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Maturity and Spawning of Spinyhead Sculpin, Dasycottus setiger (Bean) in the East Sea, Korea  

Yang, Jae Hyeong (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute)
Lee, Sung Il (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute)
Hwang, Seon Jae (National Fisheries Research & Development Institute)
Park, Jong Hwa (National Fisheries Research & Development Institute)
Kwon, Hyeok Chan (East Sea Fisheries Research Institute, National Fisheries Research & Development Institute)
Park, Kie Young (Faculty of Marine Bioscience & Technology, Kangnung National University)
Choi, Soo Ha (Faculty of Marine Bioscience & Technology, Kangnung National University)
Publication Information
Korean Journal of Ichthyology / v.19, no.3, 2007 , pp. 179-184 More about this Journal
Abstract
Maturity and spawning of spinyhead sculpin, Dasycottus setiger were investigated using samples collected by the eastern sea danish seine and gillnet in the East Sea of Korea from January to December 2004. We analyzed monthly changes in maturity stages, gonadosomatic index (GSI), egg diameter, fecundity, total length at 50% group maturity, and sex ratio. GSI began to increase in August, reached a maximum between September and November, and decreased in December. The spawning period was August to December, and the main spawning period was September to November. The fecundity ranged from 6,210 eggs at 22.3 cm (TL) to 15,898 eggs at 32.2 cm (TL). The relationship between total length (TL) and fecundity (F) was $F=25.475TL^{1.818}$ ($R^2=0.761$), and F increased with TL. The TL at 50% group maturity was estimated to be 23.4 cm. The sex ratio was 1 : 1.3 (female : male), indicating the male population was seem to be slightly predominant.
Keywords
Dasycottus setiger; spinyhead sculpin; maturity; spawning; East Sea;
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Times Cited By KSCI : 1  (Citation Analysis)
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