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黄颡鱼的两性异形和雌性繁殖特征
引用本文:林植华,雷焕宗.黄颡鱼的两性异形和雌性繁殖特征[J].动物学杂志,2004,39(6):13-17.
作者姓名:林植华  雷焕宗
作者单位:浙江丽水师范专科学校应用生物学系,丽水,323000
基金项目:浙江省教育厅科研项目(No.20040497)
摘    要:测定了黄颡鱼成体的体长、头长、头宽、头高、吻长、眼径、眼间距、眼后头长、体高、尾柄高、背鳍基前距、背鳍基长、尾柄长、腹鳍基前距、背鳍脂鳍间距、腹鳍臀鳍间距、尾鳍长、体重、去内脏体重等形态指标以及雌体的怀卵数量。雌性成体的体长显著小于雄性成体。其它局部特征皆与体长呈正相关,回归剩余值的t—检验表明,雌性成体的眼径、头高、体高、腹鳍基前距、体重显著大于雄性成体,其它局部形态特征不存在显著的两性差异。黄颡鱼雌体通过个体大小的增加和腹部形态的改变增加腹腔容量,增加繁殖输出。

关 键 词:黄颡鱼  两性异形  雌性繁殖
文章编号:0250-3263(2004)06-13-05

Sexual Dimorphism and Female Reproductive Characteristics of Pseudobagrus fulvidraco
LIN Zhi Hua LEI Huan Zong.Sexual Dimorphism and Female Reproductive Characteristics of Pseudobagrus fulvidraco[J].Chinese Journal of Zoology,2004,39(6):13-17.
Authors:LIN Zhi Hua LEI Huan Zong
Abstract:We measured some morphological traits, including the body length, head length, head width, head depth, snout length, eye diameter, interorbital width, postorbital head length, body depth, caudal peduncle depth, dorsal fin precoxal length, dorsal fin coxal length, caudal peduncle length, pelvic fin precoxal length, the space between dorsal fin and adipose fin, the space between pelvic fin and anal fin, caudal fin length, body weight, carcass weight, and individual fecundity in a population of Pseudobagrus fulvidraco, from Oujiang River, Lishui City, Zhejiang Province. Our results showed that the body length of adult females was significantly shorter than that of adult males. All other morphological traits were positively correlated with the body length. The t test of residuals indicated that adult females were significantly larger than adult males in eye diameter, head width, body depth, pelvic fin precoxal length and body weight, while there existed no apparent sex difference among other morphological traits. The analysis indicates that adult females of P.fulvidraco increase their the capacity of abdominal cavity and the breeding output through individual size increase and the morphological changes of abdomen.
Keywords:Pseudobagrus fulvidraco  Sexual dimorphism  Female reproduction
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