منابع مشابه
Evolution of mammal life histories
If we assume that adult life span and age-at-maturity are described correctly by quarter power allometries across (typical) mammal species, we are tempted to look for some fundamental explanation. The explanation must acknowledge that within-species growth is sigmoid and not a power function at all, and that natural selection probably sets the age at maturity in the face of externally imposed m...
متن کاملEconomics and the evolution of life histories.
B irth and death are subjects of perennial interest. They are shaped by both physiology and behavior, which are themselves shaped (presumably) by natural selection. Thus, it seems natural to suppose that evolutionary ideas would form the core of demography. This, however, is not the case. Students of birth and death are largely divided: social scientists call the subject demography, and evoluti...
متن کاملEvolution of alternative insect life histories in stochastic seasonal environments
Deterministic seasonality can explain the evolution of alternative life history phenotypes (i.e., life history polyphenism) expressed in different generations emerging within the same year. However, the influence of stochastic variation on the expression of such life history polyphenisms in seasonal environments is insufficiently understood. Here, we use insects as a model and explore (1) the e...
متن کاملPotential responses to climate change in organisms with complex life histories: evolution and plasticity in Pacific salmon
Salmon life histories are finely tuned to local environmental conditions, which are intimately linked to climate. We summarize the likely impacts of climate change on the physical environment of salmon in the Pacific Northwest and discuss the potential evolutionary consequences of these changes, with particular reference to Columbia River Basin spring/summer Chinook (Oncorhynchus tshawytscha) a...
متن کاملEvolution of reproductive life histories in island birds worldwide.
Island environments typically share characteristics such as impoverished biotas and less-seasonal climates, which should be conducive to specific adaptations by organisms. However, with the exception of morphological studies, broad-scale tests of patterns of adaptation on islands are rare. Here, I examine reproductive patterns in island birds worldwide. Reproductive life histories are influence...
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ژورنال
عنوان ژورنال: Evolution
سال: 2004
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.0014-3820.2004.tb01745.x