摘要
通过对鸭绿江花羔红点鲑(Salvelinus malma)的绝对繁殖力和胚胎发育时间研究表明:花羔红点鲑的绝对繁殖力为280~500粒,绝对繁殖力与体长、体重呈线性相关,即F=107.1766 L^0.4447(π=41,r=0.8482)和F=360.0+0.2475 W(n=41,r=0.7576).花羔红点鲑的受精卵从受精至仔鱼上浮需110~120d,积温需650.0℃~750.0℃.花羔红点鲑具有较小的绝对繁殖力和较长的胚胎发育时间,是其物种自身遗传性决定和长期适应环境的结果.
Embryonic development time and absolute fecundity of dolly varden charr ( S. malma ) were studied in Yalu river. The results showed that absolute fecundity was 280 - 500 eggs, the relation with absolute fecundity and body length, body weight presented line, namely F = 107.1766L0.4447(n=41, r = 0.8482) and F = 360.0 + 0.2475W(n =41, r = 0.7576) . Insemination eggs of dolly varden charr need development for 110-120 days from insemination to floating and take accumulate temperture for 650.0℃ - 750.0℃ . Absolute fecundity of dolly varden charr was smaller and embryonic development time was longer than that of other fishes. It was due to heredity of species oneself and results of adaptation circumstances.
出处
《吉林农业大学学报》
CAS
CSCD
北大核心
1999年第S1期68-69,共2页
Journal of Jilin Agricultural University
关键词
花羔红点鲑
绝对繁殖力
胚胎发育时间
鸭绿江
dolly varden charr
absolute fecundity
embryonic development time
Yalu river