东海区马面资源变动及其原因的初步研究

A PRELIMINARY STRUDY ON THE STOCK VARIATIONS AND THEIR CAUSES OF FILEFISHES THAMNACONUS SPP. IN THE EAST CHINA SEA

根据７０至８０年代东海外海绿鳍马面资源和产卵场调查等资料以及１９７４年以来马面渔汛生产情况，分析研究了东海区马面资源的变动趋势。结果表明，近年来东海区黄鳍马面的分布范围和主要渔场正在逐渐扩大，渔期延长，年产量在波动中增长，资源量趋于上升，但渔获物以补充群体为主，过度捕捞和产卵场生态环境受到破坏是东海区绿鳍马面资源量急剧下降的主要原因。还提出绿鳍马面资源量的变化具有长周期的变化规律。

The variation of the stock size of the filefishes Thamnaconus septentrionalis and Thamnaconus hypargyreus was studied based on the data collected from the investigations of spawning ground of green-fin filefish in 1970's and 1980's, and the catch data from most of the state-running fishing companies since 1974. The results showed that the stock of yellow-fin filefish is slightly increasing in recent years, however the catch is mainly composed of the recruitment individuals. Fishing on this stock should be careful. The overexploitation and ecological damage of the spawning ground were the main causes of the collapse of the green-fin filefish stock. In the meantime, the author also suggested that a long-term circle similar to that Pacific herring had may exist in the variation of the green-fin filefish stock.