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 212
Charles J. Krebs ... . Stratum A , density circa 10 / m2 Stratum B , density circa 5 / m2 Stratum C , density circa 1 / m2 Figure 6.1 The idea of stratification in estimating the size of a plant or animal population . Stratification is ...
Charles J. Krebs ... . Stratum A , density circa 10 / m2 Stratum B , density circa 5 / m2 Stratum C , density circa 1 / m2 Figure 6.1 The idea of stratification in estimating the size of a plant or animal population . Stratification is ...
Page 213
Charles J. Krebs. sample systematically within a stratum . But the usual problems outlined above then mean that it would be difficult to estimate how reliable such sampling is . So it is recommended that you sample randomly within each ...
Charles J. Krebs. sample systematically within a stratum . But the usual problems outlined above then mean that it would be difficult to estimate how reliable such sampling is . So it is recommended that you sample randomly within each ...
Page 217
... stratum A , 3 in stratum B , 6 in stratum C , 2 in stratum D , 7 in E , and 12 in F. Note that you should always constrain this rule so that at least two units are sampled in each stratum . Equation ( 6.23 ) tells us what fraction of ...
... stratum A , 3 in stratum B , 6 in stratum C , 2 in stratum D , 7 in E , and 12 in F. Note that you should always constrain this rule so that at least two units are sampled in each stratum . Equation ( 6.23 ) tells us what fraction of ...
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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