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Relationship between Sex Reversal, Body Weight and Age of Monopterus albus
Author(s): YANG Dai-qin, CHEN Fang, RUAN Gu-liang, SU Ying-bing
Pages: 45-
47
Year: 2008
Issue:
4
Journal: Journal of Yangtze University(Natural Science Edition)
Keyword: 黄鳝(Mono pterus albus Zuiew); 性转变; 年龄; 体重;
Abstract: 研究了黄鳝(Monopterus albus Zuiew)性转变与体重、年龄的关系.结果表明,黄鳝性别与体重关系密切,体重在50.0 g以下的黄鳝,均为雌性个体;体重在50.1~75.0 g的黄鳝,开始出现性转变;体重在100.1~125.0 g,雄性比例开始超过雌性的比例;体重在125.1~300.0 g之间,随着体重的增加,雄性比例逐步增加,而雌性的比例逐步减少;体重超过300.0 g的个体,则全部为雄性个体.1龄、2龄黄鳝均为雌性个体.3龄黄鳝开始出现性转变,4龄黄鳝的雄性比例超过雌性比例;5~8龄的个体,随着年龄的增长,雌性比例逐渐减少,雄性比例逐渐增加;9~11龄的个体,仍然有雌性个体.
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