BISC 204 Lecture Notes - Lecture 4: Indeterminate Growth, Fertility Medication, David Lack
5 Oct 2017
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Document Summary
The schedule of an individual"s life, including age at maturity, number of offspring, life span, number of reproductive opportunities (maturity, fecundity, aging, parity) On average, all individuals have one offspring that reaches reproduction---from dandelions to house finches to humans. Iteroparity: reproducing multiple times: for plants specifically, annual: living one year. Some species have life histories with high fecundity, short time to maturity, and poor survival (asian tiger mosquito) Embryonic: lasts 1-3 weels: 0-80 (~50%) survival. Larval (tadpole): lasts 8-12 weeks: ~70% surivial. Adult: lasts 8-20+ years, 300-700 offsprng/yr: 70-80% survival. They represent successful ways of allocating limited resources to carry out various functions of living organisms: survival, growth, reproduction, tradeoffs exist in the allocation of resources. Goal is to maximize lifetime reproductive success with limited resources. These are hypotheses that can be tested experimentally. Limited time & energy that must be allocated between demands. Exception: david reznick compared repo and non-repro trinidad guppies predict non-repro would grow bigger not true.
