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Maturation and Spawning of Black Seabream Acanthopagrus schlegeli in the Southern Sea of Korea  

Kwon, Hyeok Chan (Department of Fisheries Physics, Pukyong National University)
Zhang, Chang Ik (Department of Fisheries Physics, Pukyong National University)
Shin, Young Jae (Department of Fisheries Physics, Pukyong National University)
Kim, Kwang Hoon (Department of Fisheries Physics, Pukyong National University)
Kim, Joo Il (South Sea Fisheries Research, NFRDI)
Seo, Young Il (South Sea Fisheries Research, NFRDI)
Publication Information
Korean Journal of Ichthyology / v.21, no.2, 2009 , pp. 93-99 More about this Journal
Abstract
The maturation and spawning of Black seabream Acanthopagrus schlegeli were investigated using samples randomly collected in the Southern Sea of Korea from March 2007 to February 2008. The FL at 50% sex-changers maturity was estimated to be 26.7 cm. We estimated monthly changes in maturity stages and gonadosomatic index (GSI). The spawning period ranged from March to July, and the peak spawning occurred in May and June. The fecundity (F) was 839,600 eggs at 32.2 cm fork length (FL) to 2,894,913 eggs at 42.0 cm FL, and the relationship between FL and F was expressed as $F=1.264FL^{3.869}$ ($R^2=0.736$). The FL at 50% group maturity was estimated to be 25.8 cm for females and 19.0 cm for males. The sex ratio was 19.9% for female, 20.9% for early sex-changers, 28.7% late sex-changers, 30.5% for male.
Keywords
blackseabream; Acanthopagrus schlegeli; maturation; spawning; reproduction;
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