摘要
为研究马苏大麻哈鱼不同月龄表型性状的生长规律及生长特征,并判定其最佳生长季节的规格与月龄之间的关系,对2~6月龄马苏大麻哈鱼的叉长、全长、体质量、头长、体高、眼径、尾柄长和尾柄高等8个表型性状进行主成分和判别分析。结果表明,各月龄马苏大麻哈鱼表型性状之间多呈显著的正相关(P<0.05),2月龄和3月龄中个别性状之间呈现负相关,尤其3月龄眼径与其他各表型性状之间呈现明显的负相关或不显著相关(P>0.05),2~6月龄中叉长和全长之间的相关性最显著。各月龄马苏大麻哈鱼第一主成分均为增长、增加质量因子,2~3、5~6月龄马苏大麻哈鱼早期生长阶段第二主成分均为眼径因子,第三主成分为尾柄因子。整体来讲,马苏大麻哈鱼在增长、增加质量的同时,眼径也在不断增加,尾柄部的生长也在加速进行。通过建立判别函数来判断错过最佳生长季节马苏大麻哈鱼的规格与大小相符的月龄,判别分析结果表明,总的判别准确率为96.7%,其中2、3、5月龄判别准确率为100%。
In order to research the growth of morphological traits of masou salmon Oncorhynchus masou and to judge the age matching with the size of masou salmon at the best growing season, data were collect- ed from 300 samples at 2--6 month old, including the fork length, total length, body weight, eye diame- ter,body depth,caudal peduncle length, and caudal peduncle depth. The morphometric characteristics of the fish were analyzed by principal component and discriminant analysis. The results showed that most characteristics traits of masou salmon at different month ages were positive correlation （P^0. 05）, less characteristics were negative correlation at 2 month old and 3 month old. The relationships between the fork length and total length were described as relatively higher, between relatively lower or negative corre- lation with diameter and other traits at 3 month old eye. The first principal component always reflects the growth and body weight gain of masou salmon at all the age phases. In 2--3 month old and 5--6 month old, the second and third principal components reflect the eye diameter factor and caudal peduncle factor, respectively. In a word, the eye diameter and caudal peduncle were ever-growing along with the growth and body weight gain. The month old closely related to the size of masou salmon which had missed the best growing period was deduced by established discriminant functions, with the overall discriminant accuracy of 96.7%, even 100% in 2, 3 and 5 month old masou salmon.
出处
《水产科学》
CAS
CSCD
北大核心
2017年第6期707-713,共7页
Fisheries Science
基金
农业部财政专项物种资源保护项目(2010-2016)
关键词
马苏大麻哈鱼
表型性状
主成分分析
判别分析
Oncorhynchus masou
morphological trait
principal component analysis
discriminant analysis
