Line-transect Distance Sampling
Line-transect distance sampling compared with fixed-width strip-transect counts for assessing tomtit (Petroica macrocephala) population trends
... least, distance sampling provides some robustness against potential changes in bird detectability, such as may occur over ...and line-transect distance sampling as techniques for ...
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Line transect sampling of primates : can animal-to-observer distance methods work?
... perpendicular distance from the transect to the animal first sighted and the mean, maximum and reliable distance from the observer to the ...‘reliable’ distance is (there is not a unique ...
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Line transect sampling of primates : can animal to observer distance methods work?
... Line Transect Sampling of Primates: Can Animal-to-Observer Distance Methods Work? Stephen ...Abstract Line transect sampling is widely used for estimating abundance of ...
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Kernel Estimation in Line Transect Sampling for Parametric Model
... It is reasonable to assume that the detectability function g(y) is nonincreasing function on [0; ∞), that means the detection function have a monotone decreasing curve, the probability of detection should close to one as ...
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Size bias in line transect sampling: A field test
... In Figure 1 the estimated probability of sighting is plotted against perpendicular distance for transect 1 for each group size separatelY'.. 2.2 The Bxponential Power Sighting Function.[r] ...
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Some Improvements in Kernel Estimation Using Line Transect Sampling
... words: Line transect method; kernel density estimation; shoulder condition Introduction Line transect sampling is an important technique to estimate population density D of objects in a ...
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The "Tracked Roaming Transect" and distance sampling methods increase the efficiency of underwater visual censuses
... Roaming Transect (TRT), designed to maximize transect length (and thus the surveyed area) with respect to diving time invested in monitoring, as compared to Conventional Strip Transects ...increasing ...
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Line Transect Methods for Plant Surveys
... standard line transect sampling requires that there are of the order of 20 transect lines or more at each ...to distance from the nearest line for a single realisation of the ...
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An Adaptation of Kernel Density Estimation for Population Abundance using Line Transect Sampling When the Shoulder Condition is Violated
... in line transect ...perpendicular distance x 0 , inclines to be ...perpendicular distance is proposed for the kernel estimator when the shoulder condition is ...
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Design and analysis of line transect surveys for primates
... In the simulation study, we selected the model chosen by AIC, yet despite obvious overfitting in some cases, estimation was still good. Upward bias in line transect sampling can occur from a source ...
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Adaptive distance sampling
... which transect legs are surveyed in a line transect survey must be ...to line transects, and the comments also apply, although to a lesser extent, to point ...adaptive line ...
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Distance sampling in R
... populations. Distance sampling provides a more efficient solution in such ...Conventional distance sampling assumes the observer is located either at a point or moving along a line and ...
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Double-observer line transect methods : levels of independence
... Double-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 ...
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Double observer line transect methods : levels of independence
... Double-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 ...
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The effect of animal movement on line transect estimates of abundance
... Abstract Line transect sampling is a distance sampling method for estimating the abundance of wild animal ...the transect and observer can thus cause substantial ...the ...
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Model based distance sampling
... are line transect sampling, for which the plots are long, narrow strips, and an observer travels along each strip centreline, recording the distance from the line of each animal ...
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Statistical efficiency in distance sampling
... that transect lines are a good representation of the study ...conventional distance sampling (CDS) scenario where there is only one ...recapture distance sam- pling (MRDS) are methods which ...
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Methods for investigating measurement error in cetacean line transect surveys
... itself. Distance-estimation experiments do not require randomized sampling ...perpendicular distance measurements to cetaceans rather than potentially unsuitable proxies such as golf tees (Marques & ...
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A zigzag survey design for continuous transect sampling with guaranteed equal coverage probability
... straight line and curved transects is developed that guarantees equal coverage probability, ...unwanted distance to be traveled from the point where a transect leg leaves the study area to the point ...
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Incorporating animal movement into distance sampling
... Abstract Distance sampling is a popular statistical method to esti- mate the density of wild animal ...Conventional distance sampling represents animals as fixed points in space that are ...
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