Results 1 to 10 of about 11,133 (152)

Biodiversity survey and estimation for line-transect sampling [PDF]

Frontiers in Plant Science, 2023
Conducting biodiversity surveys using a fully randomised design can be difficult due to budgetary constraints (e.g., the cost of labour), site accessibility, and other constraints.
Youhua Chen, Ren-Hong Wang, Tsung-Jen Shen   +2 more
doaj   +4 more sources

Abundance estimation for line transect sampling: A comparison of distance sampling and spatial capture-recapture models. [PDF]

PLoS ONE, 2021
Accurate and precise abundance estimation is vital for informed wildlife conservation and management decision-making. Line transect surveys are a common sampling approach for abundance estimation.
Nathan J Crum, Lisa C Neyman, Timothy A Gowan   +2 more
doaj   +2 more sources

Estimating the density of raccoon dogs (Nyctereutes procyonoides) and water deer (Hydropotes inermis) using thermal real-time drone surveys and distance sampling [PDF]

Scientific Reports
Accurate estimation of population density and spatial distribution is essential for wildlife conservation and management, yet conventional survey methods face substantial limitations.
Yeon Woo Lee, Sumin Jeon, Jihye Son, Minyoung Kim, Hyeok Jae Lee, Soo Kyeong Hwang, Ryeoeun Youn, Choonghyun Kang, Jiwon Choi, Tae Ho Lee, Hwanhee Seo, Jong Koo Lee   +11 more
doaj   +2 more sources

Efficient effort allocation in line‐transect distance sampling of high‐density species: When to walk further, measure less‐often and gain precision

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, Michael A. McCarthy, James Camac, Gurutzeta Guillera‐Arroita   +3 more
doaj   +2 more sources

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 ...
Alan Welsh
exaly   +5 more sources

Double Kernel Method Using Line Transect Sampling

Austrian Journal of Statistics, 2016
A double kernel method as an alternative to the classical kernel method is proposed to estimate the population abundance by using line transect sampling.
Omar Eidous, M.K. Shakhatreh
doaj   +3 more sources

A weighted Weibull detection model for line transect sampling: application on wooden stake perpendicular distance data

Cogent Engineering
The line transect survey method is commonly used to estimate the population size. However, recent developments in this field have tended to prefer practical mathematical models for this purpose.
Sana Kanwal, M. H. Tahir, Farrukh Jamal, Muhammad Ameeq, John T. Mendy   +4 more
doaj   +3 more sources

Evaluating differences in density estimation for central Iowa butterflies using two methodologies [PDF]

PeerJ, 2023
The Pollard-Yates transect is a widely used method for sampling butterflies. Data from these traditional transects are analyzed to produce density estimates, which are then used to make inferences about population status or trends.
Shane Patterson, Jonathan Harris, Stephen Dinsmore, Karen Kinkead   +3 more
doaj   +2 more sources

Common opossum population density in an agroforestry system in Bolivia [PDF]

Acta Amazonica, 2020
The common opossum, Didelphis marsupialis thrives near human settlements. Understanding its ecology could help planning management decisions about this species, especially in anthropogenic landscapes.
Camila BENAVIDES, Alejandro ARCE, Luis F. PACHECO   +2 more
doaj   +1 more source

The effect of animal movement on line transect estimates of abundance. [PDF]

PLoS ONE, 2015
Line transect sampling is a distance sampling method for estimating the abundance of wild animal populations. One key assumption of this method is that all animals are detected at their initial location.
Richard Glennie, Stephen T Buckland, Len Thomas   +2 more
doaj   +1 more source