## 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 214

defer until the next section a discussion of how to decide sample size in each

stratum. Table 6.3 gives sample data for a caribou population. The overall mean

per

): ...

defer until the next section a discussion of how to decide sample size in each

stratum. Table 6.3 gives sample data for a caribou population. The overall mean

per

**sampling unit**for the entire population is estimated as follows (Cochran, 1977): ...

Page 231

Charles J. Krebs. If every primary

elements, subsampling is relatively easy and straightforward (Cochran, 1977,

Chapter 10). But in most ecological situations the primary

unequal ...

Charles J. Krebs. If every primary

**sampling unit**contains the same number ofelements, subsampling is relatively easy and straightforward (Cochran, 1977,

Chapter 10). But in most ecological situations the primary

**sample units**are ofunequal ...

Page 232

6.4.2

calculations of the estimated means and variances are more complex. I will not

attempt to summarize the specific details in this book because they are too

complex ...

6.4.2

**Sampling Units**of Unequal Size If the**sampling units**are of varying size,calculations of the estimated means and variances are more complex. I will not

attempt to summarize the specific details in this book because they are too

complex ...

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Ecological Methodology Charles J. Krebs,CHARLES L. KREBS,Professor of Zoology Charles J Krebs No preview available - 1999 |

### Common terms and phrases

abundance aerial analysis aphids Appendix assumptions bias calculations capture Caughley Chapter clumped coefficient of variation confidence interval confidence limits defined density estimate distance ecological ecologists END-OF-FILE equal catchability equation estimate of population estimate population example Figure finite population FORMAT 2X,'ENTER formula frequency distribution index of dispersion level of precision line transect mark-recapture marked animals Morisita 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 probability problem Program proportion quadrat counts random points random sampling ratio READ regression resource sample size sample sizes sampling unit Seber second sample sequential sampling simple random sampling spatial pattern standard error statistical statistical population stratum study area survival rate Table techniques Total number transformation unmarked variable variance voles