Maximum sustainable yield estimation of enhancement species with the characteristics of movement inside and outside marine ranching  

作　　者：Yingbin WANG Wei ZHANG 

机构地区：[1]School of Fisheries,Zhejiang Ocean University,Zhoushan 316022,China

出　　处：《Journal of Oceanology and Limnology》2021年第6期2380-2387,共8页海洋湖沼学报（英文）

基　　金：Supported by the National Key Research and Development Program of China(No.2019YFD0901304);the Basic Public Welfare Research Project of Zhejiang(No.LGN21C190009);the Science and Technology Project of Zhoushan(No.2017C41012)。

摘　　要：Marine ranching can be regarded as a type of artificial fishery,and its construction aims at the sustainable utilisation of fishery resources.Therefore,the sustainable yield level of target species in marine ranching has become one of the concerns of stakeholders.The enhancement surplus production model proposed by Wang(2021)based on the traditional surplus production model can be used to assess the sustainable utilisation of settled species in marine ranches.However,when the target species has the characteristics of migration inside and outside marine ranches,its sustainability assessment will be aff ected.Based on the movement range and resource density levels of enhancement species inside and outside marine ranches,we built a biomass change model that is suitable for enhancement species with migration characteristics inside and outside marine ranches(migration enhancement biomass model).Moreover,we simulated the effects of factors,such as the ratio of the movement range and the ratio of resource density within and outside marine ranches and the fishing strategy for the enhancement species in marine ranches,on the estimation of maximum sustainable yield(MSY).Results show that the large movement range of enhancement species outside marine ranches was associated with the obvious advantage of the proposed migration enhancement model over the traditional enhancement production model.A small difference in the densities of enhancement species inside and outside marine ranches was highly beneficial for improving the accuracy of MSY estimation.The migration enhancement biomass model proposed in this study provides an idea for estimating the MSY of an enhancement species that migrates inside and outside marine ranches.Researchers can adjust the parameters of the model in accordance with the actual situation of resource distribution and changes to improve the scientificity of fishery stock assessment.

关 键 词：marine ranching stock enhancement and releasing MIGRATION production model maximum sustainable yield(MSY) 

分 类 号：S932[农业科学—渔业资源]