한국 남해에 출현하는 먹장어 Eptatretus burgeri의 재생산 특성
Reproduction characteristics of hagfish Eptatretus burgeri in the South Sea of Korea
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초록
남해안에서 어획된 먹장어를 사용하여 재생산 특성을 분석하였다. 생식소중량지수 및 매월 난경변화로 산란기와 최소성숙크기를 특정하였다. GSI의 월변화로 부터 산란기는 8-9월로 추정되었고, 발달이 진행되고 있는 10mm 이상의 난은 3월에 출현하였고, 7월에 가장큰 크기의 난이 출현하였다. 산란 최소크기는 34.2cm였다. 포란수는 각각 34.2cm에서 13개, 77.0cm에서 117개 범위였고, 체장이 증가하면서 난수도 선형적으로 증가하였다.
Abstract
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.
참고문헌 (11)
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