FECUNDITY, DEVELOPMENTAL TIME, AND POPULATION-GROWTH RATE - AN ANALYTICAL SOLUTION
FECUNDITY, DEVELOPMENTAL TIME, AND POPULATION-GROWTH RATE - AN ANALYTICAL SOLUTION
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DOI：
10.1016/0040-5809(80)90015-5
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发表时间：
1980-01-01
影响因子：
1.4
通讯作者：
HASTINGS, A
中科院分区：
文献类型：
--
作者：
CASWELL, H;HASTINGS, A
种群增长率受发育时间和净繁殖力的影响，并对这两个因素的相对重要性进行了研究。为离散模型和连续模型导出的简单解析表达式表明，复制发展单位转移的效果所需的生育能力的增加与人口增长率成正比，与存活率成反比。不需要对母性或存活函数的形式进行假设。虽然这些结果与广泛接受的r[内在增长率]选择倾向于快速发育时间的观点相一致，但它们产生了一个有点矛盾的预测，即K[承载能力]选择应该倾向于高繁殖产出。这个问题的解决可能涉及大多数当前分析中没有包括的约束。
Population growth rate [of Drosophila serrata] is affected by both developmental time and net fecundity, and the relative importance of these 2 factors was investigated. Simple analytical expressions, derived for both discrete and continuous models, show that the increase in fecundity required to duplicate the effect of a unit shift in development is directly proportional to population growth rate and inversely proportional to survival rates. No assumptions about the form of the maternity or survivorship functions are required. While these results agree well with the widely held notion that r[intrinsic rate of increase]-selection favors fast development time, they generate the somewhat paradoxical prediction that K[carrying capacity]-selection should favor high reproductive output. The resolution of this problem probably involves constraints not included in most current analyses.