摘要:
根据2000年春(4月)、夏(6月)、秋(9月)、冬(12月)四季东海、黄海底拖网鱼类资源调查资料,使用因子分析的方法分析了该海域鱼类数量分布的季节变化特征。R型分析发现,春季关系最密切的鱼种有4种:斑鳐、凤鲚、海鳗和黑鳃梅童鱼;夏季有5种:鳀、小黄鱼、黄鮟鱇、绿鳍鱼和长蛇鲻;秋季也有5种:带鱼、灰鲳、虻鲉、日本鲭和小黄鱼;冬季有3种:带鱼、鳄齿鱼和发光鲷。历史资源调查证实,夏季的这5个鱼种之间以摄食与被摄食关系为主。进一步分析发现,各季节关系密切的鱼种所聚集分布的水域,正是这些鱼种各季对应的生理周期洄游分布的主要水域。根据Q型分析可以得到各季的综合优势鱼种及其优势分布水域,发现带鱼和小黄鱼是东海、黄海渔业资源的绝对优势鱼种,除了带鱼、小黄鱼以外,其他的综合优势鱼种都是一些价值较低的、生长速度较快的小型鱼类。
关键词:
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东海 /
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黄海 /
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底层鱼类 /
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季节变化 /
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因子分析
Abstract:
On the basis of the data from bottom traw l surveys in 4 seasons of 2000 in the East China Sea and the Huanghai Sea,studies on the seasonal characteristics of fish quantity distribution are conducted by the method of factor analysis.By R type analysis,the results show that there are 4 species,Rajakanojei,Coiliamystus,Muraenesox cinereus and Collichthys niveatus,which are correlated closely in spring;and 5 species,Engraulis japonicas,Pseudosciaenapolyatis,Lophius litulon,Chelidonichthys kumu and Saurida elongate,in summer;and 5 species,Trichiurus haumela,Pampus nozawae,Erisphex potti,Pneumatop horus japonicas and Pseudosciaena polyatis,in autumn;and 3 species,Trichiurus haumela,Champsodon capensis and Acropomajaponicum,in winter.By the approbation of historic survey information,the main relation among the 5 species of spring is the relation between preys and predators.By the promoted analysis,it is discovered that the water areas where correlative species of each season assembled together are correspond to these areas where these species take physiology cycling migrations in each season Based on Q type analysis,the synthesis predominant species in each season and their mainly distributed water area can be got.The results show that Trichiurus haumela and Pseudosciaenap olyatis are the absolute predominant species in the East China sea and the Huanghai Sea Except the two synthesis predominant species,the others are all smallty pefishes which are all with low value and quick growth characteristics
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