コイにおける低温空気耐性の向上
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概要
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Lowering the temperature difference to 10°C between acclimatized water and air medium was conducted in order to elevate the cold air-tolerance of the young carp, <I>Cyprinus carpio</I>. For the specimen acclimatized to 17°C water, 100% survival times at 7°C air were examined after precooling with water of gradually decreasing temperature from 17°C to 7°C for setting times ranged from 1 h to 6h. Another treatment as precooling with air as well as starvations of 10 and 20 days under 17°C was investigated to clarify each influence over the cold air-tolerance of carp.<BR>The net elongation time for 100% survival by 2-6 h precooling was 5 h as the maximum. The precooling with air showed a negative effect on the survival time. Starvations for 10 and 20 days both had no effect on the extent of tolerance.
- 水産増殖談話会の論文
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