水产学报2016，Vol.40Issue(5)：721-730,10.DOI:10.11964/jfc.20150609921
死亡因素对放流明对虾群体资源变动及生物学参考点影响的量化评估
Impacts of mortality factors and uncertainty on the population and biological reference points in stock Chinese shrimp fishery
摘要
Abstract
In order to evaluate the factors affecting the yield of released fishery resources and impact of their uncertainty on the amount of resources and catch,as well as on biological reference points (Fmax and F0.1),The uncertainty was introduced into the parameters about growth and mortality,and based on the developed yield per recruit (YPR) model,and the dynamics of released Chinese shrimp was simulated,and difference index was applied to evaluate the difference between based scenario and other scenarios.Four factors influencing mortality,i.e.,environment change,predation,intake sea water and illegal fishing,were shown to have similar influence on resource biomass.They had greater impacts on resource reduction when the mortality was high.At the same mating death rate,the impact on catch quantity was greater when the mating occurred earlier.Contrast to scenario 1,when four factors influencing mortality are at low level and the mating death occurred later,the BPR at the beginning and end of fishing,and accumulated YPR at the end of fishing increased by 14.38％,24.88％ and 17.28％,respectively.In the absence of uncertainty,the level of mortality factors occurring before fishing did not impact the biological reference points;after the introduction of uncertainty to mortality factors and the parameters in length-weight relationship,as well as VBGF,although F0.1 and Fmax did not display the certain specific trend with the uncertainty increasing,they were possibly underestimated when the age-structure YPR model was used.And the effects of introduced uncertainty on the mean and median of biological reference points are different,the mean and median of Fmax,and the median ofF0.1 did not change obviously with the uncertainty,and the max mean ofF0.1 is 3.52 times the min mean.Additionally,the C.V.F0.1 is between 392.15％ and 630.28％ at the three levels of uncertainty,and then the C.V.Fmax is from 24.99％ to 48.48％ under the same conditions.So,the better technigues were applied to improve the effect of stock Chinese shrimp fishery,and the impact of mating must be taken into consideration in formalating the fishing strategy.Compared with mean of BRP,the median has an advantage in resisting disturbance of uncertainty introduced into mortality and parameters of VBGF when stock assessment was made.关键词
中国明对虾/死亡因素/不确定性/生物学参考点/增殖渔业Key words
Fenneropenaeus chinensis/mortality factors/uncertainty/BRP/stocking fishery分类
农业科技引用本文复制引用
徐海龙,陈新军,陈勇,谷德贤,乔秀亭..死亡因素对放流明对虾群体资源变动及生物学参考点影响的量化评估[J].水产学报,2016,40(5):721-730,10.基金项目
上海地方高校大文科学术新人培育计划(B5201120003) （B5201120003）
农业部北方海水增养殖重点实验室基金(2014MSENCKF09)Local Colleges and Universities in Shanghai Liberal Arts Academic Programme (B5201120003) （2014MSENCKF09）
Key Laboratory of Maricalture & Stock Enhancement in North China's Sea,Ministry of Agricalture,China (2014MSENCKF09) （2014MSENCKF09）
