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  • 1
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    The effect of different diets on production and population specific growth rate of the freshwater Cladoceran Ceriodaphnia quadrangula (Muller, 1785) (2017)
    Details
    Publication Date: 2021-05-19
    Description: In this study, effects of five different diets including green algae, Scenedesmus quadricauda, mixture of S. quadricauda and baker's yeast, cattle manure, poultry manure, mixture manure (cattle + poultry, 1:1 ratio in weight) were examined on density, specific growth rate and doubling time of freshwater Cladoceran, Ceriodaphnia quadrangula population, at two high and low levels of food density with three replications. The results showed that the maximum population density (184 individuals/50ml), maximum specific growth rate (SGR) (0.18/day) and minimum doubling time (Dt) (3.85 days) were obtained when C. quadrangula fed with S. quadricauda at high density (50×104 cell/ml). In addition, the minimum population density (7.3 ind/50 ml), minimum SGR (0.019 /day), and maximum Dt (36.2 days) resulted from C. quadrangula fed on cattle manure at low diet density (5mg). In this research, maximum (800±34.6µm) (Mean ±SE) and minimum (521±31.6µm) body length of C. quadrangula measured when fed with cattle manure at low diet density and S. quadricauda at high diet density, respectively. In conclusion, the results of current study illustrated that S. quadricauda as diet gave better performance for rearing of C. quadrangula compared to other diet treatments.
    Description: Published
    Keywords: Ceriodaphnia quadrangula ; Cladoceran ; Diets ; Production ; Populations ; Growth ; Freshwater ; Feeding ; Zooplankton
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.37-48
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  • 2
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    Study on nursery growth performance of Pacific white shrimp (Litopenaeus vannamei Boone, 1931) under different feeding levels in zero water exchange system (2018)
    Details
    Publication Date: 2021-05-19
    Description: 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 oxygen and pH between different treatments (p〉0.05). There were significant differences in water ammonia level between different treatments (p〈0.05). The maximum (0.39 mg/L) and minimum (0.12 mg/L) levels of ammonia were observed in control and biofloc treatment with minimum feeding level (9%BW/day), respectively. The highest body weight gain (1.55g), growth rate (48.50 mg per day), specific growth rate (9.64%/day), biomass gain (182.1g) and body length increase (33.62mm) were observed in biofloc treatment with maximum feeding level. The highest feed conversion ratio and the lowest feed efficiency were obtained in control (p〈0.05). The proximate body composition analysis revealed an increase in lipid, protein and ash in biofloc treatments. Results showed that using biofloc technology can decrease water exchange amount and improve feed utilization in nursery culture of Pacific white shrimp. Moreover, presence of biofloc improved the water quality which led to the enhancement in growth performance in nursery stage of shrimp.
    Description: Published
    Keywords: Aquaculture ; Litopenaeus vannamei ; Biofloc technology ; Zero-water exchange system ; Water quality ; Growth performance ; Body composition ; Nursery ; Pacific white shrimp ; Feeding ; Levels ; Biomass
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 1465-1484
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  • 3
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    Effects of water hardness and turbidity on growth and fecundity of freshwater Cladoceran, Moina macrocopa (Straus, 1820) (2018)
    Details
    Publication Date: 2021-05-19
    Description: Water hardness and turbidity are important parameters in zooplankton culture, especially for Cladoceran affecting growth and reproductive parameters of the plankton. Effects of water hardness and turbidity on growth and fecundity of the Cladoceran, Moina macrocopa, was investigated by culturing and feeding them on green algae Scenedesmus quadricauda. Experimental treatments for hardness were 0, 20, 40 and 80mg/I as CaCO3 and for turbidity were 0, 20, 40 and 80 NTU (Nephelometric Turbidity Unit). Experiments were carried out in 500m1 flasks with initial density of 15 individuals per flask in randomized complete block design with three replicates. After 10 days, we found that M macrocopa, had the maximum population density (370.5-365.0 individuals per flask), maximum specific growth rate (SGR) (0.35/day), and the shortest population doubling time (Dt) (1.98 days) at 0 and 20mg/1 CaCO3, all with significant differences compared to other treatments (P〈0.05). In contrast, we observed the maximum population density (296-325.5 individuals per flask) at turbidities of 0 and 20 NTU, maximum SGR (0.33/day) and the shortest Dt (2.10 days) at turbidity of 0 NTU, with significant differences compared to other treatments (P〈0.05). The highest fecundity of Al macrocopa was obtained at 213mgil as CaCO3 and turbidity of 0 NTU which significantly differed with other treatments (P〈0.05). Overall, we showed that AI macrocopa in freshwater with hardness less than 20mg11 as CaCO3 and turbidity less than 20 NTU had better growth and fecundity performance. The species can be used to evaluate habitats where water hardness and turbidity is higher. Mass culture of the species based on its growth and reproduction under these optimal conditions could provide suitable zooplanktonic biomass for feeding of fish larvae.
    Description: Published
    Keywords: Moina macrocopa ; Live food ; Specific Growth Rate (SGR) ; Breeding ; Water quality ; Growth ; Freshwater ; Fish ; Larvae
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.97-106
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  • 4
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    Effects of different salinity levels and carbon sources in biofloc production system (2020)
    Details
    Publication Date: 2021-05-19
    Description: Carbonaceous organic matter and water salinity are the key factors in zero water exchange system with biofloc production. In the present study, production of biofloc in different water salinities and carbon sources was investigated in zero water exchange system. For this purpose, three levels of salinity (10, 21 and 32 ppt) and two types of carbon source (molasses and wheat flour) were considered in zero water exchange system. The experiment was conducted in tanks with water volume of 300L for 4 weeks in propagation and cultivation aquatics center located in Bandar Kolahi, Minab, Hormozgan province. Minimum dissolved oxygen (5.68 mg/l) and NH3 (0.29 mg/l) and maximum NO3 (12.68 mg/l) obtained in the tanks with molasses, as carbon source, and 32ppt water salinity. Some of water phsicochemical parameters including dissolved oxygen, pH, NH3 and NO3 were measured regularly and significant differences were observed among the different treatments (p〈0.05). The analysis of the biochemical composition of the bioflocs showed a decrease in protein and an increase in ash content along with increase in water salinity. Lipid content in molass biofloc was significantly lower than the wheat flour biofloc (p〈0.05). The results showed that type of carbon source and value of salinity would be effective on water quality parameters and nutrition value of bioflocs in zero water exchange system.
    Description: Published
    Keywords: Biofloc ; Salinity ; Tank ; Dissolved oxygen ; Biochemical composition
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.69-78
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  • 5
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    Evaluation of egg vitamins A and E content in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) broodstock affected by different levels of synthetic and natural (Heamatococcus pluvialis) astaxanthin (2017)
    Details
    Publication Date: 2021-05-19
    Description: In present research, effect of dietary astaxanthin levels in sources of synthetic and algal on vitamins A and E content of egg rainbow trout broodstock was investigated, totally for 120 days. It was considered seven groups consisting six treatments (T1-T6) in two different astaxanthin sources and control (C). According to experiment design, treatments were arranged as algal astaxanthin (Haematococcus pluvialis) in the three levels of 2.67, 3.55 and 8gr/kg food (T1, T2, T3); and synthetic astaxanthin in three levels of 40, 80 and 120mg/kg food (T4, T5, T6). Egg vitamins A and E content in obtained eggs from all treatments during spawning season was measured. The highest (280.88± 22.51 ng) and the lowest (147.82± 12.71ng) amount of vitamin A were observed in T2 and control group, respectively. The highest (19.71± 2.92µg) and the lowest (5.27± 0.51µg) amount of vitamin E were obtained in T3 and control group, respectively. By increasing level of astaxanthin in both sources of algal and synthetic, content of vitamin E in egg increased but the effect of algal source on these indices was more perfect. In general present study show that, feeding broodstock affected on quality content of egg, It also concluded that natural astaxanthin (Haematococcus pluvialis) for the reason that contains supplementary nutritious, is extraordinary preferable than synthetic astaxanthin to improve vitamins content of egg in rainbow trout.
    Description: Published
    Keywords: Rainbow trout ; Oncorhynchus mykiss ; Heamatococcus pluvialis ; Astaxanthin ; Evaluation ; Eggs ; Vitamins A ; Vitamin E ; Levels ; Synthetic ; Feeding ; Algal ; Spawning
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.27-40
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  • 6
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    Study on nursery growth performance of Pacific white shrimp (Litopenaeus vannamei Boone, 1931) under different feeding levels in zero water exchange system (2021)
    In:  http://aquaticcommons.org/id/eprint/22966 | 18721 | 2018-06-08 20:17:50 | 22966 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-12
    Description: 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 oxygen and pH between different treatments (p〉0.05). There were significant differences in water ammonia level between different treatments (p〈0.05). The maximum (0.39 mg/L) and minimum (0.12 mg/L) levels of ammonia were observed in control and biofloc treatment with minimum feeding level (9%BW/day), respectively. The highest body weight gain (1.55g), growth rate (48.50 mg per day), specific growth rate (9.64%/day), biomass gain (182.1g) and body length increase (33.62mm) were observed in biofloc treatment with maximum feeding level. The highest feed conversion ratio and the lowest feed efficiency were obtained in control (p〈0.05). The proximate body composition analysis revealed an increase in lipid, protein and ash in biofloc treatments. Results showed that using biofloc technology can decrease water exchange amount and improve feed utilization in nursery culture of Pacific white shrimp. Moreover, presence of biofloc improved the water quality which led to the enhancement in growth performance in nursery stage of shrimp.
    Keywords: Aquaculture ; Biology ; Chemistry ; Biofloc technology ; Zero-water exchange system ; Water quality ; Growth performance ; Body composition ; Nursery ; Pacific white shrimp ; aquaculture ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1465-1484
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  • 7
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    Effect of different feeding levels on water quality, growth performance and survival of western white shrimp (Litopenaeus vannamei Boone, 1931) post larvae with application of biofloc technology (2021)
    In:  http://aquaticcommons.org/id/eprint/22049 | 18721 | 2018-01-25 08:43:37 | 22049 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-07
    Description: In this study, effect of different feeding levels on water quality, growth performance and survival of western white shrimp Litopenaeus vannamei post larvae were studied in biofloc rearing system. Shrimp postlarvae of PL10 with mean weight of 3±0.7 mg and mean length of 4.4± 0.93 mm were fed for three weeks in fiberglass containers with 200 liters volume of water and density of 10 post larvae per liter in four tretments including one control with water exchange and three biofloc treatments at different feeding levels of 25, 20 and 15% of body weight. According to the results, in the values of water quality parameters including salinity, dissolved oxygen, pH, nitrite and nitrate, no significant differences were observed among the groups (p〉0.05). The highest increase in body weight (58.42 mg), growth rate (2.78 mg per day), specific growth rate (15.09 %/day), biomass (84020 mg) and survival rate (71.9%) were obtained in biofloc treatment at 25% feeding level. The highest feed conversion ratio (2.05) and the lowest feed efficiency (48.62%) were obtained in water exchange treatment without floc, showing significant difference compared to the other treatments (P〈 0.05). The results from this study reveals that by using biofloc rearing technology can decrease the amount of water exchange and feed utilization compared to body weight in culture of western white shrimp post larvae. Moreover, the presence of biofloc improves growth performance and production of L. vannamei post larvae in biofloc rearing system.
    Keywords: Aquaculture ; Biology ; Ecology ; Biofloc technology ; Water quality ; Growth performance ; Survival ; Litopenaeus vannamei ; feeding ; levels ; white shrimp ; biofloc ; application ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-28
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  • 8
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    Evaluation of egg vitamins A and E content in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) broodstock affected by different levels of synthetic and natural (Heamatococcus pluvialis) astaxanthin (2021)
    In:  http://aquaticcommons.org/id/eprint/22155 | 18721 | 2018-02-15 22:08:55 | 22155 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-06-28
    Description: In present research, effect of dietary astaxanthin levels in sources of synthetic and algal on vitamins A and E content of egg rainbow trout broodstock was investigated, totally for 120 days. It was considered seven groups consisting six treatments (T1-T6) in two different astaxanthin sources and control (C). According to experiment design, treatments were arranged as algal astaxanthin (Haematococcus pluvialis) in the three levels of 2.67, 3.55 and 8gr/kg food (T1, T2, T3); and synthetic astaxanthin in three levels of 40, 80 and 120mg/kg food (T4, T5, T6). Egg vitamins A and E content in obtained eggs from all treatments during spawning season was measured. The highest (280.88± 22.51 ng) and the lowest (147.82± 12.71ng) amount of vitamin A were observed in T2 and control group, respectively. The highest (19.71± 2.92µg) and the lowest (5.27± 0.51µg) amount of vitamin E were obtained in T3 and control group, respectively. By increasing level of astaxanthin in both sources of algal and synthetic, content of vitamin E in egg increased but the effect of algal source on these indices was more perfect. In general present study show that, feeding broodstock affected on quality content of egg, It also concluded that natural astaxanthin (Haematococcus pluvialis) for the reason that contains supplementary nutritious, is extraordinary preferable than synthetic astaxanthin to improve vitamins content of egg in rainbow trout.
    Keywords: Aquaculture ; Biology ; Rainbow trout ; Astaxanthin ; Haematococcus pluvialis ; Vitamin A ; Vitamin E ; Oncorhynchus mykiss ; egg ; Evaluation ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 27-40
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  • 9
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    Effects of water hardness and turbidity on growth and fecundity of freshwater Cladoceran, Moina macrocopa (Straus, 1820) (2021)
    In:  http://aquaticcommons.org/id/eprint/23875 | 18721 | 2018-08-01 06:24:42 | 23875 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Water hardness and turbidity are important parameters in zooplankton culture, especially for Cladoceran affecting growth and reproductive parameters of the plankton. Effects of water hardness and turbidity on growth and fecundity of the Cladoceran, Moina macrocopa, was investigated by culturing and feeding them on green algae Scenedesmus quadricauda. Experimental treatments for hardness were 0, 20, 40 and 80mg/I as CaCO_3 and for turbidity were 0, 20, 40 and 80 NTU (Nephelometric Turbidity Unit). Experiments were carried out in 500m1 flasks with initial density of 15 individuals per flask in randomized complete block design with three replicates. After 10 days, we found that M macrocopa, had the maximum population density (370.5-365.0 individuals per flask), maximum specific growth rate (SGR) (0.35/day), and the shortest population doubling time (Dt) (1.98 days) at 0 and 20mg/1 CaCO_3, all with significant differences compared to other treatments (P〈0.05). In contrast, we observed the maximum population density (296-325.5 individuals per flask) at turbidities of 0 and 20 NTU, maximum SGR (0.33/day) and the shortest Dt (2.10 days) at turbidity of 0 NTU, with significant differences compared to other treatments (P〈0.05). The highest fecundity of Al macrocopa was obtained at 213mgil as CaCO_3 and turbidity of 0 NTU which significantly differed with other treatments (P〈0.05). Overall, we showed that AI macrocopa in freshwater with hardness less than 20mg/l as CaCO3 and turbidity less than 20 NTU had better growth and fecundity performance. The species can be used to evaluate habitats where water hardness and turbidity is higher. Mass culture of the species based on its growth and reproduction under these optimal conditions could provide suitable zooplanktonic biomass for feeding of fish larvae.
    Keywords: Biology ; Moina macrocopa ; Breeding ; Live food ; Specific Growth Rate (SGR) ; Water quality ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 97-106
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  • 10
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    Effect of temperature and photoperiod on the growth and fecundity of a freshwater cladoceran, Moina macrocopa (Straus, 1820)(Branchiopoda: Anomopoda) (2021)
    In:  http://aquaticcommons.org/id/eprint/24886 | 18721 | 2018-11-22 07:10:54 | 24886 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: Temperature and photoperiod are important parameters in zooplankton culture, particularly in cladoceran culture due to their significant effect on growth and reproduction. Effects of temperature and photoperiod on the growth and fecundity of a cladoceran, Moina macrocopa was examined by culturing and feeding it with green algae Scenedesmus quadricauda in 500 ml conical flasks. Treatments used for temperature (°C) and photoperiod were 25, 30, 35 (°C) and 12:12, 24:0 and 0:24(light:dark hours), respectively. The maximum population density (310.5 individuals/flask), maximum specific growth rate (SGR) (0.387 individuals /day), shortest population doubling time (Dt) (1.79days) and highest fecundity (8.5 offsprings/ female) obtained at 30(°C). Correspondingly, the maximum population density (320.7 ind/flask), maximum SGR (0.538 ind/day), shortest Dt (1.28 days) and highest fecundity (7.54 offsprings/ female) determined at 24:0 light:dark photoperiod. Overall, this research showed that growth and reproduction of M. macrocopa at 30 (°C) and 24:0 light:dark photoperiod gave significant performance (P〈0.05) compared to other examined treatments. Mass culture of this species under the mentioned conditions of temperature and photoperiod could provide suitable live food for use in fish larvaiculture.
    Keywords: Aquaculture ; Moina macrocopa ; Temperature ; Photoperiod ; Specific growth rate ; Fecundity ; Zooplankton ; Fresh waters ; Branchiopoda ; Anomopoda ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 48-56
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