The reproduction characteristics of hagfish Eptatretus burgeri were examined using individuals caught in the South Sea of Korea. The spawning season and size at minimum sexual maturity of this species were characterized based on a gonad-somatic index (GSI) and monthly variation egg size (long axis). From monthly variation of GSI, the spawning season was estimated to be from August to September. Developing eggs larger than 10 mm were found in March, and the largest egg size was found in July. The first spawning length was 34.2 cm TL. Batch fecundity ranged from 13 to 117 eggs for hagfish sized from 34.2 cm TL to 77.0 cm TL, respectively, and increased linearly with total length.

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 References

• 김두남(국립수산과학원 원양자원과) | Doo-Nam KIM (Distant Water Fisheries Resources Research Division, National Institute of Fisheries Science)
• 황강석(국립수산과학원 제주수산연구소) | Kang-Seok HWANG (Jeju Fisheries Research Institute, National Institute of Fisheries Science)
• 차형기(국립수산과학원 연근해자원과) | Hyung-Kee CHA (Coastal Water Fisheries Resources Research Division, National Institute of Fisheries Science)
• 박준수(국립수산과학원 수산자원연구센터) | Jun-Su PARK (Fisheries Resources Research Center, National Institute of Fisheries Science)
• 김정년(국립수산과학원 수산자원연구센터) | Jung-Nyun KIM (Fisheries Resources Research Center, National Institute of Fisheries Science)
• 문성용(국립수산과학원 수산자원연구센터) | Seong-Yong MOON (Fisheries Resources Research Center, National Institute of Fisheries Science)
• 이정훈(국립수산과학원 독도수산연구센터) | Jeong-Hoon LEE (Dokdo Fisheries Research Center, National Institute of Fisheries Science) Corressponding author