养殖条件下山女鳟银化体色个体生产性状

以山女鳟(Oncorhynchus masou masou)群体中出现的银化体色个体为研究对象,系统研究了在人工养殖条件下银化体色个体在群体中所占比率、银化体色个体与正常体色个体的体色差异,以及银化体色个体生长性状等.结果表明:①群体中不同家系间银化体色个体所占比率在O～0.21范围内,采用3×2列联表法进行卡方检验,...

Properties of Silvering Salmon in Oncorhynchus masou masou Population under Aquaculture Condition

We studied the properties of silvering salmon in Oncorhynchus masou masou population under aquaculture condition and found ① the proportion of fish with silvering body color among six progeny groups varied between 0 and 0.21.The ratio of fish with normal color and silvering color was significantly different between progeny groups(Pearson χ2df=5=93.362,P <0.01);② by using L*a*b* color space to check the color difference,there was a significant different in body color between salmon with silvering body color and normal body color.The value of L*、a* and C*abbetween fish silvering colored and normal colored was significant difference(P<0.01).The L* value for the former is 30.78-48.50 and 51.24 to 71.43 for the latter;③After 12-month experimental period under the same condition,silvering salmon grew significant slower than normal ones(P<0.01),the average body weight of the former was 113.72 g and the latter was 132.25 g.For the indices of condition factor(CF) and special growth rate(SGR),there also had significant difference between the silvering and normal body color salmon(P<0.01) during the experiment.Salmons with different body color presented different SGR at different growing period,but CF for the normal body color salmon is always higher than the silvering body color ones.This paper provides data for the further utilization on silvering salmon and for body color traits genetic improvement in O.masou.