BIO 3303 Lecture Notes - Lecture 22: Guppy, Invertebrate, Semelparity And Iteroparity
Document Summary
Allocating resources to reproduction reduces the amount of resources available for. Individuals have a limited amount of resources that can be allocated to specific aspects of their life history. An allocation to one aspect reduces the resources available for other aspects growth. The trade-offs shape the life history of an organism. These tradeoffs include: mode of repercussion, age at first reproduction, allocation to reproduction, number and size of eggs, young, or seeds, timing of reproduction. These trade-offs are imposed by physiological, energetic, and environmental constraints. These factors can be classified as intrinsic (evolutionary history) or extrinsic (physical environment) Benefits of asexual reproduction: offspring are genetically identical to parent so are adapted to the local environment, all individuals are able to reproduce, giving the potential for high population growth. Costs of asexual reproduction: loss of genetic recombination introduces no variation among offspring, lack of variation means less ability to respond to changes in environmental conditions.
