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http://dx.doi.org/10.5657/KFAS.2014.0059

Seasonal Characteristics of Todarodes pacificus Paralarval Distribution in the Northern East China Sea  

Kim, Jung Jin (Fishery and Ocean Information Division, National Fisheries Research & Development Institute)
Kim, Cheol-Ho (Ocean Circulation and Climate Research Division, KIOST)
Lee, Joon-Soo (Fishery and Ocean Information Division, National Fisheries Research & Development Institute)
Kim, Suam (Department of Marine Biology, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.47, no.1, 2014 , pp. 59-61 More about this Journal
Abstract
We conducted eight surveys in the northern East China Sea (ECS) in winter (February - April), summer (July), and autumn (October) 2004-2009, to investigate the seasonal distribution of T. pacificus. A total of 482 paralarvae, ranging in mantle length (ML) from 1.0 - 17.0 mm, were collected at 73 out of 181 stations. There were higher numbers of paralarvae during the winter and summer months than in the autumn. There was significant seasonal variation in the paralarval mantle lengths; mantle lengths were longer in winter (April) than in summer (July). The position of oceanic fronts in the study area played an important role in restricting paralarval distribution along the inshore edge of the Tsushima Warm Current (TWC). When the TWC expanded to western Jeju Island in winter and autumn, the paralarval distribution range extended to include western Jeju Island. However, when the TWC was located southeast of Jeju Island in the summer, paralarvae were distributed along the frontal zone off southeast Jeju Island. Sites at which paralarval mantle length was <2.0 mm ML indicated that the spawning ground were likely to be within the northern ECS in winter and summer, but north of the study area in autumn.
Keywords
Common squid; Distribution; Northern East China Sea; Paralarvae; Todarodes pacificus;
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