Distance sampling
Distance sampling techniques compared for a New Zealand endemic passerine (Philesturnus carunculatus rufusater)
... point-transect distance sampling methods was compared for estimating the density of a conspicuous endemic passerine, the North Island saddleback Philesturnus carunculatus rufusater, in two forest habitats ...
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Invisible trees and meeting management needs: A comparison of distance sampling and traditional forest inventory methods.
... When a boundary truncated the length of any 20 m (65.62 ft) line transect, Didas (2009) accounted for its full length by implementing a boundary slopover correction based on the work of Ducey et al. (2002). In practice, ...
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Distance sampling to determine kaka (Nestor meridionalis septentrionalis) density within Waipapa Ecological Area, Pureora
... We also found that undetected movement of kākā in response to observer presence (the second important assumption of distance sampling) was insignificant. When detected, kākā were usually high above the ...
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Mixture models for distance sampling detection functions
... in distance sampling, provided that detection at zero distance is certain, heterogeneity is not extreme and a flexible detection function model is used ([2], Sec- tion ...of distance (for ...
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Distance sampling to estimate densities of four native forest bird species during multi-species surveys
... limited sample size, data collected for bellbird and tūī at the Kauaeranga site, and kererū at the Tapu site (Table 1), were analysed using Conventional Distance Sampling (CDS) with a global detection ...
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Distance software: design and analysis of distance sampling surveys for estimating population size
... transect sampling, where all animals within the strip of half-width w are assumed to be detected, estimation of abundance within the survey region can be achieved using an entirely design-based ...Standard ...
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Use of distance sampling to measure long-term changes in bird densities in a fenced wildlife sanctuary
... Sample sizes affect the precision of estimates and potentially the degree of bias. Although small sample sizes for tomtit, silvereye and grey warbler resulted in highly uncertain density estimates in some years, the data ...
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Density estimation of sound producing terrestrial animals using single automatic acoustic recorders and distance sampling
... Distance sampling is a widely used methodology for the estimation of animal population size (Buckland 2006, Camp et ...with distance from an observer, functions that describe the probability of ...
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Point and interval estimates of abundance using multiple covariate distance sampling: an example using great bustards
... Description of computations to produce sex-specific estimates of density from a multiple-covariate distance sampling analysis. Program Distance 5.0 has limited capacity to bootstrap certain types of ...
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Models of random wildlife movement with an application to distance sampling
... The models presented in this paper are by no means exhaustive. There remains an enormous scope for the study of both random and responsive wildlife move- ment, and their implications for distance sampling. ...
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A unifying model for capture recapture and distance sampling surveys of wildlife populations
... and distance sampling (DS), each with its own largely separate ...mark-recapture distance sampling (MRDS) models, in which animal locations are observed without ...
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Estimation bias under model selection for distance sampling detection functions
... about what detectability might look like and which assumptions are likely to be violated is fundamental to guide the modelling exercise. The ultimate goal is to put in place survey methods leading to data such that ...
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ESTIMATING MOOSE ABUNDANCE IN LINEAR SUBARCTIC HABITATS IN LOW SNOW CONDITIONS WITH DISTANCE SAMPLING AND A KERNEL ESTIMATOR
... We determined that a viable survey method was line-transect distance sampling (Burnham et al. 1985, Buckland et al. 2001) using a helicopter for several reasons: 1) the area tends to have marginal snow ...
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Incorporating measurement error and density gradients in distance sampling surveys
... Distance sampling is one among several other possible alternatives, such as plot sampling, mark-recapture studies or removal, catch-effort and change-in-ratio ap- proaches ...animals, distance ...
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Distance sampling detection functions : 2D or not 2D?
... mark-recapture distance sampling (MRDS) methods (see Burt et ...perpendicular distance data have a mode at, or very close to distance zero (Figure ...
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Model based distance sampling
... In this paper, we only superficially address full spatial models for distance sampling. Key papers in this area are Högmander (1991), Hedley and Buckland (2004) and Johnson et al. (2010). Miller et al. ...
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Adaptive distance sampling
... its distance from the point and so observations are pooled across all points, initial and adaptive, to produce an estimate of ...in distance sampling (Borchers 1996; Borchers et al, 1998a; Buckland ...
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Line-transect distance sampling compared with fixed-width strip-transect counts for assessing tomtit (Petroica macrocephala) population trends
... 2002), distance sampling (Westbrooke et ...or distance sampling for monitoring short-term population trends of ...fixed distance of transect lines, and the results are expressed as a ...
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Distance sampling in R
... Distance sampling has been applied in a wide variety of ...of distance sampling ...using distance sampling. Songs and blows are indirect sampling methods producing ...
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Point process models for spatio temporal distance sampling data from a large scale survey of blue whales
... adequate sampling units (strips for line transect surveys and circular plots for point transect surveys) in each area for which animal density or abundance is to be ...conventional distance sampling ...
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