Results 41 to 50 of about 3,647 (182)

Demography and Population Dynamics of the Lacertid Lizard Podarcis Bocagei in North-West Spain [PDF]

open access: yes, 1999
[Abstract] The demography and life-history traits of a population of the lacertid lizard Podarcis bocagei in north-west Spain were investigated. Most of the conclusions presented are based on mark-recapture studies carried out over a 2-year period ...
Galán, Pedro
core   +2 more sources

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

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

When is a parasite not a parasite? Effects of larval tick burdens on white-footed mouse survival [PDF]

open access: yes, 2014
Many animal species can carry considerable burdens of ectoparasites: parasites living on the outside of a host's body. Ectoparasite infestation can decrease host survival, but the magnitude and even direction of survival effects can vary depending on the
Hersh, Michelle H.   +3 more
core   +1 more source

Evaluating trends in abundance of immature green turtles, Chelonia mydas, in the Greater Caribbean [PDF]

open access: yes, 2005
Many long-lived marine species exhibit life history traits. that make them more vulnerable to overexploitation. Accurate population trend analysis is essential for development and assessment of management plans for these species. However, because many of
Bjorndal, Karen A.   +2 more
core   +1 more source

Complete tag loss in capture–recapture studies affects abundance estimates: An elephant seal case study

open access: yesEcology and Evolution, 2020
In capture–recapture studies, recycled individuals occur when individuals lose all of their tags and are recaptured as though they were new individuals. Typically, the effect of these recycled individuals is assumed negligible. Through a simulation‐based
Emily Malcolm‐White   +2 more
doaj   +1 more source

Taking individual heterogeneity in mortality risks into account in demographic studies of wild animal populations: development and use of statistical models. [PDF]

open access: yes, 2007
The Cormarck-Jolly-Seber model incorporating frailty implemented in WinBUGS, using the 9000 kittiwake’s dataset monitorized during 22 years, showed that the convergence is very low over computational view. We developed different kind of multistate model,
Alpizar-Jara, R.   +2 more
core  

Seasonal body mass dynamics mediate life‐history trade‐offs in a hibernating mammal

open access: yesJournal of Animal Ecology, EarlyView.
We tested a suite of ecological hypotheses to explain variation in seasonal body mass dynamics of a fat‐storing mammalian hibernator. We further demonstrated that pre‐hibernation mass gain in ground squirrels mediates an annual allocation trade‐off between current and future reproduction as the squirrels forage and rear young under predation risk ...
Austin Z. T. Allison   +4 more
wiley   +1 more source

Reproduction, growth rate and dispersal of the dark chub, Candidia sieboldii, as estimated by using the mark–release–recapture method

open access: yesJournal of Freshwater Ecology, 2017
We investigated the breeding season, growth rate and dispersal of the dark chub, Candidia sieboldii, an endangered species in Japan. A mark–release–recapture survey was performed in three branches of the Ishizu River system in Osaka Prefecture, Japan ...
Haruka Matsuoka   +2 more
doaj   +1 more source

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