Results 21 to 30 of about 787 (144)

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

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 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

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

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

Estimation of Population Growth Rate using Jolly-Seber Method and Robust Design [PDF]

open access: yesCommunications for Statistical Applications and Methods, 2003
Mark-Recapture method for open population commonly use Jolly-Seber method. This method assumes that all animals are equally likely to be caught in each sample (the equal catchability). This objects are making introduction of Mark-Recapture method for open population and using the robust design that combine a open population method with close population
Jihye Kim   +3 more
openaire   +1 more source

Apparent survival probability and abundance of juvenile green turtles in the foraging ground at Kuroshima Island, Ryukyu Archipelago

open access: yesEndangered Species Research, 2023
An understanding of the survival probability and abundance of endangered species is critical for their effective conservation and management. In this study, long-term capture-mark-recapture data were used to estimate the apparent survival probability and
K Kameda   +4 more
doaj   +1 more source

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