Results 41 to 50 of about 3,597 (143)

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

Capture-mark-recapture modelling suggests an Endangered status for the Mayotte Island (eastern Africa) population of Indo-Pacific bottlenose dolphins

open access: yesEndangered Species Research, 2014
We evaluated whether the Indo-Pacific bottlenose dolphins around the fast-developing island of Mayotte are threatened. We used opportunistic photo-identification data and capture-mark-recapture models to estimate key demographic parameters and then ...
C Pusineri   +6 more
doaj   +1 more source

Estimation of Survival Rates from a Jolly-Seber Model with Tag Loss [PDF]

open access: yes, 1984
22 pages, 1 article*Estimation of Survival Rates from a Jolly-Seber Model with Tag Loss* (Kremers, Walter K.) 22 ...
Cornell University. Biometrics Unit.   +3 more
core  

Monitoring African Megafauna in an Anthropogenic Landscape: A 15‐Year Case Study of the Vulnerable West African Giraffe

open access: yesAnimal Conservation, EarlyView.
We used pattern recognition software to correct misidentifications in a 15‐year photographic database of the last, vulnerable West African giraffe population in Niger. After revealing substantial methodological errors that had inflated population estimates by nearly 19%, we corrected individual encounter histories and applied capture‐mark‐recapture ...
Mara Vukelić   +8 more
wiley   +1 more source

Covariantes continuas individuales dependientes del tiempo y el modelo de Cormack–Jolly–Seber [PDF]

open access: yes, 2004
The Cormack–Jolly–Seber model provides the basic framework for analyzing the survival of animals in open populations using capture–recapture data. Extensions of this model have already been developed that allow the survival and capture probabilities to ...
Bonner, S. J., Schwarz, C. J.
core  

The demography of the lizard Tropidurus torquatus (Squamata, Tropiduridae) in a highly seasonal Neotropical savanna [PDF]

open access: yes, 2003
The demography of a population of Tropidurus torquatus was studied from March 1996 until December 1998, in the Cerrado biome of the Central Brazil, using the method of capture and recapture.
Adriana C. S. Pinto   +3 more
core   +2 more sources

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