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- IGUCHI KEI'ICHIRO
- National Research Institute of Fisheries Science, Fisheries Research Agency
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- ITO FUMINARI
- National Research Institute of Aquaculture, Fisheries Research Agency
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- OGAWA KOGI
- Faculty of Fisheries, Nagasaki University
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- MATSUBARA NAOTO
- National Research Institute of Fisheries Science, Fisheries Research Agency
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- YODO TAIGA
- Japan Science and Technology Corporation
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- YAMASAKI TSUGIKO
- Faculty of Fisheries, Nagasaki University
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抄録
We investigated stress responses of ayu Plecoglossus altivelis under the hypothesis that overcrowding during transport can be a stressor and the stress predisposes fish to disease by decline in immunocompetence. The extent of stress response was determined under different fish densities. As inferred from the serum concentration of cortisol 1 day after the treatment, the density at more than 23 kg/m3, which was within the range of normal transporting procedures, acutely evoked intense stress responses. To examine a possible way to reduce the stress response of fish under crowding conditions, we compared two fish groups established in water tanks with circulating (whirling) and turbulent currents at the same density. The cortisol levels 1 day after the treatment were 2.5-fold higher in turbulent current than in whirling current. Fish in whirling current formed a school, while those in turbulent current aggregated with each other. Schooling of fish induced by water flow may reduce their stress responses during transport. A transport system with a directional water flow should keep fish in good condition without reducing the number of fish contained.
収録刊行物
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- Fisheries science
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Fisheries science 68 (4), 849-853, 2002
公益社団法人 日本水産学会
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詳細情報 詳細情報について
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- CRID
- 1390001204427916032
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- NII論文ID
- 130003903697
- 10009267804
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- NII書誌ID
- AA10993718
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- COI
- 1:CAS:528:DC%2BD38XmvV2gu7o%3D
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- ISSN
- 14442906
- 09199268
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- NDL書誌ID
- 6268142
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可