Male intrasexual competition

Male-male intrasexual competition occurs when two males of the same species compete for the opportunity to mate with a female. Sexually dimorphic traits, size, sex ratio,^[1] and the social situation^[2] may all play a role in the effects male-male competition has on the reproductive success of a male and the mate choice of a female. Larger males tend to win male-male conflicts due to their sheer strength and ability to ward off other males from taking over their females. For instance, in the fly Dryomyza anilis, size shows the strongest correlation to the outcome of male-male conflicts over resources like territory and females.^[3]

^ Weir, Laura K. (2012-11-22). "Male–male competition and alternative male mating tactics influence female behavior and fertility in Japanese medaka (Oryzias latipes)". Behavioral Ecology and Sociobiology. 67 (2): 193–203. doi:10.1007/s00265-012-1438-9. S2CID 15410498.
^ Proctor, D. S.; Moore, A. J.; Miller, C. W. (2012-03-09). "The form of sexual selection arising from male-male competition depends on the presence of females in the social environment". Journal of Evolutionary Biology. 25 (5): 803–812. doi:10.1111/j.1420-9101.2012.02485.x. PMID 22404372. S2CID 594384.
^ Otronen, Merja (1984-08-01). "Male contesis for territories and females in the fly Dryomyza Anilis". Animal Behaviour. 32 (3): 891–898. doi:10.1016/S0003-3472(84)80167-0. S2CID 53188298.

[Weir_2012-1] Weir, Laura K. (2012-11-22). "Male–male competition and alternative male mating tactics influence female behavior and fertility in Japanese medaka (Oryzias latipes)". Behavioral Ecology and Sociobiology. 67 (2): 193–203. doi:10.1007/s00265-012-1438-9. S2CID 15410498.

[:1-2] Proctor, D. S.; Moore, A. J.; Miller, C. W. (2012-03-09). "The form of sexual selection arising from male-male competition depends on the presence of females in the social environment". Journal of Evolutionary Biology. 25 (5): 803–812. doi:10.1111/j.1420-9101.2012.02485.x. PMID 22404372. S2CID 594384.

[3] Otronen, Merja (1984-08-01). "Male contesis for territories and females in the fly Dryomyza Anilis". Animal Behaviour. 32 (3): 891–898. doi:10.1016/S0003-3472(84)80167-0. S2CID 53188298.

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