Ecological MethodologyEcological Methodology, Second Edition provides a balance of material on animal and plant populations, and teaches students of ecology how to design efficient tests in order to obtain maximum precision with minimal work. |
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Page 155
... Change - in - Ratio Methods The idea that population size could be estimated from field data on the change in sex ratio during a hunting season was first noted by Kelker ( 1940 ) . When only one sex is hunted and the sex ratio before ...
... Change - in - Ratio Methods The idea that population size could be estimated from field data on the change in sex ratio during a hunting season was first noted by Kelker ( 1940 ) . When only one sex is hunted and the sex ratio before ...
Page 158
... RATIO ( Appendix 4.4 ) does these calculations for the generalized change - in - ratio estimator of population size . Planning Change - in - Ratio Studies If you propose to use the change - in - ratio estimator ( equation 4.35 ) to ...
... RATIO ( Appendix 4.4 ) does these calculations for the generalized change - in - ratio estimator of population size . Planning Change - in - Ratio Studies If you propose to use the change - in - ratio estimator ( equation 4.35 ) to ...
Page 161
... change - in - ratio experiments . We can illustrate the utility of this graph with an example . Suppose you are planning a change - in - ratio experiment for a deer population and you expect a change in the sex ratio by at least 0.30 ...
... change - in - ratio experiments . We can illustrate the utility of this graph with an example . Suppose you are planning a change - in - ratio experiment for a deer population and you expect a change in the sex ratio by at least 0.30 ...
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abundance aphids Appendix assumptions bias calculations capture Caughley census zone Chapter chi-square clumped coefficient of variation confidence interval confidence limits defined density estimate distance ecological ecologists END-OF-FILE Enter equal catchability equation estimate of population estimate population example Figure finite population FORMAT 2X formula frequency distribution index of dispersion line transect mark-recapture marked animals method n₁ nearest neighbor negative binomial distribution niche breadth niche overlap normal distribution null hypothesis Number of animals Number of individuals number of quadrats number of samples number of species observed obtained parameters Petersen plot Poisson distribution population density population estimate problem Program proportion quadrat counts random points random sampling ratio READ recaptures regression sample size sample sizes sampling unit Schnabel Seber second sample simple random sampling spatial pattern standard error statistical statistical population stratum study area survival rate Table techniques Total number transformation variable variance