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Steep recruitment relationships result from modest changes in egg to recruit mortality rates
Fisheries Research ( IF 2.4 ) Pub Date : 2021-01-16 , DOI: 10.1016/j.fishres.2020.105872
Ray Hilborn , Carl J. Walters

Increasing recruitment per mature adult as density declines is a key factor in being able to sustainably exploit populations and the extent of this increase is closely related to the sustainable exploitation rate of fish stocks. Stock-recruitment estimates typically show surprisingly large increases in egg to recruitment survival as density declines. Because egg to recruit survival rates are often very low, we found that compensatory reductions in total instantaneous egg to recruit mortality rate needed to average just 22–29 % to explain the large increases in egg to recruit survival.



中文翻译:

鸡蛋与鸡蛋死亡率的适度变化会导致陡峭的招聘关系

随着密度的下降,每个成年成年人的增加招聘是能够可持续地开发种群的关键因素,而这种增长的程度与鱼类种群的可持续开发率密切相关。种群招聘估计值通常显示,随着密度的下降,鸡蛋到募集存活的数量惊人地增加。因为鸡蛋募集存活率通常很低,所以我们发现,总瞬时鸡蛋募集死亡率的补偿性降低平均仅需要22–29%,才能解释鸡蛋募集存活率的大幅提高。

更新日期:2021-01-18
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