한국발생생물학회지:발생과생식 (Development and Reproduction)
- 제12권2호
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- Pages.169-181
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- 2008
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- 2465-9525(pISSN)
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- 2465-9541(eISSN)
한국 서해산 병어, Pampus argenteus의 번식생태
Reproductive Ecology of the Silver Pomfret Pampus argenteus on the West Coast of Korea
- 정의영 (다이브코리아 한국해양환경생태연구소) ;
- 배주승 (국립수산과학원 목포수산사무소) ;
- 강희웅 (국립수산과학원 서해수산연구소) ;
- 이황복 (국립수산과학원 목포수산사무소) ;
- 이기영 (군산대학교 해양생명과학부)
- Chung, Ee-Yung (Korea Marine Environment & Ecosystem Research Institute) ;
- Bae, Joo-Seung (Mokpo Fisheries Office, National Fisheries Research & Development Institute) ;
- Kang, Hee-Woong (West Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
- Lee, Hwang-Bok (Mokpo Fisheries Office, National Fisheries Research & Development Institute) ;
- Lee, Ki-Young (School of Marine Life Science, Kunsan National University)
- 발행 : 2008.09.30
초록
2006년 1월부터 12월까지 한국 서해안 무안군 자운도 주변해역에서 안강망으로 채집한 병어, Pampus argenteus를 대상으로 조직학적 조사 및 형태 측정에 의해 번식 생태를 조사하였다. 병어는 자웅이체이며, 난소는 한 쌍의 낭상구조를 하고 있으며, 수많은 난소소엽으로 구성되어 있다. 정소는 엽상구조를 하고 있으며, 수많은 정소소엽으로 구성되어 있다. 암 수 개체들의 생식소중량지수(GSI), 간중량지수(HSI), 비만도지수(CF) 값들의 월별 변화는 2월(초기 성장기)부터 8월 (회복기 시작)까지는 생식소 발달단계와 아주 유사한 경향을 보이며 변하였다. 이들 지수값의 변화로부터 암컷과 수컷 개체들의 방란, 방정은 5월부터 7월까지 일어나는 것으로 추정되었다. 병어의 생식주기는 암컷의 경우, 초기성장기(2
Reproductive ecology of the silver pomfret, Pampus argenteus were investigated by histological observations and morphometric data. Samples were collected by the stow net at the coastal area of Jaun-Do, Muan-gun, Korea, from January to December, 2006. P. argenteus is dioecious, the ovary is composed of many ovarian lobules, showing a pair of saccular structure, and the testis is composed of many seminiferous lobules, showing a pair of lobular structure. From February (growing stage) to September (after spawning), monthly changes in the gonadosomatic index, hepatosomatic index, and condition factor in females and males showed similar patterns with the gonad developmental phases. Judging from the results of their indice, it is assumed that spawning in females and males occur from May to July. The reproductive cycle can be classified into five successive stages in females: early growing stage (February to March), late growing stage (March to April), mature stage (March to July), ripe and spent stage (May to July), and recovery and resting stage (July to February); in males, the cycle can be divided into four successive stages: growing stage (February to April), mature stage (March to June), ripe and spent stage (May to July), and recovery and resting stage (July to February). According to the frequency distributions of egg diameters in the breeding season, P. argenteus is presumed to be spring-summer spawning species and polycyclic species to spawn 2 times or more during one spawning season. Number of total eggs in absolute fecundity were proportional to body length and body weight, respectively. Number of total eggs in absolute fecundity per body weight were also proportional to the body length, but if the increase of body weight considerably increased, rather total eggs in relative fecundity decreased with the increase of body weight. Percentage of first sexual maturity of P. argenteus were over 50% in females and males of 12.1 to 15.0 cm in body length, and 100% for fishes over 18.1 cm in length. Therefore, both sexes were regarded to be sexually mature at one year of age.