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http://dx.doi.org/10.3796/KSFOT.2018.54.4.296

Maturity and spawning of the pointhead flounder, Hippoglossoides pinetorum in the coastal waters off Gangwon-do, East Sea  

YANG, Jae-Hyeong (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
CHO, Jung-Hyun (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
KIM, Jong-Bin (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
PARK, Jeong-Ho (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science)
LEE, Soo-Jeong (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
YOON, Byoung-Sun (Fisheries Resources and Environment Research Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science)
Publication Information
Journal of the Korean Society of Fisheries and Ocean Technology / v.54, no.4, 2018 , pp. 296-305 More about this Journal
Abstract
Maturity and spawning of the pointhead flounder, Hippoglossoides pinetorum were investigated on the basis of samples collected in the coastal waters off Gangwon-do, East Sea from January 2012 to December 2013. The average total length of H. pinetorum was 25.0 cm and 21.9 cm for females and males, respectively. The spawning period was from May to July according to monthly changes gonadosomatic index (GSI) and maturity stages. The spawning period in Gangwon-do was delayed relatively to that in Gyeongbuk-do. The mature egg diameter ranged between $300-700{\mu}m$. The relationship between TL and fecundity (F) was F = 63.574 TL - 1471.3 ($R^2=0.7603$), that is, the larger total length, the more fecundity H. pinetorum had. We estimated that the TLs at 50% group maturity were 25.6 cm for females and 19.9 cm for males. The spawning ecology by sea area should be considered efficient resource management for H. pinetorum. Furthermore, it is necessary to study more on the relationships among growth, maturity and water temperature variations in the East Sea.
Keywords
Maturity; Spawning; Pointhead flounder; Hippoglossoides pinetorum;
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