus fangsiao (d’Orbigny 1839)
    • Authors: Vasiliki Tziouveli; Saichiro Yokoyama
      Abstract: The paper provides a first look into the fatty acids (FA) of young Amphioctopus fangsiao. Laboratory-hatched, 1-day-old juveniles (NH) were analyzed to identify the basal FA profile. To determine dietary effects on FA, individually kept juveniles (FD) were fed mysids once daily. Others were subjected to starvation (ST) to examine which FA may be used and which would be conserved. Treatments run for 25 days post-hatch, at which time ST and FD were analyzed to record FA changes. The dominant FA were 16:0, eicosapentaenoic (EPA), and docosahexaenoic (DHA), overall accounting for 40–60%. Monounsaturated FA (MUFA) were the highest in FD at 24.2% whereas highly unsaturated FA (HUFA) were most prominent in ST at 45.5%, followed by NH at 40.2%. Among n-3 HUFA, DHA was dominant in ST at 22.9 mg g−1 dry weight (DW), the role assumed by EPA in FD at 11.5 mg g−1 DW. Consequently, the DHA/EPA ratio was the lowest in FD. Arachidonic was the most abundant n-6 HUFA, representing >5% in total FA. However, n-6 FA were not prevalent, resulting in high n-3/n-6 in all juveniles. It could be argued that young A. fangsiao require n-3 HUFA, particularly DHA and EPA at a ratio of ideally >1.5 and to a lesser extent n-6 HUFA. Juveniles fed on a low lipid, high n-3 diet increased their MUFA content while maintaining high HUFA. Despite changes in the FA of ST individuals, it appears food-deprived A. fangsiao do not depend on FA mobilization for energy production.
      PubDate: 2017-03-16
      DOI: 10.1007/s10499-017-0130-5
  • Research on China’s mariculture efficiency evaluation and influencing
           factors with undesirable outputs—an empirical analysis of China’s ten
           coastal regions
    • Authors: Pingping Wang; Jianyue Ji
      Abstract: Based on the data of China’s ten coastal regions from 2003 to 2012, this paper conducts a data envelopment analysis (DEA) model to evaluate China’s mariculture efficiency with undesirable outputs using Seiford’s linear converting method. The result shows the average efficiency is about 0.714, relatively low and without ascending over time. The efficiency of different provinces differing obviously, ones of Tianjin and Guangxi are high while Hebei and Jiangsu’s are low. Efficiency-influencing factors are analyzed with the Tobit model, revealing that technology extension convenience and technology level have positive influence, while training intensity factor has negative one. The species structure factor and regional factor have also been found to have significant impact on the efficiency.
      PubDate: 2017-03-09
      DOI: 10.1007/s10499-017-0131-4
  • Comparison of microsatellites and SNPs for pedigree analysis in the
           Pacific oyster Crassostrea gigas
    • Authors: Ting Liu; Qi Li; Lingfeng Kong; Hong Yu
      Abstract: Knowledge of the pedigree relationships between individuals is a prerequisite ‬in genetics research, and the application of molecular markers for pedigree analysis has been a booming science for over a decade. Owing to the high variability, microsatellites are considered as the marker of choice for studies on pedigree analysis. Nevertheless, single nucleotide polymorphisms (SNPs) have been increasingly used for this purpose in recent years due to the low mutation rate and genotyping error rate. To compare the utility of microsatellites and SNPs in assigning parentage in the Pacific oyster (Crassostrea gigas), we genotyped 384 parental and offspring individuals using 12 multiplexed microsatellites and 50 SNPs. In this study, all microsatellite loci showed high informative (PIC >0.5), while most SNPs were middle informative (0.25 <PIC <0.5). CERVUS simulations revealed that using nine microsatellites or 38 SNPs, the power of parental assignment could reach 100%. Pedigree analysis of real offspring demonstrated that 100% of the offspring were unambiguously assigned to a pair of parents when nine microsatellites or 50 SNPs were used. For microsatellites, the combined exclusion power with one parent known (EXCL2) could reach one when three microsatellites multiplex PCRs or more were used, whereas EXCL2 was 0.9999 for the 50 SNPs. In general, six SNPs were needed to obtain an equivalent exclusion power for pedigree analysis with a microsatellite locus in C. gigas. The information obtained in this study will be useful for assigning parentage in C. gigas using both marker systems.
      PubDate: 2017-03-09
      DOI: 10.1007/s10499-017-0127-0
  • Replacement of fish meal with corn gluten meal in feeds for Asian seabass
           ( Lates calcarifer )
    • Authors: Sambasivam Nandakumar; Kondusamy Ambasankar; Sajjad Syed Raffic Ali; Jagabatula Syamadayal; Kumaraguru Vasagam
      Abstract: A 45-day feeding trial was conducted to study the effect of replacing dietary fish meal (FM) with corn gluten meal (CGM) on diet digestibility and growth and proximate body composition of Asian seabass (Lates calcarifer) fingerlings (21.1 ± 0.95 g). Five isonitrogenous and isocaloric diets, formulated to contain 40% protein and 10% lipid, were prepared with fish meal replacement at 0 (control), 5, 10, 15, and 20% (w/w basis) using CGM. The trial was carried out in 1000-L fiber-reinforced polymer (FRP) tanks with three replicates (each containing 20 fish) for each treatment, and fish were hand fed in excess twice daily at 10.00 and 16.00 h. There was no significant difference in final body weight, average daily gain, and survival for fish fed the CGM0, CGM5, and CGM10 diets, with fish in these treatments performing better than the others. Feed conversion ratios for fish fed CGM0 (1.73 ± 0.05 g feed /g gain), CGM5 (1.65 ± 0.06 g feed g−1 gain), and CGM10 (1.84 ± 0.07 g feed g−1 gain) were better than for the other treatments. Protein retention (28.85 ± 0.65%) and energy retention (20.60 ± 0.39%) were better in the group fed with CGM5 than the other treatments. Apparent digestibility coefficients of dry matter (65.1 ± 0.3, 64.7 ± 0.2%), protein (91.6 ± 0.5, 91.7 ± 0.3%), and energy (79.0 ± 0.27, 8.4 ± 0.1%) were highest for the CGM5 and CGM10 diets. Highest crude lipid (7.29 ± 0.09%) and gross energy (7.19 ± 0.05 kJ g−1) were observed in fish fed the CGM 20 diet. The results indicate that CGM is a potential feed ingredient for seabass and can be included at 10% of the diet without compromising digestibility and growth.
      PubDate: 2017-03-08
      DOI: 10.1007/s10499-017-0133-2
  • Effect of temperature and nitrogen concentration on the growth and lipid
           content of Spirulina platensis and biodiesel production
    • Authors: Safak Seyhaneyildiz Can; Edis Koru; Semra Cirik
      Abstract: In this study, Spirulina platensis (Cyanophyceae) was cultured at five mediums with different amounts of sodium nitrate and three different temperatures. The study was conducted at 1600 lx light intensity and a pH value of 9. The influences of nitrate amounts and temperature on biomass growth and lipid amount were studied during 20 days. The best biomass growth (1.039 ± 0.668 g L−1 dry weight and 0.780 ± 0.501 optical density) for S. platensis was obtained from the group with the temperature value of 35 °C and 2.5 g L−1 of sodium nitrate. The highest lipid production (4.70 ± 0.067% dry weight) was in the nitrate-free medium at 15 °C. The best results for biomass growth and lipid production were obtained from the group at 35 °C and 1.25 g L−1 of sodium nitrate (P < 0.05). At the end of the study, it was determined that algal biomass increased with increasing the nitrate amount but the produced lipid by the algae decreased. Intensive production was performed in accordance with the culture conditions of the most productive groups and biodiesel was obtained from the algae. The density, viscosity, and flash point of the biodiesel were calculated as 0.78, 4.67, and 107 °C, respectively.
      PubDate: 2017-03-06
      DOI: 10.1007/s10499-017-0121-6
  • Economic profitability of tilapia farming in China
    • Authors: Yuan Yuan; Yongming Yuan; Yunyun Dai; Yunchong Gong
      Abstract: Tilapia is an internationally farmed trade species recommended by the United Nations Food and Agriculture Organization, which is promoted and farmed in more than 100 countries and regions. In China, tilapia culture is a promising aquaculture business and it occupies an important position in global tilapia culture. In this study, profitability analysis was used to analyze the production costs and economic benefits of different farming sizes among the main tilapia-producing areas of China. Sensitivity analysis was conducted to analyze the impact of uncertainty factors on net profit of tilapia farming. Details of the costs and benefits of tilapia culture in China could support financial planning by fish farmers. The economic profit indices measured in this study comprised the total profit, gross income, profit margin, and benefit-cost ratios. The results indicated that large farms has the highest cost and the highest cost-profit margin among the three categories, and the small farms has the lowest cost and profit margin, while the cost and profit margin of medium size are between the large and small sizes. Sensitivity analysis shows that the net profit of tilapia is very flexible to the change of price, feed, rent, and fixed cost, of which price elasticity was the highest, followed by the feed, rent, and fixed cost. According to the problems existing in the tilapia farming, some policy suggestions were put forward for sustainable tilapia culture.
      PubDate: 2017-03-03
      DOI: 10.1007/s10499-017-0111-8
  • Economic optimization of super-intensive biosecure recirculating shrimp
           production systems
    • Authors: Xia Zhou; Terry Hanson
      Abstract: Super-intensive, biosecure, recirculating shrimp production systems (SIBRSPS) have been developed to prevent disease outbreaks and improve profitability. To evaluate the economic viability for SIBRSPS, the Hanson-Posadas bioeconomic model was developed to conduct analysis of net present values (NPVs), internal rate of returns (IRRs), and payback periods. The objective of this study is to develop a profit maximization model, as an enhancement to the Hanson-Posadas bioeconomic model, to determine the optimal harvesting week, size, and batch number per year and evaluate the economic viability for the SIBRSPS. Biological growth and feed functions in the profit maximization model were estimated using data from experiments conducted at the Gulf Coast Research Laboratory (GCRL), Waddell Mariculture Center (WMC), and the Oceanic Institute (OI) during 2003 through 2006. Results found that Pacific white shrimp (Litopenaeus vannamei) growth and feed significantly (P < 0.01) responded to number of weeks farmed as quadratic concave function shapes in GCRL and WMC and as linear in OI. The optimal harvest week, size, and batch number per year are 12th–18th week, 18–21 g, and approximately three to four batches, respectively, depending on the location. The economic viability of SIBRSPS is questionable, with positive NPVs ($9.35, $2.27, and $0.36 million) experienced only in three (OI-14, WMC-9, and WMC-8, respectively) out of seven experiment scenarios. Profitability is dependent on economic factors including L. vannamei prices and establishment and maintenance costs of SIBRSPS as well as biological factors such as stocking density, initial puerulus (PL) size, growth rates, feed conversion rates, and survival rates.
      PubDate: 2017-03-02
      DOI: 10.1007/s10499-017-0129-y
  • Feminization strategies in crustacean aquaculture
    • Authors: Muzaffer Mustafa Harlıoğlu; Ardavan Farhadi
      Abstract: Crustacean aquaculture production has developed rapidly in recent years because there has been an increase in crustacean market demands in different regions of the world. The growth rate of the most cultured crustacean species depends on genders. Therefore, monosex crustacean aquaculture, all male or all female, is more suitable for achieving higher yields, with the ecological benefits of reducing the risk of cannibalism. In addition, feminization is also appropriate for increasing individual number in populations because males are able to copulate with more females. For this reason, sexual manipulations are important in crustacean reproduction units. This review focuses on the sex differentiation mechanism and the use of different strategies for feminization of economically important crustaceans. In this review, feminization strategies are divided into two main methods: direct feminization and indirect feminization (masculinization). Direct feminization includes (1) ablation of androgenic gland (AG), (2) silencing and suppression AG and androgenic gland hormones (AGHs), (3) hormone therapy (i.e., 17β-estradiol), and (4) polyploidy induction. This review also emphasizes how feminization is carried out for crustaceans belonging to the different sex determination systems (ZW or XY) by using indirect method. The intension of controlling sexual differentiation for crustaceans will continue to increase in the next a few years, either for basic research or for its utilization to crustacean aquaculture; hence, this review will be profitable for crustacean farmers and researches.
      PubDate: 2017-02-23
      DOI: 10.1007/s10499-017-0128-z
  • Effect of dietary supplementation of Agrimos® on growth performance, feed
           utilization and immunological parameters of Macrobrachium rosenbergii
    • Authors: Khaled Mohamed; Mohamed E. Megahed; Mervat A.M. Ali
      Abstract: The present study was conducted to investigate the impact of adding commercial feed additives Agrimos® (combined yeast, Saccharomyces cerevisiae mannan oligosaccharides, and β-glucan) in the diet of Macrobrachium rosenbergii during the juvenile stage on growth performance, feed utilization, and immunological parameters. Four hundred and fifty juveniles of average weight 2.2 ± 0.02 g were divided into five experimental groups with three replicates each. The experiment was conducted for 56 days. Five isocaloric and isonitrogenous diets were formulated to be contain 350 g kg−1 crude protein and 19.4 MJ GE; four diets contain different levels of Agrimos® (1.5, 2, 2.5, and 3 g kg−1) in addition to control diet without Agrimos®. Final body weight, weight gain, and specific growth rate of Agrimos® fed groups were significantly higher (p < 0.05) than the control group. Survival rate of the Agrimos® fed groups and control was not significantly different (p > 0.05). In addition, the feed conversion ratio and protein efficiency ratio in treatments supplemented by Agrimos® were significantly better (p < 0.05) than those fed the control diet. Concerning the influence of the Agrimos® on proximate composition of carcass, no significant differences (p > 0.05) were observed among different treatments. Increased immune response was observed in experimental groups with the 2.5 g kg−1 Agrimos® concentration yielding the significantly higher (p < 0.05) total hemocyte count and phenoloxidase. In conclusion, the additions of Agrimos® in the diet 3 at a concentration of 2.5 g kg−1 improved and enhanced the growth performance and feed utilization of M. rosenbergii juveniles.
      PubDate: 2017-02-22
      DOI: 10.1007/s10499-017-0123-4
  • Can bacterial biofiltration be replaced by autotrophic organisms in
           recirculating fresh water aquaculture?
    • Authors: Suvi Ojanen; Esa Tyystjärvi; Henrik Holmberg; Mikko Kouhia; Pekka Ahtila
      Abstract: In recirculating aquaculture, a bacterial biofilter is applied to convert ammonium, excreted by the fish, to the non-toxic nitrate. Unfortunately, nitrifying bacteria produce off-flavor compounds that lower fish quality. We investigated, by calculations and estimations, possibilities to replace the biofilter by autotrophic organisms that incorporate ammonium in biomass, consume other mineral nutrients and produce marketable biomass and oxygen. The capacity of microalgae, macroalgae, duckweed, strawberry, and tomato to assimilate ammonium was calculated, using data from an existing Finnish fresh water fish farm. Microalgae were found to be the most effective for ammonium removal, and they would be able to consume the ammonium produced by a fish farm if the algae were grown in a facility with approximately twice the area of the fish farm itself. Macroalgae and duckweed appeared to be the second best option for ammonium removal, and strawberry and tomato were predicted to have a somewhat smaller capacity for ammonium removal. Due to low ammonium content, microalgae cannot be cultivated in the recirculating water, but rather the nutrients should be allowed to diffuse through a semipermeable membrane to microalgae.
      PubDate: 2017-02-18
      DOI: 10.1007/s10499-017-0126-1
  • Effect of molasses addition at C:N ratio of 20:1 on the water quality and
           growth performance of giant freshwater prawn ( Macrobrachium rosenbergii )
    • Authors: Shuyan Miao; Longsheng Sun; Hongyi Bu; Jinyu Zhu; Guohong Chen
      Abstract: A 90-day experiment consisting of two groups, a biofloc treatment and a control treatment, was performed in six indoor cement ponds to investigate the effectiveness of biofloc technology (BFT) for maintaining water quality and growth performance of Macrobrachium rosenbergii in a zero-exchange water system. Molasses was added to the biofloc ponds with the C/N ratio of 20:1 based on the amount of daily feed. The floc volume in the biofloc group increased gradually (28.72 mL L−1) along with molasses addition, but the value in the relative control group remained at low levels (0.40–4.97 mL L−1) (P < 0.05). A total of 4.97% Bacillus, 4.20% Lactococcus, and 9.65% Nitrospira were determined in the biofloc water, and these values were significantly higher than that in the control water (P < 0.05). Ammonia-N, nitrite-N, nitrate-N, and total nitrogen concentrations in the biofloc water were significantly lower than that in the relative control group (P < 0.05). Potassium orthophosphate (PO4 −-P) and total phosphorous (TP) concentrations increased consistently in both groups. The same-day value of PO4 −-P concentration in the control group (6.37–12.96 mg L−1) was 1.5 higher than that of the biofloc group (4.66–7.99 mg L−1) from day 60 to day 90 (P < 0.05). Significant differences in TP concentration (P < 0.05) were noted between the control and biofloc groups from the 15th day to the 30th day and from the 60th day to the 90th day. The biofloc treatment resulted in a 10.62% higher survival rate, a 27.55% higher weight gain rate, and a 7.13% higher specific growth rate (P < 0.05). The findings of the present study demonstrated that BFT effectively promoted water quality, as well as growth and survival of M. rosenbergii, by regulating the inorganic nitrogen and phosphorus dynamics.
      PubDate: 2017-02-17
      DOI: 10.1007/s10499-017-0124-3
  • Immune modulation, disease resistance and growth performance of Indian
           farmed carp, Labeo rohita (Hamilton), in response to dietary consortium of
           putative lactic acid bacteria
    • Authors: Usha Jyoti Maji; Sriprakash Mohanty; Avinash Pradhan; Nikhil Kumar Maiti
      Abstract: Probiotic effect of a consortium of putative lactic acid bacteria on Labeo rohita was investigated with emphasis on growth performance, immune response, and disease resistance against Aeromonas hydrophila. Fish were fed either a lactic acid bacteria-supplemented diet or a control diet for a period of 30 days. At the end of the experiment, probiotic fed group showed a significant improvement in weight gain percentage, specific growth rate, and feed conversion ratio along with increased respiratory burst activity of blood phagocytes and serum antiprotease activity level. Quantitative real-time PCR showed significant upregulation of IL-10 gene in kidney, intestine, and liver of probiotic-treated group, whereas TNF-α gene was significantly upregulated only in liver and intestine. HSP70 gene was significantly upregulated in intestine but downregulated in liver on day 15. Challenge with Aeromonas hydrophila on day 30 of probiotic feeding showed a significant increase in survival percentage of treated (93.33 %) over the control group (33.33 %). Further challenge after 20 and 40 days of withdrawal of probiotic showed higher survival percentage (60 and 40 %, respectively) in withdrawn group compared to control although difference was statistically insignificant. The consortium of putative probionts may serve simultaneously as an immunomodulating feed additive useful for disease protection and growth enhancer in eco-friendly freshwater aquaculture practices. However, feeding at regular interval with probiotic supplemented diet is suggested for a prolonged immunity.
      PubDate: 2017-02-16
      DOI: 10.1007/s10499-017-0122-5
  • Seaweed aquaculture in Norway: recent industrial developments and future
    • Authors: Pierrick Stévant; Céline Rebours; Annelise Chapman
      Abstract: The use of cultivated seaweeds as a feedstock for multiple industrial applications has gained increasing interest in the Western World over the past decades. Norway has an extensive coastline and a well-established aquaculture sector offering suitable preconditions for developing large-scale cultivation of seaweed biomass both in monoculture and in Integrated Multi-Trophic Aquaculture (IMTA) systems. Recent efforts from research, industry and public authorities have been committed to develop a Norwegian bio-economy based on cultivated seaweed, focusing on cultivation and processing of the biomass. This review reports on the status of seaweed aquaculture in Norway, supported by production data collected since the delivery of the first commercial cultivation permits at sea in 2014. Although novel product developments are currently limited, future industrial perspectives based on cultivated biomass are being discussed. Upscaling from experimental cultivation schemes to commercial production requires a thorough assessment of the risks and benefits associated with seaweed aquaculture, as well as the development of a regulative framework adapted to this industry. Issues associated with upscaling the macroalgal production that needs to be addressed includes (i) genetic interactions between cultivated and wild crops, (ii) impacts of seaweed cultivation on surrounding ecosystems, (iii) epiphytes and diseases, (iv) area utilization and (v) threats from climate change. Addressing these issues and adapting production practices will ensure the environmental and economic sustainability of an emerging industry based on cultivated seaweed biomass in Norway.
      PubDate: 2017-02-04
      DOI: 10.1007/s10499-017-0120-7
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