摘要
为了解不同体色黄鳝的性别与体长、体重的差异,2011年5-7月,于洞庭湖地区随机采集灰色及黄色2种体色共208尾野生黄鳝,并对体长、体重及性别进行测量鉴定。样本中,雌性146尾,雄性62尾,雌雄比例为2.35∶1。其中黄色黄鳝83尾,灰色黄鳝125尾。分析结果表明,黄色黄鳝雌雄个体体重及肥满度均高于灰色群体;黄色黄鳝雌性体长大于灰色雌性,雄性小于灰色雄性。雌雄个体体重与体长的相关系数,黄色黄鳝分别为0.914、0.945,灰色黄鳝分别为0.567、0.438。黄色雌鳝比例随着体长的增加逐渐降低,雄性比例随体长的增加逐渐升高,雄鳝在35 cm以上占优势,40 cm之上雄性仅1尾。灰色雌鳝在40 cm以下占优势。2种体色黄鳝雌性比例与体重变化无明显规律。
The aim of the present study was to investigate the relationship between body length, body weight and sex of two body-color rice field eels （Monopterus albus）. The investigation was made on 208 wild eels sampled in Dongting lake area from May to July in 2011. There were 146 female eels and 62 males with the ratio of 2.35：1, including 83 yellow body-color eels and 125 grey body-color eels. The results showed that the body weight and condition factor of the yellow body-color eels were higher than grey body-color eels. Body length of yellow body-color female eels was higher than grey body-color female eels. However, body length of yellow body-color male eels was lower than grey body-color male eels. Correlation index between body weight and body length of yellow female eels, yellow male eels, grey female eels and grey male eels were 0.914, 0.945, 0.567, and 0.438, respectively. The number of yellow body-color female eels decreased with the increasing of body length, and male eels increased with the increasing of body length, being the dominance above 35 cm body length. For grey eels, female eels were dominant under 40 cm body length, and male eels were dominant above 40 cm body length. No significant relationship was observed between sex and body weight of the two kinds of body color eels.
出处
《水生态学杂志》
北大核心
2014年第1期77-80,共4页
Journal of Hydroecology
基金
湖南省科技厅项目(2012NK3076)
湖南农业大学稳定人才基金项目(09WD04)
关键词
黄鳝
体色
性别
体长
体重
Monopterus albus
body color
sex
body length
body weight
