Growth modelling of Salvelinus fominalis and S. leucomaenis juveniles and their hybrid offspring
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College of Life Science and Technology, Harbin Normal University, Harbin 150025, China;National Local Joint Engineering Laboratory of Freshwater Fish Breeding; Heilongjiang River Fishery Research Institute, Chinese Academy of Fishery Sciences, Harbin 15

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S917

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    Abstract:

    S.leucomaenis and their hybrid offspring from the fertilized egg stage to one year and two months of age (November 2011 to January 2013). Next, we established diallel crosses. The specimens were collected from the water at Bohai station (Bohai Sea). Growth function models(Specialized Logistic, Gompertz, and Von Bertalanffy) were used for fitting the length and weight growth profiles of juveniles and their hybrid offspring for analysis and comparison of their growth characteristics. The test comprised four groups, AA and BB (selfing groups), AB(A♀×B♂) and BA(B♀×A♂) (hybridization groups). A denotes . According to the degree of fit during model fitting of the commercial fish, we judged the value of each combination of by comparing their body weights, body lengths, survival rates and relative fatness levels. The sum of residual squares for the models was compared with one another and the Gompertz growth function was the most accurate model for growth fitting with >0.99, and an AB group advantage was obvious. At the end of the experiment, the survival rates were >0.05) in the other three AA groups. Comparisons of growth rate (g/d), condition factor (g/cm3), and other growth indicators showed the following trend: AB>AA>BA>BB, and the difference was significant (<0.05), with Differences in the growth indices showed the same trend. The direct hybrid ) growth performance was significantly higher than that of the reciprocal hybrid (B) and its parents. Hence, the potential for high economic production in hybrids exists.

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郭媛,户国,谷伟,白庆利,赵文阁,王炳谦. 美洲红点鲑和白斑红点鲑及其杂交子代幼鱼的生长曲线拟合[J]. Jounal of Fishery Sciences of China, 2015,[volume_no](1):51-59

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  • Online: June 23,2015
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