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本文报道了长江水系和辽河水系中华绒螯蟹在安徽省女山湖围网区的生长性能的研究结果。 (1)两水系河蟹的生长速率各月略有差异 ,长江蟹 3月 - 7月生长速度稍低于辽河蟹 ,但差异不显著 (P >0 .0 5 ) ;8月- 10月份长江蟹生长快于辽河蟹 ,差异极显著 (P <0 .0 1)。 (2 )辽河蟹青春期蜕壳时间比长江蟹提前 30d ,生殖洄游期也相应提前 30d。 (3)两水系河蟹养成的商品蟹规格、增重倍数和回捕率差异极显著 (P <0 .0 1)。综合分析认为 ,长江蟹在淮河流域湖泊中网围养殖的生长性能指标优于辽河蟹。
This paper reports the results of the study on the growth performance of Chinese mitten crab (Eriocheir sinensis) from the Yangtze River and Liaohe rivers in the fenced area of Nushan Lake in Anhui Province. (1) There was a slight difference in the growth rates of crabs between two water systems in each month. The growth rate of Yangtze crabs in March-July was slightly lower than that of Liaohe crabs, but the difference was not significant (P> 0.05). In August-October, Growth faster than Liao Crab, the difference was significant (P <0. 01). (2) Liaohe crab adolescent shellfish premature feeding time than the Yangtze River 30d, reproductive migratory period also corresponding to 30d. (3) There was a significant difference (P <0. 01) in the product size, weight gain ratio and recovery rate of commercial crabs cultivated in two water crabs. Comprehensive analysis shows that the Yangtze River crab in the Huaihe River lacustrine aquaculture growth performance index is superior to Liao Crab.