Antarctic Krill Fishery Resource Assessment

The reasonable development and utilization of Euphausia superba is of great significance to the future human protein acquisition.Therefore,the resource assessment of Antarctic krill is of practical significance to the scientific development of resources.This paper makes use of fishery statistics data in CCAMLR website http://www.ccamlr.org/ statistical bulletin "CCAMLR₂017_Statistical_Bulletin_Volume₂9" and database data of http://www.fao.org/ website.After discussing the widely used residual yield model in fishery resources,the pellatomlinson model based on Bayes method was selected to evaluate the resources of Antarctic krill in the Antarctic Marine areas of 48.1,48.2 and 48.3 from 2006 to 2016.The resource evaluation results are given according to model parameters,resource amount and its trend,the fitting of theoretical model estimation results with actual data,and the convergence observation of MCMC parameter chain.The intrinsic growth r of Antarctic krill was determined to be 0.5.48.1,48.2 and 48.3 have environmental tolerances of 40 million t,19 million t and 20 million t respectively;The MSY of the three Marine krill was 5.5 million t,3.58 million t and 3.11 million t respectively.The ratios of resource amount and environmental tolerance of the three Marine areas in 2016 were 96.42%,96.20% and 98.25% respectively.The results showed that by 2016,the impact of human fishing on Antarctic krill resources in regions 48.1,48.2 and 48.3 was small,and the resources were almost close to the original resources.