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  • Growth  (7)
  • 1
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    Heritability estimation for growth-related traits in juvenile wild common carp (Cyprinus carpio L.) in the south of Caspian Sea (2018)
    Details
    Publication Date: 2021-05-19
    Description: Wild common carp of the Caspian Sea is one of the important fish in the north of Iran, which has been introduced to inland aquaculture. Its genetic characteristics are investigated to set up for breeding programs that are still unknown. Using wild common carp in aquaculture is limited for uncontrolled variation in performance of fish derived from undomesticated breeders. A 7×7 factorial mating design was employed to examine genetic effects of dam and sire on growth and heritability of growth-related traits based on dam half-sib and sire half-sib families. Breeders were obtained originally from the Caspian Sea. A total of 1470 offspring were raised in 49 separate fiberglass tanks with common conditions. Body weight and length were recorded at three different ages of rearing. Estimation of heritability of weights ranged from 0.23±0.05 to 0.30±0.07 for dams and ranged from 0.15±0.03 to 0.26±0.04 for sire. Similar results were obtained with length but with less variation (0.24±0.02 to 0.26±0.01 for dams and 0.20±0.02 to 0.22±0.03 for sire). The broad-sense of weight and length are 0.23±0.04 and 0.23±0.01 respectively. The dam and sire effect on growth were significant, indicating the presence of variations among the native fish of the Caspian Sea. Therefore, it is suggested to use a length for selection that is more reliable and less affected by environment than weight at any time of growth and in respect of high phenotypic correlation (0.87-0.95) observed between weight and length. In the present study we even used wild common carp and the heritability was not higher than the domesticated common carp. It means the genetic variation for quantitative traits, for common carp of the Caspian Sea are low or it may be under pressure of inbreeding which should be studied further.
    Description: Published
    Keywords: Cyprinus carpio L. ; Common carp ; Heritability ; Genetic Parameter ; Juvenile ; Growth
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.740-748
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  • 2
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    Genetic parameters estimation of growth in Salmo trutta caspius as a function of body weight and Length (2018)
    Details
    Publication Date: 2021-05-19
    Description: There is no available adequate information on the biology and genetics of the Caspian salmon (salmo truta Caspiu) living in the Caspian Sea with other species such as common carp families, sturgeons and etc., therefore we are interested in knowing whether selection for rapid growth rate in salmo trutta Caspius will potentially lead to correlated genetic response in body weight and length. The potential for correlated responses was evaluated by the heritability estimation, estimating heritabilities of body weight and length. The genetic parameter estimations were obtained for different stages of growth from 5400 fish consisting 27 unrelated families that reached maturity at 36 months of age. The parent which used to produce separate family groups had been caught from the Caspian Sea and spawned during the autumn season. The estimated heritability of body weight and length was 0.42±0.13 and 0.49±0.01, respectively based on differential and selection response between parent pairs and their offsprings. Several factors may have affected the creation of this high level of estimation, dominant effect, inherited from different breeders to offspring.
    Description: Published
    Keywords: Salmo trutta caspius ; Genetic parameters ; Heritability ; Growth ; Body weight ; Length
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.214-222
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  • 3
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    A study on growth parameters, blood factors and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in underground brackish and freshwater (2018)
    Details
    Publication Date: 2021-05-19
    Description: In this research, growth rate, blood parameters and proximate composition of rainbow trout (Oncorhynchus mykiss) cultured in brackish and freshwater were evaluated. Two treatments (brackish and freshwater) in 3 replications were investigated. Six 1.5 m³ fiberglass tanks were used for this experiment, containing 180 rainbow trout specimens with average weight of 47.2±0.1g. Feeding rate in treatments was about 3% of body weight based on water temperature and fish biomass. Total length and weight of fish were measured in 15 days intervals. After 135 days of culture period, some fish samples were transferred to the Lab. Blood were directly collected from the heart. Muscle composition was analyzed for proximate composition. The results showed that the body weight of samples in brackish water was increased significantly after 45 days of culture period. Blood factors including WBC, RBC, Hb, Hct, MCV, MCH, MCHC, lymphocyte, thrombocyte and concentration of K+ ions in fish cultured in brackish water showed a significant increase (P〈0.05). Muscle composition analysis showed a significant increasing (p〈0.05) in fat and dry matter in freshwater treatment, while moisture was significantly higher in brackish water (P〈0.01)
    Description: Published
    Keywords: Biology ; Physiology ; Oncorhynchus mykiss ; Brackish ; Rainbow trout ; Brackish water ; Freshwater ; Blood factors ; Proximate composition ; Growth ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.836-842
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  • 4
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    The preservation of eggs and study growth stages of Sepia pharaonis for sea ranching (2018)
    Details
    Publication Date: 2021-05-19
    Description: Growth of Sepia pharaonis was studied in modified cultural system, 3700 eggs were collected from Hormozgan province shores and studied by means of length frequencies and embryonic growth. The minimum and maximum size of eggs were 7 and 19mm, respectively. 35 to 420 eggs were counted in each collected grapes. Eggs with large yolk vesicle were hatched within 24-27 days, Eggs with small embryos were hatched in 15-17 days and the eggs with large embryos ware hatched in 9-12 days. The length and weight of alter 70 days were 42.0±2.0 (mm) and 9.7±1.2 (g), respectively. Culturing and releasing of Sepia pharaonis youngs after 21 days of rearing were recommended.
    Description: Published
    Keywords: Eggs ; Growth ; Sepia pharaonis ; embryonic yolk vesicle ; Embryonic yolk vesicle ; Length ; Weight ; Culturing ; Cuttlefish
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.127-136
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  • 5
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    Adaptation, growth and survival of tilapia (Oreochromis niloticus) in Bafgh brackish water (2017)
    Details
    Publication Date: 2021-05-19
    Description: An experiment was conducted to evaluate the possibility of adaptation, growth and survival of Nile tilapia (Oreochromis niloticus) with 0.3g initial weight and red tilapia (Oreochromis sp.) with 0.7g initial weight in underground brackish water. Fry of Nile tilapia and red tilapia imported from Indonesia and after passing larviculture (25g) were examined separately in fiber glass tank by two replicate. Fish were fed at a restricted feeding program according to standard table during the light period. The results showed that some growth factors such as final weight, final length, daily growth rate, specific growth rate and weight gain in Nile tilapia were slightly higher than red tilapia but other factors such as survival and feed conversion rate in red tilapia were slightly higher than Nile tilapia. There were no significantly differences at 99% level among these factors. Length-weight relationship equation was w = 0.012×TL3.189 in Nile tilapia and w = 0.014×TL3.119 in red tilapia (r2 = 0.99), b value were 3.189 and 3.119 respectively in Nile and red tilapia representing isometric growth. According to the reliable growth and high survival rate (98%), it seems that both Nile and red tilapia could be good candidates for rearing in brackish water condition.
    Description: Published
    Keywords: Tilapia ; Oreochromis niloticus ; Adaptation ; Growth ; Survival ; Aquaculture ; Feeding
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.23-30
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  • 6
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    The preservation of eggs and study growth stages of Sepia pharaonis for sea ranching (2021)
    In:  http://aquaticcommons.org/id/eprint/24118 | 18721 | 2018-08-03 07:15:04 | 24118 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-15
    Description: Growth of Sepia pharaonis was studied in modified cultural system, 3700 eggs were collected from Hormozgan province shores and studied by means of length frequencies and embryonic growth. The minimum and maximum size of eggs were 7 and 19mm, respectively. 35 to 420 eggs were counted in each collected grapes. Eggs with large yolk vesicle were hatched within 24-27 days, Eggs with small embryos were hatched in 15-17 days and the eggs with large embryos ware hatched in 9-12 days. The length and weight of alter 70 days were 42.0±2.0 (mm) and 9.7±1.2 (g), respectively. Culturing and releasing of Sepia pharaonis youngs after 21 days of rearing were recommended.
    Keywords: Biology ; Cuttlefish ; Sepia pharaonis ; Growth ; Hormozgan province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 127-136
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  • 7
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    The effect of dietary lipid level on the growth of kutum fry (Rutilus frisii kutum) (2018)
    Details
    Publication Date: 2021-05-19
    Description: The study was conducted with a completely randomized design consisting of four treatments in triplicates. Experimental diets were formulated to contain four different lipid levels (8, 10, 12 and 14%) at constant protein level (46.8%) and different gross energy of 4314, 4417, 4519 and 4622kcal/kg, respectively. Kutum fry (average weight, 203±4mg) were randomly assigned and distributed at a density of 2 fish/l into twelve 80 liter fiberglass tanks equipped with a tap-freshwater system and water temperature of 22-24oC. Fish were fed the experimental diets thrice a day at 10% of body weight for 81 days. Statistical analysis indicated that fish fed the lowest lipid level of 8% showed significant differences (p〈0.05) with other treatments. Fish growth, survival, protein and energy retention showed a marked decrease with an increase of dietary lipid level. Crude lipid of carcass composition increased, but ash and moisture decreased with an increase of lipid levels.
    Description: Published
    Keywords: Rutilus frisii kutum ; Dietary lipid ; Nutritional performance ; Feed conversion ratio ; Growth
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.13-24
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