Recursos de colección

Aquatic Commons (41.069 recursos)

The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.

Subject = Aquaculture

Mostrando recursos 1 - 20 de 577

  1. The effects of different dietary levels of organic and inorganic selenium on some growth performance and proximate composition of juvenile rainbow trout (Oncorhynchus mykiss)

    Nazari, K.; Shamsaie, M.; Eila, N.; Kamali, A.; Sharifpour, I.
    Selenium, a trace mineral complement is used as cofactor of antioxidant enzymes that protects fishes against environmental stress agents and enhances performance in fishes. In this study the different levels of organic and inorganic source of selenium were included in juvenile rainbow trout diet to evaluate feed conversion ratio (FCR), specific growth rate (SGR), weight gain percent (WG), condition factor (CF), survival rate (SR) and proximate analysis of the fillet during 60 days of the experiment. The fishes were allotted to 9 treatment groups including: Tc the fishes were fed diet without any selenium, control group; To1, To2, To3 and...

  2. The effect of ethanol extract of a macroalgae Laurencia snyderia on growth parameters and vibriosis resistance in shrimp Litopenaeus vannamei

    Dashtiannasab, A.; Yeganeh, V.
    Bacterial diseases have been reported to be the major limiting factor in shrimp production. The use of natural products such as antimicrobials has been reported as a solution to the problem. The crude extract of a red seaweed Laurencia snyderiae obtained from the Persian Gulf was evaluated for shrimp growth performance and to determine in vivo efficacy of this seaweed in the prevention of shrimp Vibriosis. The ethanol extract from L. snyderiae (EELS) that was fed to the Artemia instar I for their enrichment was found to be non toxic to them. Shrimp Litopenaeus vannamei juveniles were fed with these...

  3. The hematological improvement of rainbow trout (Oncorhynchus mykiss) during dietary supplementation with vitamin C after exposure to zinc nano-particles

    Chahardeh Baladehi, E.; Hedayati, S.A.A.; Kolangi Miandare, H.; Bagheri, T.
    The aim of this study was to examine the adverse effects of zinc nanoparticles on hematological indices of trout and investigate the improvement of these indices after vitamin C treatments. This study assesses the protective role of vitamin C in fish exposed to ZnO NPs. Two concentrations of ZnO-NPs (40 and 80 mg L^-1) and two doses of vitamin C (400 and 800 mg per kg of feed) were used to treat 162 specimens of Oncorhynchus mykiss. No mortality was observed during the test. After 5 and 10 days of exposure, hematological data were analyzed according to routine clinical methods....

  4. The effects of Pediococcus acidilactici as a probiotic on growth performance and survival rate of great sturgeon, Huso huso (Linnaeus, 1758)

    Zare, A.; Azari-Takami, G.; Taridashti, F.; Khara, H.
    This study was accomplished to investigate the effect of Artemia urmiana nauplii enriched with Pediococcus acidilactici as probiotic on growth performance and survival rate of great sturgeon, Huso huso. Artemia nauplii were enriched with P. acidilactici at a final concentration of 10^10 CFU mL^-1 in three time dependent treatments as 3 h (T3), 6 h (T6), 9 h (T9), and one non-enriched Artemia as the control treatment. All treatments were considered in triplicates. Since the nauplii enriched for 9 hours (T9) had the most significant CFU/g compared to other treatments (p<0.05), juvenile beluga at the stage of first feeding with...

  5. Determination of the inhibitory effects of microdiets used in routine commercial feeding protocols on protease activities of Argyrosomus regius (Asso, 1801) larva

    Diken, G.; Demir, O.; Naz, M.
    The aim of this study was to determine the inhibitory effects of feed ingredients on protease activities of Argyrosomus regius larvae using in vitro techniques. A. regius larvae fed on a commercial feeding procedure were sampled thirteen times, during the sampling period (from 3 to 32 days after hatching (DAH)). The differences observed in protease activities of meagre larvae during the sampling period were statistically significant (p<0.05). The lowest and highest protease activities of meagre larvae were 5.95±0.6 U/mg protein (15 DAH) and 211.21±12.56 U/mg protein (7 DAH), respectively. The fluctuations observed in protease activities of A. regius larvae were...

  6. Effects of Zingiber officinale powder on growth parameters, survival rate and biochemical composition of body in juvenile common carp (Cyprinus carpio)

    Abbasi Ghadikolaei, H.; Kamali, A.; Soltani, M.; Sharifian, M.
    This study was conducted with different levels (0, 0.25, 0.5, 1, 2 g) of Zingiber officinale powder per 100 g of common carp commercial diet. Feed was offered for 8 weeks by the post pelleting liquid spraying method. Results showed that there were significant differences in all growth parameters and body composition except in survival rate, Gain Weight Percent (GW%), SGR and NFE between treatments (p<0.05). Significant differences were also detected in GW% between control group and the last two treatments but there were no significant differences in SGR index between control group and the group fed diets containing 2...

  7. Survival rates associated with in vitro low-temperature storage of kutum (Rutilus kutum) eggs

    Samarin, A.M.; Kazemi, R.; Nikbakhsh Golkhaily, J.; Policar, T.
    To study the effects of post-stripping oocyte ageing at low temperatures on the viability of kutum (Rutilus kutum) oocytes, unfertilised eggs of five females were stored in ovarian fluid at temperatures of 4 and 7 degrees centigrade for 24 hours post stripping (HPS). The stored ova of five female kutum were separately fertilised at 0 (i.e., control eggs fertilised prior to storage), 4, 8, 12, 16, 20, and 24 HPS. The eyeing and hatching rates were recorded as indices of the egg quality. The results indicated that the maximum eyeing and hatching rates of the eggs (92% and 74%, respectively)...

  8. An investigation on the effects of juvenile rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) monoculture and duo-culture farming in freshwater and seawater on growth performance

    Delihasan Sonay, F.; Başçınar, N.
    The objective of this study was to compare growth performance and feed conversion ratios of rainbow trout (Oncorhynchus mykiss) and brook trout (Salvelinus fontinalis) juveniles in monoculture and duo-culture in freshwater and seawater under aquarium conditions. The fish were about 2-months old hatchery-reared brook and rainbow trout with initial weights of 0.934±0.033 (n=360) and 1.014±0.019 (n=360) g, respectively. The juveniles were kept in 10 L aquaria. Each aquarium contained 40 fish: 40 fish from each species for monoculture, 20+20 (rainbow trout+brook trout) fish from each species for duo-culture. The fish were in 3 groups with three replicates in freshwater and...

  9. Safety evaluation of chloramine-T on ornamental zebra fish (Danio rerio) using LC50 calculation and organ pathology

    Alidadi Soleimani, T.; Sattari, A.; Kheirandish, R.; Sharifpour, I.
    The need of aquarists for proper and safe disinfection of fish with Chloramine-T (CL-T) necessitates toxico/pathologic examinations. This study assays toxicity level of CL-T and histopathologic changes of gills, liver, kidney and brain of treated zebrafish (Danio rerio). Groups of 10 Zebrafish were treated with 0 (control), 5, 10, 15, 30, 50, 100 and 200 mg/L of CL-T. Mortality was recorded at every 6 hours until 96h after the beginning of the treatment and lethal concentration for 50% of population (LC50 at 24h and 96h) was calculated. The histopathologic samples were taken from dying fish during the exposure period. Histopathological...

  10. Effect of the probiotic Entrococcus faecium on hematological and non-specific immune parameters and disease resistance in zander (Sander lucioperca)

    Faeed, M.; Kasra Kermanshahi, R.; Pourkazemi, M.; Darboee, M.; Haghighi Karsidani, S.
    The current study evaluated effects of dietary administration doses of Entrococcus faecium on the hematological factors, and disease resistance of Sander lucioperca against Aeromonas hydrophila infection. Fish were fed with dietary administration containing E. faecium doses including of (10^10, 10^8 CFU/g) for diet A1 and A2, respectively in a commercial diet as basal diet were used for 6 weeks. The control group was basal diet with serum. The hematological and immunity parameters were measured and fish were challenged with A. hydrophila (4.5×10^8 CFU/mL). Fish were monitored daily and the mortality rates were recorded over 8 days post-challenge. The results indicated...

  11. Environmental effects of the cold water fish farms effluents on the water quality of Gamasyab River as their main source of water supply in the west of Iran

    Danesh pajooh, R.; Reyahi Khoram, M.; Cheraghi, M.; Mohamad Poor Roodposhty, G.A.
    Rainbow trout (Oncorhynchus mykiss) is one of the most-widely cultivated cold fresh water fish in the world. Gamasyab River, with a length of about 200 Km, is one of the longest rivers of Iran. The aim of this research is to determine the effects of trout farm effluents on this river water. From a total of 24 trout farms in the area, four farms were randomly selected and three sampling stations were chosen at each selected farm. Measured water quality parameters were temperature (T), total suspended solids (TSS), total dissolved solid (TDS), dissolved oxygen (DO), pH, five-day biochemical oxygen demand...

  12. Diversity of eukaryotic plankton of aquaculture ponds with Carassius auratus gibelio, using denaturing gradient gel electrophoresis

    Dong, X.; Zhao, W.; Lv, L.; Zhang, H.; Lv, F.; Qi, Z.; Huang, J.; Liu, Q.
    PCR-denaturing gradient gel electrophoresis (DGGE) and canonical correspondence analysis (CCA) were used to explore the relationship between eukaryotic plankton community succession and environmental factors in two aquaculture pond models with gibel carp Carassius auratus gibelio. The main culture species of pond 1 were gibel carp and grass carp, and the combined density was 46224 fingerling/ha (gibel carp/grass carp/silver carp/bighead carp, 17:4:6:1). The main culture species of pond 2 was gibel carp, and the combined density was 37551 fingerling/ha (gibel carp/silver carp/bighead carp, 52:1:1). Water samples were collected monthly. The results showed that the annual average concentrations of TP and PO_4-P...

  13. Serum cortisol concentrations change in tiger grouper, Epinephelus fuscoguttatus in response to water temperature and salinity stress

    Nazarudin, M.F.; Aliyu-Paiko, M.; Shamsudin, M.N.
    The present exposition was designed to evaluate blood serum changes in tiger grouper, Epinephelus fuscoguttatus in response to changes in water temperature and salinity. Uniformly sized fingerlings were randomly distributed into different groups at fifteen fish per tank, in two replicates. Each group represented experimental fishes subjected to water temperatures of 18, 24, 28 and 30°C (control), and salinity of 10, 20 and 30 (control) ppt respectively. Replicate groups of fishes in each tank were exposed to these physiological stressors for 4 and 36 hours. At the end of experiment, blood samples were collected via caudal vein. The collected blood...

  14. Study on nursery growth performance of Pacific white shrimp (Litopenaeus vannamei Boone, 1931) under different feeding levels in zero water exchange system

    Khanjani, M.H.; Sajjadi, M.M.; Alizadeh, M.; Sourinejad, I.
    Effect of different feeding levels on water quality, growth performance, survival rate and body composition of Pacific white shrimp Litopenaeus vannamei post larvae were studied in zero water exchange system. Shrimp post larvae with mean weight of 74.46± 6.17 mg were fed for 32 days in 300L fiberglass tanks containing 130L water at density of 1 post larvae L^-1. There were five treatments including control and four biofloc treatments with different feeding levels of 15%, 15%, 12%, 9%, 0% of body weight per day, respectively. The results showed that there were no significant differences in water parameters such as dissolved...

  15. Lecithin effects on blood biochemical parameters and resistance to thermal stress in juvenile of Mesopotamichthys sharpeyi (Cyprinidae family)

    Seiedzadeh, S.M.; Yavari, V.; Mohammadiazarm, H.; Mousavi, M.
    In this study, the effects of dietary chicken egg lecithin on some blood biochemical factors of Mesopotamichthys sharpeyi juveniles and resistance to thermal shock was investigated. Juveniles with initial average weight of 3.10±0.17 were stocked in 12 fiberglass tanks. Four isolipidic and isonitrogenic diets containing 0% (control), 2%, 4% and 6% chicken egg lecithin were used to feed the fish 3 times per day to satiation during 90 days. Total protein, cholesterol, high density lipoprotein (HDL) and albumin levels were significantly higher (p<0.05) in juveniles fed 6% lecithin compared to the control diet. The triglyceride level was also significantly decreased...

  16. The effect of black glutinous rice bran (Oryza sativa L.) in diets of Nile tilapia (Oreochromis niloticus)

    Yuangsoi, B.; Rinthong, P.; Charoenwattanasak, S.
    The effect of black glutinous rice bran inclusion used in diets of Nile tilapia was studied in fish with an initial weight of 8.76±0.17g per fish and fed with experimental diets supplemented with black glutinous rice bran at 0 (control), 50, 100, 150 and 200 g kg^-1 for 60 days. The results of phytochemical analyses of black rice bran showed that the total anthocyanin, phenolic, tannin and phytic acid contents were 52.42±0.23, 3.77±0.03, 0.32±0.13, 0.14±0.01 mg/100g, respectively. The properties of black glutinous rice bran acted as an antioxidant, and the inhibitory percentage of 1,1-diphenyl-2-picrylhydrazyl (DPPH) and thiobarbituric acid reactive substances...

  17. Transcriptome analysis of the freshwater pearl mussel, Hyriopsis cumingii (Lea) using illumina paired-end sequencing to identify genes and markers

    Zhang, A.J.; Liu, S.L.; Zhu, J.Y.; Gu, Z.M.; Zhou, Z.M.; Zhang, G.F.; Lu, K.H.
    The transcriptome of triangle sail mussel Hyriopsis cumingii (Lea) using Illumina paired-end sequencing technology was conducted and analyzed. Equal quantities of total RNA isolated from six tissues, including gonad, hepatopancreas, foot, mantel, gill and adductor muscle, were pooled to construct a cDNA library. A total of 58.09 million clean reads with 98.48 % Q20 bases were generated. Clustering and assembling of these reads produced a non-redundant set of 92,347 unigenes with an average length of 1,150.61 bp. 11,174 unigenes were involved in the molecular function, cellular component and biological process categories by GO (Gene Ontology) analysis. Potential genes and their...

  18. A review on the role of inositol in aquaculture

    Shirmohammad, F.; Mehri, M.; Joezy-Shekalgorabi, S.
    Inositol is usually classified as an essential vitamin for most animals, and is recognised as a part of the B-complex vitamins. Among all other inositol isomer forms, myo-inositol possesses biological activity. It is found in the brain, skeletal, heart, and main reproductive tissues and exists as a structural component of phosphatidylinositol in biological cell membranes. Myo-inositol, also acts as a growth factor and affects the antioxidant capacity and oxidative status of cells. It is a major intracellular osmolyte that can be accumulated to protect cells from a variety of stresses and can also participate in transmembrane signal transfer. Myo-inositol is...

  19. Effects of stocking density, feeding technique and vitamin C supplementation on the habituation on dry feed of pikeperch (Sander lucioperca) pond reared juveniles

    Ljubobratovic, U.; Kucska, B.; Sandor, Z.; Peteri, A.; Ronyai, A.
    Influence of three different stocking densities, vitamin C supplementation of Daphnia spp. and feeding practice (i.e. mechanical, hand) on the success of dry feed habituation of pond reared pikeperch juveniles was investigated through one month trial. Pond reared pikeperch juveniles were harvested 42 days post-fertilisation (mean individual weight 1.1 ± 0.3g) and stocked into the experimental recirculation system. For the stocking density trial, fish were stocked in three different initial densities of 0.5, 1 and 1.5 fish L^-1, while the trial on live food supplementation and feeding practice was performed with two two-group comparisons with one common control treatment. All...

  20. Effect of lactic acid bacteria and the potential probiotic Hafnia alvei on growth and survival rates of narrow clawed crayfish (Astacus leptodactylus Esch., 1823) stage II juveniles

    Didinen, B.I.; Bahadır Koca, S.; Metin, S.; Diler, O.; Erol, K.G.; Dulluc, A.; Koca, H.U.; Yigit, N.O.; Ozkok, R.; Kucukkara, R.
    The aim of this study was to screen potential probiotic bacteria against Aeromonas hydrophila and determine the effects of antagonistic bacteria and a commercial product containing lactic acid bacteria on the survival and growth of stage II Astacus leptodactylus juveniles. For this purpose, a total of 110 bacterial strains were isolated from adult, stage II crayfish juveniles and rearing water screened for antagonistic activities against A. hydrophila with well diffusion agar assay. Hafnia alvei strain from stage II crayfish juveniles displayed the inhibition zone (10mm) against A. hydrophila. The experiment was conducted in a completely randomized design with four treatments...

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