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  • 1
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    Changing olfactory preference by olfactory imprinting in Persian Sturgeon (Acipenser persicus) larvae (2019)
    Details
    Publication Date: 2021-05-19
    Description: Olfactory imprinting is one of the affordable approaches for improving neonatal feeding in husbandry. In order to evaluate the possibility of olfactory imprinting in the Persian sturgeon larvae and to evaluate its future application in the feeding of larvae, two groups of early fertilized eggs were exposed to the stimuli solution (phenyl ethyl alcohol (0.0001 mol/L) and the fish feed extract (0.01 g/L) until 29 days after hatching. The third group (control) exposed to neither stimuli solution nor the fish feed extract. Fish larvae behavior was examined in Ymaze at days 11 and 25 posthatch in order to evaluate the larvae preference/avoidance reactions to the stimuli solution and the fish feed extract. The results indicated that the exposed Persian sturgeon larvae did not show any preference/avoidance reaction at day 11 posthatch to the pertinent stimuli, whereas the exposed Persian sturgeon larvae preference was for the stimuli solution rather than the fish feed extract at day 25 posthatch (P〈0.05). The preference of larvae of the control group was for the fish feed extract rather than the stimuli solution at day 25 posthatch, whereas the exposed Persian sturgeon larvae preference was for the stimuli solution rather than the fish feed extract at day 25 posthatch. The average time of the larvae presence (value for reaction) in the arm containing the pertinent stimuli was significantly higher than the average time of the larvae presence in the arm containing the fish feed extract (P〈0.05). The result indicated that continues exposure of egg and larvae of the Persian sturgeon to the phenyl ethyl alcohol (0.0001 mol/L) and the fish feed extract (0.01 g/L) could change olfactory preference of the larvae at day 25 posthatch
    Description: Published
    Keywords: Persian sturgeon ; Acipenser persicus ; Y-maze ; Feeding larvae ; Olfactory imprinting
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.149-158
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  • 2
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    Effect of using different types of organic animal manure on plankton abundance, growth performance and survival of Carps fry in fiberglass tanks (2020)
    Details
    Publication Date: 2021-05-19
    Description: In this research, the effect of organic fertilizers was studied on the growth performance of carps fry. This experiment was conducted in a completely randomized design with seven treatments and three replications in 300 liters of tanks within 3 months. 60 pieces of fish fry with an average weight of 0.6 ± 0.05 g were randomly storage in each tank per 0.5: 1.5: 2: 6 (respectively, 5%, 15%, 20% and 60% respectively big head, grass carp, common carp, silver carp). Seven treatments were included control (C), vermicompost of 1 kg/m3 (T1), vermicompost fertilizer 1.5 kg/m3 (T2), compost fertilizer 1 kg/m3 (T3), compost fertilizer 1.5 kg/m3 (T4), cow manure 1 kg/m3 (T5), chicken manure 0.6 kg/m3 (T6) used in 3 replicates. Primary production, plankton and water quality parameters (temperature, chemical oxygen demand, dissolved oxygen, nitrogen-ammonium and phosphate) were measured weekly or twice weekly. At the end of the experiment period, the growth indices were measured. The results showed that the highest amount of dissolved oxygen, chlorophyll a concentration, phytoplankton and zooplankton was observed in T1 treatment and the lowest in control group (p〈0.05). The highest amount of benthos was observed in T6 treatment compared to other group. Based on the results, the best growth performance was observed in T1 treatment, except to T6 treatment with other treatments (p〈0.05). Overall, the results of this study suggest that vermicompost application of 1 kg/m3 can improve the quality parameters of water, plankton and performance of Carps fry.
    Description: Published
    Keywords: Cyprinus carpio ; Fish ; Growth ; Fertilization ; Fry ; Plankton
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.49-58
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  • 3
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    The effect of probiotic Pediococcus acidilactici on growth performance, blood and some serum parameters in Caspian salmon (Salmo trutta caspius) (2021)
    In:  http://aquaticcommons.org/id/eprint/22003 | 18721 | 2018-01-21 12:10:07 | 22003 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-06
    Description: The effect of probiotic Pediococcus acidilactici on growth performance, blood and some serum parameters on Caspian salmon (Salmo trutta caspius) was studied. An experiment was designed with five treatments each with three replicates. Two hundred and seventy Caspian salmons average (±SD) initial weight of 6.9 ± 0.1 g were assigned to fifteen experimental tanks. The experimental period was eight weeks. At the end of this period, the growth parameters were measured. In addition, after 8 weeks feeding on experimental diets, hematological parameters and metabolic products (cholesterol, glucose and total protein) were measured. Results showed that feed conversion in five treatments (0.4 g probiotic) significantly was lower than control group. Specific growth rate, final weight and weight gain in treatments (0.2 g) compared with the control group significantly increased. Use of probiotics in the diet, showed no significant differences in hemoglobin, hematocrit and mean cell hemoglobin concentration (MCHC). The mean cellular hemoglobin concentration (MCH) and mean corpuscular volume (MCV) were significantly increased in five treatments (0.4 g) compared with the control group, but significantly decreased red blood cell counts (RBC) in five treatments. White blood cells also increased the amount of probiotics 0.2 g. The results of this study indicated that 0.2 g/kg Pediococcus acidilactici probiotics in the diet could be a useful food supplement and should be used to improve the growth parameters in Caspian salmon.
    Keywords: Aquaculture ; Biology ; Pediococcus acidilactici ; Parameters ; blood ; Growth ; Caspian salmon ; Iran ; Salmo trutta caspius ; performance
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 35-44
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  • 4
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    Effects of starvation and refeeding on the hematological and serum parameters and body proximate composition of Caspian salmon (Salmo trutta caspius) fingerligs (2021)
    In:  http://aquaticcommons.org/id/eprint/22106 | 18721 | 2018-02-08 04:00:18 | 22106 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-26
    Description: This study was conducted to investigate the effects of periods of starvation and refeeding on some hematological, serum parameters and whole body proximate composition in Caspian salmon (Salmo trutta caspius). 240 samples of the Caspian salmon with an average weight of 13.73 ± 0.63 g were kept in 300 liter polyethylene tanks. Samples were fed twice a day with Rainbow trout commercial feed to the point of satiation. This experiment lasted for 10 weeks with control (without starvation) and 3 starvation treatments including 2, 4 and 6 weeks of starvation followed by 4 weeks of refeeding with 3 replicates. During rearing period, the average of water temperature, pH and dissolved oxygen were 14.15±0.27 ° C, 8.44±0.17 and 6.34±0.24 mgl-1, respectively. At the end of starvation period, the results of blood parameters showed that starvation significantly increased red blood cells and hematocrit in treatment with 2 weeks of starvation (0.893±0.58 × 106/mm3) and 6 weeks of starvation (42.33±3.21 %, P〈0.05), respectively. At the end of trial, the highest value of white blood cells belonged to 6 weeks starvation treatment (14.2±0.12 × 103/mm3) while the lowest (10±0.60 × 103/mm3) was observed in the control. Results of the biochemical serum parameters indicated the lowest amount of total protein (1.71±0.88 mg/dl) and glucose (41.35±1.44 mg/dl) were obtained in 6 weeks starvation treatment, right after the starvation period (P〈0.05). At the end of the starvation period, the whole body protein content of control was lower than other treatments (P〈0.05), but after 2 weeks of refeeding, whole body protein content of 2 and 4 weeks starvation treatments didn't show any significant difference compared to control (P〉0.05). At the end of the experiment, the lowest value of lipid belonged to starvation treatments while the highest value was observed in control (P〈0.05). Generally, this can be inferred that Caspian salmon fish can tolerate starvation for 2 weeks without any negative impact on blood and serum biochemical parameters and for 4 weeks on whole body proximate composition.
    Keywords: Aquaculture ; Biology ; Chemistry ; Caspian salmon ; starvation ; refeeding ; proximate composition ; blood ; parameters ; Salmo trutta caspius ; fingerligs ; hematological ; serum ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 161-174
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  • 5
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    The effects of replacing fish meal with barley protein concentrate on digestive enzyme activity and hepatic enzymes of Caspian salmon (Salmo trutta caspius) (2020)
    Details
    Publication Date: 2021-05-19
    Description: The effects of replacing fish meal with barley protein concentrate (BPC) on digestive enzyme activity and hepatic enzymes of Caspian salmon (Salmo trutta caspius) in a 8 week study with a weight mean 16.53±1.1g with completely a randomized design with 5 treatments and 3 replications was used. Experimental diets consisted of control diet (without barley protein concentrate) and four diets containing levels of 25, 50, 75, 100% barley protein concentrate. At the end of the experiment, ALP, AST and ALT levels was significantly different in different experimental treatments (p 〈0.05). However, there was no significant difference in LDH between different treatments (p 〉0.05).In fish fed with experimental diets pepsin enzyme activity in experimental diets up to 75% replacement with control treatment there was no significant difference (p 〈0.05). The activity of Chymotrypsin and Aminopeptidase in different treatments showed a significant difference compared to control (p 〉0.05). In fish fed with experimental diets up to 50% replacement in trypsin and alkaline phosphatase activity compared to control treatment was no significant difference (p 〈0.05). The activity of amylase and lipase enzymes showed a significant difference between treatments with different levels of barley concentrate (p 〈0.05). digestive enzymes decreased at higher replacement levels, but in the middle levels of replacement, there was less effectsin pancreatic enzymes. It can, therefore, be concluded that BPC levels up to 50% of the diet are tolerable for the Caspian salmon, but levels exceeding this limit will probably result in an increase in anti-nutrients,­ a decrease in nutrient uptake, low diet palatability, and adverse effects on fish growth.
    Description: Published
    Keywords: Salmo trutta caspius ; Fish ; Enzymes ; Diet ; Liver ; Weight
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.111-121
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  • 6
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    Effects of starvation and refeeding on the hematological and serum parameters and body proximate composition of Caspian salmon (Salmo trutta caspius) fingerligs (2017)
    Details
    Publication Date: 2021-05-19
    Description: This study was conducted to investigate the effects of periods of starvation and refeeding on some hematological, serum parameters and whole body proximate composition in Caspian salmon (Salmo trutta caspius). 240 samples of the Caspian salmon with an average weight of 13.73 ± 0.63 g were kept in 300 liter polyethylene tanks. Samples were fed twice a day with Rainbow trout commercial feed to the point of satiation. This experiment lasted for 10 weeks with control (without starvation) and 3 starvation treatments including 2, 4 and 6 weeks of starvation followed by 4 weeks of refeeding with 3 replicates. During rearing period, the average of water temperature, pH and dissolved oxygen were 14.15±0.27 ° C, 8.44±0.17 and 6.34±0.24 mgl-1 , respectively. At the end of starvation period, the results of blood parameters showed that starvation significantly increased red blood cells and hematocrit in treatment with 2 weeks of starvation (0.893±0.58 × 106 /mm3 ) and 6 weeks of starvation (42.33±3.21 %, P〈0.05), respectively. At the end of trial, the highest value of white blood cells belonged to 6 weeks starvation treatment (14.2±0.12 × 103 /mm3 ) while the lowest (10±0.60 × 103 /mm3 ) was observed in the control. Results of the biochemical serum parameters indicated the lowest amount of total protein (1.71±0.88 mg/dl) and glucose (41.35±1.44 mg/dl) were obtained in 6 weeks starvation treatment, right after the starvation period (P〈0.05). At the end of the starvation period, the whole body protein content of control was lower than other treatmens (P〈0.05), but after 2 weeks of refeeding, whole body protein content of 2 and 4 weeks starvation treatments didn't show any significant difference compared to control (P〉0.05). At the end of the experiment, the lowest value of lipid belonged to starvation treatments while the highest value was observed in control (P〈0.05). Generally, this can be inferred that Caspian salmon fish can tolerate starvation for 2 weeks without any negative impact on blood and serum biochemical parameters and for 4 weeks on whole body proximate composition
    Description: Published
    Keywords: Refeeding ; Caspian salmon ; Salmo trutta caspius ; Fingerligs ; Proximate composition ; Starvation ; Hematological ; Serum ; Parameters ; Body ; Composition ; Blood
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.161-174
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  • 7
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    The effect of probiotic Pediococcus acidilactici on growth performance, blood and some serum parameters in Caspian salmon (Salmo trutta caspius) (2017)
    Details
    Publication Date: 2021-05-19
    Description: The effect of probiotic Pediococcus acidilactici on growth performance, blood and some serum parameters on Caspian salmon (Salmo trutta caspius) was studied. An experiment was designed with five treatments each with three replicates. Two hundred and seventy Caspian salmons average (±SD) initial weight of 6.9 ± 0.1 g were assigned to fifteen experimental tanks. The experimental period was eight weeks. At the end of this period, the growth parameters were measured. In addition, after 8 weeks feeding on experimental diets, hematological parameters and metabolic products (cholesterol, glucose and total protein) were measured. Results showed that feed conversion in five treatments (0.4 g probiotic) significantly was lower than control group. Specific growth rate, final weight and weight gain in treatments (0.2 g) compared with the control group significantly increased. Use of probiotics in the diet, showed no significant differences in hemoglobin, hematocrit and mean cell hemoglobin concentration (MCHC). The mean cellular hemoglobin concentration (MCH) and mean corpuscular volume (MCV) were significantly increased in five treatments (0.4 g) compared with the control group, but significantly decreased red blood cell counts (RBC) in five treatments. White blood cells also increased the amount of probiotics 0.2 g. The results of this study indicated that 0.2 g/kg Pediococcus acidilactici probiotics in the diet could be a useful food supplement and should be used to improve the growth parameters in Caspian salmon.
    Description: Published
    Keywords: Pediococcus acidilactici ; Probiotic ; Salmo trutta caspius ; Caspian Salmon ; Growth ; Performance ; Blood ; Serum ; Parameters ; Fish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.35-45
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