Using statolith shape analysis to identify fi ve commercial Loliginidae squid species in Chinese waters  

作　　者：Jianzhong GUO Dan LIU Chi ZHANG Yongjun TIAN Zhixin LI 

机构地区：[1]Fisheries College,Ocean University of China,Qingdao 266003,China [2]Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES),Ocean University of China,Qingdao 266100,China [3]Laboratory for Marine Fisheries Science and Food Production Processes,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266071,China

出　　处：《Journal of Oceanology and Limnology》2021年第3期1160-1167,共8页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(NSFC)(Nos.41930534,41861134037);the National Key Technology R&D Program of China(Nos.2018YFD0900902,2018YFD0900903)。

摘　　要：Identification of squids in the family Loliginidae is a time-consuming exercise because of the highly overlapping distributions of species and their overall similarity(fin shape and size,sucker ring dentition,and color).Identifying squid based on statolith morphology is considered more accurate than identifying species based on beaks or gladius morphology.We report and compare the statolith shape offive commercially Loliginidae squid(Uroteuthis(Photololigo)duvaucelii,U.edulis,U.chinensis,Loliolus beka,L.japonica)to determine how well these structures discriminate species.Based on statolith morphology,variation in the lateral and dorsal domes enables an 84.8%success rate at classifying species.Environmental factors correlate with statolith shape,and for vertically migrating squid,statolith relative size decreases with increased depth of habitation.Statolith morphology can be used to effectively and accurately identify species of Loliginidae squid occurring in Chinese waters,and may prove valuable for identifying and managing squid resources.

关 键 词：statolith shape analysis Loliginidae squid fishery management Chinese waters 

分 类 号：S917.4[农业科学—水产科学]