Term
| Benefits of female choice (4) |
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Definition
find fertile or compatible mate
improve immediate survival or fecundity
choosy daughters produce ornamented sons
male ornament indicates offspring viability |
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Term
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Definition
| Choosy daughters produce ornamented sons. |
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Term
| Indicators of Direct Benefit of Choice (4) |
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Definition
Nuptial gifts and cannibalism
Territory
Sufficient Sperm
Parental Ability |
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Term
| Runaway Selection (Fisher) |
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Definition
| . Some traits—such as prominent plumage, elaborate courtship behaviours, or extreme body ornamentation—are so strongly preferred by females of certain species that they will mate only with those males possessing the strongest expression of the trait. In subsequent generations, male offspring are more likely to possess that physical trait, whereas female offspring are more likely to possess a preference for that trait in males. |
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Term
| Handicap Principle (Zahavi) |
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Definition
| sexually selected traits function like conspicuous consumption, signalling the ability to afford to squander a resource simply by squandering it. Receivers know that the signal indicates quality because inferior quality signallers cannot afford to produce such wastefully extravagant signals. |
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Term
| Cryptic Female Choice (3 Parts) |
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Definition
Decide which sperm to use
Investment in egg
Investment in offspring |
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Term
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Definition
| For continued evolution of male trait and female preference, heritable variation in offspring viability must be present |
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