ENVIRSCI 214 Lecture 8: EnvSci 214 2:8
14 Feb 2017
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Sexual selection- male competition and female choice- honest signals. Differential reproductive success due to variation among individual in ability to obtain mates. Fitness leads to survival, offspring per mating and number of mating (sexual selections) Deep roar, intensity of call, body size, weapons, may be indicators of competitor level. Color, song, ornament, movement may be preferred by female and may be accurate indicators of mate quality or a(cid:374) (cid:858)ho(cid:374)est sig(cid:374)al(cid:859) caretonoids- class of pigments, produced by plants, algae, photosynthetic bacteria; acquired by animals in their diet. Food deprivation can decrease color tone in animals. Fe(cid:373)ale (cid:271)irds produ(cid:272)ed s(cid:373)aller se(cid:272)o(cid:374)d eggs (cid:449)he(cid:374) the(cid:455) sa(cid:449) (cid:373)ate(cid:859)s feet (cid:449)ere dull/not bright blue (they put less energy into a lamer bird) this bird was called a blue-footed boobie. Satellite males- wait near other calling males and grab females that are attracted to the call (cid:894)the(cid:455) are esse(cid:374)tiall(cid:455) (cid:862)(cid:272)herr(cid:455) pi(cid:272)kers(cid:863)(cid:895) Larvae of dung beetles with a surplus of dung will have longer horns.
