A continuous time delay-difference type model(CTDDM) applied to stock assessment of the southern Atlantic albacore Thunnus alalunga  

作　　者：廖宝超 刘群 张魁 Abdul BASET Aamir Mahmood MEMON Khadim Hussain MEMON 韩亚楠 

机构地区：[1]Department of Fisheries,Ocean University of China [2]South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences [3]Marine Fisheries Department,Fish Harbor,West Wharf

出　　处：《Chinese Journal of Oceanology and Limnology》2016年第5期977-984,共8页中国海洋湖沼学报（英文版）

基　　金：Supported by the Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes(No.201022001)

摘　　要：A continuous time delay-difference model(CTDDM) has been established that considers continuous time delays of biological processes.The southern Atlantic albacore(Thunnus alalunga) stock is the one of the commercially important tuna population in the marine world.The age structured production model(ASPM) and the surplus production model(SPM) have already been used to assess the albacore stock.However,the ASPM requires detailed biological information and the SPM lacks the biological realism.In this study,we focus on applying a CTDDM to the southern Atlantic albacore(T.alalunga) species,which provides an alternative method to assess this fishery.It is the first time that CTDDM has been provided for assessing the Atlantic albacore(T.alalunga) fishery.CTDDM obtained the 80%confidence interval of MSY(maximum sustainable yield) of(21 510 t,23 118 t).The catch in 2011(24 100 t) is higher than the MSY values and the relative fishing mortality ratio(F_(2011)/F_(MSY)) is higher than 1.0.The results of CTDDM were analyzed to verify the proposed methodology and provide reference information for the sustainable management of the southern Atlantic albacore stock.The CTDDM treats the recruitment,the growth,and the mortality rates as all varying continuously over time and fills gaps between ASPM and SPM in this stock assessment.A continuous time delay-difference model （CTDDM） has been established that considers continuous time delays of biological processes. The southern Atlantic albacore （Thunnus alalunga） stock is the one of the commercially important tuna population in the marine world. The age structured production model （ASPM） and the surplus production model （SPM） have already been used to assess the albacore stock. However, the ASPM requires detailed biological information and the SPM lacks the biological realism. In this study, we focus on applying a CTDDM to the southern Atlantic albacore （T. alalunga） species, which provides an alternative method to assess this fishery. It is the first time that CTDDM has been provided for assessing the Atlantic albacore （T. alalunga） fishery. CTDDM obtained the 80% confidence interval of MSY （maximum sustainable yield） of（21 510 t, 23 118 t）. The catch in 2011 （24 100 t） is higher than the MSY values and the relative fishing mortality ratio （F2011/FMSY） is higher than 1.0. The results of CTDDM were analyzed to verify the proposed methodology and provide reference information for the sustainable management of the southern Atlantic albacore stock. The CTDDM treats the recruitment, the growth, and the mortality rates as all varying continuously over time and fills gaps between ASPM and SPM in this stock assessment.

关 键 词：continuous time delay-difference model(CTDDM) Southern Atlantic Thunnus alalunga maximum sustainable yield(MSY) biological reference points(BRPs) 

分 类 号：S932.4[农业科学—渔业资源]