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タイトル: Monitoring of the physiological status as the heat stress tolerance in the rotifer: a novel test for health diagnosis and ecological monitoring
著者: YOSHINAGA, Tatsuki
TANAKA, Chikaya
YASUDA, Hideaki
キーワード: Brachionus plicatilis
heat stress
live food
mass culture
発行日: 2008年8月20日
出版者: International Coastal Research Center, Ocean Research Institute, the University of Tokyo
掲載誌情報: Coastal marine science. Vol.32 No.1, 2008.8, pp. 1-8
抄録: To develop a simple method to evaluate physiological condition of the rotifer Brachionus plicatilis, important species as a live-food for aquaculture, we examined the heat stress tolerance using a household microwave oven. The rotifers were previously acclimated at each of 15°C, 20°C and 35°C, and exposed to heat treatment at every 10°C with the highest at 45°C. Subsequently, the animals were returned to the original temperature, and survival rates were recorded until 24 hours after the treatment. Under the 45°C-treatment, the animals acclimated at 15°C showed significantly lower survival rate (29%) than those at 25°C and 35°C with 75% and 84%, respectively. In contrast, under the treatments below 35°C, the survival rates were constant around 80% regardless of the acclimation temperature. These results suggest that the heat stress tolerance can be examined by the microwave oven, and the method will be useful at hatcheries for stable mass culture of the rotifer.
URI: http://hdl.handle.net/2261/20984
ISSN: 13493000
出現カテゴリ:Coastal Marine Science
Coastal Marine Science

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