BIOLOGY 3SS3 Study Guide - Midterm Guide: Senescence, Semelparity And Iteroparity, Brie
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Humans senesce (declining fecundity); oak trees, cod, and tilapia have indeterminate growth, so their fecundity keeps increasing with age. Suppose further that the population is declining with = 0. 25. I didn"t have the right answer in the available choices here previously sorry! You need to use the sad formula (cid:96)x x here. The information about f is unnecessary, you only need p (from which you can calculate (cid:96)) and . If px = 0. 5 every year, then (cid:96)1 = 1 (as always); (cid:96)2 = 0. 5; (cid:96)3 = 0. 25. So the ratio of age-3 individuals to age-1 indi- viduals is ((cid:96)3 3)/((cid:96)1 1) = (0. 25 0. 25 3)/(1 0. 25 1) = (0. 25 64)/(4) = 16/4 = 4. (if youwantawaytothinkaboutthisratherthanjustpluggingstuf f intothef ormula, youcansaythat(1)only1/4of theoriginalcohortwillsurvivetoage3, but(2)becausethepopulationisdroppingby1/4eachyear, andtheage . 1 o spring in even years, which of the following is closest to its long-term average growth rate: 1, 3, 3. 2, 5. 5, 10. This is the geometric mean of 10 and 1 =
