Results 21 to 30 of about 824 (154)

Characteristics and Demography of a Free-Ranging Ethiopian Hedgehog, Paraechinus aethiopicus, Population in Qatar

open access: yesAnimals, 2020
Information on population characteristics of Paraechinusis is valuable for ensuring long term survival of populations, however, studies are currently lacking.
Carly Pettett   +4 more
doaj   +1 more source

The Jolly-Seber-Tag-Loss model with group heterogeneity [PDF]

open access: yesThe Arbutus Review, 1969
Mark-recapture experiments are performed to estimate population parameters such as survival probabilities. Animals are captured, tagged, released, and recaptured at subsequent time periods in order to obtain parameter information. The Jolly-Seber-Tag-Loss (JSTL) model (Cowen & Schwarz, 2006) requires some individuals to be double tagged in order to
Selina Beatriz Gonzalez, Dr. Laura Cowen
openaire   +1 more source

Climate Change and the Spatiotemporal Variation in Survival of a Long-Distance Migrant (White Stork, Ciconia ciconia) across Western Europe

open access: yesBirds, 2021
The spatial variation in the strength of climate change may lead to different impacts on migratory birds using different breeding areas across a region.
Beatriz Martín   +2 more
doaj   +1 more source

The fishing and natural mortality of large, piscivorous Bull Trout and Rainbow Trout in Kootenay Lake, British Columbia (2008–2013) [PDF]

open access: yesPeerJ, 2017
Background Estimates of fishing and natural mortality are important for understanding, and ultimately managing, commercial and recreational fisheries.
Joseph L. Thorley, Greg F. Andrusak
doaj   +2 more sources

Subterranean systems provide a suitable overwintering habitat for Salamandra salamandra

open access: yesInternational Journal of Speleology, 2017
The fire salamander (Salamandra salamandra) has been repeatedly noted to occur in natural and artificial subterranean systems. Despite the obvious connection of this species with underground shelters, their level of dependence and importance to the ...
Monika Balogová   +3 more
doaj   +1 more source

Estudio crítico del modelo de Manly-Parr

open access: yesRevista de Matemática: Teoría y Aplicaciones, 2009
Manly and Parr in 1968 obtain a model which give an estimation of the parameters of an animal population. The model presents some weakness on the specifications of the class of individual in the population.
Jorge Poltronieri Vargas
doaj   +1 more source

VARIACIÓN DEMOGRÁFICA TEMPORAL DE LA TORTUGA DE RÍO CHOCOANA, Rhinoclemmys nasuta (GEOEMYDIDAE), EN ISLA PALMA, BAHÍA MÁLAGA, PACÍFICO DEL VALLE DEL CAUCA

open access: yesActa Biológica Colombiana, 2014
Pocos estudios demográficos de larga duración han sido realizados en tortugas dulceacuícolas de Suramérica, pese a la necesidad de este tipo de investigación para esclarecer las variaciones naturales y fortalecer procesos de conservación en este grupo ...
Mario Fernando Gárces Restrepo   +2 more
doaj   +1 more source

Study on the population structure of the paradoxical frog, Pseudis bolbodactyla (Amphibia: Anura: Hylidae), using natural markings for individual identification

open access: yesZoologia (Curitiba), 2013
The goal of this study was to assess the population structure of Pseudis bolbodactyla Lutz, 1925 using natural markings to identify individuals. Recruitment, survival, and population size estimations were obtained using the Jolly-Seber stochastic method.
Werther P. Ramalho   +4 more
doaj   +1 more source

The Influence of Mark-Recapture Sampling Effort on Estimates of Rock Lobster Survival. [PDF]

open access: yesPLoS ONE, 2016
Five annual capture-mark-recapture surveys on Jasus edwardsii were used to evaluate the effect of sample size and fishing effort on the precision of estimated survival probability. Datasets of different numbers of individual lobsters (ranging from 200 to
Ziya Kordjazi   +4 more
doaj   +1 more source

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

open access: yesBiota 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   +2 more
doaj   +5 more sources

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