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  Subjects -> BIOLOGY (Total: 3308 journals)
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BIOLOGY (1576 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 29)
Achievements in the Life Sciences     Open Access   (Followers: 7)
ACS Pharmacology & Translational Science     Hybrid Journal   (Followers: 1)
ACS Synthetic Biology     Hybrid Journal   (Followers: 25)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 4)
Acta Biologica Sibirica     Open Access   (Followers: 2)
Acta Biologica Turcica     Open Access  
Acta Biologica Venezuelica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 29)
Acta Biotheoretica     Hybrid Journal   (Followers: 4)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Fytotechnica et Zootechnica     Open Access   (Followers: 1)
Acta Limnologica Brasiliensia     Open Access   (Followers: 4)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales     Open Access   (Followers: 1)
Acta Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 11)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access   (Followers: 1)
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 8)
Advanced Journal of Graduate Research     Open Access  
Advanced Nonlinear Studies     Hybrid Journal  
Advanced Studies in Biology     Open Access  
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Bioinformatics     Open Access   (Followers: 20)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 12)
Advances in Cell Biology/ Medical Journal of Cell Biology     Open Access   (Followers: 30)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 14)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 13)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 7)
Advances in Ecological Research     Full-text available via subscription   (Followers: 44)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 17)
Advances in Enzyme Research     Open Access   (Followers: 11)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 8)
Advances in Genome Biology     Full-text available via subscription   (Followers: 11)
Advances in High Energy Physics     Open Access   (Followers: 22)
Advances in Human Biology     Open Access   (Followers: 4)
Advances in Life Science and Technology     Open Access   (Followers: 18)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 21)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 25)
Advances in Organ Biology     Full-text available via subscription   (Followers: 2)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 2)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 6)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
Advances in Tropical Biodiversity and Environmental Sciences     Open Access   (Followers: 1)
Advances in Virus Research     Full-text available via subscription   (Followers: 6)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 8)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 2)
Ageing Research Reviews     Hybrid Journal   (Followers: 12)
Aging Cell     Open Access   (Followers: 25)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Hybrid Journal   (Followers: 18)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 24)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 2)
Alces : A Journal Devoted to the Biology and Management of Moose     Open Access  
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 9)
American Journal of Bioethics     Hybrid Journal   (Followers: 14)
American Journal of Human Biology     Hybrid Journal   (Followers: 16)
American Journal of Medical and Biological Research     Open Access   (Followers: 10)
American Journal of Plant Sciences     Open Access   (Followers: 20)
American Journal of Primatology     Hybrid Journal   (Followers: 17)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 80)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anadol University Journal of Science and Technology B : Theoritical Sciences     Open Access  
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access   (Followers: 2)
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 12)
Anatomical Science International     Hybrid Journal   (Followers: 3)
Animal Cells and Systems     Hybrid Journal   (Followers: 5)
Animal Models and Experimental Medicine     Open Access  
Annales de Limnologie - International Journal of Limnology     Hybrid Journal   (Followers: 1)
Annales françaises d'Oto-rhino-laryngologie et de Pathologie Cervico-faciale     Full-text available via subscription   (Followers: 3)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales Universitatis Mariae Curie-Sklodowska, sectio C – Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 19)
Annals of Human Biology     Hybrid Journal   (Followers: 5)
Annals of Science and Technology     Open Access  
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 14)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 25)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 3)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 39)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 15)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 25)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 13)
Anthropological Review     Open Access   (Followers: 24)
Antibiotics     Open Access   (Followers: 9)
Antioxidants     Open Access   (Followers: 5)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 9)
Antonie van Leeuwenhoek     Hybrid Journal   (Followers: 5)
Anzeiger für Schädlingskunde     Hybrid Journal   (Followers: 1)
Apidologie     Hybrid Journal   (Followers: 4)
Apmis     Hybrid Journal   (Followers: 1)
APOPTOSIS     Hybrid Journal   (Followers: 9)
Applied Biology     Open Access   (Followers: 1)
Applied Bionics and Biomechanics     Open Access   (Followers: 7)
Applied Vegetation Science     Full-text available via subscription   (Followers: 10)
Aquaculture Environment Interactions     Open Access   (Followers: 4)
Aquaculture International     Hybrid Journal   (Followers: 26)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 7)
Aquatic Biology     Open Access   (Followers: 6)
Aquatic Ecology     Hybrid Journal   (Followers: 37)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 15)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 23)
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 3)
Archives of Biological Sciences     Open Access  
Archives of Microbiology     Hybrid Journal   (Followers: 9)
Archives of Natural History     Hybrid Journal   (Followers: 8)
Archives of Oral Biology     Hybrid Journal   (Followers: 3)
Archives of Virology     Hybrid Journal   (Followers: 5)
Archivum Immunologiae et Therapiae Experimentalis     Hybrid Journal   (Followers: 2)
Arid Ecosystems     Hybrid Journal   (Followers: 3)
Arquivos do Instituto Biológico     Open Access   (Followers: 1)
Arquivos do Museu Dinâmico Interdisciplinar     Open Access  
Arthropod Structure & Development     Hybrid Journal   (Followers: 2)
Arthropods     Open Access   (Followers: 1)
Artificial DNA: PNA & XNA     Hybrid Journal   (Followers: 3)
Asian Bioethics Review     Full-text available via subscription   (Followers: 3)
Asian Journal of Biodiversity     Open Access   (Followers: 5)
Asian Journal of Biological Sciences     Open Access   (Followers: 3)
Asian Journal of Cell Biology     Open Access   (Followers: 5)
Asian Journal of Developmental Biology     Open Access   (Followers: 2)
Asian Journal of Medical and Biological Research     Open Access   (Followers: 4)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 4)
Atti della Accademia Peloritana dei Pericolanti - Classe di Scienze Medico-Biologiche     Open Access  
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 7)
Autophagy     Hybrid Journal   (Followers: 4)
Avian Biology Research     Full-text available via subscription   (Followers: 5)
Avian Conservation and Ecology     Open Access   (Followers: 13)
Bacteriology Journal     Open Access   (Followers: 1)
Bacteriophage     Full-text available via subscription   (Followers: 3)
Bangladesh Journal of Bioethics     Open Access  
Bangladesh Journal of Plant Taxonomy     Open Access  
Bangladesh Journal of Scientific Research     Open Access   (Followers: 1)
Batman Üniversitesi Yaşam Bilimleri Dergisi     Open Access  
Berita Biologi     Open Access   (Followers: 1)
Between the Species     Open Access   (Followers: 1)
Bio Tribune Magazine     Hybrid Journal  
BIO Web of Conferences     Open Access  
BIO-Complexity     Open Access  
Bio-Grafía. Escritos sobre la Biología y su enseñanza     Open Access  
Bio-Lectura     Open Access  
Bioanalytical Reviews     Hybrid Journal   (Followers: 2)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 6)
BioCentury Innovations     Full-text available via subscription   (Followers: 1)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 16)
Biochimie     Hybrid Journal   (Followers: 6)
BioControl     Hybrid Journal   (Followers: 6)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 8)
Biodemography and Social Biology     Hybrid Journal  
BioDiscovery     Open Access   (Followers: 2)
Biodiversidade e Conservação Marinha : Revista CEPSUL     Open Access  
Biodiversitas : Journal of Biological Diversity     Open Access  
Biodiversity Data Journal     Open Access   (Followers: 4)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     Open Access   (Followers: 2)
Biodiversity: Research and Conservation     Open Access   (Followers: 26)
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 2)
Bioenergy Research     Hybrid Journal   (Followers: 3)
Bioengineering and Bioscience     Open Access   (Followers: 2)
BioEssays     Hybrid Journal   (Followers: 11)
Bioethics     Hybrid Journal   (Followers: 16)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 5)
Biofilms     Full-text available via subscription   (Followers: 1)
Biogeosciences (BG)     Open Access   (Followers: 11)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 3)
Bioinformatics     Hybrid Journal   (Followers: 378)
Bioinformatics and Biology Insights     Open Access   (Followers: 12)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 7)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
BioLink : Jurnal Biologi Lingkungan, Industri, Kesehatan     Open Access   (Followers: 1)
Biologia     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 6)
Biological Control     Hybrid Journal   (Followers: 8)
Biological Invasions     Hybrid Journal   (Followers: 24)

        1 2 3 4 5 6 7 8 | Last

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Aquaculture Reports
Journal Prestige (SJR): 0.618
Citation Impact (citeScore): 2
Number of Followers: 3  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2352-5134
Published by Elsevier Homepage  [3181 journals]
  • Developmental pliability in zebrafish: An experimental enquiry of acute
           salinity stress on the early life of zebrafish

    • Abstract: Publication date: July 2019Source: Aquaculture Reports, Volume 14Author(s): Tania Farhana, Farhana Haque, Fahima Binte Amin, Md. Mahiuddin Zahangir, M. Sadiqul Islam This experiment was conducted to know the effects of salinity stress on the early life stages of zebrafish (Danio rerio). The objectives were evaluated by varying all combinations of developmental stages of zebrafish embryos exposing to a salinity gradient. The results demonstrated that zebrafish embryos (2 to 4-cell stage) could survive to hatching at 2 ppt (hatching rate 54.5%) but lowered at 4 ppt (hatching rate 23.5%). Acute exposure to 2 to 4-cell stage embryos for 60 and 120 min to different salinities (i.e., 0, 6, 8, 10, and 12 ppt) and then returned to freshwater (0 ppt) could hatch up to 8 ppt only at 60 min but not at 120 min exposures to embryos. The hatching rate was 14.5% and it took 20 h more times to hatch compared to control (0 ppt). While blastula stage exposed to 8 and 10 ppt salinities for 60 min, the hatching success was 59% and 36%, respectively. Although gastrula stage embryos were able to develop at 12 ppt salinity kept for 60 min the hatching success was markedly reduced (20.5%). Tolerance to salinity increased from advancing stages of development, i.e. the gastrulae were more tolerant of salinity change than the blastulae and the blastulae were more tolerant than the cleaving embryos. It is concluded that with the increasing salinities, the chances of embryogenesis and the survival of eggs decreased. In addition, tolerance to salinity increased from advanced stages of development.
       
  • Assessment on the effects of dietary fatty acids on growth performance,
           body compositions, plasma lysozyme activity and sensorial quality of
           juvenile marble goby, Oxyeleotris marmorata

    • Abstract: Publication date: July 2019Source: Aquaculture Reports, Volume 14Author(s): Wee-Ming Ti, Mei-Kying Ong, Chaiw-Yee Teoh The present study aimed to evaluate the effects of dietary fatty acids on the growth performance, body compositions, plasma lysozyme activity and sensorial quality of juvenile marble goby. Four experimental diets were formulated to contain different dietary oleic acid (OA, 18:1n-9)/ linoleic acid (LA, 18:2n-6) ratios ranged from 0.5 to 2.4 by manipulating the dietary oil sources. Fish oil was the main oil source for control diet (FO), while the other three diets, 50% of the dietary lipid was contributed by plant oil in which soybean oil, canola oil and a mixture of soybean and canola oils were added at the expense of fish oil and expressed as SO, CO and SOCO respectively. The results showed that feed conversion ratio (FCR) of fish fed CO was significantly higher (P   0.05) affect the whole body and fillet proximate compositions, and biological indices of fish except for hepatosomatix index (HSI) that was significantly higher in fish fed LA rich diets, SO and SOCO. Hepatic lipid of fish fed SOCO was significantly higher than that of other treatment group, although the dietary LA content in SOCO was lower than that in SO diet, suggesting that feeding fish with LA rich diet increased the HSI, and the interaction between fatty acids in the mixture of soybean and canola oils promoted the lipid accumulation in liver. Besides, high dietary LA positively affected the fillet sensorial quality. On the other hand, plasma lysozyme activity of the fish was increased with the increasing ratio of dietary omega-3 polyunsaturated fatty acids/ omega-6 polyunsaturated fatty acids.
       
  • An insight into advances in fisheries biology, genetics and genomics of
           African tilapia species of interest in aquaculture

    • Abstract: Publication date: July 2019Source: Aquaculture Reports, Volume 14Author(s): T. Olivier Amoussou, Issaka Youssao Abdou Karim, Guiguigbaza-Kossigan Dayo, Nawroz Kareem, Ibrahim Imorou Toko, Antoine Chikou, Aboubacar Toguyéni Morphological identification of tilapia species is complicated by extensive intraspecific variation of morphological characters used for classical identification. To address this obstacle, use of molecular techniques as additional tools for identification of these cichlids is recommended. Further, DNA marker technologies are useful in other areas such as conservation genetics, evolutionary biology, molecular ecology, population genetics, fish safety monitoring. A summary of the various methods of tilapia genetic resources characterization based on molecular markers is presented. We focused on some of tilapia species that are widely cultured in Africa, this includes both Oreochromis niloticus and Sarotherodon melanotheron. Eleven molecular markers that were divided into three categories (cytoplasmic, dominant and codominant markers) are commonly used for genetic analysis in tilapia, each has its advantages and disadvantages. Novel methods of genome sequencing and mapping in tilapia are also presented and discussed.
       
  • Effect of dietary Bio-fermented selenium on growth performance,
           nonspecific immune enzyme, proximate composition and bioaccumulation of
           zebrafish (Danio rerio)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Zhuoan Bai, Tongjun Ren, Yuzhe Han, Yanan Hu, Md Rana Schohel, Zhiqiang Jiang A four-weeks feeding trial was conducted to evaluate the effects of dietary Bio-fermented selenium (Bio-Se) on zebrafish (Danio rerio). Effects of three Se diets containing basal diet (1.63 mg Se/kg), L-Se diet (3 mg Se/kg), and H-Se diet (10 mg Se/kg) on growth performance, nonspecific immune enzyme activities, proximate composition, and selenium accumulation of zebrafish were tested. The results indicate that body weight gain (BWG), specific growth rate (SGR), and nonspecific immune enzyme [glutathione peroxidase (GPx), superoxide dismutase (SOD), and alkaline phosphatase (ALP)] activities of fish fed with L-Se diet were significantly highest among all the groups. However, increased H2O2 content and decreased SOD activity indicates oxidative stress when fish was fed with H-Se diet. Dietary Se did not affect the proximate composition of zebrafish. The Se concentration in muscle increased in a dose-dependent manner, and the highest Se concentration was recorded in H-Se diet. In summary, the growth performance and nonspecific immunity of zebrafish fed with L-Se diet improved, but exposure to higher concentrations of Bio-Se severely affects the health status of fish.
       
  • The effect of lobster meal on the growth performance and pigmentation of
           the common goldfish (Carassius auratus)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): N.A. Bell, S. Jeffrey, J.L. MacIsaac, S.M. Colombo This study evaluated lobster meal (LM) as a source of carotenoids and protein in diets for the Common Goldfish (Carassius auratus). Fish were fed four experimental diets which included up to 15% LM. After 8 weeks, there were no significant differences among treatments in terms of weight gain, condition factor, specific growth rate (SGR), feed intake, and feed conversion ratio (FCR). Lobster meal inclusion had no significant effect on whole body composition. Although, there were no significant differences in growth across all treatments, fish gained>350% with an SGR between 2.5–3.7 and an average FCR of 1.8. There were no treatment differences in pigmentation of the fish, but the lightness, redness and yellowness scores did increase after the duration of the trial. LM could be used as a source of pigment and protein, and could reduce the need for synthetic carotenoids in commercial fish feeds.
       
  • Sink before you settle: Settlement behaviour of Eastern oyster
           (Crassostrea virginica) larvae on artificial spat collectors and natural
           substrate

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Luke A. Poirier, Jeff C. Clements, John D.P. Davidson, Gilles Miron, Jeff Davidson, Luc A. Comeau Eastern oysters (Crassostrea virginica) are ecosystem engineers that are important to the ecological and economic sustainability of Atlantic Canada’s estuarine resources. Recently, there has been an increased industry demand for oyster spat (i.e., newly-settled larvae), which is often collected using artificial spat collectors suspended in the water column. Little is known, however, about the interactions between artificial spat collectors and naturally occurring substrates, and whether or not such collectors can affect oyster recruitment to wild beds which are simultaneously fished. In the laboratory, we mimicked the typical set-up of artificial spat collectors used in Atlantic Canada to measure differences in spat recruitment between locally-used artificial collectors and natural shell substrate under real-life spat-collection scenarios. Larvae were allowed to settle on various substrates where they occur in a natural system and were subsequently counted. In both single substrate and choice experiments, results indicated that oyster larvae recruited in higher numbers to natural shell substrate located on the benthic surface compared to suspended shell; and there were no significant differences among suspended substrates. This experiment provides evidence supporting existing theories around recruitment behaviour by oyster larvae, mainly that settling oysters tend to sink before they settle, suggesting that spat collectors in the wild may have little effect on wild recruitment. With increasing densities of artificial collectors in estuarine systems to meet system demands, however, further research is needed to investigate the potential draw of oyster larvae away from benthic oyster beds under more realistic natural conditions before broad conclusions regarding spat collector effects on wild oyster populations can be achieved.
       
  • Nitrogen removal potential of shellfish aquaculture harvests in eastern
           Canada: A comparison of culture methods

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Jeff C. Clements, Luc A. Comeau Bivalve farming can contribute to nutrient removal in coastal and estuarine systems, as bivalves directly incorporate nutrients into their tissues and shells. We conducted a meta-analysis to compare the nitrogen removal potential (NRP; i.e., percentage of nitrogen in tissues and shells) of mussels, Mytilus edulis, and oysters, Crassostrea virginica. We then used species-specific NRPs to determine and compare the total and per-hectare NRPs for four shellfish aquaculture methods used in two Atlantic Canadian provinces – New Brunswick (NB) and Prince Edward Island (PEI) – based on current harvest biomasses. Finally, we determined the contribution of current shellfish farming to nitrogen load mitigation for a subset of bays in NB and PEI. Results revealed that on a per-weight basis, NRP was similar for the tissues of mussels and oysters, while mussel shells had a significantly higher percentage of nitrogen than oyster shells. Collectively, shellfish harvesting has the capacity to remove a mean annual total of 99088 kg and 204571 kg of nitrogen from NB and PEI, respectively. Given current harvesting practices for four culture methods employed in the region, suspended mussel culture provides the greatest NRP per hectare of farm area, followed in sequence by suspended mussel and oyster mixed culture, suspended oyster culture, and bottom oyster culture. Preliminary analysis suggested that harvests in the region typically remove
       
  • The annual cycle of spermatozoa content in the vas deferens and some
           reproductive parameters in the narrow-clawed crayfish Pontastacus
           leptodactylus (Eschscholtz, 1823)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Ardavan Farhadi, Muzaffer Mustafa Harlıoğlu Understanding the annual dynamic of gametes in crayfish is useful for successful management of crayfish population. The annual variations in spermatozoa content of vas deferens, gonado-somatic index (GSI), hepatosomatic index (HSI), vas deferens index (VDI), and testicular index (TI) were investigated in male Pontastacus leptodactylus. The spermatozoa content, GSI, HSI, VDI, and TI of P. leptodactylus significantly (P 
       
  • The pearl oyster (Pinctada margaritifera) aquaculture in French Polynesia
           and the indirect impact of long-distance transfers and collection-culture
           site combinations on pearl quality traits

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Chin-Long Ky, Floriane Broustal, Dan Potin, Cédrik Lo In French Polynesia, the P. margaritifera pearl aquaculture industry is spread over a vast area, as large as Europe. All the oysters for this the highly economically important activity are supplied from just a few collection lagoons, but they are grown in numerous sites across three archipelagos (Gambier, Society and Tuamotu). Many oyster transfers thus indirectly bring about grafting combinations mixing different geographic origins and production sites. This study aims to examine the impact of such graft combinations on cultured pearl quality traits. For this, six homogeneous and standardised experimental graft combinations (N = 6197) were conducted at commercial scale in the two growing locations the most frequently used in French Polynesia: Arutua atoll (Tuamotu) and Mangareva island (Gambier), using oysters supplied from by the top three collection sites: Ahe, Takapoto and Mangareva lagoons. At harvest, four main pearl quality traits: nacre weight deposition speed, pearl colour components (darkness level and green overtone), grade and shape categories were recorded by a professional sorter from the Tahiti auction and compared. Results revealed effects of the combinations of oyster origin and grow-out location, with: 1) significant origin × site interaction for nacre weight deposition speed; 2) colour variation at intra- and inter-site scales, with Ahe origin producing the most dark pearls and Gambier highest rate of the attractive green coloured pearls; and 3) higher grade categories for the Gambier origin and rearing location. These oyster-site combination effects highlight the benefit for the Polynesian pearl industry of switching from a mono-site/ company production system to a new multi-site production strategy to maximize overall cultured pearl quality expression.
       
  • Pharmacokinetic study of amoxicillin in Japanese eel Anguilla japonica by
           high performance liquid chromatography with fluorescence detection

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Yu-Wen Hung, Yu-Hsing Lin, Chun-Yang Chan, Way-Shyan Wang, Ching-Feng Chiu, Chien-Chao Chiu, Hsuan-Wen Chiu, Wei-Huang Tsai, Shao-Wen Hung Amoxicillin (AMX) is widely used for the treatment of gastrointestinal and systemic infections. AMX residues above certain levels may pose a threat to human health. Therefore, this study aimed to understand the pharmacokinetics of AMX in Japanese eel, Anguilla japonica, using high-performance liquid chromatography (HPLC) with fluorescence detection. Japanese eels were treated with AMX at concentrations of 40 or 80 mg kg−1 body weight (BW) daily via oral administration. The results revealed that the recoveries of AMX from the muscle, liver, and sera of eels were 84.7–105.1%, 81.8–104.9%, and 88.6–106.3%, respectively. The observed peak retention time was approximately 4.2 min. After administration of 40 mg kg−1 BW per day of AMX, the pharmacokinetic parameters were detected, respectively. The average drug residue concentration in muscles was 180 and 260 ng mL−1 on day 1 and day 2, respectively, and in the liver, it was 70 and 110 ng mL−1 on day 1 and day 2, respectively, after the 40 mg kg−1 BW daily AMX administration. Residue concentrations in the muscle and liver on day 3 after 40 mg kg−1 BW administrations were below the limit of detection (
       
  • Temperature changes influenced the growth performance and physiological
           functions of Thai pangas Pangasianodon hypophthalmus

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Md. Ariful Islam, Md. Helal Uddin, Md. Jasim Uddin, Md. Shahjahan Temperature is an important environmental factor that plays significant role in the growth and metabolism of fish. Hence an experiment was conducted to know the effects of temperature changes on growth, blood glucose and hemoglobin levels in Thai pangas, Pangasianodon hypophthalmus after acclimatized to four temperature conditions, such as 24 °C, 28 °C, 32 °C and 36 °C for 28 days. In addition, erythrocytic cellular abnormalities (ECA) and erythrocytic nuclear abnormalities (ENA) tests were assayed using peripheral erythrocytes after exposed to four temperature conditions. Fish were sacrificed at day -7, -14 and -28. Growth performance viz., weight gain, specific growth rate (SGR) and feed conversion ratio (FCR) were much better in 28 °C and 32 °C compared to 24 °C and 36 °C. At day-7, blood glucose levels were significantly increased in 36 °C, while at day-28 showed opposite scenario. On the other hand, at day-7, hemoglobin levels were significantly decreased in 36 °C. Interestingly, the frequencies of ECA and ENA were significantly elevated in highest temperature (36 °C) throughout the experimental period. Dissolved oxygen decreased and free CO2 increased significantly with increasing temperature, while the pH and total alkalinity showed no distinct changes throughout the study period. This study confirmed that Thai pangas feel better adaptation at 28 °C and 32 °C, while high temperature 36 °C is likely stressful and low temperature 24 °C is not suitable for growth performance to this fish species.
       
  • Carbon sequestration potential of Scenedesmus quadricauda (Turpin) and
           evaluation on Zebra fish (Danio rerio)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): A. Maryshamya, T. Rajasekar, R. Rengasamy Carbon dioxide sequestration by microalgae is receiving increased attention in alternative impact of increasing CO2 in the atmosphere. For this study, we have chosen three different microalgae such as Chlorococcum humicola, Chlorella vulgaris and Scenedesmus quadricauda were treated with 3 W/m2 UV-B radiation in different time durations (10, 15, 30, 45 and 60 min) and supplemented with bold basal medium. Parameters such as Total Chlorophyll, protein, Carbohydrate, and CO2 fixation rate were determined. Based on the parameters Scenedesmus quadricauda is used for carbon sequestration study. Different concentrations of sodium bicarbonate (0.2%–1%) were supplemented to bold basal medium for carbon utilization it can act as an alternative source of atmospheric CO2. In this maximum amount of chlorophyll content were observed in 0.6% of Sodium bicarbonate. The uttermost amount of CO2 fixation rate and lipid content was recorded at 0.4% sodium bicarbonate concentration. Finally, the result indicated that Scenedesmus quadricauda could be used for CO2 mitigation and having a rich source of polyunsaturated fatty acid. Further urea and glucose in the media positively influence growth and CO2 fixation rate of micro algae. These carbon and PUFA rich microalgae can be used as dietary feed fish usually obtain necessary nutrients via bioaccumulation through the food chain. Thus, this study proves to be an encouraging source of discovery of alternating the dietary source for fish and also helping in carbon utilization process in a natural way.Graphical abstractGraphical abstract for this article
       
  • Effect of estrogen hormone, 17β-estradiol on feminization of banana
           shrimp, Penaeus merguiensis (de Man, 1888) postlarvae and the
           identification of the age of external sex differentiation

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Mhd Ikhwanuddin, Hafiz Bahar, Hongyu Ma, Hidayah Manan In the majority of species in which monosex culture is practised, the female is more economically attractive than the male because of its faster growth rate (Beardmore et al., 2001). Due to the profitability surrounding commercial shrimp farming, a study was conducted to determine the effect of estrogen hormone, 17ß-estradiol (E2) on the feminization and also to identify the age of external sex differentiation of banana shrimp, Penaeus merguiensis postlarvae (PL), starting from the first day of PL. From the results of feminization via a lower E2 hormone (0–1000 mg/kg) application revealed that, a concentration of 800 mg/kg was able to produce 79.3% females, while a 1000 mg/kg concentration would produce 85.3% PL shrimps with a 19.16% to 45.6% survival rate. By applying a higher E2 hormone concentration (1000–1800 mg/kg) of 1200 mg/kg to the shrimps’ feeding, 99% females were produced, while an application of between 1400 and 1800 mg/kg concentration was identified to produce 100% female PL shrimps with a 45.6% to 60.17% survival rate. The optimum concentration for application was identified at a higher dosage, which was at 1600 mg/kg, with a 100% feminization results followed by good weight and length growth rate compared to the results from other dosage applications. From the sex identification, the shrimp’s sex organ appeared at 50 days of culture (PL50) for both male and female shrimps. For the male shrimp PL, an Appendix Masculine was identified at its second pleopod; Male Gonophores at the fifth pereiopods and an Early Male Petasma was identified at the first pleopod. For the female, a Sharp Ridge Thelycum was identified at the fifth pereiopod of the shrimp. As a conclusion, even though the concentration to produce 100% females could be identified, further studies should be carried out to improve the survival rate of the PL shrimps, possibly by the use of hormone treatments in the future.
       
  • The effect of rearing temperature on the survival and growth of early
           juvenile Atlantic surfclams (Spisula solidissima)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Michael P. Acquafredda, Daphne M. Munroe, Lisa M. Ragone Calvo, Michael De Luca The Atlantic surfclam (Spisula solidissima) is not currently cultivated on commercial scales, but it represents a potentially beneficial target species for crop diversification in the Northeast region of the United States. Surfclams are native to the region and rapid growth gives this species the potential to reach marketable sizes within 12 to 18 months. Since heating and chilling seawater are major operating costs for bivalve seed production, a thorough understanding of how temperature influences juvenile surfclam survival and growth during the nursery phase – the period between metamorphosis and out-planting – must be determined before mainstream production can occur. We assessed early juvenile rearing temperature by conducting a month-long study where post-metamorphic surfclams (initial shell length ≈0.7 mm) were exposed to one of five temperature treatments (18.0, 20.2, 23.2, 24.4, and 26.3 °C.). Survival was approximately twice as high at 18 °C compared to 26 °C. Growth was maximized at intermediate temperatures between 20 and 24 °C. Additionally, we monitored the survival and growth of juvenile surfclams for 20 weeks during the Northeast’s typical bivalve nursery operating season. Surfclams (initial shell length ≈1.5 mm) were reared at a commercial-scale using flow-through upwelling systems, supplied with ambient seawater from the Cape May Canal. Surfclam seed survival after the 20-week study was 52%, with most mortality occurring after the temperature peaked around 27 °C. The average growth rate over this study was 0.049 mm d−1. Our results suggest that juvenile surfclams should be reared in temperatures close to 20 °C for the duration of the nursery phase. Colder temperatures increase survival but tend to slow growth. Prolonged exposure to warm temperatures can cause severe mortality, yet juvenile surfclams seem to have the ability to tolerate short-term exposures to unfavorably warm temperatures. Across the Northeast, the ambient seawater should be sufficient for surfclam seed production at commercial scales.
       
  • Muscle growth and changes in chemical composition of spotted wolffish
           juveniles (Anarhichas minor) fed diets with and without microalgae
           (Scenedesmus obliquus)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): H.R. Knutsen, O.H. Ottesen, A.M. Palihawadana, W. Sandaa, M. Sørensen, Ø. Hagen Spotted wolffish (Anarhichas minor) is a promising new candidate for cold-water fish farming, but knowledge is needed about its physiology and its capacity to utilize alternative feed ingredients. The aim of the study was to investigate fast muscle growth dynamics, changes in chemical composition as well as growth performance of spotted wolffish when fed diets with or without the microalgae Scenedesmus obliquus incorporated. Juvenile spotted wolffish were fed four diets containing fishmeal as the primary source of protein (CTR diet) or microalgae (Scenedesmus obliquus) replacing 4% (AL4 diet), 8% (AL8 diet) or 12% (AL12 diet) of the fishmeal. During the 12 week experiment, fish grew from an average weight of 140 g to 250 g. The results showed indications of fast muscle cellularity of spotted wolffish being affected by dietary algae inclusion as the control and AL4 groups appeared to be more strongly favored by hypertrophic growth compared to the AL8 and AL12 groups. The CTR and AL4 groups tended towards increased muscle fiber diameters and higher proportions of larger muscle fibers, while the AL8 and AL12 group tended towards similar or increased proportions of smaller muscle fibers at the end of the trial. Probability density functions showed no difference in fast muscle fiber size distributions between dietary groups. Muscle crude protein and fat content tended to increase with growth in all treatment groups and muscle mineral content was reduced in all groups fed diets containing Scenedesmus. At the end of the trial, hepatosomatic index was reduced in all treatment groups. Dietary replacement of fishmeal with Scenedesmus also affected skin coloration, with increasing yellowness observed with increasing microalgae replacement. This study indicates that spotted wolffish has the potential to use microalgae as an alternative to fishmeal in the diet.
       
  • A study of the digestive enzyme activities in scaleless carp (Gymnocypris
           przewalskii) on the Qinghai-Tibetan Plateau

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Haining Tian, Yuqiong Meng, Changzhong Li, Lunxiang Zhang, Guoqian Xu, Yuan Shi, Jianquan Shi, Hongfang Qi, Rui Ma Two experiments were conducted to study the digestive enzyme activities in scaleless carp (Gymnocypris przewalskii) on the Qinghai-Tibetan Plateau. In experiment 1, the distribution of digestive enzymes in various digestive organs of G. przewalskii (body weight: 118.24 ± 9.48 g) was studied. Results showed that digestive enzyme specific activities in intestine were significantly higher than those in hepatopancreas (P 
       
  • Increased protein-to-lipid ratio in energy dense diets improves slaughter
           yields and muscle thickness of different weight classes of farmed Atlantic
           salmon (Salmo salar L.)

    • Abstract: Publication date: March 2019Source: Aquaculture Reports, Volume 13Author(s): Rúni Weihe, Jens-Erik Dessen, Regin Arge, Magny S. Thomassen, Bjarne Hatlen, Kjell-Arne Rørvik Two isoenergetic feeding strategies, with emphasis on the grow-out stage (> 1 kg), with dietary high (HP > 1.1) and low protein-to-lipid ratio (LP 
       
 
 
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