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by: Dani

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# Growth Models WFS 446

Dani
Penn State
GPA 3.3
Population Dynamics
David Miller

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COURSE
Population Dynamics
PROF.
David Miller
TYPE
Class Notes
PAGES
1
WORDS
KARMA
25 ?

## Popular in Wildlife Studies

This 1 page Class Notes was uploaded by Dani on Friday January 23, 2015. The Class Notes belongs to WFS 446 at Pennsylvania State University taught by David Miller in Spring2015. Since its upload, it has received 70 views. For similar materials see Population Dynamics in Wildlife Studies at Pennsylvania State University.

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Date Created: 01/23/15
12115 0 Measuring change in abundance o Arithmetic change y mx b I Absolute change is constant 0 Eg abundance increases by 10 individuals per year I Does not make sense for populations 0 Geometric growth discrete I Rate change is constant 0 Eg 10 increase in population size per year I Abundance measured at discrete intervals 0 Exponential growth continuous I Instantaneous rate of change continuous measurement I New individual immediately contribute to growth 0 Compound interest 0 Basic exponentialgeometric growth model 0 Density dependent I Growth rate is constant I Longterm unrealistic I Shortterm may be a good predictor o Unstructuredexponential I All individuals are the same I Age size and other characters not considered 0 Per capita growth rate I Lambda 1 population stable I Lambda gt 1 population increasing I Lambda lt 1 population decreasing o Geometric growth 0 If population continues to grow for quotTquot years 0 NT No1 A2 A3 AT NT No N I A NTNo1T 0 Exponential growth 0 Instantaneous rate of change given by r I r 0 stable I r gt 0 increasing I r lt 0 decreasing o Shrink interval between observations until it approaches 0 o rN dNdt rate of change in N with respect to change int I depends on r growth rate and N abundance 0 growth period over time period T given by NT NoerT I A er I lnA r

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