3bEstimatingPopulationSize

3bestimatingpopulationsize

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Unformatted text preview: Exercise 3B Estimating Population Size: Mark-Recapture Parts of this lab adapted from General Ecology Labs, Dr. Chris Brown, Tennessee Technological University and Ecology on Campus, Dr. Robert Kingsolver, Bellarmine University. Introduction One of the goals of population ecologists is to explain patterns of species distribution and abundance. In today’s lab we will learn some methods for estimating population size and for determining the distribution of organisms. Measuring Abundance: Mark-Recapture Mobile animals are usually simpler to define as individuals, but harder to count, because they tend to move around, mix together, and hide from ecologists. Quadrats are not a good approach with mobile animals because immigration and emigration in and out of the study site make it hard to know what area the entire population occupies. For largemouth bass in a farm pond, you could easily draw a line around a map of the population, but how would you define the edges of a population of house sparrows in your community? Although house sparrows tend to be more concentrated in towns and urban areas, they do not stop and turn back at the city limit sign....
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This note was uploaded on 09/02/2011 for the course BIOL 6C taught by Professor Sundram during the Spring '09 term at DeAnza College.

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