Instructions

Key deer are the smallest subspecies of the Virginia white-tailed deer (Odocoileus virginianus ssp. clavium), and are federally listed as endangered since their population numbers are low and the subspecies remain under threat of extinction from human activities. The National Key Deer Refuge has its headquarters on Big Pine Key, but spans 25 islands with a range of habitats including pine rocklands, mangroves, hardwood hammocks, freshwater wetlands, and marine waters. Consider your group. How many females?_5How many males? Envision your group as a population of Key Deer. Females typically have 2 offspring, and reproduce annually. [note-if your group is all one sex, pretend that one of you is of the opposite sek, for the purpose of this exercise) How many offspring would be produced in your population after one season of mating? Calculate the average female fitness (the number of gene copies per female contributed to the next generation). Rafpraduckiur5x2- 10 Calculate the average male fitness rate What sex ratio will be favored by natural selection over the long run? 2. Consider these data from monitoring over a decade: % females % males Total Number Year 55 45% 650 2004 52 48 602 2005 48 52. 816 2006 45 55 744 2007 47 53 580 2008 53 47 876 2009 56 44 774 2010 51 49 680 2011 45 55 902 2012 55 45 814 2013 Graph the proportion of male and female Key deer over this 10-year period. Based on these data, what happens whenever one sex becomes rare or common? 3. Review and define these mating systems: monogamy, polygamy (polygyny and polyandry), promiscuity, monogamy with extra-pair copulation, and mate-guarding. Which might exist in your group’s Key Deer population? 4. For each of the mating systems listed above, find a real-life example of an organism. Describe any sexually dimorphic traits that might exist-list two secondary sexual characteristics in that organism. In those systems, is female choice or male competition more important?

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