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 53
... recaptures per bird = Total recaptures / Total birds Σ 8 } = 72 + 72 + 62 + 42 + 72 = 199 . - = 31/32 = 0.9687 . Leslie suggests that at least G = 20 animals are needed to make this a satisfactory test . If the number of degrees of ...
... recaptures per bird = Total recaptures / Total birds Σ 8 } = 72 + 72 + 62 + 42 + 72 = 199 . - = 31/32 = 0.9687 . Leslie suggests that at least G = 20 animals are needed to make this a satisfactory test . If the number of degrees of ...
Page 191
... recaptures ( Σ R1 ) . Thus : 1 CV ( N ) = = 0.277 V13 and thus the 95 % confidence limits would be about twice 0.277 or ± 55 % of the esti- mated population size Ñ . By the end of this experiment on June 15 there were 24 recaptures ...
... recaptures ( Σ R1 ) . Thus : 1 CV ( N ) = = 0.277 V13 and thus the 95 % confidence limits would be about twice 0.277 or ± 55 % of the esti- mated population size Ñ . By the end of this experiment on June 15 there were 24 recaptures ...
Page 257
... recaptures and can be set either from prior infor- mation on the number of recaptures desired or from equation ( 5.13 ) , in which L is fixed once you specify the coefficient of variation you desire in your population estimate ( see Box ...
... recaptures and can be set either from prior infor- mation on the number of recaptures desired or from equation ( 5.13 ) , in which L is fixed once you specify the coefficient of variation you desire in your population estimate ( see Box ...
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Common terms and phrases
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