Biology 1001A Lecture 14: Lecture 16 – Sexual Selection
1 Apr 2016
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Meaning of monogamy, polygamy, polygyny, polyandry, promiscuity, lek. Monogamy: a (cid:373)ale a(cid:374)d a fe(cid:373)ale for(cid:373) a pair (cid:271)o(cid:374)d for a (cid:373)ati(cid:374)g seaso(cid:374) or for the i(cid:374)di(cid:448)idual"s reproductive lives. Polygamy: pattern of mating in which an animal has more than one mate of the opposite sex. Polygyny: one male has active pair bonds with many females. Polyandry: one female has active pair bonds with many males. Promiscuity: when males and females both have no pair bonds beyond the time it takes to mate. Leks: congregation of displaying males where females come only to mate. Explain which conditions favour the evolution of monogamous vs. polygynous mating systems. Conditions favouring the evolution of monogamous versus polygynous mating systems. If young require a great deal of care both parents can provide, monogamy prevails. In some birds, both males and females can bring food to the nest.
