Results 11 to 20 of about 4,209,032 (298)

Design and Analysis of Line Transect Surveys for Primates [PDF]

International Journal of Primatology, 2010
Line transect surveys are widely used for estimating abundance of primate populations. The method relies on a small number of key assumptions, and if these are not met, substantial bias may occur. For a variety of reasons, primate surveys often do not follow what is generally considered to be best practice, either in survey design or in analysis.
Buckland, Stephen Terrence, Plumptre, A J, Thomas, Len, Rexstad, Eric A   +3 more
openaire   +5 more sources

Floodplain Forests and Urban Parks – A Brief Comparison of Bird Diversity

Journal of Landscape Ecology, 2021
Urbanization in cultural landscapes generally tends to select for omnivorous, granivorous, and cavity/hole nesting bird species in green urban areas. Studies on bird diversity in the cities are important to better understanding to the ecology of urban ...
Machar Ivo, Poprach Karel, Praus Luděk, Úradníček Luboš   +3 more
doaj   +1 more source

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   +1 more source

Accounting for subgroup structure in line-transect abundance estimates of false killer whales (Pseudorca crassidens) in Hawaiian waters.

PLoS ONE, 2014
For biological populations that form aggregations (or clusters) of individuals, cluster size is an important parameter in line-transect abundance estimation and should be accurately measured.
Amanda L Bradford, Karin A Forney, Erin M Oleson, Jay Barlow   +3 more
doaj   +1 more source

Line transect sampling of primates : can animal-to-observer distance methods work? [PDF]

, 2010
An erratum to this article can be found at http://dx.doi.org/10.1007/s10764-010-9469-4Line transect sampling is widely used for estimating abundance of primate populations.
Eric A. Rexstad, Len Thomas, Stephen T. Buckl, Buckland, Stephen Terrence, Rexstad, Eric, Plumptre, Andrew J., Buckland, Stephen T., Stephen T. Buckland, Plumptre, A J, Rexstad, Eric A., Thomas, Len, Andrew J. Plumptre   +11 more
core   +1 more source

Hyper abundant mesopredators and bird extinction in an Atlantic forest island

Zoologia (Curitiba), 2009
Islands can serve as model systems for understanding how biological invasions affect native species. Here we examine the negative effects of mesopredator mammals on bird richness at Anchieta Island, an 826 ha offshore island in the coast of Brazil ...
Mauro Galetti, Ricardo S. Bovendorp, Rodrigo F. Fadini, Carlos O. A. Gussoni, Marcos Rodrigues, Ariane D. Alvarez, Paulo R. Guimarães Jr, Kaiser Alves   +7 more
doaj   +1 more source

Jenis-Jenis Bintang Laut Dan Bulu Babi (Asteroidea, Echinoidea: Echinodermata) Di Perairan Pulau Cilik, Kepulauan Karimunjawa

Jurnal Kelautan Tropis, 2018
Echinoderms are fundamentally good indicators of health and status of coralline communities in marine waters. Substrat of sandy, rububle and coral reefs are good habitat for Asteroidea dan Echinoidea.
Retno Hartati, Endika Meirawati, Sri Redjeki, Ita Riniatsih, Robertus Triaji Mahendrajaya   +4 more
doaj   +1 more source

Influence of Agricultural Expansion and Human Disturbance on the Encounter Rates of Nocturnal Mammals in Tropical Hill Forests in Bangladesh

Ecologies, 2023
Agricultural expansion has had a detrimental effect on tropical forests and the animal communities that depend on them. Agroforestry systems, however, with their more complex tree and plant communities, have been shown to be important habitats for a ...
Hassan Al-Razi, Marco Campera, Sabit Hasan, Marjan Maria, Vincent Nijman, K. Anne-Isola Nekaris   +5 more
doaj   +1 more source

Methods for investigating measurement error in cetacean line-transect surveys [PDF]

, 2007
Line-transect estimates of abundance generally assume that distances and angles to animals are measured without error. Biased distance measurements will lead to corresponding bias in abundance estimates.
Williams, Robert, Zerbini, AN, Hammond, Philip Steven, Leaper, R, Alexandre N. Zerbini, Philip S. Hammond, Russell Leaper, Rob Williams   +7 more
core   +1 more source

Using hidden Markov models to deal with availability bias on line transect surveys [PDF]

, 2013
This work was supported by EPSRC grant EP/I000917/1We develop estimators for line transect surveys of animals that are stochastically unavailable for detection while within detection range.
Heide-Jorgensen, M. P., Cañadas, A., Borchers, D. L., Heide-Jørgensen, M.P., Heide-Jørgensen, M. P., A. Cañadas, Borchers, David Louis, M. P. Heide‐Jørgensen, W. Zucchini, M. P. Heide-jørgensen, Zucchini, W., D. L. Borchers, Zucchini, Walter, R. Langrock, Langrock, Roland   +14 more
core   +1 more source