BIOS 4730 Lecture Notes - Lecture 2: Florida Scrub Jay, J. B. S. Haldane, Cooperative Breeding
16 Jan 2017
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Document Summary
Behavioral ecology: the study of the evolutionary basis for behaviors due to ecological pressures, ex. Types of social interactions: cooperative both actor and recipient benefit, altruistic: recipient benefits and actor is harmed, selfish: actor benefits and recipient is harmed, spiteful: actor is harmed and recipient is harmed. Hamilton who truly familiarized the concept 1964: you are half related to your siblings and 25% related to your cousins. Evolution of helpers at the nest: helpers at the nest help parents raise more siblings in florida scrub jay, in african starlings, cooperative breeding has evolved more often in savanna habitat than nonsavanna habitat. Why: cooperative breeding in african starlings is associated with species that live in. Coefficients of relatedness between relatives: full siblings 0. 5, half-siblings 0. 25, cousin-cousin 0. 125, parent-offspring 0. 5, uncle/aunt-niece/nephew 0. 25, grandparent-grandchild-0. 25. Altruism in pied kingfishers: nest colonially in tunnels, primary helpers, b(cid:396)i(cid:374)g fish to (cid:373)othe(cid:396)"s (cid:374)estli(cid:374)gs, secondary helpers, bring fish to unrelated nesting pairs.
