Results 1 to 10 of about 288,912 (350)

Unmanned aerial survey of elephants. [PDF]

PLoS ONE, 2013
The use of a UAS (Unmanned Aircraft System) was tested to survey large mammals in the Nazinga Game Ranch in the south of Burkina Faso. The Gatewing ×100™ equipped with a Ricoh GR III camera was used to test animal reaction as the UAS passed, and ...
Cédric Vermeulen, Philippe Lejeune, Jonathan Lisein, Prosper Sawadogo, Philippe Bouché   +4 more
doaj   +6 more sources

Selous aerial survey 1981

Pachyderm, 1983
Summarizes results from the 1981 Selous aerial survey, which included about 35% of the Reserve, and compares them to the 1976 data. Elephant numbers seem to have remained relatively stable with the 1976 estimate being 82,628 +/- 17% and the 1981 one ...
Markus Borner
doaj   +2 more sources

Variation in Ringed Seal (Pusa hispida) Density Along a Latitudinal Gradient of Sea‐Ice Conditions [PDF]

Ecology and Evolution
Anthropogenic climate warming is triggering poleward species redistributions, highlighting the importance of understanding how species distributions and abundance vary along latitudinal gradients.
Cody G. Carlyle, James D. Roth, Brent G. Young, David J. Yurkowski, Christine Michel, Steven H. Ferguson   +5 more
doaj   +2 more sources

Concealed anatomy and new geological features beneath desert areas of NW India – Constrained from high resolution aero-geophysical data

Journal of Asian Earth Sciences: X, 2022
The vast swathe of area in the Trans-Aravalli region between the western part of the South Delhi Fold Belt and eastern part of the Barmer basin, north-western India exhibits limited geological information due to thick sand cover of the Thar Desert.
Debojit Talukdar, Ashish Kumar Raul, Ch Ravi Kumar, Antony Selinraj, Niroj Kumar Sarkar, Bijay Kumar Sahu, Manoranjan Mohanty, K.V. Maruthi   +7 more
doaj   +1 more source

Distribution, sources and toxicity of heavy metals in surface sediments of north western Karnataka, south India

Scientific Reports, 2022
This study presents spatial distribution, sources and toxicological risks of As, Cr, Cu, Hg, Ni, Pb, and Zn in the surface sediments from north-western Karnataka, southern India.
Ishfaq Ahmad Mir, M. SreePrabash, V. Sridhar, K. V. Maruthi   +3 more
doaj   +1 more source

The Potential of Satellite Imagery for Surveying Whales

Sensors, 2021
The emergence of very high-resolution (VHR) satellite imagery (less than 1 m spatial resolution) is creating new opportunities within the fields of ecology and conservation biology.
Caroline Höschle, Hannah C. Cubaynes, Penny J. Clarke, Grant Humphries, Alex Borowicz   +4 more
doaj   +1 more source

Lithology-Based 3D Modeling of Urban Geological Attributes and Their Engineering Application: A Case Study of Guang’an City, SW China

Frontiers in Earth Science, 2022
Urban geological modeling (UGM) is a fundamental approach for the visualization of underground space and recognition of complex geological conditions of a city.
Fang Zhou, Minghui Li, Congjun Huang, Hong Liang, Yujie Liu, Jianlong Zhang, Baodi Wang, Ming Hao   +7 more
doaj   +1 more source

Application of hyperspectral remote sensing for supplementary investigation of polymetallic deposits in Huaniushan ore region, northwestern China

Scientific Reports, 2021
A gold–silver–lead–zinc polymetallic ore was selected in Huaniushan, Gansu Province as the study area. Hyperspectral aerial images as the primary information source, ground spectrum tests, and sampling analysis were used as auxiliary techniques.
Yu-qing Wan, Yu-hai Fan, Mou-shun Jin
doaj   +1 more source

Assessing rotation-invariant feature classification for automated wildebeest population counts [PDF]

, 2016
Accurate and on-demand animal population counts are the holy grail for wildlife conservation organizations throughout the world because they enable fast and responsive adaptive management policies.
Borner, Felix, Borner, Markus, Dobson, Andrew P., Fredrick, Howard, Hopcraft, J. Grant C., Lloyd-Jones, David J., Maliti, Honori T., Moyer, David, Mwita, Machoke, Torney, Colin J.   +9 more
core   +7 more sources

Drivers of Bornean Orangutan Distribution across a Multiple-Use Tropical Landscape

Remote Sensing, 2021
Logging and conversion of tropical forests in Southeast Asia have resulted in the expansion of landscapes containing a mosaic of habitats that may vary in their ability to sustain local biodiversity.
Sol Milne, Julien G. A. Martin, Glen Reynolds, Charles S. Vairappan, Eleanor M. Slade, Jedediah F. Brodie, Serge A. Wich, Nicola Williamson, David F. R. P. Burslem   +8 more
doaj   +1 more source