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农学
仔鱼饥饿“不可逆点”
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starvation in larvae ("the point-of-no-return"; PNR)
仔鱼饥饿“不可逆点”
在饵料缺乏的情况下,初孵仔鱼达50%或100%死亡时的饥饿时间。又称仔鱼饥饿“致死临界期”、仔鱼“不可逆转饥饿”(irreversible starvation)、仔鱼“生态死亡”点。是从生态学角度评价仔鱼的饥饿耐力的一项指标。常用此作为仔鱼“生理死亡”的界限。
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leave the land but not the native country
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leaving the country within a time limit
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