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  • Feeding  (7)
  • 1
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    Investigation on the feasibility of Cultivation of Fingerling of the Roach(Rutilus rutilus caspicus ) until marketable size in the earthern pond with brakish and fresh waters (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: In this study monoculture of roach (Rurilus rutilus caspicus) in freshwater and brackish water with 3 stocking densities as 10000, 15000, and 20000 specimens per hectare with 3 replications each carried out from the beginning of May till October 2001. Moreover, in order to, compare cultivation of roach in freshwater with brackish water another density of 10000 specimens per hectare with 3 replication also took place. Fingerlings from the Sijoval cultivation Center were stocked in a pond for wintering and after preparation of rearing ponds in second year were introduced to the pond according to appropriate and calculated stocking density. Fingerlings were fed by concentrated food which is given to white fish for feeding (SFK) up to 30 g in weight of fingerlings. Feeding calculation based on percentage of body weight varied from 5 to 15 % of body weight. Moreover, appetite of fish also considered for feeding the fingerlings. Average weight and length in the first year from hatching time up to the end of rearing period were 5.55±1.58 g and 8.57±1.02 cm. Results indicate that in the second year and in the different stocking density the average weight and length at the end of cultivation period with minimum treatment were 56.68±16.5 g and 16.79±1.21 cm respectively. In maximum stocking density the mean average length was 16.74±1.23 cm and mean average weight was 55.33±16.5. In order to compare cultivation of roach in freshwater with brackish water another stocking density of 10000 specimens per hectare with 3 replications also took place in this study. Fingerlings with average weight of 6.5±1.82 g and average length of 9.5±1.24 cm were introduced to the ponds. At the end of rearing period average final weight was 48.53±9.41 g with average length of 15.15±1.08 cm. Average daily growth in freshwater treatment from the minimum to the maximum stocking density was 0.22, 0.26, and 0.23 respectively. In brackish water replication the average daily growth was 0.22. FCR in the freshwater treatment from the minimum to the maximum stocking density was 4.4, 4.46, and 4.4 respectively and in brackish water it was 3.14. Average condition factor in freshwater was from 2.41 in the second treatment to 2.69 in the first treatment and 2.56 in the third treatment. The average value CF in brackish water was 1.39. Survival rate in the freshwater treatment from the minimum to the maximum stocking density was 85.41, 82.21, and 82.76 % respectively and in brackish water it was 88.73.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Roach ; Rurilus rutilus caspicus ; Cultivation ; Brackishwater ; Freshwater ; Earthen ponds ; Fingerlings ; Specimens ; Density ; Feeding ; Survival rate ; Investigation ; Feasibility
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 51pp.
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  • 2
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    The Study of biology (age, feeding and, reproduction of (Rutilus rutilus caspicus) in south coast of the Caspian Sea (Iranian waters) (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: The Caspian Sea is an important source of water in terms of having valuable resources of sturgeon and bony fish is taken into consideration roach(Rutilus rutilus caspicus (L.)) is one of the most important commercial species in the southern coast of the Caspian Sea in Iran , the catch of this species has declined substantially in the last 10 years, The management and exploitation need of comprehensive review of its biology .This study as part of a comprehensive study of feeding , spawning and growth of this species.In this study, using samples caught in beach seine along the southern coast of the Caspian Sea coastal ( Iranian waters ) took place. The fork length and total weight ranged between 12.5 to29.5(cm) and 29 to293( grm),10.5 to23(cm) and17.2 to21(grm) in Golestan and Gilan Province respectively. The b value of the length-weight relationship ranged 3.02 to 3.25 and 3.28 to 3.75 for female and male, in Golestan and Gilan Province respectively. The age composition of the catch was from 1 to 4 year in both Province, there was one spawning peak and Fecundity variations were high and ranged 7260 to 231965 eggs. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 30.94(1-exp (0.42(t-0.18) and L (t) = 20.49(1-exp (0.53(t-1). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula. Result showed that gastropod, Polychaete worms and molluscs were dominated and specific food items respectively. Shrimp, fish, insects, zooplankton and clams were scare of prey.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rutilus rutilus caspicus ; Spawning ; Feeding ; Growth ; Length
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 48pp.
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  • 3
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    The Study of biology (age, feeding and, reproduction of Rutilus rutilus caspicus in south coast of the Caspian Sea (Iranian waters) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25569 | 18721 | 2018-10-06 17:07:25 | 25569 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The Caspian Sea is an important source of water in terms of having valuable resources of sturgeon and bony fish is taken into consideration roach(Rutilus rutilus caspicus (L.)) is one of the most important commercial species in the southern coast of the Caspian Sea in Iran , the catch of this species has declined substantially in the last 10 years, The management and exploitation need of comprehensive review of its biology .This study as part of a comprehensive study of feeding , spawning and growth of this species.In this study, using samples caught in beach seine along the southern coast of the Caspian Sea coastal ( Iranian waters ) took place. The fork length and total weight ranged between 12.5 to29.5(cm) and 29 to293( grm),10.5 to23(cm) and17.2 to21(grm) in Golestan and Gilan Province respectively. The b value of the length-weight relationship ranged 3.02 to 3.25 and 3.28 to 3.75 for female and male, in Golestan and Gilan Province respectively. The age composition of the catch was from 1 to 4 year in both Province, there was one spawning peak and Fecundity variations were high and ranged 7260 to 231965 eggs. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 30.94(1-exp (0.42(t-0.18) and L (t) = 20.49(1-exp (0.53(t-1). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula. Result showed that gastropod, Polychaete worms and molluscs were dominated and specific food items respectively. Shrimp, fish, insects, zooplankton and clams were scare of prey.
    Keywords: Biology ; Iran ; Caspian Sea ; Rutilus rutilus caspicus ; Spawning ; Feeding ; Growth ; Length
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 48
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  • 4
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    Manufacture of artificial diet to feeding of western white shrimp (Litopenaeus vannamei) in larval stages and in comparison with import diet (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25252 | 18721 | 2018-09-07 06:41:06 | 25252 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: For the accomplish of project, nine treatments with three replicate in each treatment, used as follows. Control treatment: Feeding with natural foods (Chaetoceros sp and artemia nauplii) Treatment 1: Feeding with combination of inner artificial diet and natural foods. Treatment 2: Feeding with combination of imported artificial diet and natural foods. Treatment 3: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with inner artificial diet. Treatment 4: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with imported artificial diet. Treatment 5: feeding from zoea 1 to pl15 with project artificial diet. Treatment 6: feeding from zoea 1 to pl15 with imported artificial diet. Treatment 7: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ imported artificial diet. Treatment 8: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ project artificial diet. Larvae stocked at a density of 100 nauplii/ L-1 (1000 nauplii in each tank each tank), at the beginning of culture period The results showed that, in treatments 1, 2, 7 and 8 from zoea 1 to pl15, growth indexes were suitable and noticible, and in most treatment better than control treatment. Survival percent, in pl15 in treatment 1, 2, 7 and 8 was more than control treatment, and differention between treatment 1, 2 and 8 in comparision with control treatment was statictically significant (p〈0.05). Survival percent in treatments 5 and 6 from stages zoea 1 to late zoea 3 stage, in comparision with other treatments were lesser, but without statictically significant (p〉0.05). But thereafter, significantly decresed. In treatments 3 and 4 from zoea 1 to late mysis 3 stage, survival percent in comparision with other treatments were suitable, and thereafter, significantly decreased, and with statictically significant with other treatments (p〈0.05). The means of final weight in treatments 1, 3 and 8 was more than control treatment, but without statictically significant (p〉0.05), but in treatment 8, was more than other treatments. The mean of final length between treatments 1, 2, 6, 7, 8 and in comparision with control treatment, were not statistically significant (p〉0.05). But in treatment 2, more than control treatment, and in other treatments less than control treatment.
    Keywords: Aquaculture ; Iran ; Larvae culture ; Litopenaeus vannamei ; Imported artificial diet ; Inner microbound artificialdiet ; Feeding ; White shrimp ; Larval stage ; Chaetoceros Sp. ; Artemia nauplii ; Zoea ; Mysis ; Diet
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 40
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  • 5
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    Effect of temperature on taste preference in juveniles of Persian sturgeon (Acipenser persicus) using free amino acid (2021)
    In:  http://aquaticcommons.org/id/eprint/25012 | 18721 | 2018-11-17 18:24:01 | 25012 | Khorramshahr University of Marine Science and Technology
    Details
    Publication Date: 2021-07-16
    Description: The fish gustatory system provides the final sensory evaluation in the feeding process. Free amino acids have a stimulating effect in the fish gustatory system. In this study, behavioral responses to taste in juveniles of Persian sturgeon (Acipenser persicus) to the granules contain a base concentration (0.1 mol) of the free amino acids, Aspartic acid, Histidine and Cysteine to study the effects of increasing temperature (28 °C, water of reproduction center, 30 and 32 ° C ) in treatments 24, 48 and 96 hours were investigated. The results have shown results have shown that the taste response of juveniles of sturgeon to the granules contain different substances are very little different at three temperatures. All tested amino acids increased the average number of catching (extra oral preferences) as compared to control, but despite this increase, the amino acid aspartic acid treatment was significant compared with other treatments. The mean proportion consumption of pellets of % catching number (intra oral preferences), the highest proportion of aspartic acid treatment at 24 and 96 hours, a significant difference was observed (p˂0.05). The results this research showed that the taste preference to environmental factors such as small changes in water temperature resistant.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Chemoreception ; Feeding ; Behavior ; Environmental factors ; Temperature ; Juveniles ; Persian sturgeon ; Acipenser persicus ; Amino acid ; Fish
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 54-63
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  • 6
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    Investigation on the feasibility of cultivation of fingerling of the roach (Rutilus rutilus caspicus) until marketable size in the earthern pond with brackish and fresh waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25388 | 18721 | 2018-09-14 07:53:06 | 25388 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study monoculture of roach (Rurilus rutilus caspicus) in freshwater and brackish water with 3 stocking densities as 10000, 15000, and 20000 specimens per hectare with 3 replications each carried out from the beginning of May till October 2001. Moreover, in order to, compare cultivation of roach in freshwater with brackish water another density of 10000 specimens per hectare with 3 replication also took place. Fingerlings from the Sijoval cultivation Center were stocked in a pond for wintering and after preparation of rearing ponds in second year were introduced to the pond according to appropriate and calculated stocking density. Fingerlings were fed by concentrated food which is given to white fish for feeding (SFK) up to 30 g in weight of fingerlings. Feeding calculation based on percentage of body weight varied from 5 to 15 % of body weight. Moreover, appetite of fish also considered for feeding the fingerlings. Average weight and length in the first year from hatching time up to the end of rearing period were 5.55±1.58 g and 8.57±1.02 cm. Results indicate that in the second year and in the different stocking density the average weight and length at the end of cultivation period with minimum treatment were 56.68±16.5 g and 16.79±1.21 cm respectively. In maximum stocking density the mean average length was 16.74±1.23 cm and mean average weight was 55.33±16.5. In order to compare cultivation of roach in freshwater with brackish water another stocking density of 10000 specimens per hectare with 3 replications also took place in this study. Fingerlings with average weight of 6.5±1.82 g and average length of 9.5±1.24 cm were introduced to the ponds. At the end of rearing period average final weight was 48.53±9.41 g with average length of 15.15±1.08 cm. Average daily growth in freshwater treatment from the minimum to the maximum stocking density was 0.22, 0.26, and 0.23 respectively. In brackish water replication the average daily growth was 0.22. FCR in the freshwater treatment from the minimum to the maximum stocking density was 4.4, 4.46, and 4.4 respectively and in brackish water it was 3.14. Average condition factor in freshwater was from 2.41 in the second treatment to 2.69 in the first treatment and 2.56 in the third treatment. The average value CF in brackish water was 1.39. Survival rate in the freshwater treatment from the minimum to the maximum stocking density was 85.41, 82.21, and 82.76 % respectively and in brackish water it was 88.73.
    Keywords: Aquaculture ; Iran ; Roach ; Rurilus rutilus caspicus ; Cultivation ; Brackishwater ; Freshwater ; Earthen ponds ; Fingerlings ; Specimens ; Density ; Feeding ; Survival rate ; Investigation ; Feasibility
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 51
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  • 7
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    Manufacture of artificial diet to feeding of western white shrimp (Litopenaeus vannamei) in larval stages and in comparison with import diet (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: For the accomplish of project, nine treatments with three replicate in each treatment, used as follows. Control treatment: Feeding with natural foods (Chaetoceros sp and artemia nauplii) Treatment 1: Feeding with combination of inner artificial diet and natural foods. Treatment 2: Feeding with combination of imported artificial diet and natural foods. Treatment 3: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with inner artificial diet. Treatment 4: feeding from zoea 1 to mysis 1 with chaetoceros sp and from mysis 1 to pl15 with imported artificial diet. Treatment 5: feeding from zoea 1 to pl15 with project artificial diet. Treatment 6: feeding from zoea 1 to pl15 with imported artificial diet. Treatment 7: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ imported artificial diet. Treatment 8: Feeding in zoeal stages with chaetoceros sp and from mysis 1 to pl15 with chaetoceros sp+artemia nauplii+ project artificial diet. Larvae stocked at a density of 100 nauplii/ L-1 (1000 nauplii in each tank each tank), at the beginning of culture period The results showed that, in treatments 1 , 2, 7 and 8 from zoea 1 to pl15, growth indexes were suitable and noticible, and in most treatment better than control treatment. Survival percent, in pl15 in treatment 1, 2, 7 and 8 was more than control treatment, and differention between treatment 1, 2 and 8 in comparision with control treatment was statictically significant (p〈0.05). Survival percent in treatments 5 and 6 from stages zoea 1 to late zoea 3 stage, in comparision with other treatments were lesser, but without statictically significant (p〉0.05). But thereafter, significantly decresed. In treatments 3 and 4 from zoea 1 to late mysis 3 stage, survival percent in comparision with other treatments were suitable, and thereafter, significantly decreased, and with statictically significant with other treatments (p〈0.05). The means of final weight in treatments 1, 3 and 8 was more than control treatment, but without statictically significant (p〉0.05), but in treatment 8, was more than other treatments. The mean of final length between treatments 1, 2, 6, 7, 8 and in comparision with control treatment, were not statistically significant (p〉0.05). But in treatment 2, more than control treatment, and in other treatments less than control treatment.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Larvae culture ; Litopenaeus vannamei ; Imported artificial diet ; Inner microbound artificialdiet ; Feeding ; White shrimp ; Larval stage ; Chaetoceros Sp. ; Artemia nauplii ; Zoea ; Mysis ; Diet
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 40pp.
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