Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Parturition and Early Growth of Crowned Seahorse, Hippocampus coronatus in Korea

한국산 해마, Hippocampus coronatus의 출산과 초기성장

  • Choi Young-Ung (Faculty of Applied Marine Science Cheju National University) ;
  • Rho Sum (Faculty of Applied Marine Science Cheju National University) ;
  • Jung Min-Min (Jeju Fisheries Research Institute, NFRDI) ;
  • Lee Young-Don (Marine & Environmental Research Institute, Cheju National University) ;
  • Noh Gyoung-Ane (Corea, Center, Ornamental Reef fish & Aquariums)
  • 최영웅 (제주대학교 해양생산과학부) ;
  • 노섬 (제주대학교 해양생산과학부) ;
  • 정민민 (국립수산과학원) ;
  • 이영돈 (제주대학교 해양과환경연구소) ;
  • 노경언 (한국해수관상어종묘센터)
  • Published : 2006.05.01
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Abstract

The recent decrease in wild stocks of seahorse, Hippocampus coronatus, has prompted the production of the species in captivity. We here present data on the body color changes of the species according to culture conditions. This investigation examined relationship between adult body size and clutch and growth in 60 days after parturition and survival of juveniles with four fed enriched Artemia nauplii, copepod nauplii and copepod adult. Seahorse adults ($77.77{\pm}9.84mm$, n=12) collected from Kamak Bay and Yeoja Bay from August 2003 to November 2004 gave a parturition of $6\sim75$ juveniles (Mean, 39 juveniles/male/time) for 14 times. A day old seahorses were $14.48{\pm}1.38mm$ (n=15) in standard length (SL) with 14 dorsal fin rays, 12 pectoral fin rays and 4 anal fin rays. Sixty-day old seahorses were $24.65{\pm}0.83mm$ (n=4) in SL. Growth rate of seahorses was 0.18 mm/day at 24 in 60 days after parturition. When offered Artemia nauplii and copepod nauplii, 5 day old sea-horses preferred copepod nauplii to Aremia nauplii with a maximum predation rate of 31 copepod nauplii/sea-horse/h. However 30-day old seahorses preferred selected Artemia nauplii with a maximum predation rate of 14 Artemia nauplii/seahorse/h. Survival was highest (49%) when offered copepod nauplii together with enriched Artemia nauplii.

체색의 변화가 다양하여 관상용으로 가치가 높은 Hippocampus coronatus의 안정적인 번식기술을 개발하기 위하여 가막만과 여자만 부근해역의 잘피밭에서 채집 한 후 실험실에서 사육하면서 어미의 출산특성, 자치어의 성장 및 초기자어사육에 알맞은 먹이조건을 조사하었다. $7{\sim}11$월에 가막만과 여자만에서 출현한 체장(SL) $53.91{\sim}87.31 mm$ (평균 $77.76{\pm}9.84 mm$, n=12) 범위의 개체들이 실험실내에서 $6{\sim}75$ 개체(평균 39 ind./male/time)를 출산하였다. 출산 직후 자어의 크기는 $11.69{\sim}15.81 mm$(평균 $13.7{\pm}1.3 mm$, n=15)였고 몸통과 꼬리의 체륜수는 10 그리고 39개였으며 가슴지느러미, 등지느러미 그리고 뒷지느러미 줄기수는 각각 12, 14 그리고 4개였다. 출산 후 60일에는 $23.48{\sim}25.29 mm$ (평균, $24.65{\pm}0.83 mm$, n=4)로 성장하였고 일간성장률은 0.18 mm/day였다. Copepod와 Artemia를 혼합 공급하여 포식량을 조사한 결과 출산 후 5일째에 copepod nauplii의 포식량은 평균 21 ind./larva/hour였고 Artemia napulii의 포식량은 평균 3 ind./larva/hour로 copepod nauplii에 대한 선호도가 높았고 출산 후 30일째에는 copepod nauplii에 대한 포식량이 평균 5 ind./larva/hour, 그리고 Artemia napulii의 포식량이 평균 9 ind./larva/hour로 성장함에 따라 Artemia napulii에 대한 포식량이 증가하였다. 생존율을 고려한 먹이 공급방법에 있어서 Artemia nauplii와 copepod nauplii를 혼합 공급할 경우 생존율은 출산 후 50일에 48.9%로 향상된 결과를 얻을 수 있었다.

Keywords

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