摘要
阐述了北部湾红鳍笛鲷的资源状况,对基于体重的单位补充量渔获量和亲体生物量进行了分析。在当前开捕体重为0.5kg的条件下,现阶段的捕捞死亡系数为0.72,未超过Fmax水平,单位补充量剩余亲体量是未开发状态的28%,因此资源群体既未出现生长型过度捕捞,也未出现补充过度捕捞。建议在不改变开捕体重的情况下,将目前的捕捞死亡系数减少到0.42,相应地单位补充量亲体生物量约增加1.4倍,亲体剩余量恢复到国际上建议的鱼类种群健康利用40%水平,而平衡条件下的单位补充量渔获量仅减少6%,未对渔业生产形成不利影响。
The present study assessed the stock status of Lutjanus erythropterus in Beibu Gulf. Weight-based yield per recruit （YPR） and spawning-biomass per recruit （SPR） analyses were used for this assessment.Current fishing mortality is 0.72, lower than Fmax and SPR is 28% of unexploited level with 0.5 kg weight at first capture. Therefore, neither growth over-fishing nor recruitment over-fishing happened. SPR will increase to 1. 4 times that of at present and recover to sustainable level 40% suggested by international recommendation, while YPR will only decrease by 6% if fishing mortality is decreased to 0.42.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2009年第4期460-465,共6页
Journal of Shanghai Ocean University
基金
国家自然科学基金(30771653)
农业部北部湾渔业资源调查与监测(0509109
0704152)
