摘要
本文报道了１９９２—１９９４年连续３年采自海南至辽宁（包括台湾）沿海７个代表性河口地区鳗苗群体的主要形态特征比较研究结果。４项计数性状和３项度量性状，差异系数分析结果未达到亚种差异水平；判别函数显示，大多数群体间存在显著差异，这种差异应源于遗传变异。各年差异变化无规律，可能与鳗苗漂游分布的随机性有关。
This paper deals with comparison on morphological characters of the elver (AnguillajaPonica Temminck et Schlegel) stock. Samples were collected from seven representative estuaries, Wan Quan He (Hainan), Dong Gang (Taiwan), Han Jiang (Guangdong), Min Jiang(Fujian), Qian Tang Jing (Zhejiang), Chang Jiang (Jiangsu) and Yalu Jiang (Liaoning)Rivers, during the upstream migration periods from 1992 to 1994. According to the 75% ruleof Mayr's subspecies identifications, no subspecies had been found among stocks from various estuaries by means of coefficient of difference (CD). The discriminate function analysis ofseven meristical and morphometrical characters indicated that there were significant difference (F> FO.o1 ) among stocks from most estuaries in the same years. We believed that thesedifferences might be caused by genetically heterogeneity. Since the change of these differencesin various years was unregular, it may be closely related to the random of drift and range ofelvers.
基金
八五重点科技项目
关键词
鳗鲡
鳗苗
群体
形态特征
水产养殖
Anguillid elvers, Stock, Morphological character, Representative estuaries in China Coast
