BIOL208 Lecture Notes - Cohort Study, Metapopulation, Dall Sheep
12 Mar 2014
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Population structure: sex, age, survival = chapter 11. ***math****very close to the book so use the text. Open populations are harder to estimate than closed populations. Be able to do sex determination, but very difficult in many populations (our data is worse for sex distribution than our population data) Sex ratios: if sexes don"t equally contribute to repro then it is good to know the importance of whichever the limiting gender is, 1:1 is typical for most species, fisher"s theorem frequency dependent selection. Ex: sex type can be genetically or environmental determined. Assume males and females for the next generation is equal (100 to 100). They should all be able to mate, but in one situation males become rare (biased sex ratio and males are limited) some females may not have mating opportunities if there is a monogamy going on. Male (= directional selection because they are the limiting resource). Overtime, abundance of males should increase and females will decrease.
