New model directly links tiger numbers to amount of prey, study says
Scientists from the New York-based Wildlife Conservation Society (WCS) and their collaborators from the US Geological Survey’s wildlife research center in Maryland have developed a model that shows a solid quantitative relationship between tiger numbers and the amount of prey available to these highly endangered big cats. Published in the latest edition of the Proceedings of the National Academy of Sciences, the model can not only accurately predict tiger density over a variety of habitats, but also help safeguard populations by pinpointing the causes of their decline.
The authors tested their model by sampling tiger and prey populations in 11 ecologically distinct sites in India – from grasslands to dry forests – over an eight-year period, with teams of biologists walking more than 4,200 miles to count prey animals, and setting hundreds of camera traps over 8,600 days of effort. Densities of ungulate prey such as deer, antelopes, wild cattle and wild pigs ranged from a low of 5.3 animals per square kilometer in Meghat Reserve, to more than 63 per square kilometer in Pench Reserve. The model predictions matched the measured tiger densities ranging between 3.2 to 16.8 tigers per 100 square kilometers.
Stephen Sautner | WCS
A Rescue Plan for the Ocean
16.08.2019 | Institute for Advanced Sustainability Studies e.V.
Burst Hope: No chance for environment-relieving plastic decomposition by bacteria
07.08.2019 | Leibniz-Institut für Ostseeforschung Warnemünde
Soft robots have a distinct advantage over their rigid forebears: they can adapt to complex environments, handle fragile objects and interact safely with humans. Made from silicone, rubber or other stretchable polymers, they are ideal for use in rehabilitation exoskeletons and robotic clothing. Soft bio-inspired robots could one day be deployed to explore remote or dangerous environments.
Most soft robots are actuated by rigid, noisy pumps that push fluids into the machines' moving parts. Because they are connected to these bulky pumps by tubes,...
Researchers at TU Graz are working together with European partners on new possibilities of measuring vehicle emissions.
Today, air pollution is one of the biggest challenges facing European cities. As part of the Horizon 2020 research project CARES (City Air Remote Emission...
Over the next three years, researchers from the Vrije Universiteit Brussel, University of Cambridge, École Supérieure de Physique et de Chimie Industrielles de la ville de Paris (ESPCI-Paris) and Empa will be working together with the Dutch Polymer manufacturer SupraPolix on the next generation of robots: (soft) robots that ‘feel pain’ and heal themselves. The partners can count on 3 million Euro in support from the European Commission.
Soon robots will not only be found in factories and laboratories, but will be assisting us in our immediate environment. They will help us in the household, to...
Scientists at the University of Leeds have created a new form of gold which is just two atoms thick - the thinnest unsupported gold ever created.
The researchers measured the thickness of the gold to be 0.47 nanometres - that is one million times thinner than a human finger nail. The material is regarded...
An international team of scientists involving the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg has unraveled the light-induced electron-localization dynamics in transition metals at the attosecond timescale. The team investigated for the first time the many-body electron dynamics in transition metals before thermalization sets in. Their work has now appeared in Nature Physics.
The researchers from ETH Zurich (Switzerland), the MPSD (Germany), the Center for Computational Sciences of University of Tsukuba (Japan) and the Center for...
16.08.2019 | Event News
14.08.2019 | Event News
12.08.2019 | Event News
19.08.2019 | Information Technology
19.08.2019 | Physics and Astronomy
19.08.2019 | Life Sciences