2011 Fiscal Year Final Research Report
Effect of ocean acidification due to increasing seawater CO_2 concentration on early development and growth of fishes
| Project/Area Number |
21310013
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Nagasaki University |
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Principal Investigator |
ISHIMATSU Atsushi 長崎大学, 大学院・水産・環境科学総合研究科, 教授 (00184565)
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| Co-Investigator(Kenkyū-buntansha) |
KURIHARA Haruko 琉球大学, 亜熱帯島嶼科学超域研究金推進機構, 特任助教 (40397568)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 生物海洋 / 海洋酸性化 |
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| Research Abstract |
Two species of clownfish (Amphiprion clarkii and A. ocellaris) and a minnow (Oryzias javanicus) was used in this project to investigate effects of elevated CO2 and temperature rise on early development (A. clarkii and A. ocellaris) and effects of long-term exposure to elevated CO_2 on growth and reproduction (O. javanicus). Embryos of both clownfish species developed normally under 1000 ppm CO_2 conditions. Rearing at elevated temperature (31, 32℃ vs 29℃) resulted in significantly lower survival and enhanced deformity in A. clarkii, although these negative effects were not observed in A. ocellaris. Long-term exposure of O. javanicus to 1000 ppm CO_2 did not exert any significant negative impacts on all parameters studied (survival, growth, oxygen uptake rate, acid excretion rate, fecundity, and the size of just hatched larvae).
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