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 17
... formula is the " Petersen estimate " of population size and has been widely used because it is intuitively clear . Unfortunately , formula ( 2.1 ) produces a biased estimator of population size , tending to overestimate the actual ...
... formula is the " Petersen estimate " of population size and has been widely used because it is intuitively clear . Unfortunately , formula ( 2.1 ) produces a biased estimator of population size , tending to overestimate the actual ...
Page 20
... formula R + ( 1 −ƒ ) ( R / C ) ( 1 − R / C ) ] C - 1 - + 2C where 1 / 2C = ƒ = Fraction of total population sampled in the second sample ≈ R / M Correction for continuity να Za Standard normal deviate for ( 1 - a ) level of ...
... formula R + ( 1 −ƒ ) ( R / C ) ( 1 − R / C ) ] C - 1 - + 2C where 1 / 2C = ƒ = Fraction of total population sampled in the second sample ≈ R / M Correction for continuity να Za Standard normal deviate for ( 1 - a ) level of ...
Page 41
... formula is clearly just a rearrangement of formula ( 2.21 ) . ( 2.23 ) It is important to keep in mind that these estimates of Ñ ,, ò̟1 , ¡ , and B , are not independent estimates of what is happening in a population , but they are all ...
... formula is clearly just a rearrangement of formula ( 2.21 ) . ( 2.23 ) It is important to keep in mind that these estimates of Ñ ,, ò̟1 , ¡ , and B , are not independent estimates of what is happening in a population , but they are all ...
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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