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Sexual Maturity and Gonadal Development of Slime Flounder, Microstomus achne  

Byun, Soon-Gyu (Southeast Sea Fisheries Research Institute, NFRDI)
Kim, Sung-Yeon (Research and Development Planning Division, NFRDI)
Kim, Jin-Do (Pathology Division, NFRDI)
Lee, Bae-Ik (New Strategy Research Center, NFRDI)
Lee, Jong-Ha (Inland Fisheries Research Institute, NFRDI)
Han, Kyeong-Ho (Fisheries Science Institute, Chonnam National University)
Jeong, Min-Hwan (Aquaculture Management Division, NFRDI)
Publication Information
Korean Journal of Ichthyology / v.23, no.3, 2011 , pp. 179-186 More about this Journal
Abstract
Slime flounder, Microstomus achne is distributed in the coastal waters of Korea, west sea of Japan, BoHai, Yellow sea and East china sea. They are mainly caught by bottom trawl net during winter, from December to March. Sexual maturation of slime flounder were investigated using samples collected from commercial catch in the southern coast of Korea from November, 2006 to March, 2007. The ovary of the slime flounder is a conical bag in shape and is bilateral structure develops lengthily from the posterior of the abdomen to the end of the anal fin. The testis also is bilateral in structure, usually located in small size in the abdomen. In females, the gonadosomatic index (GSI) were peaked in January (12.46), then decreased rapidly thereafter. Female GSI values plummeted to 2.72 in March just after spawning. Male GSI values were peaked in December (2.46) before in the spawning season, then decreased slowly thereafter. The reproductive cycle would be classified into three successive developmental stages : maturation stage (November to January), ripe and spawning stage (December to February), degenerative and resting stage (February to March). Relationships between the fish sizes in total length (TL) and the number of ovarian eggs (F), the body weights (BW) and the number of ovarian eggs were indicated by the exponential equation respectively: F=29.027TL-767.8 (r$^2$=0.7686), F=0.3998BW+24.288 (r$^2$=0.8919).
Keywords
Slime flounder; GSI; gonadal development; sexual maturity;
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Times Cited By KSCI : 7  (Citation Analysis)
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