Water temperature induced interannual variation in spawning of Japanese Spanish mackerel Scomberomorus niphonius in the northern Yellow Sea  

作　　者：Mengzhen PAN Chi ZHANG Yongjun TIAN Qinghuan ZHU 

机构地区：[1]Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES),and Key Laboratory of Mariculture,Ministry of Education,Ocean University of China,Qingdao 266100,China [2]Laboratory for Marine Fisheries Science and Food Production Processes,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266237,China [3]Graduate School of Agricultural Science,Tohoku University,Sendai 9808572,Japan

出　　处：《Journal of Oceanology and Limnology》2023年第4期1620-1627,共8页海洋湖沼学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(NSFC)(No.41930534)。

摘　　要：Japanese Spanish mackerel Scomberomorus niphonius is a pelagic,neritic species that occurs in the Yellow Sea in high commercial value.The spawning period of this fast-growing species is controlled by water temperature.Based on microstructural analysis of otoliths from 145 young-of-the-year(YoY)S.niphonius collected by trawl in 2017,2018,and 2020,and the temporal variation in the spawning period in the northern Yellow Sea,and its relationship to water temperature were examined.We found that the spawning lasted from late April to late June but differed in year:in 2017 it occurred from April 23 to June 1 and peaked in early May,in 2018 it extended later from May 7 to June 29,and in 2020 from May 6 to June 22 and peaked later from late May to mid-June.The highest temperature in 2017 corresponds with the earliest end of the spawning period and a lower growing degree-day(GDD,℃·day)of 383℃·day.In 2018,slower warming corresponds with a longer spawning period,and a GDD spawning period of 506℃·day.Rapid warming in late 2020 corresponds with a spawning peak,and a GDD spawning temperature of 448℃·day.Despite differences in spawning period,the water temperature when spawning commenced was 10-12℃.Therefore,water temperature is the major determinant of the spawning period,affecting both the starting and the ending of spawning.This study improved our understanding of the spawning dynamics and environmental adaptation of S.niphonius,and how these might change in environments subject to increased warming.

关 键 词：otolith microstructure Scomberomorus niphonius spawning period yellow sea water temperature 

分 类 号：S931.1[农业科学—渔业资源]