Results 21 to 30 of about 3,232,780 (292)

Estimating bee abundance: can mark-recapture methods validate common sampling protocols?

open access: yesApidologie, 2022
Wild bees can be essential pollinators in natural, agricultural, and urban systems, but populations of some species have declined. Efforts to assess the status of wild bees are hindered by uncertainty in common sampling methods, such as pan traps and ...
E. Briggs   +5 more
semanticscholar   +1 more source

Chew-cards can accurately index invasive rat densities in Mariana Island forests [PDF]

open access: yesNeoBiota, 2022
Rats (Rattus spp.) are likely established on 80–90% of the world’s islands and represent one of the most damaging and expensive biological invaders. Effective rat control tools exist but require accurate population density estimates or indices to inform ...
Emma B. Hanslowe   +6 more
doaj   +3 more sources

Estimation fish stock and composition using mark recapture studies in floodplain lake, Jambi City

open access: yesDepik Jurnal, 2023
Fish stock assessment can be estimated by dependent and independent sampling; Mark-recapture studies is a part of independent sampling method that can be used for it. This study was conducted in 2018 using purposive sampling methods.
Siswanta Kaban   +2 more
doaj   +1 more source

Integrating telemetry data at several scales with spatial capture–recapture to improve density estimates

open access: yesEcosphere, 2021
Accurate population estimates are essential for monitoring and managing wildlife populations. Mark–recapture sampling methods have regularly been used to estimate population parameters for rare and cryptic species, including the federally listed Mojave ...
Corey I. Mitchell   +7 more
doaj   +1 more source

Mark‐Recapture with Multiple, Non‐Invasive Marks [PDF]

open access: yesBiometrics, 2013
AbstractSummaryNon‐invasive marks, including pigmentation patterns, acquired scars, and genetic markers, are often used to identify individuals in mark‐recapture experiments. If animals in a population can be identified from multiple, non‐invasive marks then some individuals may be counted twice in the observed data.
Bonner, Simon J., Holmberg, Jason
openaire   +4 more sources

Recapture heterogeneity in cliff swallows: increased exposure to mist nets leads to net avoidance. [PDF]

open access: yesPLoS ONE, 2013
Ecologists often use mark-recapture to estimate demographic variables such as abundance, growth rate, or survival for samples of wild animal populations.
Erin A Roche   +3 more
doaj   +1 more source

Survival rates of adult and juvenile gyrfalcons in Iceland: estimates and drivers [PDF]

open access: yesPeerJ, 2021
Knowledge of survival rates and their potential covariation with environmental drivers, for both adults and juveniles, is paramount to forecast the population dynamics of long-lived animals.
Frédéric Barraquand   +1 more
doaj   +2 more sources

Abundance estimation from genetic mark-recapture data when not all sites are sampled: an example with the bowhead whale

open access: yesbioRxiv, 2019
Estimating abundance is one of the most fundamental and important aspects of population biology, with major implications on how the status of a population is perceived and thus on conservation and management efforts.
Timothy R. Frasier   +5 more
semanticscholar   +1 more source

Rejection of Schmidt et al.'s estimators for bear population size

open access: yesEcology and Evolution, 2019
Aerial distance sampling of bears to estimate population size has been used throughout many parts of Alaska. The distance sampling models are complex since they need to account for undetected bears and differences in detection probabilities.
Earl Becker, Aaron Christ
doaj   +1 more source

Abundance of bottlenose dolphins, Tursiops truncatus (Cetacea: Delphinidae), inhabiting the Patos Lagoon estuary, southern Brazil: implications for conservation

open access: yesZoologia (Curitiba), 2011
A new mark-recapture abundance estimate and a photographic census were carried out to investigate the possible decline in the abundance of the bottlenose dolphins, Tursiops truncatus (Montagu, 1821), in the Patos Lagoon estuary due to the high levels of ...
Pedro F Fruet   +3 more
doaj   +1 more source

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