Results 61 to 70 of about 787 (144)

Rcapture: Loglinear Models for Capture-Recapture in R

Journal of Statistical Software, 2007
This article introduces Rcapture, an R package for capture-recapture experiments. The data for analysis consists of the frequencies of the observable capture histories over the t capture occasions of the experiment. A capture history is a vector of zeros
Sophie Baillargeon, Louis-Paul Rivest
doaj  

Parámetros poblacionales de la rana dorada, Phyllobates terribilis (Myers et al., 1978) (Dendrobatidae), en una localidad de Buenaventura, Valle del Cauca, Colombia

Biota Colombiana, 2018
El objetivo de este estudio fue estimar el tamaño, densidad, probabilidad de supervivencia (φ), de detección (p), y describir las condiciones del hábitat de una población de la rana dorada (Phyllobates terribilis, Dendrobatidae) en bajos del río Naya ...
Stefhania Alzate-Lozano, Rodrigo Lozano-Osorio, Carlos Galvis   +2 more
doaj   +1 more source

A Mark‐Recapture Estimate of the Number of American Eels Arriving at the Lowermost Barrier on the Wolastoq|Saint John River, Canada

River Research and Applications, Volume 42, Issue 1, Page 40-59, January 2026.
ABSTRACT The upstream migration of juvenile American eels (Anguilla rostrata) is frequently obstructed by dams and other in‐stream barriers, leading to habitat loss and fragmentation, factors that are believed to contribute to the species' population decline.
Felix Eissenhauer, Tommi Linnansaari, Thomas C. Pratt, R. Allen Curry, Philip M. Harrison   +4 more
wiley   +1 more source

Annual survival estimation of migratory songbirds confounded by incomplete breeding site-fidelity: study designs that may help [PDF]

Animal Biodiversity and Conservation, 2004
Many species of bird exhibit varying degrees of site–fidelity to the previous year’s territory or breeding area, a phenomenon we refer to as incomplete breeding site–fidelity. If the territory they occupy is located beyond the bounds of the study area or
Marshall, M. R., Diefenbach, D. R., Wood, L. A., Cooper, R. J.   +3 more
doaj  

Demography of Microtus pennsylvanicus in Southern Ontario: enumeration versus Jolly–Seber estimation compared [PDF]

Canadian Journal of Zoology, 1985
A meadow vole population near Toronto went through a cycle in numbers from July 1978 to May 1982. The population never reached a density less than 96 voles/ha or greater than 630 voles/ha. Jolly–Seber estimates differed from total enumeration counts by an average of 10.6% in population size and by less than 0.03 per 2 weeks in survival rates for ...
openaire   +1 more source

Age‐specific survival of reintroduced swift fox in Badlands National Park and surrounding lands

Wildlife Society Bulletin, 2016
In 2003, a reintroduction program was initiated at Badlands National Park (BNP), South Dakota, USA, with swift foxes (Vulpes velox) translocated from Colorado and Wyoming, USA, as part of a restoration effort to recover declining swift fox populations ...
Indrani Sasmal, Robert W. Klaver, Jonathan A. Jenks, Greg M. Schroeder   +3 more
doaj   +1 more source

Incorporating telemetry information into capture‐recapture analyses improves precision and accuracy of abundance estimates given spatiotemporally biased recapture effort

Methods in Ecology and Evolution
Natural populations that are rare, cryptic or inaccessible provide a monumental challenge to monitoring, as adequate data are extremely difficult to collect. Surveys often encompass only a small portion of a population's range due to difficult terrain or
Janelle J. Badger, Devin S. Johnson, Robin W. Baird, Amanda L. Bradford, Michaela A. Kratofil, Sabre D. Mahaffy, Erin M. Oleson   +6 more
doaj   +1 more source

Fin whale survival and abundance in the Gulf of St. Lawrence, Canada

Endangered Species Research, 2014
The fin whale Balaenoptera physalus, the second largest species in the animal kingdom to have lived on Earth, was heavily targeted during the industrial whaling era.
C Ramp, J Delarue, M Bérubé, PS Hammond, R Sears   +4 more
doaj   +1 more source

Abundancia de dos poblaciones de toninas (Tursiops truncatus) en el norte de Veracruz, México Abundance of two populations of bottlenose dolphins (Tursiops truncatus) in northern Veracruz, Mexico

Revista Mexicana de Biodiversidad, 2011
En México no se conoce el tamaño de las poblaciones de la tonina (Tursiops truncatus) debido a su gran movilidad y al ocasional intercambio de individuos entre poblaciones.
Michelle P. Valdes-Arellanes, Arturo Serrano, Gisela Heckel, Yolanda Schramm, Ibiza Martínez-Serrano   +4 more
doaj  

Genetic and environmental factors associated with survival of a rare songbird in a fragmented urban landscape

Conservation Science and Practice
The coastal Cactus Wren (Campylorhynchus brunneicapillus) persists in small and fragmented populations throughout southern California that are subject to genetic drift and inbreeding.
Amy G. Vandergast, Anna Mitelberg, Barbara E. Kus, Kristine L. Preston, Suellen Lynn, Alexandra Houston, Robert C. Klinger   +6 more
doaj   +1 more source