BIOL10001 Lecture 21: BIOL10001 Lecture 21 Notes
20 Sep 2018
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Document Summary
Dna studies allow origin and evolution to be unravelled. Strong association between mating system and level of parental care. Pair bond lasts for between one season and a lifetime (varies in di erent species) Single chick takes up to 280 days to reach independence. Parents take turns to undertake long foraging trips. High demands of chick rearing favours evolution of monogamy. Males show a variety of adaptations for extra- pair" mating. Males often exhibit courtship and have elaborate colouration compared to females or males build structures + exhibit courtship e. g. ri ebirds or males build structures + exhibit courtship e. g. ri ebirds e. g. bower birds. Males build avenue bowers" and decorate them with blue objects. Females decide whether or not to mate after judging bower - Female builds nest & raises young alone - polygyny. Southern cassowary female lays for up to 3 males male incubates 2 months extended male care: 9 months.
