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Article
Change-in-ratio density estimator for feral pigs is less biased than closed mark-recapture estimates
Laura B. Hanson, Auteur ; James B. Grand, Auteur ; Michael S. Mitchell, Auteur ; D. Buck Jolley, Auteur ; Bill D. Sparklin, Auteur ; Stephen S. Ditchkoff, AuteurClosed-population capture-mark-recapture (CMR) methods can produce biased density estimates for species with low or heterogeneous detection probabilities. In an attempt to address such biases, we developed a density-estimation method based on th[...]
Article
Laura B. Hanson, Auteur ; Michael S. Mitchell, Auteur ; James B. Grand, Auteur ; D. Buck Jolley, Auteur ; Bill D. Sparklin, Auteur ; Stephen S. Ditchkoff, AuteurLethal removal is commonly used to reduce the density of invasive-species populations, presuming it reduces population growth rate; the actual effect of lethal removal on the vital rates contributing to population growth, however, is rarely test[...]
Article
Thomas F. Fondell, Auteur ; James B. Grand, Auteur ; David A. Miller, Auteur ; R. Michael Anthony, AuteurThe population of Dusky Canada Geese (Branta canadensis occidentalis) has been in long-term decline, likely due to reduced breeding productivity. To identify causes of mortality, we monitored goslings marked with radio transmitters on the wester[...]
