摘要
运用单位补充量产卵量(egg production per recruit,EPR)模型评价了北部湾二长棘鲷资源状况。推测在当前捕捞死亡系数下,EPR为5 963.51粒.尾-1,相当于未开发状态下的15.49%,表明该渔业已处于过度捕捞状态。管理策略模拟分析发现实施禁渔期和改变开捕体长,都可使EPR得到提高。取得相同资源管理目标时,EPR模型估算的捕捞死亡系数明显高于单位补充量亲体量(spawner biomass per recruit,SBR)模型。建议可将F20%EPR作为北部湾二长棘鲷渔业管理的限制生物学参考点。若要到达该目标,相关捕捞努力量需削减15.53%或者将开捕年龄延长到1a。
The status of the crimson tai resource in Beibu Gulf is assessed using egg produciton per recruit model（EPR）.It is estimated that EPR is 5963.51 and 15.49% of the unexploited level under the current fishing mortality rate indicating that the fishery is overfished.Modelling analysis shows that the closed season and larger length at capture can improve EPR.Fishing mortality estimated by EPR model is lager than that by spawner biomss per recruit（SBR） model to achive the same management objective.It is necessary to reduce relevant fishing effort by 15.53% or extend age at capture to 1a,therefore,EPR can be above 20% of the unexploited level.
出处
《农业系统科学与综合研究》
CSCD
2011年第4期444-448,共5页
System Sciemces and Comprehensive Studies In Agriculture
基金
国家自然科学基金(30771653)
农业部海水养殖生态与质量控制重点开放实验室基金(2008B1205)
关键词
二长棘鲷
单位补充量产卵量
繁殖力
生物学参考点
Parargryrops edita
egg production per recruit（EPR）
fecundity
biological reference points
