Mertz G, Myers R A
Department of Fisheries and Oceans, Northwest Atlantic Fisheries Centre, St. John's, Newfoundland, Canada.
Math Biosci. 1996 Jan 15;131(2):157-71. doi: 10.1016/0025-5564(95)00036-4.
A simple modification of a frequently employed age-structured model for population dynamics is presented. This augmented formulation allows the assessment of the impact of age-dependent harvest mortality on population stability. The characteristic frequencies of the predicted oscillations are discussed. The period of oscillation is almost independent of survival and the exact functional form of the recruitment function, and it is not equal to twice the mean age of mature animals, as suggested earlier. It is shown that increased survival before reproduction has a destabilizing influence for populations exhibiting an overcompensatory recruitment function.
本文提出了一种对常用的年龄结构种群动态模型的简单修正。这种扩展公式允许评估年龄依赖性捕捞死亡率对种群稳定性的影响。讨论了预测振荡的特征频率。振荡周期几乎与生存率和补充函数的确切函数形式无关，并且它并不像之前所认为的那样等于成熟动物平均年龄的两倍。结果表明，对于具有过度补偿补充函数的种群，繁殖前生存率的提高具有破坏稳定性的影响。
