野生细鳞鱼的生物学特性及繁殖力

The detection of the biological characters and productivity of Brachymystax lenok

本文对采捕的野生细鳞鱼的生物学特性及繁殖力进行了测定,结果表明:细鳞鱼可量比例性状为:全长/体长1.13±0.02,体长/体高4.86±0.30,体长/头长4.41±0.19,体长/尾柄长6.94±0.72,体长/尾柄高12.53±0.59,尾柄长/尾柄高1.82±0.17,头长/吻长3.36±0.31,头长/眼径5.41±0.52,头长/眼间距2.89±0.26;可数性状为:背鳍鳍式:II,11～13,胸鳍鳍式:I,15～19,腹鳍鳍式:I,9～12,臀鳍鳍式:II,10～14,侧线鳞:108～163,侧线上鳞:24～37,侧线下鳞:23～36,第一鳃弓鳃耙数:15～29,脊椎骨:57～61,肋骨:28～31,幽门垂:70～121。绝对繁殖力2823.25±1237.01,相对繁殖力3.20±1.79。

This article is about the detection of the biological characters and productivity of Brachymystax lenok. The results showed that the measurable characters ratios of Brachymystax/enok are as follows： total length/body length is 1.13±0.02,body length/body height is 4.86 ±0.30,body length/head length is 4.41±0.19 ,body length/tail stem length is 6.94 ± 0.72 ,body length/tail stem height is 12.53±0.59 ,tail stem length/tail stem height is 1.82 ±0.17, head length/kiss length 3.36 ± 0.31, head length/eye diameter is 5.41 ± 0.52,, head length/eye distance is 2.89 ± 0.26. And the countable characters are which the dorsal fin formula is 1I ：11 - 13,the pectoral fin formula is Ⅰ, 15 -19,the ventral fin formula is Ⅰ ,9 ～ 12 ,the anal fin formula is -Ⅱ ：10 ～14 ,the scale in lateral line is 108 -163, the scale above lat- eral line is 24 ～ 37, the scale below lateral line is 23 - 36, the number of first gill arch and raker is 15 ～ 29, the vertebra is 57 - 61, the costa is 28 - 31, the pyloric sac is 70 - 121. The absolute productivity is 2823.25 ± 1237.01 and the relative productivity is 3.20 ± 1.79.