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BIOLOGY (1497 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1720 Journals sorted alphabetically
AAPS Journal     Hybrid Journal   (Followers: 22)
Achievements in the Life Sciences     Open Access   (Followers: 5)
ACS Synthetic Biology     Full-text available via subscription   (Followers: 24)
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: 27)
Acta Biotheoretica     Hybrid Journal   (Followers: 4)
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 Neurobiologiae Experimentalis     Open Access  
Acta Parasitologica     Hybrid Journal   (Followers: 10)
Acta Scientiarum. Biological Sciences     Open Access   (Followers: 2)
Acta Scientifica Naturalis     Open Access   (Followers: 3)
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis     Open Access  
Actualidades Biológicas     Open Access   (Followers: 1)
Advanced Health Care Technologies     Open Access   (Followers: 4)
Advanced Journal of Graduate Research     Open Access  
Advanced Studies in Biology     Open Access  
Advances in Antiviral Drug Design     Full-text available via subscription   (Followers: 2)
Advances in Bioinformatics     Open Access   (Followers: 17)
Advances in Biological Regulation     Hybrid Journal   (Followers: 4)
Advances in Biology     Open Access   (Followers: 8)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 7)
Advances in Cell Biology     Open Access   (Followers: 25)
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: 43)
Advances in Environmental Sciences - International Journal of the Bioflux Society     Open Access   (Followers: 17)
Advances in Enzyme Research     Open Access   (Followers: 10)
Advances in Experimental Biology     Full-text available via subscription   (Followers: 7)
Advances in Genome Biology     Full-text available via subscription   (Followers: 8)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances in Human Biology     Open Access   (Followers: 3)
Advances in Life Science and Technology     Open Access   (Followers: 16)
Advances in Life Sciences     Open Access   (Followers: 6)
Advances in Marine Biology     Full-text available via subscription   (Followers: 14)
Advances in Molecular and Cell Biology     Full-text available via subscription   (Followers: 21)
Advances in Organ Biology     Full-text available via subscription   (Followers: 1)
Advances in Planar Lipid Bilayers and Liposomes     Full-text available via subscription   (Followers: 3)
Advances in Regenerative Biology     Open Access   (Followers: 1)
Advances in Space Biology and Medicine     Full-text available via subscription   (Followers: 5)
Advances in Structural Biology     Full-text available via subscription   (Followers: 5)
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: 10)
Aging Cell     Open Access   (Followers: 12)
Agrokémia és Talajtan     Full-text available via subscription   (Followers: 2)
Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat     Open Access  
AJP Cell Physiology     Hybrid Journal   (Followers: 15)
AJP Endocrinology and Metabolism     Hybrid Journal   (Followers: 23)
AJP Lung Cellular and Molecular Physiology     Hybrid Journal   (Followers: 3)
Al-Kauniyah : Jurnal Biologi     Open Access  
Alasbimn Journal     Open Access   (Followers: 1)
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 Biology Teacher     Full-text available via subscription   (Followers: 14)
American Fern Journal     Full-text available via subscription   (Followers: 1)
American Journal of Agricultural and Biological Sciences     Open Access   (Followers: 8)
American Journal of Bioethics     Hybrid Journal   (Followers: 10)
American Journal of Human Biology     Hybrid Journal   (Followers: 13)
American Journal of Medical and Biological Research     Open Access   (Followers: 8)
American Journal of Plant Sciences     Open Access   (Followers: 19)
American Journal of Primatology     Hybrid Journal   (Followers: 14)
American Malacological Bulletin     Full-text available via subscription   (Followers: 3)
American Naturalist     Full-text available via subscription   (Followers: 71)
Amphibia-Reptilia     Hybrid Journal   (Followers: 6)
Anadolu University Journal of Science and Technology : C Life Sciences and Biotechnology     Open Access  
Anaerobe     Hybrid Journal   (Followers: 4)
Analytical Methods     Full-text available via subscription   (Followers: 10)
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: 7)
Annals of Biomedical Engineering     Hybrid Journal   (Followers: 18)
Annals of Human Biology     Hybrid Journal   (Followers: 5)
Annual Review of Biomedical Engineering     Full-text available via subscription   (Followers: 15)
Annual Review of Biophysics     Full-text available via subscription   (Followers: 23)
Annual Review of Cancer Biology     Full-text available via subscription   (Followers: 1)
Annual Review of Cell and Developmental Biology     Full-text available via subscription   (Followers: 37)
Annual Review of Food Science and Technology     Full-text available via subscription   (Followers: 13)
Annual Review of Genomics and Human Genetics     Full-text available via subscription   (Followers: 23)
Annual Review of Phytopathology     Full-text available via subscription   (Followers: 10)
Anthropological Review     Open Access   (Followers: 23)
Anti-Infective Agents     Hybrid Journal   (Followers: 3)
Antibiotics     Open Access   (Followers: 9)
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: 10)
Aquaculture Environment Interactions     Open Access   (Followers: 2)
Aquaculture International     Hybrid Journal   (Followers: 23)
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: 5)
Aquatic Ecology     Hybrid Journal   (Followers: 33)
Aquatic Ecosystem Health & Management     Hybrid Journal   (Followers: 14)
Aquatic Science and Technology     Open Access   (Followers: 3)
Aquatic Toxicology     Hybrid Journal   (Followers: 21)
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: 8)
Archives of Natural History     Hybrid Journal   (Followers: 6)
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: 2)
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)
Artificial Photosynthesis     Open Access   (Followers: 1)
Asian Bioethics Review     Full-text available via subscription   (Followers: 3)
Asian Journal of Biodiversity     Open Access   (Followers: 4)
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: 3)
Asian Journal of Nematology     Open Access   (Followers: 4)
Asian Journal of Poultry Science     Open Access   (Followers: 3)
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: 6)
Autophagy     Hybrid Journal   (Followers: 2)
Avian Biology Research     Full-text available via subscription   (Followers: 4)
Avian Conservation and Ecology     Open Access   (Followers: 11)
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  
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: 15)
Biochimie     Hybrid Journal   (Followers: 7)
BioControl     Hybrid Journal   (Followers: 5)
Biocontrol Science and Technology     Hybrid Journal   (Followers: 5)
Biodemography and Social Biology     Hybrid Journal  
BioDiscovery     Open Access   (Followers: 2)
Biodiversitas : Journal of Biological Diversity     Open Access  
Biodiversity : Research and Conservation     Open Access   (Followers: 26)
Biodiversity Data Journal     Open Access   (Followers: 3)
Biodiversity Informatics     Open Access   (Followers: 1)
Biodiversity Information Science and Standards     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: 5)
Biofilms     Full-text available via subscription   (Followers: 1)
Biogeosciences (BG)     Open Access   (Followers: 10)
Biogeosciences Discussions (BGD)     Open Access   (Followers: 2)
Bioinformatics     Hybrid Journal   (Followers: 294)
Bioinformatics and Biology Insights     Open Access   (Followers: 11)
Bioinspiration & Biomimetics     Hybrid Journal   (Followers: 7)
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: 6)
Biological Control     Hybrid Journal   (Followers: 4)
Biological Invasions     Hybrid Journal   (Followers: 19)
Biological Journal of the Linnean Society     Hybrid Journal   (Followers: 18)
Biological Letters     Open Access   (Followers: 5)
Biological Procedures Online     Open Access  
Biological Psychiatry     Hybrid Journal   (Followers: 46)
Biological Psychology     Hybrid Journal   (Followers: 7)
Biological Research     Open Access  
Biological Rhythm Research     Hybrid Journal   (Followers: 2)
Biological Theory     Hybrid Journal   (Followers: 2)
Biological Trace Element Research     Hybrid Journal  

        1 2 3 4 5 6 7 8 | Last

Journal Cover
Aquaculture International
Journal Prestige (SJR): 0.591
Citation Impact (citeScore): 2
Number of Followers: 23  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1573-143X - ISSN (Online) 0967-6120
Published by Springer-Verlag Homepage  [2351 journals]
  • Enhanced growth rate and ulvan yield of Ulva pertusa using light-emitting
           diodes (LEDs)
    • Authors: Bao Le; Jong-Am Shin; Man-Gu Kang; Sangmi Sun; Seung Hwan Yang; Gyuhwa Chung
      Pages: 937 - 946
      Abstract: Light-emitting diode (LED) technology offers potential energy-efficient light sources for algal aquaculture. In this study, the growth rate and ulvan yield of Ulva pertusa used for broad commercial applications were enhanced in vitro. To investigate the response of Ulva to LEDs, algae were grown under white fluorescent, pure primary color LED, and mixed LED lights for 28 days. Ulva sp. under blue LED and white fluorescent light showed higher specific growth rate (SGR, 12% day−1) than other light sources, while the growth under mixed red-blue LED light was lower than that under white fluorescent lighting. Despite the differences in alga growth under LEDs and white fluorescent light, few differences are observed in N and P content among algae grown under any light source. U. pertusa showed tissue nitrogen and ulvan contents in the ranges of 4.4–6.7% and 20.4–25.1%, respectively, under all LED light treatments. The ulvan extracted from algae under blue LED showed high levels of antioxidant activity measured with 2,2-diphenylpicrylhydrazyl (DPPH) radical and hydrogen peroxide. Moreover, the ulvan obtained under different lights showed different monosaccharide compositions. Based on these results, LEDs should be considered as the main light sources for indoor seaweed cultivation.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0260-4
      Issue No: Vol. 26, No. 4 (2018)
  • Effects of salinity, stocking density, and algal density on growth and
           survival of Iwagaki oyster Crassostrea nippona larvae
    • Authors: Tao Wang; Qi Li; Jingxiao Zhang; Ruihai Yu
      Pages: 947 - 958
      Abstract: To determine the optimal salinity, stocking density, and algal density for hatchery culture of the Iwagaki oyster Crassostrea nippona larvae, three experiments with salinities of 14, 18, 22, 26, 30, and 34 practical salinity unit (PSU); stocking densities of 0.5, 1, 2, 4, 8, and 12 larvae ml−1; and algal densities of 10, 20, 40, and 100 × 103 cells ml−1 were designed, which included the developmental stages from newly hatched D-larvae to pediveligers. Results showed that larval growth of C. nippona was the fastest at a salinity of 26 PSU, and when salinity was adjusted to a level that was lower or higher than this salinity, survival and growth rate of larvae declined (P < 0.05), resulting both in a decreased mean shell length and a high mortality. Larval growth decreased significantly with increasing stocking density. Larvae reared at 4 larvae ml−1 had the smallest shell length (198.9 μm) and lowest survival rate (7.9%), whereas larvae reared at 0.5 larvae ml−1 had the largest shell length (245 μm) and highest survival rate (66.3%) on day 13. And the shell length of larvae reared at 0.5 and 1 larvae ml−1 was significantly (P < 0.05) larger than the values in other treatments, except those reared at 2 larvae ml−1 (P > 0.05). When feeding the single-algal diet of Isochrysis galbana (clone T-ISO), the shell length of larvae increased markedly as the algal density was increased. Larvae reared at the highest algal density (100 × 103 cells ml−1) had the largest mean shell length; however, under the conditions of our experiment, there was no significant difference (P > 0.05) in growth and survival rates between the treatments at algal densities of 40 × 103 and 100 × 103 cells ml−1. For a large-scale culture, based on the results of this study, a salinity of 26 PSU, stocking density of 0.5–1 larvae ml−1, and algal density of 40 × 103 cells ml−1 are recommended for an early development of C. nippona.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0261-3
      Issue No: Vol. 26, No. 4 (2018)
  • In vitro and in vivo evaluation of probiotic properties of Enterobacter
           cloacae in Kenyi cichlid, Maylandia lombardoi
    • Authors: Nisha Rajagopalan Girijakumari; Kannapiran Ethiraja; Prabhu Narayanasamy Marimuthu
      Pages: 959 - 980
      Abstract: In this study, Enterobacter cloacae bacterium was isolated from curd and its antibacterial potential against the pathogen Plesiomonas shigelloides was evaluated using the freshwater ornamental fish Kenyi cichlid (Maylandia lombardoi). Among the bacterial isolates, E. cloacae exhibited tolerance to acidic pH 2 and demonstrated the highest antibacterial activity against P. shigelloides in various in vitro assays. Dietary supplementation of E. cloacae with prebiotic supplement 2% mannan oligosaccharide improved the growth performance and reduced the toxic metabolites such as nitrite in culture tank water of Kenyi cichlid. In vivo application of E. cloacae with mannan oligosaccharide significantly elevated (p < 0.05) white blood cell counts (88.47 ± 2.15 103 mm−3) and respiratory burst activity (0.243 ± 0.007) of Kenyi cichlid when challenged with P. shigelloides. Intestinal morphology of Kenyi cichlid fish treated with probiotic and prebiotic combinations showed improved intestinal architectures. The present findings confirm that the isolated bacterium E. cloacae is a potential probiotic and can be used effectively to prevent infection of P. shigelloides in freshwater ornamental fish culture.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0262-2
      Issue No: Vol. 26, No. 4 (2018)
  • Inorganic nitrogen control, growth, and immunophysiological response of
           Litopenaeus vannamei (Boone, 1931) in a biofloc system and in clear water
           with or without commercial probiotic
    • Authors: Gang Liu; Zhangying Ye; Dezhao Liu; Songming Zhu
      Pages: 981 - 999
      Abstract: A 5-week feeding trial was conducted to evaluate the effects of biofloc in situ and commercial probiotic supplementation on white shrimp (1.87 ± 0.03 g) inorganic nitrogen control, growth, and immunophysiological response. For this purpose, four treatments were conducted: clear water with no probiotic application (CW), clear water with probiotic application (CW+P), biofloc with no probiotic application (FLOC), and biofloc with probiotic application (BFT+P); each group had three replicates. Growth parameters (final body weight, daily weight gain, specific growth rate) were significantly higher in the two biofloc systems (P < 0.05), and the FLOC and FLOC+P group did not have a significant difference (P > 0.05). The immune responses (total hemocyte count, complement component protein, and lysozyme) and antioxidant status (glutathione, catalase) in the CW+P, FLOC, and FLOC+P groups were increased significantly at the end of the experiment compared with the CW group (P < 0.05), and the FLOC and FLOC+P groups did not have a significant difference (P > 0.05). Results of a 10-day Vibrio harveyi challenge test show that the survival rates in CW+P, FLOC, and FLOC+P groups were significantly higher (P < 0.05), and the FLOC and FLOC+P groups did not have a significant difference (P > 0.05). These results suggest that probiotic addition in the biofloc system had little advantage, but probiotics can improve the immune status of the shrimp in the clear water system. Further, cost-effectiveness analysis showed that the biofloc system was an efficient and economical option for the production of white shrimp.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0263-1
      Issue No: Vol. 26, No. 4 (2018)
  • Nutritional effect of Artemia nauplii enriched with Tetraselmis suecica
           and Chaetoceros calcitrans microalgae on growth and survival on the river
           prawn Macrobrachium americanum larvae
    • Authors: Yuniel Méndez-Martínez; Marcelo Ulises García-Guerrero; María Concepción Lora-Vilchis; Luis Rafael Martínez-Córdova; Fabiola Guadalupe Arcos-Ortega; Juan José Alpuche; Edilmar Cortés-Jacinto
      Pages: 1001 - 1015
      Abstract: The nutritional value of nauplii and metanauplii I of Artemia enriched with microalgae as food for freshwater prawn larvae (Macrobrachium americanum) was tested. The larvae were fed with three different diets consisting of Artemia nauplii (D1), Artemia metanauplii I enriched with Tetraselmis suecica (D2), and Artemia metanauplii I enriched with Chaetoceros calcitrans (D3) from zoea (Z)II. Growth showed differences since the third week, and the highest and lowest growth was observed with D3 and D1, respectively. The first metamorphosis to post-larvae appeared with treatment D3 at 9 weeks. Survival showed differences at the first week with D1 and D3 treatments, and D2 showed the best survival up to week 4. From the sixth week to the end, treatment D3 reached the highest survival. With treatments D1 and D2, all larvae died at the 9th and 10th week, respectively. D3 was the most effective of the three diets.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0264-0
      Issue No: Vol. 26, No. 4 (2018)
  • Dietary inclusion of hydrolyzed soybean and cottonseed meals influence
           digestion, metabolic enzymes, and growth-related hormones and growth of
           juvenile turbot ( Scophthalmus maximus )
    • Authors: Zhidong Song; Peiyu Li; Jiying Wang; Yongzhi Sun; Chengqiang Wang
      Pages: 1017 - 1033
      Abstract: To investigate the effects of a mixture of hydrolyzed soybean and cottonseed meals (HSC) on the digestion, metabolic enzymes, growth-related hormones, and growth of turbot (Scophthalmus maximus) (initial weight ca 35 g), six isoenergetic (ca 20 kJ/g) and isoproteic (ca 45%) diets were formulated with 0 (control), 14.7% (HSC14.7), 29.4% (HSC29.4), 44.1% (HSC44.1), 58.8% (HSC58.8) HSC, and 44.1% its native protein (SC44.1). Each diet was assigned to triplicate tanks with 36 fish per tank in a re-circulating system. Fish were fed twice daily. After 54 days, fish were weighed after a 24-h fast, and five digestive tracts were dissected for digestive enzyme analysis. Six blood and liver samples were collected from remaining 31 fish at 5 h post-feeding for metabolic enzymes and hormones analysis. The results showed that fish fed diets containing 14.7–44.1% HSC had higher average weight gain (g) (38.77–41.52 vs 29.74) but lower feed conversion rate (0.83–0.88 vs 1.02) than fish given the control diet. The HSC diets increased apparent digestibility coefficients of dry material, protein, and energy from 73.82% to 80.03%, 87.38% to 93.68%, and 76.13% to 81.46%, respectively. Pepsin and trypsin activities (U mg prot−1) were higher in group HSC14.7 (4.94 vs 4.26, 141.66 vs 115.14) than in the control group. The HSC44.1 and HSC58.8 diets increased the serum insulin level (IU L−1) (5.38, 5.50 vs 4.05), as well as the activities (U g prot−1) of hepatic alanine transaminase (868.42, 938.71 vs 730.82), aspartate transaminase (793.84, 854.64 vs 600.30), and glucokinase (104.76, 109.17 vs 93.90). The HSC diets reduced glucose 6 phosphatase activity (262.27–383.81 vs 537.21, U g prot−1) but increased phosphofructokinase activity (1592.55–1983.71 vs 978.52, U g prot−1). The HSC29.4 diet increased insulin-like growth factor 1 level (187.30 vs 151.17, ng L−1). Fish fed the SC41.1 diet exhibited lower growth performance and diet utilization than those fed the HSC44.1 diet. In conclusion, juvenile turbot can efficiently utilize HSC, and the recommended inclusion level is 27.14–30.70%.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0265-z
      Issue No: Vol. 26, No. 4 (2018)
  • Influence of porosity of low-density polyethylene media on the maturation
           process of biofilters used in recirculating aquaculture systems
    • Authors: Túlio Pacheco Boaventura; Kleber Campos Miranda-Filho; Rodrigo Lambert Oréfice; Ronald Kennedy Luz
      Pages: 1035 - 1049
      Abstract: The effect of pores with different diameters in polyethylene media on the process of ammonia nitrification during the maturation of biofilters is evaluated. Four types of media were produced: M1 without pores, M2 with 40–112 μm in diameter pores, M3 with 125–187 μm diameter pores, and M4 with 312–437 μm diameter pores. Ammonia concentrations were statistically equal among media. On the majority of days, nitrite concentrations were lowest for M1 and M2, intermediate for M3, and highest for M4. Increased pore diameter favored the formation of biofilm in the interior, but the pores obtained in the expansion process were not interconnected, which may have caused low oxygenation of the water in the internal area. It was concluded that porosity did not reduce biofiltration time and did not increase the efficiency of nitrification of ammonia.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0266-y
      Issue No: Vol. 26, No. 4 (2018)
  • Photoperiod manipulation for the reproductive management of captive
           wolffish populations: Anarhichas minor and A. lupus
    • Authors: Bernard-Antonin Dupont Cyr; Helge Tveiten; Domynick Maltais; Grant W. Vandenberg; Nathalie R. Le François
      Pages: 1051 - 1065
      Abstract: This study provides new and practical information to implement the use of photoperiodic manipulation for the control of the sexual maturation of Canadian 6+ Atlantic wolffish (Anarhichas lupus) and 3+ first-time spawners spotted wolffish (Anarhichas minor) from Canadian and Norwegian populations. Wolffish reproductive cycle (gametogenesis and oocyte maturation and spermiation) was monitored for 23 consecutive months. Control groups were held under a 12-month simulated natural photoperiod and treatment groups under an 8-month compressed photoperiod. Plasma sex steroid concentrations (estradiol-17β and 11-ketotestosterone), oocyte diameter growth, and milt production were assessed monthly. For all groups under study, fish subjected to the compressed photoperiod spawned 2–6 months earlier than the controls. Complete out-of-shift cycle was not achieved based on the completion of two reproduction cycles, and this is briefly discussed. Photoperiod treatment induced temporal shifts in sex steroid profiles, which are the likely mediators of altered timing of ovulation/final maturation. Photoperiod has a strong influence on the timing of wolffish maturation and could be used as an efficient and inexpensive tool to secure wolffish reproduction operations (year-round supply of egg and milt and/or timing with optimal temperature regimes).
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0267-x
      Issue No: Vol. 26, No. 4 (2018)
  • Energy metabolic enzyme responses of Litopenaeus vannamei to thermal
           stress: a comparative study in freshwater and seawater conditions
    • Authors: Xu-Ying Jia; Da-Sen Zhong; Dan Zhang; Fang Wang; Wen-Li Zhou
      Pages: 1067 - 1081
      Abstract: To investigate the effect of hypothermal (22 → 16 °C) and hyperthermal (22 → 28 °C) stress on the energy regulation of Litopenaeus vannamei cultured in long-term freshwater, the activities of hexokinase (HK), pyruvate kinase (PK), lactic dehydrogenase (LDH), and succinate dehydrogenase (SDH) were determined and compared with those kept in seawater. Results showed that at the early stage of thermal stress, HK, PK, and LDH activities increased and then decreased. At the end of the trial (48 h), all enzyme activities except PK and LDH activities in shrimps cultured in freshwater returned to the pre-experiment level. Following temperature stress, SDH activity of shrimps cultured in freshwater and seawater all decreased first and then increased, and finally reached the pre-experiment level, while SDH activity in gills of shrimps cultured in seawater was significantly lower than that before. At a constant temperature of 22 °C, compared with shrimps cultured in seawater, those cultured in freshwater had a lower level in HK, PK, and SDH activities, but a higher level in LDH activity. In summary, shrimps cultured in freshwater might rely more on anaerobic metabolism, while the opposite was true for glycolysis and aerobic metabolism. Because shrimps cultured in freshwater had a higher sensitivity to thermal stress, noticeable temperature variation especially when temperature decrease should be avoided in the freshwater intensive culture of L. vannamei.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0268-9
      Issue No: Vol. 26, No. 4 (2018)
  • PGF 2α and gonadal steroid plasma levels of successful and unsuccessful
           spawning Piaractus mesopotamicus (Teleostei, Characiformes) females
    • Authors: Rafael Yutaka Kuradomi; Sergio Ricardo Batlouni
      Pages: 1083 - 1094
      Abstract: Gonadal steroid and prostaglandin F2α (PGF2α) plasma levels were evaluated in successfully (SP) and unsuccessfully ovulated (UN) female Piaractus mesopotamicus. Forty-one females were injected with crude carp pituitary extract (0.6 and 5.4 mg kg−1 with a 24-h interval between the doses) and sampled to determine the plasma concentration of 17β-estradiol (E2), 17α-hydroxyprogesterone (17α-OHP), 17α,20β-dihydroxy-4-pregnen-3-one (DHP), PGF2α, and testosterone (T) after each injection (first—A1 and second—A2), and at the time of ovulation for SP and UN. Two clusters were obtained using multivariate analysis: 1—composed of all A1, all A2, and some UN; and 2—composed of all SP and some UN. Median values of E2 plasma levels were similar between clusters; however, plasma levels of T, 17α-OHP, DHP, and PGF2α of cluster 2 (predominantly formed by SP) were higher than those of cluster 1. Since cluster 2 contained all SP and females of this cluster presented higher levels of PGF2α, T, 17α-OHP, and DHP, here we evidently shown in an unprecedented manner that concomitant increased levels of these substances were associated with successful ovulation in this species, but such an increase was not determinant for successful ovulation due to the presence of some UN females in the same cluster 2. These findings highlight the unexplored potential of PGF2α to be used as an accessory tool for inducing successful ovulation for fish farming purposes.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0269-8
      Issue No: Vol. 26, No. 4 (2018)
  • Evaluation of potential probiotics isolated from saline tilapia in shrimp
    • Authors: Alvin M. Doroteo; Fiona L. Pedroso; James David M. Lopez; Mary Jane S. Apines-Amar
      Pages: 1095 - 1107
      Abstract: Integration of tilapia to shrimp culture is currently being practiced to minimize the growth of pathogenic luminous bacteria. The microorganisms that are associated in tilapia may contribute to the inhibition of the growth of Vibrio harveyi through the production of secondary metabolites. In this study, two Bacillus strains (MJA1.1, MJA2.1) isolated from mucus of tilapia were evaluated for their possible application in shrimp culture. The inhibitory property of these isolates against V. harveyi was determined in vitro using co-culture assay in a liquid medium. Also qualitative extracellular enzyme assay was conducted to assess whether the bacterial isolates produce extracellular enzymes. Furthermore, the potential use of these isolates as shrimp feed additive was tested. Thereafter, shrimps were exposed to lethal dose of ammonia (140 mg l−1) to test the effects of the isolates in vivo. The results showed that in vitro co-culture assay after 72 h caused a significant decline in the population of V. harveyi in treatments with potential probiotic isolates. Both isolates showed protease, amylase, and cellulase activities. Although no significant difference was observed in growth, survival was significantly higher in shrimp fed with diets added with either of the isolates. The shrimp exposed to lethal dose of ammonia demonstrated better survival when supplemented with the probionts compared to the control group. Thus, the efficiency of the isolates in inhibiting V. harveyi population and the improvement of survival and resistance of cultured shrimp to ammonia stress indicate their potential as probionts for shrimp culture.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0270-2
      Issue No: Vol. 26, No. 4 (2018)
  • Effect of diet and rearing conditions on growth and survival throughout
           developmental stages of larvae and juveniles of dusky grouper Epinephelus
           marginatus (Lowe 1834)
    • Authors: Santiago Cabaleiro; Lucía Barreiro; Rubén Caamaño
      Pages: 1109 - 1118
      Abstract: Two rearing conditions, tank light-dimensions and diet, were tested in dusky grouper—larvae and juveniles—in order to improve larval rearing techniques for this species. Larvae reared in high-volume and fluorescent tubes showed the highest survival rate at 18 dph (17.67%, 16%). This might be due to a higher depth and less trapping area during surface death in high-volume tanks than in low volume. Besides, a 500-lx evenly distributed light with fluorescent tubes might improve survival rate at early stages rather than illumination with energy-efficient light bulbs (4.68%, 9.64%). Light bulbs created shaded areas with less illumination inducing low larval activity. First feeding was performed with minimum rotifer lorica width of 102 ± 10.2 μm. No mixed diet was supplied. Throughout metamorphosis, stress shock syndrome appeared to be the main cause of mortality. Diet A showed best growth and survival (4.1–7.36%) during this period probably due to its high HUFA content (9.5%). Contrary to what was observed during first stages, groupers showed best performance with lower illumination. Cannibalism was observed during this period in all culture conditions.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0271-1
      Issue No: Vol. 26, No. 4 (2018)
  • Microalgal paste production of the diatom Chaetoceros calcitrans using
           electrolytic flocculation method at optimum culture conditions
    • Authors: Milagros R. de la Peña; Annie Villa Franco; Hermoso P. Igcasan; Mary Dianne Grace N. Arnaldo; Ramil M. Piloton; Soledad S. Garibay; Vicente T. Balinas
      Pages: 1119 - 1134
      Abstract: The optimum culture conditions of the local strain Chaetoceros calcitrans were determined to improve biomass and reduce cost of production. Under outdoor culture conditions, higher cell density was attained when the cultures were enriched with Tungkang Marine Research Laboratory (TMRL) medium composed of cheap technical grade reagents and cultured at 25 g L−1 salinity. The cultures were lighted with two 40 W cool-white GE fluorescent tubes (24–35 μmol photon m−2 s−1). Using semi-continuous culture system under established optimum culture conditions, C. calcitrans can be re-cultured thrice and concentrated at each culture cycle using electrolytic flocculation method to produce 4.6 kg m−3 of diatom paste. The viability of concentrated C. calcitrans after 3 months of storage was comparable to live diatom cells. Simple preservation technique by low-temperature storage is convenient for storing algal concentrates for use as starter cultures and for feeding invertebrates. The paste costs USD 8.24 kg−1 inclusive of the assets and flocculation materials for culturing and harvesting the diatom, respectively. This study established the suitable conditions for mass culture of C. calcitrans and produced concentrated diatoms in paste form that is readily available for aquaculture hatcheries at a lower cost.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0272-0
      Issue No: Vol. 26, No. 4 (2018)
  • Design and practical test of a compact phosphorus elimination module for
           freshwater RAS discharge water
    • Authors: Andreas Müller-Belecke; Sebastian von Plessen; Gregor Schmidt; Carsten Kühn; Andreas Spranger
      Pages: 1135 - 1145
      Abstract: Recirculating aquaculture systems (RAS) can emit total phosphorus (TP) concentrations in their discharge water, which exceed environmentally tolerated restrictions. A compact phosphorus (P) elimination module has been developed and its performance has been tested using the discharge water from a commercial scale freshwater RAS for pike perch (Sander lucioperca) production. To enable its widespread and easy use in practical conditions, the standard principle of chemical-physical phosphorus elimination was adapted to the conditions prevalent in RAS operations. The effect of different precipitants and flocculants in RAS discharge water was studied in laboratory trials. When it came to the TP-elimination performance and the environmental impact, the combination of iron(III) chloride and calcium hydroxide proved highly suitable as the precipitation and flocculation agents. Based on the results that were obtained, a commercial scale P-elimination module was designed. The module was equipped with a 500-L hopper-bottomed reaction tank, dosing units for the precipitation and flocculation agents and valves for the automatic discharge of sludge and cleared water. The TP-elimination potential in different operational modes and retention times was examined. The amounts of excess sludge and cleared water quality were evaluated. The designed 500 L P-elimination module works in automatic batch mode and enables operators to eliminate approx. 95% of the phosphorus emissions from the discharge water from a RAS for annual fish production of about 20 to 25 t. It was possible to achieve TP concentrations of below 1 mg L−1 in the module’s cleared water discharge.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0273-z
      Issue No: Vol. 26, No. 4 (2018)
  • The immune modulatory effect of oregano ( Origanum vulgare L.) essential
           oil on Tilapia zillii following intraperitoneal infection with Vibrio
    • Authors: Mahmoud Abd Elaziz Mabrok; Ali Wahdan
      Pages: 1147 - 1160
      Abstract: The current study aimed to evaluate the possible effect of Origanum essential oil on innate immune parameters as well as the hematological profiles of Tilapia zillii following challenge with Vibrio anguillarum. Fifty-four of Tilapia zillii weighing 180 ± 10.2 g were randomly distributed into three identical closed recirculating seawater systems. The study included three groups (G1, G2, and G3) repeated in triplicates. Fish of the first two groups were fed on a basal diet without herbs, whereas fish of the last group were fed on a basal diet supplemented with Origanum essential oil at concentration 1 g kg−1 for 15 days. Subsequently, fish of G2 and G3 subjected to a peritoneal inflammation by intraperitoneally injecting V. anguillarum (5.5 × 105 CFU mL−1), whereas fish of G1 injected with saline and served as control. Fish of all groups were then sampled at 4, 12, and 24 h post injection. No mortalities were observed in both basal and Origanum fed groups. However, some specimens of fish fed basal diet showed dorsal fin erosions, eroded mouth, and detached skin. Although the kinetics of RBCs, WBCs, Hb, and differential leukocyte values remained unchanged in fish fed different diets at the beginning of the trial, significant increases in those values were observed in fish fed Origanum essential oil at 12 and 24 h post injection. Similarly, an augmentation of plasma proteases, antiproteases, and lysozyme activities were recorded in fish fed Origanum essential oil at the same particular sampling points. A significant enhancement in plasma bactericidal capacity was only recorded in fish fed Origanum essential oil at 12 and 24 h post challenge compared to those fed basal diet. In conclusion, Origanum essential oil had a pronounced influence on the innate immunity and increased the fish resistance to V. anguillarum. These data gave insight into the potential use of Origanum in prophylactic strategies against threatening pathogens.
      PubDate: 2018-08-01
      DOI: 10.1007/s10499-018-0274-y
      Issue No: Vol. 26, No. 4 (2018)
  • Bait-subsidized diets and their effects on ovigerous North American
           lobsters ( Homarus americanus )
    • Authors: Jason S. Goldstein; Jeffrey D. Shields
      Abstract: Ovigerous American lobsters (Homarus americanus) display a protracted period of ovary maturation and maternal care when incubating their eggs, potentially influencing offspring fitness. Lobsters consume a wide range of food items; however, trap bait may comprise a larger proportion of their diet in some fished areas compared to non-fished areas, and the long-term consequences of a bait-based diet remain largely unexplored in lobsters. We tested the hypothesis that disproportionate amounts of bait in the diets of pre-ovigerous females affect the quality of their ovaries and eggs. We held pre-ovigerous lobsters (n = 29) over a period of ~ 300 days (range = 270–378) and fed them diets of herring bait, natural prey items (crab, mussel, urchin, macroalgae), or a combination of both diet types. Nutritional status, measured as biweekly blood indices and total glucose levels, suggest differences between lobsters fed a natural or combination diet and lobsters fed a bait-based diet (ANOVA; P < 0.05). We found that bait diets contained more protein (58.5%) and lipids (31.6%) compared to natural diets (34.5 and 13.2%, respectively) and lipid levels in ovaries and eggs significantly correlated with each other for all treatments (r = 0.76, n = 15, P = 0.028). Histopathological analysis indicates that ovaries contained more variable maturation in starved lobsters or those fed with bait, with some animals showing delayed gonad maturation. Results suggest that a varied diet promotes the overall fitness of ovigerous lobsters and the associated reserves that are used for ovarian development and subsequent oocyte formation.
      PubDate: 2018-07-11
      DOI: 10.1007/s10499-018-0285-8
  • Influence of different microalgal diets on gonadal development of the
           carpet shell clam Ruditapes decussatus broodstock
    • Authors: Ahmed S. A. Abbas; Eman El-Wazzan; Amal R. Khafage; Abdel-Fattah M. El-Sayed; Fatma A. Abdel Razek
      Abstract: Studies considering broodstock conditioning of Ruditapes decussatus mostly used flagellates and diatoms for feeding, mainly Isochrysis galbana and Chaetoceros calcitrans, respectively. The present study evaluated the effect of different microalgal diets on gonadic maturation of R. decussatus including three microalgae species (C. calcitrans, Tetraselmis suecica, and Nannochloropsis oculata) which were used to prepare six diets: three monospecific and three bispecific mixed diets at a proportion of 1:1. Clams were daily fed at a ratio of 1% dry weight of algae/live weight of clam and unfed treatment was used as control. Results showed that clams fed C. calcitrans alone or mixed with T. suecica attained earlier full maturity with the highest response to spawning induction (after 34 conditioning days) and largest proportion in the partial spawning phase for both, followed by T. suecica alone after 48 days. In contrast, N. oculata alone or mixed diets demonstrated poor performance for gonadal maturation. Unfed treatment did not show any sign of maturation. The results indicated that T. suecica has high conditioning potential like C. calcitrans and their mixture gave the highest benefit. Therefore, T. suecica can be recommended for R. decussatus broodstock conditioning.
      PubDate: 2018-07-07
      DOI: 10.1007/s10499-018-0284-9
  • Impact of food type on growth, survival and reproduction of the cyclopoid
           copepod Cyclopina kasignete as a potential live food in aquaculture
    • Authors: Nadiah W. Rasdi; Jian G. Qin
      Abstract: This study compared the efficacy of different dietary algae on the growth and reproduction of the cyclopoid copepod Cyclopina kasignete, a potential live food species for fish larvae in aquaculture. The experimental diets for the copepod consisted of three monoalgal diets (Nannochloropsis oculata, Tisochrysis lutea and dry Melosira sp.) and two mixed algae diets (T. lutea + N. oculata, T. lutea + dry Melosira sp.). The experiment was carried out for 30 days, and the population growth, survival and reproductive performance (generation time, hatching rate, life spawning times, daily offspring production, eggs per sac, lifespan and sex ratio) were used to assess the responses of C. kasignete to different food types. Population growth, survival and reproductive capacities of C. kasignete were significantly affected by the mono and binary species of algal diets. The results showed that copepods exhibited superior growth, survival and productivity when fed on fresh T. lutea, dry Melosira sp. and a mixture of both species compared to other dietary treatments. Copepods produced comparable growth, survival and productivity when fed on diatoms (dry Melosira sp.) as a single or in combination with other algae. This study indicates that cyclopoid copepod C. kasignete grow fast and have the potential to serve as a live food for aquaculture. The algae T. lutea, dry Melosira sp. and their combination are appropriate food to sustain the growth and reproduction of this copepods in mass culture as a potential live food in fish hatchery.
      PubDate: 2018-07-02
      DOI: 10.1007/s10499-018-0283-x
  • Microalga Isochrysis galbana in feed for Trachinotus ovatus : effect on
           growth performance and fatty acid composition of fish fillet and liver
    • Authors: Yongjin He; Gang Lin; Xiaozhen Rao; Langjun Chen; Huang Jian; Mingzi Wang; Zheng Guo; Bilian Chen
      Abstract: Seeking alternatives to the depleting fish oil are crucial for marine fish aquaculture, which is currently dependent on fish oil as the primary source of n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFAs). Five isonitrogenous (46% crude protein) and isolipidic (16% crude lipid) feed diets (FO, ISO2.9, ISO4.8, ISO6.7, ISO8.6) were formulated by partially replacing fish oil with microalgae Isochrysis galbana. These diets were fed to triplicate tanks of Trachinotus ovatus (mean initial weight 1.92 g) for 80 days. This work demonstrates that a moderate inclusion (around 4.5–5.0 wt%, equivalent to the replacement of 24–26 wt% fish oil) of I. galbana biomass in fish diet improves fish growth performance, lipid deposition and enhances total n-3 fatty acids, DHA, and EPA contents in neutral and polar lipids (PLs) of fish muscle and liver of T. ovatus. The results disclosed in this study suggest that I. galbana microalgae represents a potential high-quality substitute for fish-based ingredients in aquaculture feeds, which can be a promising sustainable solution to resolve the depleting fish oil resource in a cost-effective manner.
      PubDate: 2018-06-25
      DOI: 10.1007/s10499-018-0282-y
  • Effect of stocking density on growth performance, serum biochemical
           parameters, and muscle texture properties of genetically improved farm
           tilapia, Oreochromis niloticus
    • Authors: Fan Wu; Hua Wen; Juan Tian; Ming Jiang; Wei Liu; Changgeng Yang; Lijuan Yu; Xing Lu
      Abstract: The objective of this study was to assess the effects of stocking density on growth performance, serum biochemical parameters, and muscle texture properties of genetically improved farmed tilapia (Oreochromis niloticus, GIFT). Juvenile GIFT with an average initial weight of 12.54 ± 0.45 g (mean ± SD) were randomly stocked in 16 tanks (80 L) in a recirculation aquaculture system at four densities of 10 (D1), 20 (D2), 30 (D3), and 40 (D4) fish per tank for 56 days, with quadruplicate for each density. There were no significant differences in water temperature among the four treatments (P > 0.05). D4 had the significantly lowest dissolved oxygen content (5.52 vs 5.69–6.09 mg L−1) (P > 0.05) and pH (6.63 vs 6.87–7.20) (P < 0.05). NO2-N and NH4-N concentrations significantly increased with increasing stocking density (P < 0.05). Weight gain (WG) and specific growth rates (SGR) decreased with increasing stocking density. The lowest WG (617.20 vs 660.45–747.06%), SGR (3.52 vs 3.62–3.81% day−1), and highest feed conversion ratio (1.68 vs 1.53–1.58) were observed in D4. Fish at D4 had significantly lower condition factor (3.11 vs 3.29–3.37%) and survival rate (91.25 vs 97.50%) than those from D1 and D2 (P < 0.05). With increasing stocking density, serum total cholesterol, triglyceride, and total protein concentrations decreased (P < 0.05) and aspartate aminotransferase and alanine aminotransferase activities increased (P < 0.05). D4 fish had higher moisture content (78.80 vs 76.97%) and lower crude protein content (18.14 vs 19.39%) in muscle than D1 fish (P < 0.05). Compared to D1 and D2, D3 and D4 had lower muscle hardness (1271.54–1294.07 vs 1465.12–1485.65 g), springiness (0.62–0.65 vs 0.70–0.72), gumminess (857.33–885.32 vs 1058.82–1079.28 g), and chewiness (533.04–577.09 vs 757.53–775.69 g) (P < 0.05). High stocking density resulted in growth inhibition, declines in flesh quality, and disturbance to several serum biochemical parameters.
      PubDate: 2018-06-21
      DOI: 10.1007/s10499-018-0281-z
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