BIO120H1 Lecture 7: Biology Lecture 7 notes
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BIO120H1 Full Course Notes
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Document Summary
Typical life history for higher plants & animals. Grow for a period without reproducing: this period is for resource accumulation. When have enough resources, become mature, start spending resources on reproduction: organisms show various lifestyles after sexual maturity. Need to consider age structure of populations to: better predict population trajectories, understand paradoxes of evolutionary ecology. Different species have different lx curves because of the different conditions that they encounter. Type 1: invest a lot, but produce little offspring. Type 3: produce a lot of tiny, cheap disposable offspring (most likely to die off) Senescence: breakdown of cells and systems at old age. Fecundity schedules: bx: born female of age during x to x+1 reproduve period is delayed because of the resource-accumulation phase. Having excess reproduction is not beneficial towards survivorship. Making offspring is costly to the persistence of survival of that offspring. The more fruits you make the lower the relative growth rate will be.
