Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Spawning behavior and Early Life Histoty of the Liobagrus mediadiposalis in the Korean Endemic Species

한국 특산종 자가사리 (Liobagrus mediadiposalis)의 산란행동 및 초기 생활사

  • Choi, Nak-Hyun (Aquaculture Program, College of Fisheries and Ocean Sciences, Chonnam National University) ;
  • Seo, Won-Il (Yeonggwang Fisheries Office, NFRDL) ;
  • Kim, Chun-Chel (Inland Fisheries Research Laboratory Jeollanamdo Provincial Government) ;
  • Park, Chung-Kug (Aquaculture Program, College of Fisheries and Ocean Sciences, Chonnam National University) ;
  • Heo, Seung-Joon (Aquaculture Program, College of Fisheries and Ocean Sciences, Chonnam National University) ;
  • Yoon, Seung-Min (Gyeongsangbuk-do Fishery Resources Institute) ;
  • Han, Kyeong-Ho (Aquaculture Program, College of Fisheries and Ocean Sciences, Chonnam National University) ;
  • Lee, Won-Kyo (Aquaculture Program, College of Fisheries and Ocean Sciences, Chonnam National University)
  • 최낙현 (전남대학교 수산해양대학 양식생물학) ;
  • 서원일 (국립수산과학원 영광수산사무소) ;
  • 김춘철 (전라남도 내수면시험장) ;
  • 박충국 (전남대학교 수산해양대학 양식생물학) ;
  • 허승준 (전남대학교 수산해양대학 양식생물학) ;
  • 윤성민 (경상북도 수산자원개발연구소) ;
  • 한경호 (전남대학교 수산해양대학 양식생물학) ;
  • 이원교 (전남대학교 수산해양대학 양식생물학)
  • Published : 2008.12.31
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Abstract

To elucidate the spawning behavior and early life history of Liobagrus mediadiposalis, mature male and female fish were collected from a branch of the Seomjin River. Spawning was induced by injecting hormones, and then the spawning process and development of fertilized eggs, larvae, and juveniles were observed. Observations of spawning behavior showed that the female established a territory and built a spawning nest, and frequently pressed on the upper ventral part of the male to release her eggs. When spawning was finished, the fish supplied fresh water to the egg mass using their pectoral and caudal fins. Hatching began 189 h 20 min after fertilization at $21.5-23.5^{\circ}C$ (mean $22.7^{\circ}C$). The mean total length (TL) of newly hatched larvae was 7.18-7.39 mm (mean 7.31 mm). Their mouth and anus were already open and they had 14+24=38 myotomes. Eighteen days after hatching, the larvae were 12.71-13.79 mm (mean 13.27 mm) in TL and the yolk sac was absorbed completely. At 35 days after hatching, when all the fin-rays had formed, the juveniles were 15.84-17.92 mm (mean 16.33 mm) in TL.

Keywords

References

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