2003年夏季东海区带鱼资源状况及其秋冬汛渔况的分析

根据东海区渔业资源动态监测网调查资料,对2003年伏季休渔期间的带鱼资源状况进行了分析,并展望了秋冬汛带鱼生产前景。结果表明,2003年伏季休渔前期(6月),东海区带鱼资源重量密度、资源尾数密度及发生量均比常年偏低、产卵期个体重量较常年偏大,亲鱼量属低水平年份;伏季休渔中期(7月、8月),带鱼的产卵群体比例下降,个体平均肛长偏小。同时,海区的水温较2002年偏低,不利于带鱼生长和发育。预计伏季休渔结束后,渔获状况不容乐观,秋冬汛生产前景将差于2002年。

ANALYSES ON THE HAIRTAIL FISHERY RESOURCES STATUS IN THE EAST CHINA SEA REGION IN SUMMER 2003 AND ITS FISHING CONDITIONS IN AUTUMN AND WINTER SEASONS

Based on the survey data conducted by East China Sea Region Fishery Resources Dynamic and Minitor Net, an analysis of the hairtail resources during summer closed season was made and the hairtail production prospects for autumn and winter fishing seasons were given. The result showed that hairtail stock density-at-weight, stock density-in-number and amount of larvae were all lower than normal years, individual weight in spawning period was higher than normal year and the amount of broodstock was at low level in the East China Sea Region in earier stage of summer closed season (June), while in the middle stage (July and August), the proportion of hairtail spawning stock decreased and the length of annus on the average was short. Meanwhile, the water temperature was lower than that of 2002, which was unfavourable for the growth and develepment of hairtail. It can be expected that when summer closed season is over, catch condition will not be optimism and the prospects for the production in autumn and winter fishing seasons will be poorer than in 2002.