摘要
１９９１年１０月至１９９２年７月，在嘉陵江下游采集粗唇标本２１１尾，进行了生物学性状的测量和统计运算．用胸鳍棘脱钙切片法鉴定年龄．体长与棘切片半径呈直线正相关．渔获物中８０％为２龄和３龄鱼，雌鱼的体重和肥满度均较同体长的雄鱼高．粗唇属一次性产卵的鱼类，产卵期为５～７月，雌鱼性成熟最小型为２龄，体长１０．６ｃｍ，体重２２．２ｇ．绝对繁殖力为１３７２（５８３～２３９２）粒，且与体长、体重、年龄和成熟系数成正相关。受精卵卵径２．０～２．２ｍｍ．强粘性．在２６．５～３０．５℃的水温下，经５０小时４２分孵出．初孵仔全鱼长５．２～５．８ｍｍ．
During Oct.,1991 to July,1992,211 specimens of leiocassis crassilabris were collected from the Jialing River.Their biometric characteristics were discribed. The cross-sections of the decalcified pec- toral spines were used for age determination. The body length and the spine' radius',were shown tobe linear corelated. About 80%of the catches consists of 2 and 3 age groups. The weight. as welllas the condition factor for females were more than that for males of corresponding lengths. The femalewere confirmed to spawn once in spawning season from May to July. Sex ratio was a little in favor offemale. Age-and-size at first maturation of female was 2 years old with a body length of 10.6cm. Ab-solute fecundity of the female was from 583 to 2792(X 1372)eggs,and greatly related to bodylength,bOdy weight,age and G,S.I..The fertillzed eggs,with a diameter of 2.0～2.2 mm,were,very sticky. Under the water temperature of 26.5 ～ 30.5C,50 hr.and 42 min,was cost for fertilizedegg hatching out of the larva. Total length of the newly hatched larvae were 5.2～5.8 mm。
出处
《西南师范大学学报（自然科学版）》
CAS
CSCD
1995年第1期59-65,共7页
Journal of Southwest China Normal University(Natural Science Edition)
关键词
粗唇Wei
可量性状
年龄
生长
繁殖生物学
Leiocassis crassilabris
biometric characteristics
age and growth
reproductive biology
