BIOC54H3 Chapter Notes - Chapter 11: Extra-Pair Copulation, Kentish Plover, Spotless Starling
17 Oct 2011
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Last male fertilizes most eggs , unguarded females remate. Females widely distributed hard to locate: extra pair copulation: socially monogamous might not be genetically monogamous young sired may be raised by others. Females mate with other males other than social partner and use the sperm to fertilize some/all eggs. Males may be taking advantage of this to mate with more females: polygynous males prevent primary mate from other males while inseminating other females - display ornaments. Good genes hypothesis: lower quality partner will provide less benefit than an attractive. Genetic compatibility: increase genetic variety for good match: resources, protection, infanticide reduction direct benefits. Mates tend to clump high epp, widely distributed low epp: reproductive biology. Asynchronous ample time, high epp: humans: higher pheromone exposure = more ovulatory pheromone, low = more follicular pheromone v control, males are more likely to be emancipated from parental care - capitalize on epp. Hotshot hypothesis seems likely in some cases.
