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Filtering by: Subject Population biology -- Statistical methods

Modeling Density Dependence in the Presence of Measurement Error

Creator:

Payton, Quinn

Abstract:

Density dependence is an ecological concept concerning the mechanisms of change in the size of a population. The inability to census ecological populations confounds approaches to identify and quantify the level of density dependence. Statistical tests which ignore the presence of measurement error tend to result in misspeci fied type...

Resource Type:

Dissertation
Model based estimation of parameters of spatial populations from probability samples

Creator:

Weaver, George W.

Abstract:

Many ecological populations can be interpreted as response surfaces; the spatial patterns of the population vary in response to changes in the spatial patterns of environmental explanatory variables. Collection of a probability sample from the population provides unbiased estimates of the population parameters using design based estimation. When information is...

Resource Type:

Dissertation
Conditioning of unobserved period-specific abundances to improve estimation of dynamic populations

Creator:

Dail, David

Abstract:

Obtaining accurate estimates of animal abundance is made difficult by the fact that most animal species are detected imperfectly. Early attempts at building likelihood models that account for unknown detection probability impose a simplifying assumption unrealistic for many populations, however: no births, deaths, migration or emigration can occur in the...

Resource Type:

Dissertation