Results 21 to 30 of about 482,753 (287)
Ecology and Evolution, 2022 Reliable abundance estimation is a primary challenge in environmental DNA (eDNA) analysis, which has been addressed by considering the effects of eDNA transport and degradation.
Toshiaki Jo, Hiroki Yamanaka
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Chemical abundances in Seyfert galaxies – X. Sulphur abundance estimates
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line intensities from the Sloan Digital Sky Survey (SDSS) Data Release 17 (DR17) [in the wavelength range 3000
Oli L Dors +14 more
openaire +3 more sources
A Rapid Assessment of the Marine Megafauna Biodiversity Around South Bali, Indonesia
Frontiers in Marine Science, 2021 A low-cost, small-boat, rapid assessment survey was conducted on the waters off the southern Peninsula of Bali. The objectives were: (1) to conduct an inventory of cetacean species in the study area; (2) to map cetacean distribution to inform the design ...
Putu Liza Kusuma Mustika +8 more
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Estimating wolf abundance from cameras [PDF]
Ecosphere, 2022 AbstractMonitoring the abundance of rare carnivores is a daunting task for wildlife biologists. Many carnivore populations persist at relatively low densities, public interest is high, and the need for population estimates is great. Recent advances in trail camera technology provide an unprecedented opportunity for biologists to monitor rare species ...
David E. Ausband +5 more
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Estimation of badger abundance using faecal DNA typing [PDF]
, 2003 1.Wildlife management and conservation programmes often require accurate information on population density, but this can be difficult to obtain, particularly when the species in question is nocturnal or cryptic.
Burke, T. +6 more
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Estimating bird abundance: making methods work [PDF]
Bird Conservation International, 2008 SummaryIn many bird monitoring surveys, no attempt is made to estimate bird densities or abundance. Instead, counts of one form or another are made, and these are assumed to correlate with bird density. Unless complete counts on sample plots are feasible, this approach can easily lead to false conclusions, because detectability of birds varies by ...
Buckland, Stephen T. +2 more
openaire +3 more sources
Axion as a non-WIMP dark matter candidate [PDF]
, 2017 The axion arises in well-motivated extensions of the Standard Model of particle physics and is regarded as an alternative to the weakly interacting massive particle paradigm to explain the nature of dark matter.
Saikawa, Ken'ichi
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Optimal segmentation and improved abundance estimation for superpixel-based Hyperspectral Unmixing
European Journal of Remote Sensing, 2022 Superpixel-based hyperspectral unmixing (HU) can effectively reduce spectral variability’s influence on unmixing performance. In the superpixel-based HU method, this study proposes a segmentation scale determination method to improve the accuracy of ...
Qiang Guan +4 more
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Joint Bayesian endmember extraction and linear unmixing for hyperspectral imagery [PDF]
, 2009 This paper studies a fully Bayesian algorithm for endmember extraction and abundance estimation for hyperspectral imagery. Each pixel of the hyperspectral image is decomposed as a linear combination of pure endmember spectra following the linear mixing ...
Alfred O. Hero +5 more
core +9 more sources
Estimating ungulate abundance while accounting for multiple sources of observation error
Wildlife Society Bulletin, 2016 Whether a species is rare or overabundant, accurate estimates of population abundance are essential for the development and assessment of conservation plans and management goals.
Pat A. Terletzky, David N. Koons
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