我国东南沿海带鱼种群问题的初步研究

A PRELIMINARY STUDY ON THE POPULATION OF THE RIBBON FISH,TRICHIURUS HAUMELA(FORSK(?)L),ALONG THE SOUTHEASTERN COAST OF CHINA

本文以我国东南沿海各带角生殖群为基础,试图通过各生殖群形态特征的测定比较和环状沉淀反应的对比分析,并参考分布洄游和渔期资料,对我国东南沿海带鱼种群问题作了初步研究。根据各生殖群之间的形态特征并无统计上的显著差异,各生殖群肌肉蛋白之间在沉淀反应上的一致性等试验观察结果,以及"北带南游"和渔期顺序推移等渔业资料,作者认为海礁、大陈、牛山、兄弟岛和碣石等带鱼生殖群应属于同一个地方种群,也就是所谓南方群系。

Samples of spawning shoals were collected from five principal spawning grounds along the southeastern coast of China.Basing upon the comparative analyses of the morphological characters and serological study,together with the data on tagging experiment and the fishing seasons,the results are sum- marized as follows: The averages of meristic and morphometric characters between spawing shoals show slight statistical differences and the frequency distributions of meristic characters,such as the dorsal rays,the gill-rakers,etc.,are similar in different spawning shoals.Corresponding antigens,such as muscle proteins of different spawning shoals are serologically indistiguishable,but serologic diffe- rences have been found between muscle proteins from different species of rib- bon fishes.These relationships are represented graphically in a three dimension- al model.The results of the precipitin test closely follow conclusions drawn from morphologic evidence.Hence,the authors consider that these five spawning shoals,from Haichiao,Tachen,Niushan,Hsiungtitao and Chiehshih,belong to the same group,the so-called southern local population.They coexist in the same geographic district and are not completely isolated during spawning sea- sons.