Results 41 to 50 of about 6,368,094 (187)
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
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Model-based distance sampling [PDF]
, 2015 CSO was part-funded by EPSRC/NERC Grant EP/1000917/1.Conventional distance sampling adopts a mixed approach, using model-based methods for the detection process, and design-based methods to estimate animal abundance in the study region, given estimated ...
Oedekoven, Cornelia Sabrina +5 more
core +1 more source
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
A model for line transect sampling clustered populations
Statistics & Probability Letters, 1985 A model is presented for the estimation of population density using line- transect methods on clustered individuals. The model assumes independent sighting of clusters but does not require all individuals in a cluster to be sighted.
520 NSC, University of Florida, Gainesville, FL 32611, USA ( host institution ) +2 more
openaire +2 more sources
Non-uniform coverage estimators for distance sampling. [PDF]
, 2009 Previously in the University eprints HAIRST pilot service at http://eprints.st-andrews.ac.uk/archive/00000445/Allocation of sampling effort in the context of distance sampling is considered.
Rexstad, Eric
core +2 more sources
Estimating gopher tortoise density using a spatial distance sampling model
Global Ecology and ConservationThe gopher tortoise (Gopherus polyphemus) is an ecologically important species of conservation concern in the southeastern United States, and accurate estimates of density are crucial for monitoring population status and evaluating recovery progress ...
Craig D. Marshall +3 more
doaj +1 more source
Global coverage of cetacean line-transect surveys : status quo, data gaps and future challenges [PDF]
, 2012 Knowledge of abundance, trends and distribution of cetacean populations is needed to inform marine conservation efforts, ecosystem models and spatial planning.
Catriona M Harris +21 more
core +2 more sources
Guidelines for Line Transect Sampling of Biological Populations
The Journal of Wildlife Management, 1979 Practical field procedures for conducting line transect surveys to estimate the size or density of biological populations are presented and discussed. Assumptions required for valid line transect surveys are specified. We emphasize that it is crucial to conduct observations along straight transects and obtain accurate measurements of distances and ...
David R. Anderson +3 more
openaire +2 more sources
Frontiers in Marine Science, 2018 Environmental variability affects distributions of marine predators in time and space. With expected changes in the ocean climate, understanding the relationship between species distributions and the environment is essential for developing successful ...
Tomoharu Eguchi +6 more
doaj +1 more source
Frontiers in Marine Science, 2020 Knowledge of a population’s abundance is of primary importance for conservation management. However, robust estimates of abundance are often difficult to obtain, especially for cetaceans which spend most of their lives submerged.
Morgan Jennifer Martin +6 more
doaj +1 more source