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  • 1
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    An investigation of the effects of differing protein levels on growth indices WG, RGR, FCR, FCE and PER in cultured crayfish (Astacus leptodactylus) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Knowledge of nutritional requirements and especially protein levels is needed to produce strong and larger freshwater crayfish in controlled conditions. This has not been available for the miniature size crayfish culture. Hence, an eight-week experiment was conducted on miniature size crayfish in three treatment groups each with three replicates receiving a diet that contained 25%, 30% and 35% protein levels with isocaloric digestible energy (DE) 3500 kcal/kg. A number of 540 miniature crayfish with a mean weight 100± 12mg were randomly selected and partitioned into nine tanks containing 200 liters of freshwater 70% of which exchanged daily. The fish were fed at 25% of body weight five times daily at 6, 10, 14, 18 and 22 hours using pellets 0.1, 0.2 and 0.4 mm. Nutritional responses in tern of weight gain, PGR, FCR, FCE and PER were compared among the groups using one-way ANOVA. The test showed a significant increase in the indices such as WG and PER in response to increased protein level (P〈0.05). FCR, FCE and PGR show a significant increase using 20% protein level while using 30 and 35% protein levels did not produce significant results (P〈0.05). The test revealed a significant difference between treatments 1 and 3 (P〈0.05) but not between 1 and 2.1 conclude that the treatment 3 produces more reliable results.
    Description: Published
    Keywords: Nutritional ; Protein ; Growth indices ; Crayfish ; Astacus leptodactylus ; Nutritional evaluation ; Culture ; Digestible energy ; ANOVA ; Investigation
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.145-156
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  • 2
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    An investigation of the effects of differing protein levels on growth indices WG, RGR, FCR, FCE and PER in cultured crayfish (Astacus leptodactylus) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Knowledge of nutritional requirements and especially protein levels is needed to produce strong and larger freshwater crayfish in controlled conditions. This has not been available for the miniature size crayfish culture. Hence, an eight-week experiment was conducted on miniature size crayfish in three treatment groups each with three replicates receiving a diet that contained 25%, 30 % and 35143 protein levels with isocaloric digestible energy (DE) 3500 kcal/kg. A number of 540 miniature crayfish with a mean weight 100± I 2mg were randomly selected and partitioned into nine tanks containing 200 liters of freshwater 70% of which exchanged daily. The fish were fed at 25% of body weight five times daily at 6, 10, 14, 18 and 22 hours using pellets 0.1, 0.2 and 0.4 mm. Nutritional responses in term of weigh gain, PGR, FCR, FCE and PER were compared among the groups using one-way ANOVA. The test showed a significant increase in the indices such as WG and PER in response to increased protein level (P〈0.05). FCR, FCE and PGR show a significant increase using 20% protein level while using 30 and 35% protein levels did not produce significant results (P〈0.05). The test revealed a significant difference between treatments 1 and 3 (P〈0.05) but not between 1 and 2. 1 conclude that the treatment 3 produces more reliable results.
    Description: Published
    Keywords: Astacus leptodactylus ; Nutritional evaluation ; Protein ; Growth indices
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.145-156
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  • 3
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    Effects of dietary carbohydrate levels on growth, survival and body composition in Caspian Kutum (Rutilus frisii kutum, Kamenskii, 1901) (2017)
    Details
    Publication Date: 2021-05-19
    Description: This study was carried out to evaluate the effects of dietary carbohydrate levels on growth performance and body composition of juveniles Caspian Kutum (Rutilus frisii kutum). Fish with initial average weight of 0.8±0.2g (±SD) were fed five isoproteic and isenergic formulated diets with different carbohydrate levels including 15, 20, 25, 30 and 35% in triplicate groups, 4 times daily according to their satiation for 10 weeks. Results showed that increasing the level of carbohydrate to 35% significantly increase some growth indices such as final weight (Wf), weight gain (WG), body weight increase (BWI), specific growth rate (SGR) and protein efficiency ratio (PER). In addition, result of body composition analysis showed that the increase in carbohydrate level lead to increase of protein level. So, the highest amount of protein was observed in fingerlings fed with diet containing 35% carbohydrate. In conclusion, the results indicate that increase in carbohydrate levels from 15 to 35% have not any negative effect on growth parameters and therefore, the level of 35% carbohydrate in the diet of 1-2g Caspian Kutum fingerlings can lead to better efficient in protein and desirable growth.
    Description: Published
    Keywords: Handmade food ; Caspian kutum ; Rutilus frisii kutum ; Feeding ; Aquaculture ; Dietary ; Carbohydrate ; Levels ; Growth ; Survival ; Body composition
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.85-94
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  • 4
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    Effects of dietary carbohydrate levels on growth, survival and body composition in Caspian Kutum (Rutilus frisii kutum, Kamenskii, 1901) (2021)
    In:  http://aquaticcommons.org/id/eprint/21925 | 18721 | 2018-01-16 13:38:15 | 21925 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-04
    Description: This study was carried out to evaluate the effects of dietary carbohydrate levels on growth performance and body composition of juveniles Caspian Kutum (Rutilus frisii kutum). Fish with initial average weight of 0.8±0.2g (±SD) were fed five isoproteic and isenergic formulated diets with different carbohydrate levels including 15, 20, 25, 30 and 35% in triplicate groups, 4 times daily according to their satiation for 10 weeks. Results showed that increasing the level of carbohydrate to 35% significantly increase some growth indices such as final weight (Wf), weight gain (WG), body weight increase (BWI), specific growth rate (SGR) and protein efficiency ratio (PER). In addition, result of body composition analysis showed that the increase in carbohydrate level lead to increase of protein level. So, the highest amount of protein was observed in fingerlings fed with diet containing 35% carbohydrate. In conclusion, the results indicate that increase in carbohydrate levels from 15 to 35% have not any negative effect on growth parameters and therefore, the level of 35% carbohydrate in the diet of 1-2g Caspian Kutum fingerlings can lead to better efficient in protein and desirable growth.
    Keywords: Aquaculture ; Biology ; Feeding ; Aquaculture ; handmade food ; Rutilus frisii kutum ; Caspian Kutum ; survival ; growth ; dietary ; diet ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 85-94
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  • 5
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    The effect of sodium bentonite on growth, survival and biochemical composition of juvenile beluga (Huso huso) (2021)
    In:  http://aquaticcommons.org/id/eprint/24904 | 18721 | 2018-11-20 12:31:57 | 24904 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: For improving the hydro-stability of pelleted feed of juvenile Beluga in confined area and its growth performances, a nutritional experiment was conducted for 8 weeks duration, using sodium bentonite as a binder. In this experiment, four treatments with a level of 0, 1, 1.5 and 2 percent with iso-nitrogenus (45±0.61) and iso-lipedic (16±0.77) were formulated and feed to triplicate group of fish. Three-hundred and seventy five juvenile Beluga of size (22±0.7g) were randomly selected and distributed between 12 fiber glass tanks of 500L capacity. The juvenile beluga which was fed with diet containing 1.5% sodium bentonite had the highest RGR, PER and FER and shown significant with other treatments (p〈0.05). The result of this experiment was not shown any significant differences in growth and feed efficiency in treatment (control) and treatment 2%. Body carcass composition, except ash content, did not show noticeable significance differences between treatments (p〉0.05).In general, treatment 1.5% sodium bentonite was shown to be the most reliable one.
    Keywords: Aquaculture ; Biology ; Sodium bentonite ; Juvenile ; Beluga ; Huso huso ; Growth ; Body composition ; Survival ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 100-111
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  • 6
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    Effect of replacing fish meal with canola meal on growth performance, survival and body composition of Siberian sturgeon (Acipenser baerii Brandt) (2021)
    In:  http://aquaticcommons.org/id/eprint/25014 | 18721 | 2018-11-17 18:25:00 | 25014 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: This study was conducted to evaluate the effect of replacing dietary fish rations with canola rations on the growth rate, survival rate and body composition of the Siberian sturgeon (Acipenser baerii Brandt). Five isonitrogenous (45% crude protein) and isocaloric (18.53 MJg^-1) diets were formulated by replacing 0 (control), 10 (C_10), 20 (C_20), 30 (C_30) and 40% (C_40) of fish rations with canola rations. Juvenile fish with an initial weight of 22.80 ± 0.34 g (mean ± SD) with five treatments and three replications were fed for 10 weeks. At the end of the experiment, the growth rate, survival rate and body composition of the fish were measured. The results of this study showed that there was significant differences in the growth indices and body composition of the fish that were fed the different diets (P〈0.05). The lowest growth rate was observed in C_40, with significant differences in the growth rate between C40 and the other treatments (P〈0.05). There were no significant differences in the growth rate between C_30 and C_40 (P〉0.05). The survival rate was 100% in all treatments. There were no significant differences in body protein, lipid and ash contents in the different treatments (P〉0.05), but significant differences were observed in the moisture content of the body of the fish that were fed different diets (P〈0.05). The results of the present study suggest that 30% of fish rations can be replaced by canola rations without any negative effects on the growth rate, survival rate and body composition of the Siberian sturgeon.
    Keywords: Aquaculture ; Iran ; Canola meal ; Siberian sturgeon ; Acipenser baerii ; Growth performance ; Body composition ; Survival ; Fish ; Fed
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 77-88
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