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NTIS 바로가기한국수산과학회지 = Korean journal of fisheries and aquatic sciences, v.53 no.1, 2020년, pp.1 - 8
김한주 (국립수산과학원 기반연구부 연근해자원과) , 박정호 (국립수산과학원 기반연구부 연근해자원과) , 권대현 (국립수산과학원 기반연구부 연근해자원과) , 김영혜 (국립수산과학원 기반연구부 연근해자원과)
The reproductive biology of largehead hairtail Trichiurus japonicus, from near Jeju Island, Korea was investigated based on 4,384 individuals collected by commercial vessel from November 2016 to October 2019. There were more female specimens than male specimens (2.64:1). T. japonicus preanal lengths...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
갈치류가 분포하는 해역은? | 갈치류(Trichiurus spp.)는 전세계 온대와 열대해역에서 모두 분포하며(Fishbase, 2019), 형태적으로는 비슷하나 DNA 차이가 있어 나라마다 다른 종으로 분류된다. 우리나라에 서식하는 갈치도 Trichiurus lepturus로 동정하였지만, 미토콘드리아 DNA 중 COI 영역을 분석한 결과 T. | |
갈치의 국내 어획량 추이는 어떻게 변화하였는가? | 우리나라에 서식하는 갈치(Trichiurus japonicus)는 가장 중요한 상업어종 중 하나이며, 어장은 대부분 남해안과 제주도 해역이다(NIFS, 2013). 국내 어획량은 1980년대에 평균 12만 4천톤이였지만, 최근 5년동안의 평균 어획량은 4만 4천톤(KOSIS 2019)으로 감소되는 추세이다. | |
현재까지 이루어진 갈치 생활사에 대한 선행연구 결과 갈치의 산란기는? | 현재까지 이루어진 갈치 생활사에 대한 선행연구를 살펴본 결과, 갈치는 4월부터 10월까지 긴 산란기를 가지며, 산란장은 남해 연안과 서해 남부해역으로 알려져 있다(Kwok and Ni, 1999; Kim et al., 2011). |
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