Results 11 to 20 of about 117,053 (296)
Line Transect Sampling in Small Regions
Biometrics, 2001 This article develops an approach to estimating population abundance from line transect surveys that uses a calibration survey to estimate the detection function, which is then employed as a weight function in constructing the abundance estimate. Nonparametric methods of estimating the detection function via local regression and via a kernel density ...
Melville, G, Welsh, Alan
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Methods in Ecology and Evolution, 2021 Line‐transect distance sampling is widely used to estimate population densities using distances of observed targets from transect lines to model detectability. When the target taxa are high density, the frequent measuring of distances may make the method
Kathryn Knights +3 more
doaj +2 more sources
Double‐Observer Line Transect Methods: Levels of Independence
Biometrics, 2010 SummaryDouble‐observer line transect methods are becoming increasingly widespread, especially for the estimation of marine mammal abundance from aerial and shipboard surveys when detection of animals on the line is uncertain. The resulting data supplement conventional distance sampling data with two‐sample mark–recapture data.
Buckland, Stephen T. +2 more
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Diversity of Forest and Shrub Communities as a Result of Site History and of Extensive and Intensive Forest Management (Glinno Ługi Case Study) [PDF]
, 2011 The paper presents the diversity of natural and anthropogenic forest communities occurring in post-cultivated fields in Glinno Ługi. An impoverished fresh pine forest association (Leucobryo-Pinetum) and nine secondary forest communities have been ...
Ambrożkiewicz, Katarzyna +1 more
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An Assessment Of The Accuracy Of Kangaroo Surveys Using Fixed-Wing Aircraft [PDF]
, 1998 The use of line-transect methodology, on foot or from a helicopter, is likely to return the most repeatable, least biased estimates of kangaroo density. However, the associated costs make both methods impractical for broad-scale surveys.
Beard, LA +5 more
core +1 more source
Hyper abundant mesopredators and bird extinction in an Atlantic forest island
Zoologia (Curitiba), 2009 Islands can serve as model systems for understanding how biological invasions affect native species. Here we examine the negative effects of mesopredator mammals on bird richness at Anchieta Island, an 826 ha offshore island in the coast of Brazil ...
Mauro Galetti +7 more
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Ecologies, 2023 Agricultural expansion has had a detrimental effect on tropical forests and the animal communities that depend on them. Agroforestry systems, however, with their more complex tree and plant communities, have been shown to be important habitats for a ...
Hassan Al-Razi +5 more
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Mark-recapture estimators for dual frame population size of prominent nesting structures: the effect of uncertain detection probability [PDF]
, 2005 The combined mark-recapture and line transect sampling methodology proposed by Alpizar- Jara and Pollock [Journal of Environmental and Ecological Statistics, 3(4), 311–327, 1996; In Marine Mammal Survey and Assessment Methods Symposium. G.W. Garner, S.C.
Alpizar-Jara, R. +2 more
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Jurnal Kelautan Tropis, 2018 Echinoderms are fundamentally good indicators of health and status of coralline communities in marine waters. Substrat of sandy, rububle and coral reefs are good habitat for Asteroidea dan Echinoidea.
Retno Hartati +4 more
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Animal Biodiversity and Conservation, 2020 Assemblages of medium and large–sized mammals were studied in the Guyana shield of the Brazilian Amazonia. Diurnal and nocturnal line–transect samplings were carried out via the line–transect method in five different forest types along a 10–km transect ...
A. R. Mendes Pontes +3 more
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