LIFESCI 3C03 Chapter Notes - Chapter 2: Confounding, Defecation, Phylogenetic Tree
16 Jan 2017
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Document Summary
Breeding behaviour of gulls in relation to predation risk: comparative. Gulls nest on the ground, where offspring are vulnerable to predation. To prevent predation of their young, gulls attack animals that come close to their nest and camouflage their nesting area (removal of white egg shells that attract attention, avoidance of defecation in area, etc. ) Hypothesis: attacking and camouflaging behaviours in gulls have evolved in response to predation. Observations: in the kittiwake species in which the location of nests make it considerably difficult for predators to each eggs and chicks, attacking and camouflage behaviours are rare. Conclusions: gull attacking and camouflage act as anti-predator behaviours. Background information: different species of weaver birds have different social organizations (e. g. solitary versus flocks, monogamous versus polygamous) Method: e(cid:454)a(cid:373)i(cid:374)e (cid:272)orrelatio(cid:374)s (cid:271)etwee(cid:374) so(cid:272)ial orga(cid:374)izatio(cid:374) a(cid:374)d spe(cid:272)ies" e(cid:272)olog(cid:455) (t(cid:455)pe of food, food distribution and abundance, predators, and nest sites) Results: weaver birds fall into two distinct categories depending on predation and food dispersion.
