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Showing 1 - 200 of 2345 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: 20, SJR: 1.192, h-index: 74)
AAPS PharmSciTech     Hybrid Journal   (Followers: 6, SJR: 0.718, h-index: 54)
Abdominal Imaging     Hybrid Journal   (Followers: 14, 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: 26, SJR: 0.378, h-index: 30)
Acoustical Physics     Hybrid Journal   (Followers: 10, SJR: 0.355, h-index: 20)
Acoustics Australia     Hybrid Journal  
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: 7, SJR: 1.818, h-index: 22)
Acta Informatica     Hybrid Journal   (Followers: 5, SJR: 0.524, h-index: 32)
Acta Mathematica     Hybrid Journal   (Followers: 11, 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: 19, SJR: 0.898, h-index: 52)
Acta Mechanica Sinica     Hybrid Journal   (Followers: 5, 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: 6, 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: 53, SJR: 1.113, h-index: 14)
Advances in Gerontology     Partially Free   (Followers: 9, 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: 5, 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: 9, 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: 7, 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: 19, 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: 6, 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: 3, SJR: 0.706, h-index: 19)
Akupunktur & Aurikulomedizin     Full-text available via subscription   (Followers: 1)
Algebra and Logic     Hybrid Journal   (Followers: 3, SJR: 0.566, h-index: 18)
Algebra Universalis     Hybrid Journal   (Followers: 2, SJR: 0.388, h-index: 22)
Algebras and Representation Theory     Hybrid Journal   (Followers: 1, 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: 4, 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: 7, 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: 21, SJR: 0.293, h-index: 13)
American Sociologist     Hybrid Journal   (Followers: 12, SJR: 0.18, h-index: 13)
Amino Acids     Hybrid Journal   (Followers: 7, 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: 28, 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: 16, 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: 12, 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: 28, 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: 14, 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 Ophthalmology     Hybrid Journal   (Followers: 9)
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: 10, 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: 8, 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: 44, 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: 47, 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: 12, 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: 7, SJR: 0.535, h-index: 121)
Applied Physics B: Lasers and Optics     Hybrid Journal   (Followers: 23, SJR: 0.983, h-index: 104)
Applied Psychophysiology and Biofeedback     Hybrid Journal   (Followers: 7, 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: 17, 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: 22, SJR: 0.613, h-index: 40)
Aquarium Sciences and Conservation     Hybrid Journal   (Followers: 1)
Aquatic Ecology     Hybrid Journal   (Followers: 30, 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   (Followers: 1, SJR: 0.597, h-index: 29)
Archival Science     Hybrid Journal   (Followers: 52, 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 and Museum Informatics     Hybrid Journal   (Followers: 120)
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: 17, 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: 5, 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: 5, SJR: 0.295, h-index: 18)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arkiv för Matematik     Hybrid Journal   (Followers: 1, SJR: 0.948, h-index: 22)
Arnold Mathematical J.     Hybrid Journal   (Followers: 1)
Arthropod-Plant Interactions     Hybrid Journal   (Followers: 1, SJR: 0.797, h-index: 17)
Arthroskopie     Hybrid Journal   (Followers: 1, SJR: 0.145, h-index: 8)
Artificial Intelligence and Law     Hybrid Journal   (Followers: 9, SJR: 0.288, h-index: 25)
Artificial Intelligence Review     Hybrid Journal   (Followers: 14, SJR: 0.948, h-index: 48)
Artificial Life and Robotics     Hybrid Journal   (Followers: 7, 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: 12, 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: 20, SJR: 0.58, h-index: 30)

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Journal Cover Aquaculture International
  [SJR: 0.613]   [H-I: 40]   [22 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  [2345 journals]
  • An overview of motile Aeromonas septicaemia management
    • Authors: Deyan Stratev; Olumide A. Odeyemi
      Pages: 1095 - 1105
      Abstract: Motile Aeromonas septicaemia is most commonly caused by Aeromonas hydrophila. It is an opportunistic pathogen causing disease in fish under stress. The bacterium produces a number of pathogenic factors, and the most important among them are the haemolysin and the aerolysin, provoking the disease. Freshwater and saltwater fish species are susceptible. The disease is manifested clinically with haemorrhages, ulcerations, abscesses, ascitic fluid and anaemia. Mortality rates are high, and they incur substantial economic losses, thereby necessitating timely measures of control for prevention and treatment. Therefore, the aim of this overview was to provide up-to-date information related to the control of motile Aeromonas septicaemia in fish through application of chemotherapeutic drugs, phytobiotics, probiotics, yeast extracts, vaccines and disinfectants.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-016-0100-3
      Issue No: Vol. 25, No. 3 (2017)
  • A molecular tool for parentage analysis in Indian major carp, Labeo rohita
           (Hamilton, 1822)
    • Authors: L. Sahoo; P. K. Meher; K. Das Mahapatra; J. N. Saha; P. Jayasankar; P. Das
      Pages: 1159 - 1166
      Abstract: Determination of genealogical relationship between broodstock and progeny is important to estimate selection response in aquaculture breeding programs. Currently, the application of microsatellite markers for parentage determination is gaining popularity in aquaculture. In the present study, 17 simple sequence repeat markers were evaluated for parentage assignment on rohu. The allele frequencies, exclusion probabilities and polymorphic information contents (PIC) were calculated using Cervus. The polymorphic information content values showed that most of the microsatellite markers were highly informative (PIC > 0.7). Based on the exclusion power, eight microsatellite markers were chosen for parentage assignment. The robustness of this suite was assessed in five full-sib and four half-sib families using two contrasting methods, a pair-wise likelihood comparison approach in Cervus and a full-pedigree likelihood method in the COLONY program. Using real data set, the correct matching rate was more than 98%, comparable to the simulated study (99.9%) in the case of Cervus 3.0 and 100% in the case of COLONY. The result of the present study implies that this set of microsatellites would be an effective tool for parentage and sibship identification, testing performance of families and estimating genetic parameters in the ongoing selective breeding program of rohu.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-016-0104-z
      Issue No: Vol. 25, No. 3 (2017)
  • Effect of dietary phytase on phosphorus use efficiency and dynamics in
    • Authors: Brunno da Silva Cerozi; Kevin Fitzsimmons
      Pages: 1227 - 1238
      Abstract: Phytase is a phosphatase enzyme used as dietary supplement when significant portions of plant-based ingredients are used in fish feed formulations. This work thus assessed the effects of a phytase-supplemented diet on the P dynamics, P availability, P budget, fish and plant growth parameters, and carcass composition of Nile tilapia and phosphorus content of lettuce plants in aquaponic systems. The diet supplemented with phytase at the concentration of 1000 FTU kg−1 showed a significant increase in released phosphorus compared to the control in an in vitro assay. Phytase supplementation increased accumulation of phosphorus in fish carcass compared to the control, but did not affect growth performance. The addition of phytase to fish diets improved phosphorus utilization by fish, reducing phosphorus excretion. The lower amount of phosphorus excreted in the water caused by phytase did not impair the growth or phosphorus content of lettuce grown using the aquaponic nutrient solution. It is recommended that, even though the use of phytase in fish feeds increased the overall utilization of phosphorus in the present study, a small portion of inorganic phosphorus must be supplemented to meet minimum fish requirements.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-016-0109-7
      Issue No: Vol. 25, No. 3 (2017)
  • Use of agar-bound microparticulate diet as alternative food for tropical
           abalone, Haliotis asinina (Linnaeus 1758) post-larvae in large-scale
    • Authors: MN Bautista-Teruel; JRH Maquirang; MR dela Peña; VT Balinas
      Pages: 1239 - 1252
      Abstract: The efficacy of using agar-bound microparticulate diet (A-MPD) as alternative food for abalone Haliotis asinina Linne post-larvae in large-scale culture was investigated. Larvae sourced from the hatchery-bred (HB) and wild-sourced (WS) broodstock were fed with either diatoms (TMT1-NF), agar-bound microparticulate diet (TMT2-A-MPD), or a combination of both feeds (TMT3-NF + A-MPD) in six 2-m3 tanks replicated over time. Three hundred thousand veliger larvae were stocked/tank containing 80 corrugated plates with mucus trails hanging on bamboo poles. Feeds were given at 0900 h starting at day 3 with seawater flow through introduced every 1400 h starting day 5. Two-way analysis of variance determined significant differences (p < 0.05) in survival and shell length between larval sources and feed types. Tukey’s post hoc test established differences among treatment means. At day 30, survival for HB- and WS-sourced larvae was significantly higher (42%) in TMT3 compared with TMT2 having 35% for HB and 38% for WS (p < 0.05). Larvae fed with TMT1 had significantly lowest survival among the three treatments. Survival at 60 and 90 days did not show significant difference for TMT2 and TMT3 regardless of broodstock source. Post-larval shell growth (90 days), from both sources fed with TMT2 and TMT3, was significantly higher than TMT1 (p < 0.05). Larval performance did not show any significant interactions between HB and WS broodstock. The use of A-MPD alone or in combination may elicit improvement in survival and shell length growth in abalone larvae regardless of larval sources. A-MPD may be used as full or partial replacements to diatoms as alternative food for abalone post-larvae in large-scale culture.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0110-9
      Issue No: Vol. 25, No. 3 (2017)
  • Economic profitability of tilapia farming in China
    • Authors: Yuan Yuan; Yongming Yuan; Yunyun Dai; Yunchong Gong
      Pages: 1253 - 1264
      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: 2017-06-01
      DOI: 10.1007/s10499-017-0111-8
      Issue No: Vol. 25, No. 3 (2017)
  • Influence of low molecular weight chitooligosaccharides on growth
           performance and non-specific immune response in Nile tilapia Oreochromis
    • Authors: Xiao Meng; Jiting Wang; Wenju Wan; Mengmeng Xu; Tingting Wang
      Pages: 1265 - 1277
      Abstract: A 50-day feeding trial was conducted to evaluate the effects of five different levels of low molecular weight chitooligosaccharides (LMW-COS) (0, 0.1, 0.2, 0.4, and 0.8 g kg−1) on growth performance, serum parameters, body composition, and non-specific immunity in Nile tilapia (Oreochromis niloticus). A total of 600 fish were divided into 5 treatments with 4 replicates of 30 fish per tank. The results showed that dietary supplementation with 0.4 or 0.8 g kg−1 COS significantly improved the final body weight, specific growth rate, feed efficiency rate, and protein efficiency ratio of fish (P < 0.05). The supplementation of COS did not significantly affect the content of blood albumin, globin, and glucose, but the trend of enhancing blood total protein and lowering cholesterol and triglyceride was observed with the gradient levels of COS. Immune responses assay showed that dietary supplementation with 0.4 or 0.8 g kg−1 COS significantly improved the phagocytic activity, serum bactericidal activity, and lysozyme activity in tilapia (P < 0.05); there were no significant differences between 0.4 and 0.8 g kg−1 of COS (P > 0.05). In one word, the supplementation of 0.4 and 0.8 g kg−1 COS significantly increased the growth performance and non-specific immunity of Nile tilapia; the recommended COS supplementation in diet is 0.4 g kg−1 diet.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0112-7
      Issue No: Vol. 25, No. 3 (2017)
  • Cultivation of green algae Platymonas helgolandica in rearing water
           enhances the growth performance and resistance of Litopenaeus vannamei
           against Vibrio parahaemolyticus infection
    • Authors: Hongxing Ge; Jian Li; Ping Chen; Zhiqiang Chang; Mingming Shen; Fazhen Zhao
      Pages: 1279 - 1290
      Abstract: Platymonas helgolandica Kylin var. tsingtaoensis, a unicellular free-swimming marine green alga, is widely distributed in certain areas of Asia and frequently used in larvae rearing in marine animal hatchery. To investigate the potential regulatory roles of P. helgolandica in white shrimp (Litopenaeus vannamei) culture, P. helgolandica was seeded in water for rearing white shrimp at three different doses of 1 × 104 (T1), 5 × 104 (T2) and 1 × 105 (T3) cell mL−1 and control without any microalgae for 40 days, and water quality, innate non-specific immune responses (including total hemocyte count (THC), phenoloxidase activity (PO), lysozyme (LSZ), and superoxide dismutase (SOD) activity), shrimp growth performance and shrimp survival rate under Vibrio parahaemolyticus exposure were examined. All the three treatments seeded with P. helgolandica showed a significant reduction of ammonia, nitrite and nitrate. Water pH in each tanks seeded with P. helgolandica tended to increase during the experiment, whereas water pH in the control tanks tended to fluctuate over time. Compared with the control group, final weight, average weight gain and feed conversion ratio (FCR) were significantly greater in T1, T2 andT3. The THCs of the T3 group were significantly higher than that of the control. SOD activities of the shrimp in T2 and T3 groups were significant higher than those of the shrimp in the control. The PO activity of the T3 group was significantly higher than those of the control and the T1 group. On day 10, the survival rate (percent) of L. vannamei under V. parahaemlyticus exposure were 66.67, 81.11 and 91.11% in T1, T2 and T3 respectively, whereas, it was 43.33% in the positive control. These results suggest that seeded P. helgolandica in the rearing water of white shrimp confers positive effects for shrimp aquaculture, considering water quality, growth performance, innate non-specific immune responses and disease resistance. Among the three doses of P. helgolandica, 1 × 105 cell mL−1 had the best effect on shrimp growth performance and resistance against V. parahaemolyticus infection.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0113-6
      Issue No: Vol. 25, No. 3 (2017)
  • Evaluation of different hydroponic media for mint ( Mentha arvensis ) with
           common carp ( Cyprinus carpio ) juveniles in an aquaponic system
    • Authors: A.P. Shete; A.K. Verma; N. K. Chadha; Chandra Prakash; M.H. Chandrakant; K. K. T. Nuwansi
      Pages: 1291 - 1301
      Abstract: Three hydroponic media crushed stones (T1), river stones (T2), and floating raft (T3) were compared in an aquaponic system with common carp (Cyprinus carpio) and mint (Mentha arvensis). Fish effluents were used as plant nutrients while plants filtered water by stripping off the nutrients before returning to the fish tank. Fish growth, plant growth, and water quality parameters were used to evaluate the suitability of three different media. Growth performance of common carp and mint followed the relationship of crushed stones > floating raft > river stones with significant difference observed among all treatments. Total ammonia nitrogen (TAN) removal varied significantly among different treatments. The maximum TAN removal was observed in T1 (77.13%) followed by T3 (69.65%), and the minimum removal was observed in T2 (48.82%). Nitrate removal varied significantly among different treatments. The highest removal was observed in T1 (82.95%) followed by T3 (68.04%) and T2 (59.51%). Removal of phosphate was significantly lower in T2 (50.12%) when compared to T1 (67.85%) and T3 (70.71%). Biofilter performance (g m−3 day−1) of T2 (4.80) was significantly lower compared to T1 (7.13) and T3 (7.37). Crushed stone and floating raft were significantly efficient when compared to river stone medium in terms of nutrient removal and water quality maintenance for the fish culture. Considering all growth parameters, crushed stone media proved to be better when compared to other two media. Thus, medium selection could be a considerable factor when designing an aquaponic system.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0114-5
      Issue No: Vol. 25, No. 3 (2017)
  • Effects of Astragalus polysaccharides on antioxidant abilities and
           non-specific immune responses of Chinese mitten crab, Eriocheir sinensis
    • Authors: Longlong Fu; Gang Zhou; Jianlin Pan; Yuehua Li; Quanping Lu; Jun Zhou; Xuguang Li
      Pages: 1333 - 1343
      Abstract: This study assessed the effects of Astragalus polysaccharides (APS) on antioxidant abilities, non-specific immune responses, and immune protective efficacy (attacked by Aeromonas hydrophila) of Eriocheir sinensis, the most important Chinese freshwater crabs. A total of 720 crabs (initial mean weight 10.27 ± 1.58 g) were fed 60 days with six kinds of experimental diets containing graded dosages of APS (0, 300, 600, 900, 1200, 1500 mg/kg diets) in 18 outdoor cement tanks. The results showed that superoxide dismutase (SOD), catalase (CAT), total antioxidant capacity (T-AOC), lysozyme (LZM), and phenoloxidase (PO) activities of serum significantly increased (P < 0.05) with increasing APS dosages (0–900 mg/kg diets), but alkaline phosphatase (AKP) and acid phosphatase (ACP) activities of serum did not significantly changed (P > 0.05); SOD, CAT, T-AOC, LZM, AKP, and ACP activities of hepatopancreas significantly increased (P < 0.05) with increasing APS dosages (0–1200 mg/kg diets); the increased maximal multiples of LZM and PO activities were higher than SOD, CAT, and T-AOC which increased. The results of A. hydrophila attack test showed that mortality rates significantly decreased (P < 0.05) with increasing APS dosages (0–600 mg/kg diets), and the highest immune protective rate was 49.4%. In short, APS could help E. sinensis to improve immune responses and may reduce the risk of disease attacks as one kind of effective immunopotentiator in diets, and the best additive dosage was 1200 mg/kg.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0117-2
      Issue No: Vol. 25, No. 3 (2017)
  • Analysis of monthly variation of biological conditions, metabolic
           parameters and antioxidative capacities in sea-based farmed Pacific
           abalone during summer days
    • Authors: Siheng Lin; Fucun Wu; Guofan Zhang
      Pages: 1345 - 1359
      Abstract: Pacific abalone, Haliotis discus hannai, has become the predominant farmed abalone species in Fujian, southern China, since 2006. As an introduced abalone species from northern China, mass mortality of the farmed Pacific abalones in Fujian often occurred during summer in recent years. However, this phenomenon of summer mortality still lacks thorough investigation. We conducted a field investigation to monitor biological conditions of the 2-year-old animals, including monthly survival rates; visual gonad index; monthly variation in metabolic parameters including protein, glycogen, and nonesterified fatty acid (NEFA) content; and enzyme activities of lactate dehydrogenase (LDH) and antioxidative capacities including superoxide dismutase (SOD) and total antioxidative capacity (T-AOC) from April to October 2014. A range of environmental parameters were assessed and correlated against biological indicators for abalone conditions, metabolic parameters, and antioxidative capacities. Results showed a total mortality rate of 58.58% over the sampled period. Visual gonad index assessment showed that the sampled animals had similar gonad development levels during each sampling date. Environmental parameters and abalone mortality monitored during the study showed significant positive correlation between seawater temperature and mortality of abalones. All energy resources tended to be depleted at the end of summer. Results also showed that both SOD and T-AOC increased in the first few months and then decreased in September and October. The variations of metabolic parameters and antioxidative capacities indicated an insufficient energy supply and peroxidative damage in the farmed animals during summer. This study provided the biological data of farmed Pacific abalone by field investigation in terms of summer mortality for the first time in southern China. These findings that might be applicable to the management and development of Pacific abalone aquaculture in sea-based farms of southern China were also discussed in the study.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0118-1
      Issue No: Vol. 25, No. 3 (2017)
  • Effects of different feeding rates of extruded and pelleted feeds on
           growth and nutrient retention in channel catfish ( Ictalurus punctatus )
    • Authors: Huaibing Xu; Xiaoqin Li; Wentong Sun; Jianan Chen; Qipin Gao; Ke Shuai; Xiangjun Leng
      Pages: 1361 - 1372
      Abstract: Extruded and pelleted feeds were fed with different amounts (100, 90, 80, and 70% of satiation) to channel catfish (42 g initial weight) and the effects on growth, nutrient retention, and serum biochemistry were examined. The two feeds were designed with the same formula (containing 308 g kg−1 crude protein and 53 g kg−1 crude lipid), and were fed to eight treatments of fish (pelleted feed with a satiation of 100, 90, 80, 70% and extruded feed with a satiation of 100, 90, 80, 70%) with triplicate cage per treatment (20 fish per cage) for 10 weeks. The results indicated that weight gain (WG) of the eight groups were 371.1, 328.1, 302.1, 281.1 and 370.5, 334.0, 311.0, 285.3%, respectively. The fish fed extruded and pelleted feed at the same feeding rate showed no significant differences in growth performance, whole-body composition, and nutrient retention (P > 0.05). In both extruded and pelleted feeds, WG, feed conversion ratio (FCR), intraperitoneal fat ratio (IFR), whole-body lipid content, lipid retention (LR), and serum triglyceride (TG) content decreased (P < 0.05), but protein retention (PR) increased from 35.3 to 39.4% in pelleted feeds and from 35.9 to 39.7% in extruded feeds with the decrease of feeding rate from satiation (100%) to 70% of satiation (P < 0.05). The above results demonstrated that channel catfish fed extruded feed had the similar growth to that fed pelleted feed with the same formula. The utilization of protein and feed could be improved by the reduced feeding rate from satiation (100%) to 70% of satiation.
      PubDate: 2017-06-01
      DOI: 10.1007/s10499-017-0119-0
      Issue No: Vol. 25, No. 3 (2017)
  • Supplying rapeseed meal to the diets with or without potassium iodide for
           yellow catfish ( Tachysurus fulvidraco )
    • Abstract: The aims of the study were (1) to determine the effect of rapeseed meal on growth, body composition, thyroid hormones, and expressions of three genes involved in thyroid function and (2) to determine if potassium iodide in the diet counteracts the adverse effect caused by rapeseed meal on growth. One fish meal-based diet was serviced as the control. The other six diets were designed on the basis of 3 × 2 factorial design. The rapeseed meal inclusion (10, 20, and 30%) and potassium iodide inclusion (0 and 72 mg (kg)−1) were set to be two factors. The fish experiment was designed according to a randomized block model with three size groups of fish (27.7, 19.9, and 8.1 g). The feeding period lasted for 71 days. The results showed that final weight, weight gain, specific growth rate (SGR), and feed conversion ratio (FCR) of fish fed with 10% rapeseed meal-based diets were significantly better than those fed with 20 and 30% rapeseed meal. The highest nitrogen retention and protein efficiency ratio (PER) were in the 10% rapeseed group. Inclusion of 30% rapeseed meal in the diets significantly reduced whole-fish dry matter, Ile, and Phe contents. The gene expressions of the thyrotropin receptor (TSHR), sodium/iodide symporter (NIS), and thyroid peroxidase (TPO), as well as the thyroid hormone (T3 and T4) levels in the plasma, were not affected by the different diets. However, TSHR and TPO gene expressions negatively correlated with T4 and lipid retention. NIS gene expression positively correlated with cumulative feed intake, final weight, weight gain, SGR, nitrogen retention, and PER. It also negatively correlated with FCR. In conclusion, the rapeseed meal inclusion level in the diet was suggested to be 10%. Potassium iodide in the diet (72 mg (kg)−1) did not counteract the adverse effects caused by rapeseed meal on fish growth. Correlations provided evidence to support the link between NIS gene and fish growth.
      PubDate: 2017-06-26
  • Recombinant vaccine protects juvenile hybrid grouper, Epinephelus
           fuscoguttatus × Epinephelus lanceolatus , against infection by Vibrio
    • Abstract: Vibrio alginolyticus has been recognized as one of the most significant bacterial diseases in grouper species. In this study, two outer membrane proteins of V. alginolyticus, the OmpK and OmpW, were considered for vaccine development, since both OmpK and OmpW were proven by previous studies to be promising vaccine candidates. Recombinant vaccines were constructed by cloning the OmpK and OmpW genes of V. alginolyticus into pET32 Ek/LIC vector and expressed in Escherichia coli. Fish were immunized with inactivated E. coli expressing the OMPs. Juvenile hybrid groupers, Epinephelus fuscoguttatus × Epinephelus lanceolatus, were divided into five groups of 150 fish per group. Group 1 was vaccinated IP with rOmpK while group 2 with rOmpW; group 3 was vaccinated with host E. coli BL21(DE3), group 4 with phosphate-buffered saline (PBS) only, and group 5 was the environmental control group. Each vaccination was carried out with 0.5 mL fish−1 vaccine and at 28 °C water temperature. Booster dose of respective vaccine was delivered on day 14, and all groups were challenged with 109 CFU mL−1 of live V. alginolyticus using intraperitoneal (IP) injection at 0.5 mL fish−1 on day 28. The relative percentage survival (RPS) was highest for rOmpK group at 100%, followed by rOmpW group at 63%, and E. coli BL21(DE3) group at 0%. The IgM antibody specific to V. alginolyticus was detected in the serum, in which both rOmpK and rOmpW vaccinated groups showed an increasing pattern in antibody level following vaccinations. The IgM against rOmpK showed significantly (p < 0.05) higher OD values than rOmpW at challenge on day 28 post vaccination. The results of this study suggest that rOmpK succeeded in providing excellent protection while the rOmpW succeeded in providing partial protection against infection by V. alginolyticus.
      PubDate: 2017-06-22
  • Effect of commercial probiotics ( Bacillus subtilis and Saccharomyces
           cerevisiae ) on growth performance, body composition, hematology
           parameters, and disease resistance against Streptococcus agalactiae in
           tambaqui ( Colossoma macropomum )
    • Abstract: The use of feed additives as probiotics in aquaculture is increasing, but it is still poorly understood. Our aim was to evaluate the effect of two probiotics (Bacillus subtilis 10 9 UFC/g and Saccharomyces cerevisiae 10 9 UFC/g) on growth parameters, body composition, and hematological responses of tambaqui juveniles (Colossoma macropomum) by considering time a key factor for the probiotics-pathogens interaction. The first phase studied 108 animals (2.13 ± 0.75 g) randomly distributed into 12 tanks. Weight, consumption, feed conversion, weight gain, survival, and body composition were evaluated after 90 days. The second phase studied 60 animals (175.01 ± 36.73 g) fed with the same experimental diets. After 60 days, fish were induced with bacteria Streptococcus agalactiae strains (1.0 × 10−5 UFC) and subjected to blood collection (0, 12, 24, 48, and 72 h). In short, no differences were observed for performance and body composition. Mortality was not observed for phase 1 and 2, and it is expected due to purposeful protocol of moderate infection. However, improvements of hematological parameters (red and white series) were noted in the tambaqui supplemented with commercial S. cerevisiae when considering exposure time.
      PubDate: 2017-06-21
  • Ceratomyxosis infection in cultured striped red mullet ( Mullus surmuletus
           Linnaeus 1786) broodstock
    • Authors: L. Barreiro; R. Caamaño; S. Cabaleiro; M. V. Ruiz de Ocenda; F. Villoch
      Abstract: Striped red mullet is a commercial valuable species for fisheries. Due to its economic importance, captivity studies were carried out to check the suitability of this species to culture conditions. In order to improve it, a wild-caught broodstock was created and kept in captivity for 4 years. Mullets were very susceptible to handling stress resulting in a high mortality during capture and quarantine stage (45.8%). Once they moved to long-term facilities, they showed good food acceptance and gregarious behaviour, but mortality never disappear. Total survival was 15.86%. Some fish were asymptomatic, but most of them had an extreme weight loss with severe emaciation and cachexia. The histopathological study showed presence of Myxozoa Ceratomyxa sp. parasite in most of the dead fish (>70%). Ceratomyxa sp. was detected in gallbladder, intestine and kidney. The presence of trematodes, nematodes and annelids was occasional, showing lower parasite diversity and prevalence than in natural conditions. This might be due to the pathogen-free diet that can cause a host-parasite imbalance by inducing other parasitic infections. In addition, culture conditions might reduce the immune response and favour ceratomyxosis due to the easily stressed nature of striped red mullet.
      PubDate: 2017-06-14
      DOI: 10.1007/s10499-017-0166-6
  • Effects on lipid metabolism and expression of PPARα and FABP of
           Schizothorax prenanti by oxidized Konjac glucomannan
    • Authors: Liao Zhang; Yinglong Wu; Ping Si; Yongfeng Yan; Huailiang Xu; Yongfang Yao
      Abstract: Prenant’s schizothoracin (Schizothorax prenanti) is an important existemic commercial fish in Yangtze River. Oxidized Konjac glucomannan (OKGM) is a kind of polysaccharide oxidative produced by degradation of KGM. A total of 500, 1000, 2000, 4000, and 8000 mg/kg OKGM were separately added to diets of S. prenanti. After 60 days of feeding trial, examinations were performed to determine activities of hepatic lipase (HL) lipoprotein lipase (LPL), contents of triglyceride (TG), total cholesterol (TC), high-density lipoprotein (HDL), low-density lipoprotein (LDL) in serum, relative expressions of peroxisome proliferator activated receptor-α (PPARα) and fatty-acid-binding proteins (FABPs) of in muscle and hepatopancreas, lipids in fish meat, and fatty acids in lipids. Results showed that addition of 8000 mg/kg OKGM to diets of S. prenanti resulted in significantly higher activities of HL and LPL; significantly lower contents of TG, TC, and LDL; and significantly higher amounts of HDL (P < 0.05). Relative expressions of PPARα were significantly higher in hepatopancreas and back muscle. Fish meat contained significantly lower lipid contents, significantly higher levels of unsaturated fatty acids, and significantly lower amounts of saturated fatty acids (P < 0.05). Total contents of eicosapentaenoic acid, docosahexaenoic acid, and linolenic acid were significantly higher (P < 0.05). Lipids in muscles were significantly less than those of the control group (P < 0.05). Therefore, addition of OKGM to diets of S. prenanti affected lipid metabolism, and a significant effect was attained when the dose reached 8000 mg/kg.
      PubDate: 2017-06-10
      DOI: 10.1007/s10499-017-0168-4
  • High genetic diversity and differentiation in three red tilapia stocks
           revealed by microsatellite DNA marker analysis
    • Authors: W.B. Zhu; H. Yang; X.H. Yuan; Z.J. Dong; J.J. Fu; L.M. Wang; S.Y. Su; N. Liu; F.B. Song; X.T. Chen
      Abstract: Red tilapia is thought to be the result of mutant-colored female Mozambique tilapias mating with male Nile, blue, or Zanzibar tilapias and cultured widely in Asia and central and South America. However, there is limited information about its genetic diversity and stock structure. In this study, we investigated the genetic variability of red tilapia stocks to provide fundamental knowledge for genetic improvement by molecular-marker-assisted selective breeding programs. Individuals (n = 180) from three stocks (Chinese Taiwan, Israel, and Malaysia) of red tilapia were genotyped based on 14 microsatellite markers. The results showed that all microsatellite loci were detected with high levels of polymorphism, with a mean number of 14.87 ± 3.85 alleles per locus in all stocks. Taiwan and Israel stocks showed higher heterozygosity than did the Malaysia stock. The F-statistic analysis showed that there was no significant genetic differentiation between the Taiwan and Israel stocks (P > 0.05), whereas there was highly significant genetic divergence in the other pairwise stocks (P < 0.01), suggesting that Taiwan and Israel stocks could be regarded as a single genetic group distinct from Malaysia stock. This result was in accordance with the UPGMA dendrogram based on Nei’s genetic distances of three stocks. The analysis of molecular variances (AMOVAs) revealed highly significant genetic variation among three stocks (P < 0.01) and accounted for 8.68% of the total variance. The results reported above were confirmed by Bayesian analysis in genetic structure simulation, which indicated a distinct genetic difference between Taiwan and Israel stocks compared with Malaysia stock.
      PubDate: 2017-06-10
      DOI: 10.1007/s10499-017-0150-1
  • Dietary effects of garlic powder ( Allium sativum ) on growth, blood
           indices, carcass composition, and lysozyme activity in brown trout ( Salmo
           caspius ) and resistance against Yersinia ruckeri infection
    • Authors: Azadeh Zaefarian; Sakineh Yeganeh; Batoul Adhami
      Abstract: In this research, dietary effect of garlic powder on growth parameters, carcass composition, some blood indices, and disease resistance against Yersinia ruckeri was studied in brown trout (Salmo caspius). Two hundred forty juvenile brown trout with mean initial weight of 19.94 ± 1.10 g were divided into 12 tanks (20 juveniles per each tank). Treatments prepared based on different levels of garlic led to four experimental diets including 0 (control), 10, 20, and 30 g/kg garlic powder and were used for 6 weeks. Fish fed 20 g/kg garlic had higher value (P < 0.05) of body weight increasing and specific growth rate than those with other experimental diets. Addition of 30 g/kg garlic led to significant increase in body protein while body fat decreased numerically in 30 g/kg garlic when compared to control diet. Results of blood factors showed that Hb, Hct, WBC, RBC, MCV, MCH, and MCHC did not change by addition of garlic (P > 0.05). Lysozyme activity was improved by increasing the level of garlic in diet (30 g/kg); meanwhile, the use of 20 g/kg garlic caused the highest total protein value. Fish fed diet containing garlic showed higher survival rate against Y. ruckeri than that of control fish. Garlic powder is severely advised according to these results of improving growth, serum factors, and resistance against Y. ruckeri.
      PubDate: 2017-06-08
      DOI: 10.1007/s10499-017-0169-3
  • Effects of clam dredging on benthic ecology of two cultivated northern
           quahog beds with different harvest histories and sediment grain sizes
    • Authors: Renee Mercaldo-Allen; Shannon Meseck; Ronald Goldberg; Paul Clark; Catherine Kuropat; Julie M. Rose
      Abstract: In Connecticut, cultivation of the northern quahog, or hard clam, Mercenaria mercenaria L., relies on hydraulic dredging. After harvesting, leased shellfish beds remain fallow for varying durations to facilitate natural reseeding and to allow small clams to reach harvestable size. The interval between dredging events, or harvest history, may influence benthic ecology and response of communities to further dredging. Two clam beds with different harvest histories, located near Milford, Connecticut, were studied from July through October 2012. These leased beds, fallowed for 3 and 8 years, respectively, were subdivided into two plots. One plot on each bed was commercially harvested in July while the other remained not dredged. Sediment sampling was conducted on alternate weeks using Smith MacIntyre grabs and sediment cores to compare ecology of benthic communities and chemistry of marine sediments on newly dredged and not dredged plots within leases. Main effects of lease (harvest history), dredging treatment (dredged versus not dredged plots), mean sediment phi size (ɸ), and season (sampling date) significantly affected benthic community structure. Newly settled bivalves, including early successional pioneer species, occurred in high abundance on 3-year beds. Diversity, evenness, and number of species were high on the 8-year beds, while abundance of individuals was low, more typical of later successional equilibrium communities. Differences among a subset of species on the 8-year beds were observed between dredged and not dredged plots while no community differences were observed between dredging treatments on 3-year beds. Significantly more individuals were observed on dredged versus not dredged plots on the 8-year beds only. Our results suggest that harvest frequency and/or sediment ɸ size may explain differences in benthic assemblages between leased areas with different dredging histories, while dredging had no measurable effect on sediment chemistry.
      PubDate: 2017-06-06
      DOI: 10.1007/s10499-017-0167-5
  • The use of biofilm and different feeding rates in biofloc culture system:
           the effects in shrimp growth parameters
    • Authors: Gabriele Lara; Marcelo Honda; Luís Poersch; Wilson Wasielesky
      Abstract: This study evaluated the use of biofilm in a Litopenaeus vannamei biofloc system using different feeding rates. Shrimp juveniles (0.89 ± 0.35 g) were stocked at 300 shrimp m−3 in 24,150-L tanks. The feeding rates were calculated by considering an expected weekly growth of 1 g week−1 and an estimated weekly mortality of 0.5%. Each treatment corresponded to a different feeding rate, and each feeding rate corresponded to a fixed food conversion ratio. Thus, the treatments tested were as follows: T0 and T0+B (without addition of artificial food, with and without biofilm addition, respectively); T0.6 and T0.6+B; T1.2 and T1.2+B; and T1.8 and T1.8+B. The study lasted 42 days. At the end of the study, shrimp that were grown with no artificial food presented lower final weights and minor survival, independent of the addition of biofilm. The T1.2+B treatment did not differ significantly from the T1.2, T1.8, and T1.8+B treatments for the growth and feeding parameters. The survivals were higher than 91% in all of the feed treatments, and no significant differences were detected among these treatments. In contrast, the results allowed the conclusion that the presence of biofilm in the T1.2+B treatment represented a feed saving of 35% of the total amount of artificial food offered. This could represent a significant value in the cost of operation and may make the biofloc technology (BFT) system more cost-effective and environmentally friendly. The use of BFT in conjunction with biofilm can benefit shrimp farming by reducing the amount of feed supplied.
      PubDate: 2017-06-03
      DOI: 10.1007/s10499-017-0151-0
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