摘要
以中华绒螯蟹幼蟹为研究对象 ,每只幼蟹分别测量 30个形态性状参数 ,用聚类分析和逐步判别两种方法进行综合处理和比较分析。 (1)聚类分析结果表明 :长江、瓯江幼蟹形态相近 ,而辽河幼蟹与上述两者的形态差异较大 ;(2 )用逐步判别筛选出的 14个形态参数的判别分析表明 :三个种群间的形态差异极显著 (P <0 .0 1) ,判别准确率为 :81.4%～ 88.4% (P1)和 82 .5 %～ 91.4% (P2 ) ,判别效果依次为辽河蟹 >瓯江蟹 >长江蟹 ,平均拟合概率为 85 .5 % ;(3)进一步用上述 14个形态参数中对判别分析贡献较大的 9个形态参数作判别分析 ,构建了种群判别公式 ,平均拟合概率虽降至 80 .4% ,但可减少测定和计算工作量的 36 % 。
This paper studies on juvenile crab. 30 metric parameters representing morphological characters were measured and then analyzed comprehensively by the cluster analysis and the stepwise discrimination. (1) The results of cluster analysis shows: The morphology of juvenile Chinese mitten crab from Yangtze river is much similar to that from Oujiang river, but quite different from that of Liaohe river's. (2) The result of stepwise discrimination based on 14 morphological parameters shows there is a significant difference among the populations of juvenile crab from three rivers (P<0.01), the correct rates of discrimination are: 81.4%～88.4% (P 1) and 82.5%～91.4%(P 2). The discriminating efficiency is Liaohe> Oujiang > Yangtze. The average fitted probability is 85.5%. (3) The discriminant analysis, based on further selected 9 morphological parameters, with better contributions to the identification, give less average fitted probability -80.4%, but decrease the work amount in measurement and calculation significantly(36%), which is highly recommended to application in juvenile crab study.
出处
《水产学报》
CAS
CSCD
北大核心
2001年第2期120-126,共7页
Journal of Fisheries of China
基金
国家"九五"攻关项目 ( 96 0 0 8 0 1 0 3 0 5 )
关键词
中华绒螯蟹
幼蟹
形态判别
辽河
长江
瓯江
Eriocheir sinensis, juvenile crab
morphological discrimination, Liaohe river, Yangtze river, Oujiang river
