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  Subjects -> BIOLOGY (Total: 2992 journals)
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BIOLOGY (1423 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 20)
Achievements in the Life Sciences     Open Access   (Followers: 4)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 21)
Acta Biologica Colombiana     Open Access   (Followers: 7)
Acta Biologica Hungarica     Full-text available via subscription   (Followers: 4)
Acta Biologica Sibirica     Open Access  
Acta Biomaterialia     Hybrid Journal   (Followers: 25)
Acta Biotheoretica     Hybrid Journal   (Followers: 5)
Acta Chiropterologica     Full-text available via subscription   (Followers: 6)
acta ethologica     Hybrid Journal   (Followers: 4)
Acta Limnologica Brasiliensia     Open Access   (Followers: 3)
Acta Médica Costarricense     Open Access   (Followers: 2)
Acta Musei Silesiae, Scientiae Naturales : The Journal of Silesian Museum in Opava     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 9)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 2)
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 4)
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 3)
Advances in Bioinformatics     Open Access   (Followers: 18)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 8)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 6)
Advances in Cell Biology     Open Access   (Followers: 23)
Advances in Cellular and Molecular Biology of Membranes and Organelles     Full-text available via subscription   (Followers: 12)
Advances in Developmental Biology     Full-text available via subscription   (Followers: 11)
Advances in DNA Sequence-Specific Agents     Full-text available via subscription   (Followers: 5)
Advances in Ecological Research     Full-text available via subscription   (Followers: 41)
Advances in Ecology     Open Access   (Followers: 16)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 20)
Advances in Enzyme Research     Open Access   (Followers: 9)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Genome Biology     Full-text available via subscription   (Followers: 12)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Human Biology     Open Access   (Followers: 1)
Advances in Life Science and Technology     Open Access   (Followers: 14)
Advances in Life Sciences     Open Access   (Followers: 4)
Advances in Marine Biology     Full-text available via subscription   (Followers: 16)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 22)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 1)
Advances in Structural Biology     Full-text available via subscription   (Followers: 8)
Advances in Virus Research     Full-text available via subscription   (Followers: 5)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 6)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 1)
Ageing Research Reviews     Hybrid Journal   (Followers: 8)
Aging Cell     Open Access   (Followers: 10)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Full-text available via subscription   (Followers: 13)
AJP Endocrinology and Metabolism     Full-text available via subscription   (Followers: 22)
AJP Lung Cellular and Molecular Physiology     Full-text available via subscription   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
Ambix     Hybrid Journal   (Followers: 3)
American Biology Teacher     Full-text available via subscription   (Followers: 12)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 10)
American Journal of Bioethics     Hybrid Journal   (Followers: 10)
American Journal of Biostatistics     Open Access   (Followers: 9)
American Journal of Human Biology     Hybrid Journal   (Followers: 12)
American Journal of Medical and Biological Research     Open Access   (Followers: 5)
American Journal of Plant Sciences     Open Access   (Followers: 19)
American Journal of Primatology     Hybrid Journal   (Followers: 15)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 65)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 7)
Anatomical Science International     Hybrid Journal   (Followers: 2)
Animal Cells and Systems     Hybrid Journal   (Followers: 4)
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 UMCS, Biologia     Open Access   (Followers: 1)
Annals of Applied Biology     Hybrid Journal   (Followers: 8)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 4)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 17)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 25)
Annual Review of Cancer Biology     Full-text available via subscription  
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 38)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 14)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 19)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 25)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antibiotics     Open Access   (Followers: 8)
Antioxidants     Open Access   (Followers: 4)
Antioxidants & Redox Signaling     Hybrid Journal   (Followers: 8)
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: 8)
Applied Bionics and Biomechanics     Open Access   (Followers: 8)
Applied Vegetation Science     Full-text available via subscription   (Followers: 9)
Aquaculture Environment Interactions     Open Access   (Followers: 2)
Aquaculture International     Hybrid Journal   (Followers: 22)
Aquaculture Reports     Open Access   (Followers: 3)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 6)
Aquatic Biology     Open Access   (Followers: 4)
Aquatic Ecology     Hybrid Journal   (Followers: 30)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 13)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 19)
Archaea     Open Access   (Followers: 3)
Archiv für Molluskenkunde: International Journal of Malacology     Full-text available via subscription   (Followers: 3)
Archives of Biomedical Sciences     Open Access   (Followers: 7)
Archives of Microbiology     Hybrid Journal   (Followers: 8)
Archives of Natural History     Hybrid Journal   (Followers: 7)
Archives of Oral Biology     Hybrid Journal   (Followers: 2)
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: 2)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 1)
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: 2)
Asian Journal of Nematology     Open Access   (Followers: 3)
Asian Journal of Poultry Science     Open Access   (Followers: 4)
Australian Life Scientist     Full-text available via subscription   (Followers: 2)
Australian Mammalogy     Hybrid Journal   (Followers: 5)
Autophagy     Hybrid Journal   (Followers: 2)
Avian Biology Research     Full-text available via subscription   (Followers: 4)
Avian Conservation and Ecology     Open Access   (Followers: 10)
Bacteriology Journal     Open Access   (Followers: 2)
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)
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  
Bioanalytical Reviews     Hybrid Journal   (Followers: 2)
Biocatalysis and Biotransformation     Hybrid Journal   (Followers: 6)
Biochemistry and Cell Biology     Hybrid Journal   (Followers: 14)
Biochimie     Hybrid Journal   (Followers: 7)
BioControl     Hybrid Journal   (Followers: 5)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal   (Followers: 1)
Biodiversidad Colombia     Open Access  
Biodiversity : Research and Conservation     Open Access   (Followers: 26)
Biodiversity and Natural History     Open Access   (Followers: 5)
Biodiversity Data Journal     Open Access   (Followers: 3)
Biodiversity Informatics     Open Access  
Bioedukasi : Jurnal Pendidikan Biologi FKIP UM Metro     Open Access  
Bioeksperimen : Jurnal Penelitian Biologi     Open Access  
Bioelectrochemistry     Hybrid Journal   (Followers: 2)
Bioelectromagnetics     Hybrid Journal   (Followers: 1)
Bioenergy Research     Hybrid Journal   (Followers: 2)
Bioengineering and Bioscience     Open Access   (Followers: 1)
BioEssays     Hybrid Journal   (Followers: 10)
Bioethics     Hybrid Journal   (Followers: 14)
BioéthiqueOnline     Open Access  
Biofabrication     Hybrid Journal   (Followers: 3)
Biogeosciences (BG)     Open Access   (Followers: 10)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 1)
Bioinformatics     Hybrid Journal   (Followers: 293)
Bioinformatics and Biology Insights     Open Access   (Followers: 15)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 6)
Biointerphases     Open Access   (Followers: 1)
Biojournal of Science and Technology     Open Access  
Biologia     Hybrid Journal  
Biologia on-line : Revista de divulgació de la Facultat de Biologia     Open Access  
Biological Bulletin     Partially Free   (Followers: 4)
Biological Control     Hybrid Journal   (Followers: 5)
Biological Invasions     Hybrid Journal   (Followers: 16)
Biological Journal of the Linnean Society     Hybrid Journal   (Followers: 15)
Biological Letters     Open Access   (Followers: 4)
Biological Procedures Online     Open Access  
Biological Psychiatry     Hybrid Journal   (Followers: 42)
Biological Psychology     Hybrid Journal   (Followers: 6)
Biological Research     Open Access  
Biological Rhythm Research     Hybrid Journal   (Followers: 2)
Biological Theory     Hybrid Journal   (Followers: 1)
Biological Trace Element Research     Hybrid Journal  
Biologicals     Full-text available via subscription   (Followers: 9)
Biologics: Targets & Therapy     Open Access   (Followers: 1)
Biologie Aujourd'hui     Full-text available via subscription  
Biologie in Unserer Zeit (Biuz)     Hybrid Journal   (Followers: 42)
Biologija     Open Access  
Biology     Open Access   (Followers: 5)
Biology and Philosophy     Hybrid Journal   (Followers: 16)
Biology Bulletin     Hybrid Journal   (Followers: 1)
Biology Bulletin Reviews     Hybrid Journal  
Biology Direct     Open Access   (Followers: 7)
Biology Letters     Full-text available via subscription   (Followers: 35)

        1 2 3 4 5 6 7 8 | Last

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  [2355 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
           aquaponics
    • 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)
       
  • 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)
       
  • 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 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)
       
  • Study on the genetic variability of the hatchery-released and wild
           populations of Chinese white shrimp Fenneropenaeus chinensis in the Yellow
           Sea and Bohai Sea
    • Authors: Pengfei Li; Hui Zhang; Xiumei Zhang; Tianxiang Gao; Zhiqiang Han
      Abstract: In relation to the stock enhancement program for Chinese white shrimp Fenneropenaeus chinensis, hatchery-released juveniles and wild samples in the Yellow Sea and Bohai Sea were genotyped using amplified fragment length polymorphism (AFLP) markers to investigate the levels of genetic variation among these populations. Five AFLP primer combinations generated a total of 757 bands across the 268 individuals in nine hatchery-released populations and three wild populations. All 757 bands were polymorphic. High polymorphism at AFLP markers was found within both hatchery-released and wild populations. The percentage of polymorphic loci for populations ranged from 87.22 to 98.60%, while the Nei’s genetic diversity ranged from 0.1822 to 0.2728. Compared with wild populations, the nine hatchery-released populations showed significant genetic changes based on F ST values. All populations were divided into two distinct groups by principal coordinate analysis (PcoA) analysis. Three wild populations (Dalian, Kengli, Middle Yellow Sea) with hatchery-released populations from Rongcheng, Panjin, and Dandong clustered as one group; the rest of hatchery populations formed another group. Interestingly, no obvious geographic cluster was found in the unweighted pair group method with arithmetic mean tree and PcoA. We recommend monitoring the genetic variability of selected hatchery populations to enhance the conservation of natural Chinese white shrimp F. chinensis resources.
      PubDate: 2017-07-18
      DOI: 10.1007/s10499-017-0174-6
       
  • Dietary supplementation of acidifier: effect on growth performance and
           haemato-biochemical parameters in the diet of Cirrhinus mrigala juvenile
    • Authors: Pankaj Kumar; K. K. Jain; P. Sardar; N. P. Sahu; S. Gupta
      Abstract: The dietary supplementation of acidifier in Cirrhinus mrigala juvenile was evaluated in terms of change in growth, autochthonous intestinal microbiota and haemato-biochemical parameters for period of 60 days. Acidifier was added at a level of 0 (control diet), 0.5, 1 and 1.5% to the practical pellet diet. At the end of the experiment, growth parameters, survival, bacillus bacterial population, haematological and immunological parameters were analysed. Higher WG%, SGR and PER and lower FCR (P < 0.05) was found in group fed 1.5% OA. Lysozyme activity and respiratory burst activity (nitroblue tetrazolium) were significantly affected by dietary 1.5% acidifier (P < 0.05). In fish fed on the diet with 1.5% acidifier showed a significant increase of total heterotrophic autochthonous bacterial and Bacillus levels (P < 0.05) compared with those fed on the diets supplemented with organic acid. In addition to increase in WBC, RBC, haemoglobin and platelets count levels were observed in this group. Relative % survival rate was found to be higher in the fish fed on 1.5% acidifier after challenging with Aeromonas hydrophilla bacteria. These results indicated that dietary supplementation of acidifier at a dose of 1.5% improved growth performance and enhanced the beneficial intestinal microbiota and stimulate immune response of Cirrhinus mrigala juvenile.
      PubDate: 2017-07-13
      DOI: 10.1007/s10499-017-0176-4
       
  • Effects of different combinations of Bacillus on immunity and antioxidant
           activities in common carp
    • Authors: Longtao Wang; Chenxia Ge; Jianchao Wang; Jing Dai; Peijun Zhang; Yuehong Li
      Abstract: Bacillus can not only improve the ecological environment of aquaculture water, but also improve the immunity of aquaculture animals, inhibit the reproduction of pathogenic microorganisms and reduce the incidence of disease. The present study represented the effect of different combinations of Bacillus on immunity and antioxidant activities in common carp. A total of 240 fish were randomly divided into four groups: control group (basal diet), experimental group I (add B. subtilis), experimental group II (add B. subtilis and B. licheniformis), and experimental group III (B. subtilis, B. licheniformis, and B. cereus). Compared with the control group, the carp in experimental group II displayed a significantly elevated phagocytic percentage (up to a 20.2% increase; P < 0.05), phagocytic index (up to a 41.5% increase; P < 0.05), serum immunoglobulin M (up to a 26.1% increase; P < 0.05), serum lysozyme activity (up to a 21.9% increase; P < 0.05), intestinal mucosal secretory immunoglobulin A content (up to a 53.1% increase; P < 0.05), and peripheral blood lymphocyte proliferation ratio (up to a 32.8% increase; P < 0.05). Further analysis of liver antioxidants showed that, compared with the control group, carp in experimental group II displayed elevated superoxide dismutase (69.4%; P < 0.05), glutathione peroxidase (25.4%; P < 0.05), catalase (76.4%; P < 0.05), total antioxidant (41.1%; P < 0.05), maleic dialdehyde (28.9%; P < 0.05), and glutathione (35.6%; P < 0.05) activities. There was no significant difference between the experimental group I and the experimental group III (P > 0.05). Our results indicated that dietary Bacillus enhanced the performance of the common carp immune response and that a mixture of strains elevated the antioxidant ability.
      PubDate: 2017-07-08
      DOI: 10.1007/s10499-017-0175-5
       
  • Estimates of genetic parameters and genotype by environment interactions
           for shell nacre color and growth traits in the purple freshwater pearl
           mussel Hyriopsis cumingii
    • Authors: Zhiyi Bai; Qingqing Li; Xuekai Han; Jiale Li
      Abstract: Hyriopsis cumingii, one of the most commercially important freshwater pearl mussel in China, produced most of white and orange cultured pearls. However, purple freshwater cultured pearls, with higher commercial value, are the most popular due to its rarity. For increasing the yields of purple pearl, one selection breeding program for improving shell nacre color were developed in H. cumingii. Genetic parameters and genotype by environment interactions for shell nacre color and growth traits were estimated from the fifth-generation purple selective strain of H. cumingii reared at two sites (Chongming and Jinhua). Four shell nacre color parameters and six shell growth traits were recorded by 1142 individuals at 12-month-old. Microsatellite-based DNA parentage analysis was used to assign the mussels to 13 paternal half-sib families, including 37 full-sib families. Genetic diversity was found to be high in the selected strain, with a mean expected heterozygosity at 6 microsatellite loci equal to 0.791. Heritability estimates of four shell nacre color parameters, lightness (L*), redness (a*), yellowness (b*), and total color change (dE) were 0.33 ± 0.19, 0.17 ± 0.10, 0.69 ± 0.10, and 0.33 ± 0.19, respectively. Heritability estimates were 0.20 ± 0.03 for shell length, 0.16 ± 0.06 for shell height, 0.17 ± 0.02 for shell width, 0.23 ± 0.01 for body weight, 0.15 ± 0.06 for mantle weight, and 0.31 ± 0.03 for shell weight. No significant phenotypic or genetic correlation was found between shell nacre color parameters and growth traits. All shell nacre color parameters and growth traits, except for shell nacre color parameter b*, exhibited may be significant genotype by environment interactions at the two sites. The results suggest that shell nacre color parameters may be treated as selective traits for further improving shell nacre color. And shell nacre color may be selected for independently of selection on growth performance. Some considering to the likely genotype by environment interactions for shell nacre color and growth traits should be taken in future selective breeding programs for large-scale culture practices.
      PubDate: 2017-07-05
      DOI: 10.1007/s10499-017-0170-x
       
  • Supplying rapeseed meal to the diets with or without potassium iodide for
           yellow catfish ( Tachysurus fulvidraco )
    • Authors: Chunling Wang; Lingli Jiang; Guoying Qian; Youling Gao
      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
      DOI: 10.1007/s10499-017-0171-9
       
  • Recombinant vaccine protects juvenile hybrid grouper, Epinephelus
           fuscoguttatus × Epinephelus lanceolatus , against infection by Vibrio
           alginolyticus
    • Authors: R. Nehlah; M. Firdaus-Nawi; N. Y. Nik-Haiha; M. Karim; M. Zamri-Saad; M. Y. Ina-Salwany
      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
      DOI: 10.1007/s10499-017-0172-8
       
  • 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 )
    • Authors: Alison Eduardo Melo da Paixão; Jéssica Cerqueira dos Santos; Mariana Sampaio Pinto; Denise Soledade Peixoto Pereira; Carlos Eduardo Crispim de Oliveira Ramos; Robson Bahia Cerqueira; Rodrigo Diana Navarro; Rodrigo Fortes da Silva
      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
      DOI: 10.1007/s10499-017-0173-7
       
  • 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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