Natural Selection Favors Behaviors that Increase Fitness

Natural Selection Favors Behaviors that Increase Fitness -...

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Natural Selection Favors Behaviors that Increase Fitness Foraging Behavior – adequate nutrition is key to fitness Cost vs. Benefit Analysis
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Risk of Predation Being eaten while foraging is a big risk Most species forage efficiently in areas that they are at low risk to be eaten by some other organism
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1/31/11 Mating Behavior and Mate Choice Affected by Sexual Selection Mating Systems and Parental Care Promiscuous Monogamous Polygamous Polygyny- one male many females
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Unformatted text preview: Polyandry-one female many males 1/31/11 What Affects Mating Systems Needs of the Young If young need 2 parents to survive, then the species is usually monogamous If the young can survive with little care, then we see promiscuous behavior Certainty of Paternity Internal fertilization makes the male unsure if the young are his Resulting in little male care External fertilization males often care for the young...
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This note was uploaded on 01/30/2011 for the course BIOL 001 taught by Professor Nathan during the Spring '10 term at George Mason.

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Natural Selection Favors Behaviors that Increase Fitness -...

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