BIOLOGY 3SS3 Lecture Notes - Lecture 3: Life Table, Fecundity
12 Apr 2017
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If we think age/size is important to understanding a population. Keep track of how many individuals of each group (age, size or developmental stage: before we were tracking populations with a single state variable (population size/density) and assuming all individuals were the same. Census time: before reproduction: all individuals are adults, after reproduction: all individuals are seeds. Always close the loop (adults adults or seeds seeds) What does r tell us about : population increases when r >1 ; r > > 1. Stage-structured models more flexible than an age-structured model. Discrete vs. continuous time: continuous time models are structurally simpler and smoother: populations with continuous reproduction may be better suited for continuous, populations with synchronous reproduction may be better suited for discrete. When to count: before reproduction: fewest number of individuals, after reproduction: most information about the population processes, some other time: convenience of counting (individuals gather together or easy to find)
