F13 lecture 22

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Unformatted text preview: evolved gene8c correla8ons and are expected to respond together to selec8on due to predators. why compute selec8on gradients? •  selec8on gradients help to determine the traits under direct selec8on –  but cannot prove what trait is under direct selec8on –  selec8on gradients are observa8onal (cannot account for all traits) •  need manipula8ve experiments to directly demonstrate selec8on on a specific trait(s) –  because most or all other traits can be controlled for –  but experimental analysis has limits as well Classic experiment by Malte Andersson...
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