Results 161 to 170 of about 6,368,094 (187)

Window Sensitivity Functions for Line Transect Sampling

Environmental Management, 1998
/ The estimation of animal or plant abundance by the line or belt transect sampling method has been investigated by many authors, including biologists, statisticians, biometricians, wildlife scientists, and fisheries and forestry specialists. The method has reached wide acceptance over the last 30 years, and the theoretical development has continued to
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Using adaptive line-transect sampling in airborne geophysics studies

Communications in Statistics - Simulation and Computation, 2018
We introduce a design that combines elements from distance and adaptive cluster sampling designs.
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On the Accuracy of Line Transect Sampling of Rare Forest Objects

1998
For timber production purposes, plot-based inventory methods, such as circular plot sampling, are widely used. For rare objects, however, other methods are likely to be more cost-efficient and, consequently, studies of alternative methods are needed.
T. Lämås, G. Ståhl
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Adaptive kernel function using line transect sampling

AIP Conference Proceedings, 2018
The estimation of f(0) is crucial in the line transect method which is used for estimating population abundance in wildlife survey’s. The classical kernel estimator of f(0) has a high negative bias. Our study proposes an adaptation in the kernel function which is shown to be more efficient than the usual kernel estimator.
Baker Albadareen, Noriszura Ismail
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A Parametric Generalization of the Hayne Estimator of Line Transect Sampling

Biometrics, 1979
The Hayne model for line transect sampling is generalized by using an elliptic (rather than circular) flushing model for animal detection. By assuming the ratio of major and minor axes lengths is constant for all animals, a model results which allows estimation of population density based directly upon sighting distances and sighting angles.
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Edge effects in line intersect sampling with segmented transects

Journal of Agricultural, Biological, and Environmental Statistics, 2005
Transects consisting of multiple, connected segments with a prescribed configuration are commonly used in ecological applications of line intersect sampling. The transect configuration has implications for the probability with which population elements are selected and for how the selection probabilities can be modified by the boundary of the tract ...
David L. R. Affleck, Timothy G. Gregoire, Harry T. Valentine   +2 more
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Asymptotic Unbiased Kernel Estimator for Line Transect Sampling

Communications in Statistics - Theory and Methods, 2011
In this article, we propose a new estimator for the density of objects using line transect data. The proposed estimator combines the nonparametric kernel estimator with parametric detection function: the exponential or the half normal detection function to estimate the density of objects.
Omar Eidous, M. K. Shakhatreh
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On parametric estimation of population abundance for line transect sampling

Environmental and Ecological Statistics, 2009
Despite recent advances in nonparametric methods for estimating animal abundance, parametric methods are still used widely among biometricians due to their simplicity. In this paper, we propose an optimal shrinkage-type estimator and an empirical Bayes estimator for estimating animal density from line transect sampling data.
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A pliant parametric detection model for line transect data sampling

Communications in Statistics - Theory and Methods, 2022
Christophe Chesneau, Hassan Bakouch
exaly  

Histogram-Based Estimation in Line Transect Sampling

2015
Mousa, Deema, Eidous, Omar Mohammad
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