Term
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Definition
| an assessment to determine whether the cost of activity is less than the benefit that can be expected from the activity- costs measured in energy, probability of injury, or being killed; benefits measured in gain of energy or increase in reproductive success |
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Term
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Definition
| the size that results in the largest relative benefit |
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Term
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Definition
| a general term for multiple matings in organisms, called polyandry, if mutliple males are involved, or polygyny if multiple females |
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Term
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Definition
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Term
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Definition
| compromises between two desirable but incompatible activities |
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Term
time minimization
(fits most migration data) |
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Definition
| complete migration in the minimum possible time; birds should optimize overall speed of migration, which means the birds will waste energy to achieve this- desirable strategy if early arrival at the destination is an improtatant fitness advantage (get it over with) |
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Term
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Definition
| complete migration with the least energy cost; this will be selected for when the risks associated with migration are relatively high and the use of energy during migration is high-net result from this will be some waste of energy on an annual basis, birds are expected to minimize stopover times and increase migration speed (total cost of flying) |
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Term
| cost of transportation minimization |
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Definition
| second energy minimization strategy but focuses on the overall goal of minimizing total energy use over the entire annual cycle- the energy used in migration is only one part of the annual energy use for migratory birds and minimizing energy in migration typically results in using more energy over the whole annual cycle; optimizes migration cost but within the whole annual cycle rather than only restricted migraiton period(annual energy budget) |
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