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Ammonia tolerance of Japanese anchovy Engraulis japonicus: Implications for cost reduction in a skipjack pole-and-line fishery
https://oacis.repo.nii.ac.jp/records/2211
https://oacis.repo.nii.ac.jp/records/22118d80cbf0-1f74-4805-b4e5-cf3b4c19266b
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-09-21 | |||||
タイトル | ||||||
タイトル | Ammonia tolerance of Japanese anchovy Engraulis japonicus: Implications for cost reduction in a skipjack pole-and-line fishery | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題 | ammonia toxicity, median lethal concentration, fish culture, fish transportation | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
著者 |
Oda, Kentaro
× Oda, Kentaro× Hashimoto, Hiroshi× Teruya, Kazuhisa× Dan, Shigeki× Hamasaki, Katsuyuki |
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書誌情報 |
水生動物 en : Aquatic Animals 巻 AA2021, p. AA2021-1, 発行日 2021-01-17 |
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抄録 | ||||||
内容記述 | The Japanese anchovy Engraulis japonicus is used as live bait in skipjack pole-and-line fisheries. Japanese anchovies are transported to fishing grounds by fishing boats on voyages that can take from 4 to 50 days. Because ammonia excreted by Japanese anchovies might affect their survival during transportation, fishers empirically attempt to maintain them in healthy condition by exchanging water aboard ship holding tanks at a rate of 160–500 % volume h−1. To develop protocols for more efficient and cost-effective transportation of Japanese anchovies, we evaluated their ammonia tolerance and effects of stocking density and variable water exchange on their survival. We estimated median lethal concentrations (with 95 % confidence intervals) of un-ionized ammonia nitrogen (UIAN), at which 50 % of Japanese anchovies had died within 24 h and 48 h, as 0.770 (0.751–0.790) mg l−1 and 0.706 (0.661–0.750) mg l−1 at 15 °C and 0.634 (0.466–0.802) mg l−1 and 0.450 (0.379–0.521) mg l−1 at 25 °C, respectively. While the UIAN concentration increased to lethal levels and severe fish mortality (dependent on stocking density) occurred at 25 °C with no water exchange, the UIAN concentration could be maintained within non-lethal levels at 25 °C and with a one-third water exchange every 12 h. Our results suggest that present-day empirically deduced water exchange rates applied aboard commercial vessels in holding tanks of Japanese anchovies could be reduced, implying a possible cost reduction for the skipjack pole-and-line fisheries |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2434-8643 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.34394/aquaticanimals.AA2021.0_AA2021-1_1 | |||||
情報源 | ||||||
関連識別子 | https://doi.org/10.34394/aquaticanimals.AA2021.0_AA2021-1_1 | |||||
関連名称 | Publisher's Version/PDF (OpenAccess) | |||||
情報源 | ||||||
関連識別子 | http://aquaanimal.net/ | |||||
関連名称 | アクオス研究所 | |||||
出版者 | ||||||
出版者 | アクオス研究所 |