不同来源黄鳝(Monopterus albus)繁殖力的比较分析

The Comparison of Individual Fecundity of Monopterus albus from Different Sources

中文关键词: 黄鳝  繁殖力  来源  体色

英文关键词: Monopterus albus  Fecundity  Sources  Body color

中文摘要:

      比较不同来源黄鳝(Monopterus albus)的个体繁殖力，研究了其个体繁殖力分布特征、变化规律及与生物学指标的关系。以怀卵量作为绝对繁殖力的表征参数，对雌性黄鳝进行解剖测定。结果显示，野生黄鳝绝对繁殖力(F)为181–729粒，人工培养黄鳝F值为165–589粒，人工繁育黄鳝F值为135–352粒；野生黄鳝基于体重的相对繁殖力(FW)为5.4–11.8粒/g，人工培养黄鳝FW为3.5–9.3粒/g，人工繁育黄鳝FW为4.96–8.55粒/g；野生黄鳝基于体长的相对繁殖力(FL)为5.8–17.2粒/mm，人工培养黄鳝FL为4.85–15.00粒/mm，人工繁育黄鳝FL为4.35–9.03粒/mm，不同来源黄鳝在F、FL、FW上均有极显著差异(P<0.01)。来源和体色均不同的黄鳝其F和FL均具有极显著差异，而FW差异不显著；所有黄鳝的F和野生黄鳝的FL与体长、体重生物学指标密切相关，其余F、FL和FW与各生物学指标均相关性较小。研究表明，野生黄鳝的F、FL和FW均高于人工培养和人工繁育的黄鳝，怀卵量优势明显。

英文摘要:

      Monopterus albus were widely distributed in the freshwater in China except for the Northwest and Southwest Plateau. M. albus were artificially propagated and cultured in the middle and lower reaches of the Yangtze River. Currently the sources of parents of include the wild, the artificial culture, and artificial propagation. In this study we compared the fecundity of M. albus from different sources, and investigated their distribution, variation, and biological indexes of individual fecundity. We found that the absolute fecundities (F) of wild female, artificial cultured female and artificially propagated female were 181–729 eggs, 165–589 eggs, and 135–352 eggs respectively. The individual relative fecundities to weight (FW) of the three groups were 5.4–11.8 eggs/g, 3.5–9.3 eggs/g, and 4.96–8.55 eggs/g respectively. As for the individual relative fecundities to length (FL), the values were 5.8–17.2 eggs/mm, 4.85–15.00 eggs/mm, and 4.35–9.03 eggs/mm respectively. There were highly significant differences in FW and FL (P<0.01) between the three groups. Moreover, there were significant differences in F and FL, but not FW, between individuals with both different sources and body colors. F of all subjects and FL of the wild subjects were strongly correlated to the body weight and length. F, FL and FW of wild female M. albus were all higher than those of the artificial cultured and artificial propagated M. albus, and the former exhibited obvious advantage in fecundity. Our study will provide important guidance for the population construction and refined breeding of M. albus.