Results 31 to 40 of about 83,949 (294)
Trees, Forests and People, 2022 Reptile populations are relevant components of biodiversity in both temperate and tropical forests. However, in forest habitats reptiles are secretive and the complex structure of the environment makes it difficult to assess with confidence their ...
Giacomo Rosa +3 more
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Density estimation for grouped data with application to line transect sampling
, 2010 Line transect sampling is a method used to estimate wildlife populations, with the resulting data often grouped in intervals. Estimating the density from grouped data can be challenging.
Jang, Woncheol, Loh, Ji Meng
core +1 more source
KERNEL FEATURE CROSS-CORRELATION FOR UNSUPERVISED QUANTIFICATION OF DAMAGE FROM WINDTHROW IN FORESTS [PDF]
, 2016 In this study estimation of tree damage from a windthrow event using feature detection on RGB high resolution imagery is assessed. An accurate quantitative assessment of the damage in terms of volume is important and can be done by ground sampling, which
D. Travaglini +6 more
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Density estimation based on line transect samples
Statistics & Probability Letters, 1984 This article considers the estimation of the density of objects distributed on a region of the plane when the sampling method is the line transect. In this sampling method a line segment or transect is placed within the region. An observer traverses the transect, counts the number N of objects detected and for each detected object its perpendicular ...
520 NSC, University of Florida, Gainesville, FL 32611, USA ( host institution ) +1 more
openaire +2 more sources
Some considerations on aggregate sample supports for soil inventory and monitoring [PDF]
, 2012 Soil monitoring and inventory require a sampling strategy. One component of this strategy is the support of the basic soil observation: the size and shape of the volume of material that is collected and then analysed to return a single soil datum.
Arrouays +20 more
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Quantifying Wildlife Abundance: Negative Rayleigh Modeling of Line Transect Data
MathematicsThis study introduces a negative Rayleigh detection model for estimating population abundance in line transect surveys. The model satisfies key detection conditions and provides a detailed analysis of its probability density function, moments, and other ...
Abdullah M. Almarashi
doaj +1 more source
Wildlife Society Bulletin, 2015 Line‐transect distance sampling (LTDS) is increasingly used to estimate gopher tortoise (Gopherus polyphemus) densities. The process requires detecting tortoise burrows, and then determining occupancy.
Traci D. Castellón +2 more
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Would You Like a Sample? [PDF]
In this lesson students will investigate sampling strategies for biological communities in the ocean to see how well biological samples represent the actual communities from which they are taken.
core +1 more source
Abundance Estimation Using Minimum Order Set Distances in Line Transect Sampling
StatsLine transect sampling is widely used for estimating population abundance, but existing nonparametric estimators of detection density at the transect line often suffer from boundary bias and tuning sensitivity. In this paper, we propose two simple tuning-
Mohammad Ali Al Kadiri +1 more
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Journal of Threatened Taxa, 2016 To determine population status of wild animal using reliable sampling techniques forms an important component of conservation effort and effective wildlife management.
Himanshu S. Palei +2 more
doaj +1 more source