BIOEE 1780 Chapter Notes - Chapter 16: Evolutionarily Stable Strategy, Eusociality, Haplodiploidy
13 Oct 2016
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Senescence: a decline with age in per capita reproductive performance, physiological function, or the probability of survival (as they age, decline in some component of fitness) Antagonistic pleiotropy: when a genetic variant with beneficial effect on one trait also has a detrimental effect on some other trait; tradeoffs. Fitness: an individual"s proportional representation in subsequent generations. Main factors determining fitness are reproductivity and survival. Direct fitness: determined by the offspring an organism produces in its entire life. Galapagos iguanas: before el ni o, iguanas had 2 large eggs after, they had 3 small eggs because brown algae. Senescence; deaths at the same rate but nowpeople live longer. *behavior evolves through selection when (1)heritable, (2)variable, (3) influences fitness. *typically females invest more than males, so while they"re taking care of young, males are out, competing for limited females. Parental conflict- when parents have an evolutionary conflict of interest over the optimal strategy for parental care.
