Results 91 to 100 of about 17,512,468 (321)

Sunda scops-owl density estimation via distance sampling and call playback

open access: yes, 2018
Nocturnal birds in the tropics remain little studied primarily due to the logistical difficulties of surveying these birds at night. While call playback has been widely employed in the temperate regions, its practicality has not been adequately ...
Pilla Phillcaine   +4 more
semanticscholar   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

Detecting spatial aggregation from distance sampling: a probability distribution model of nearest neighbor distance

open access: yes, 2013
Spatial point pattern is an important tool for describing the spatial distribution of species in ecology. Negative binomial distribution (NBD) is widely used to model spatial aggregation.
Meng Gao, Gao, Meng
core   +1 more source

Correcting Waterhole-Driven Population Biases in Arid Ecosystems: A Case Study of Oryx (Oryx gazella)

open access: yesDiversity
Transect surveys and distance sampling are widely used to estimate wildlife population densities, but these methods can be biased when animals aggregate near features such as waterholes or other resources that occur along survey routes.
Erika P. Swenson   +3 more
doaj   +1 more source

Estimating Key Largo woodrat abundance using spatially explicit capture–recapture and trapping point transects

open access: yesWildlife Society Bulletin, 2016
The Key Largo woodrat (Neotoma floridana smalli) is an endangered rodent with a restricted geographic range and small population size. Establishing an efficient monitoring program of its abundance has been problematic; previous trapping designs have not ...
Joanne M. Potts   +3 more
doaj   +1 more source

Community distance sampling models allowing for imperfect detection and temporary emigration

open access: yes, 2017
. Recent developments of community abundance models (CAMs) enable us to analyze communities subject to imperfect detection. However, existing CAMs assume spatial closure, that is, that individuals are always present in the sampling plots, which is often ...
Y. Yamaura, J. Andrew Royle
semanticscholar   +1 more source

An Active Tutorial on Distance Sampling [PDF]

open access: yesJournal of Statistics Education, 2007
The technique of distance sampling is widely used to monitor biological populations. This paper documents an in-class activity to introduce students to the concepts and the mechanics of distance sampling in a simple situation that is relevant to their own experiences. Preparation details are described. Variations and extensions to the activity are also
openaire   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

Population Density Estimation of Hornbills in the Eastern Part of Huai Kha Khaeng Wildlife Sanctuary, Thailand

open access: yesEnvironment and Natural Resources Journal
Hornbills belong to the Bucerotidae Family, and almost all species within this family are vulnerable to extinction. This study examined the population density of four hornbill species in the eastern part of the rainforest of the Huai Kha Khaeng Wildlife ...
Thanapong Fueakong   +7 more
doaj   +1 more source

Testing infrared camera surveys and distance analyses to estimate feral horse abundance in a known population

open access: yesWildlife Society Bulletin, 2018
We tested the use of high‐resolution infrared (IR) camera technology and distance sampling analyses to estimate abundance of feral horses (Equus caballus) during 2015–2016 in the McCullough Peaks Herd Management Area, Wyoming, USA. Infrared technology is
Kathryn A. Schoenecker   +3 more
doaj   +1 more source

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