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 ㎛. The relationship between TL and fecundity (F) was F = 63.574 TL - 1471.3 (R2=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.

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 References

• 양재형(국립수산과학원 동해수산연구소 자원환경과) | Jae-Hyeong YANG (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science) Corresponding author
• 조정현(국립수산과학원 동해수산연구소 자원환경과) | Jung-Hyun CHO (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
• 김종빈(국립수산과학원 동해수산연구소 자원환경과) | Jong-Bin KIM (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
• 박정호(국립수산과학원 연근해자원과) | Jeong-Ho PARK (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science)
• 이수정(국립수산과학원 동해수산연구소 자원환경과) | Soo-Jeong LEE (Fisheries Resources and Environment Research Division, East Sea Fisheries Research Institute, National Institute of Fisheries Science)
• 윤병선(국립수산과학원 남해수산연구소 자원환경과) | Byoung-Sun YOON (Fisheries Resources and Environment Research Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science)