BIO130H1 Lecture Notes - Lecture 6: Fecundity, Predator Satiation, Semelparity And Iteroparity
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Life tables: data summarizing life events that are statistically expected for average individual of a certain age. It includes age of death, time of reproduction and usually only considers females. Lx = probability of being alive at age x. Survivorship curve = graph of lx = probability of being alive at age x vs. age x. Real shape of survivorship curves are more squiggly with more waves. bx = # of daughters born to female of age x during age interval. R0 = l xbx = average expected number of daughters females will have in lifetime. It"s similar to lambda, but in time units of an entire generation, not one time interval. R0 = t = lambda to the power of the generation time. T = generation time = avg. age female gives birth = xl xbx / r0. Generally, organisms with higher lambdas have higher fitness, but all plants aren"t annuals/all lives aren"t short and fast.
