GEV 4517 Lecture Notes - Lecture 9: Peerages In The United Kingdom, Net Reproduction Rate, Adolph Murie
1 Dec 2016
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Science news: not all fish can switch between osmoregulation methods (only euryhaline) Key concepts: population ecology, life tables, demography, population growth, survivorship curves/patterns, age distributions, fertility rates. Collection of individuals from the same species that occupies a specific area (no hard/fast rules: could be flies in an apple or apples in the world) Where and how species disperse: goal is to explain the changes in abundance through space and time: population sizes are not always constant: why do they increase/decrease over time? (populations are a human construct) Intra specific and inter specific interactions dictate distribution and abundance (red v. gray squirrels) (cid:272)ohort is a group of sa(cid:373)e aged i(cid:374)di(cid:448)iduals (cid:862)po(cid:449)erful set of data(cid:863: ex: cohort of 18 year olds. Survivorship curves illustrate the proportion of individuals surviving at each age for a given species or group (log scale so comparable between species and population size: Rates of change, not change of absolute numbers)
