摘要
碧流河水库位于辽宁省大连市境内,面积约五万三千亩。1982年8月大坝合拢后,洄游型香鱼滞留在水库中,形成了定居的种群。其生活习性有类似海河洄游的特点。食性转化期为5～6月,又是溯河期,体长为51～98毫米。在水库生活阶段几乎全部摄食浮游动物,溯河后转变为底生藻类食性。7～8月生长迅速,平均体长达110.75和130.42毫米,体重达19.89和35.65克。产卵期在9～10月,9月中、下旬为产卵盛期;成熟系数最高值出现在9月中旬,达13.8％。
Biliuhe reservoir is located in Dalian city, Liaoning province with an area about 53,000 mu. Since the closure of the dam in August 1982, migratory Ayu was detained in the reservoir and formed a settlement population. Its living habit is similar to the characteristics of sea-river migration. Feeding habit changes from May to June at the body length of 51 to 98 mm and meanwhile it is the upstream period. The Ayu almost totally feed .on zooplanktons when they live in the reservoir and change to feed on benthic and epiphytic algae after they migrated to riveres. In July and August the Ayu growing fast, the average body length can reach 110.75mm and 130.42mm; the average body weight can reach l9.89g and 35.65g. the breeding season is from September to October and the flourishing period of breeding is in the middel and late of The maximum maturity coefficient occures in the middle of Sept. and can reach 13.8%.
出处
《大连水产学院学报》
CSCD
1989年第3期31-39,共9页
Journal of Dalian Fisheries University
关键词
陆封型香鱼
食性
繁殖
水库
香鱼
detained Ayu, feeding habit, breeding, growth.
