Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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Effects of Water Temperature and Salinity on the Growth and Survival of Larvae and Juvenile of Platycephalus indicus

수온과 염분이 양태 자치어의 성장과 생존에 미치는 영향

  • Jin Lee (Department of Fisheries Sciences, Chonnam National University) ;
  • Ji-Won Yun (Department of Fisheries Sciences, Chonnam National University) ;
  • Sung-Hoon Lee (Department of Fishery, Marine, Industry, Tourism, and Leisure, Chonnam National University) ;
  • Kyeong Ho Han (Department of Fisheries Sciences, Chonnam National University)
  • 이진 (전남대학교 수산과학과) ;
  • 윤지원 (전남대학교 수산과학과) ;
  • 이성훈 (전남대학교 수산해양산업관광레저융합학과) ;
  • 한경호 (전남대학교 수산과학과)
  • Received : 2023.01.25
  • Accepted : 2023.02.22
  • Published : 2023.02.28
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Abstract

The water temperature and salinity have an important effect on the growth and survival of rearing fish. This study investigates the effect of water temperature and salinity on larvae and juveniles of Platycephalus indicus. The experimental water temperature was set to 13, 16, 19, 22, and 25℃, respectively, and the salinity was set to 7, 14, 21, 28, and 32 psu, respectively. Ten individuals were randomly collected daily and measured the total length using a stereo microscope. The growth rate was the highest at 25℃ (21.62±0.14 mm), 28 psu (15.02±0.05 mm) and the lowest at 13℃ (7.04±0.05 mm), 7 psu. The survival rate was the highest at 22℃ (69.2%), 32 psu (84.1%) and the lowest at 13℃ (15.1%), 7 psu. This study demonstrates that the water temperature and salinity affected the survival and growth of Platycephalus indicus larvae and the juvenile.

실험구의 수온은 13, 16, 19, 22, 25℃로 설정하였고, 염분농도는 각각 7, 14, 21, 28, 32 psu로 설정하였으며, 200 L 플라스틱 원형수조에 부화 자어를 각각 500마리씩 수용하였다. 성장은 수온 25℃(21.62±0.14 mm TL)와 염분 28 psu (15.02±0.05 mm TL)에서 가장 높았고, 수온 13℃ (7.04±0.05 mm TL)와 염분 7 psu에서 가장 낮았다. 생존율은 수온 22℃(69.2%)와 염분 32 psu (84.1%)에서 가장 높았으며, 수온 13℃(15.1%)와 염분 7 psu에서 가장 낮았다. 양태는 강어귀 또는 연안 해역에 서식하여 채집이 가능한 어종으로 다른 해수 어종에 비해 염분 내성이 강하였다.

Keywords

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