수온이 미치는 볼락 Sebastes inermis 치어의 내인성 및 식후 암모니아 배설의 영향
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Title
- 수온이 미치는 볼락 Sebastes inermis 치어의 내인성 및 식후 암모니아 배설의 영향
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Alternative Title
- Effect of temperature on endogenous and postprandial ammonia excretion of dark-banded rockfish Sebastes inermis
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Author(s)
- 오승용; 최상준; 조재윤; 명정구
- KIOST Author(s)
- Oh, Sung Yong(오승용)
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Alternative Author(s)
- 오승용; 명정구
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Publication Year
- 2009-07-10
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Abstract
- The effect of water temperature on daily pattern and rate of total ammonia nitrogen (TAN) excretion in juvenile dark-banded rockfish Sebastes inermis (mean body weigh: 14.8±0.3 g) under fasting and feeding conditions was investigated. Fish were acclimated over 10 days under three different water temperatures (15, 20 and 25℃). After 72 hours of fasting, fasting TAN excretion was measured at each temperature. And then, to investigate post-prandial TAN excretion, fish were hand-fed with a commercial diet containing 47.7% crude protein for 7 days, two times daily 09:00 and 17:00 h. Water was sampled for both the inlet and outlet of chamber every 2 h over a 24 h period. Both of fasting and post-prandial TAN excretion increased with the increase of water temperature (P<0.05). Mean fasting TAN excretion rates at 15, 20 and 25℃ were 8.1, 9.0 and 9.2 mg TAN kg fish-1 h-1, respectively. The value of 15℃ was lower than those of 20 and 25℃ (P<0.05), but there was no significant difference between 20℃ and 25℃. Mean post-prandial TAN excretion rates at 15, 20 and 25℃ were 20.1, 22.9 and 23.4 mg TAN kg fish-1 h-1, respectively. A peak post-prandial TAN excretion rate occurred after 12 hours from the first feeding at 15℃ (mean 28.7 mg TAN kg fish-1 h-1), 20℃ (33.7 mg TAN kg fish-1 h-1) and 25℃ (36.8 mg TAN kg fish-1 h-1), respectively. The TAN loss for ingested nitrogen at 15℃ (36.2%) was lower than that of 20℃ (40.8%) and 25℃ (41.7%). As overall results, water temperature exerts a profound influence on the nitrogen metabolism of juvenile dark-banded rockfish.
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/29380
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Bibliographic Citation
- 한국수산과학회 양식분과, 세계양식학회 한국지부 공동학술대회, pp.48 - 53, 2009
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Publisher
- 한국수산과학회 양식분과, 세계양식학회 한국지부
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Type
- Conference
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Language
- Korean
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