Foraging Behavior - The Search for Food

Optimizing its foraging behavior

1. When the difference between the energetic benefits of food consumption  and the energetic costs of food gathering is maximized.

2. Animals with optimal foraging strategies will have more available energy with which to survive and reproduce.

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Amount of change in allelic frequency due to migration

m= proportional of migratory individual in  recipient population

qI – frequency of allele in source population  

qII – frequency of allele in recipient population

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Adaptation is a characteristic that enhances the survival or reproduction of organisms .

Adaptations have evolved by natural selection, which is the centerpiece of On the Origin of Species

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Adaptation has costly side effects

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Fitness 

Fitness is defined as the relative reproductive success of one genotype compared with other genotypes in the population

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Fitness- Average number of offspring produced by a genotype and divide it by the mean number of offspring produced by the most prolific genotype

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Average fitness

In a species, only 1 of every 1000 seeds survives to reproductive age, and that those that survive produce an average of 3000 seeds.