Results 261 to 270 of about 49,315 (282)

Living on the edge: Depletion of wild prey and survival of the snow leopard

2016
Snow leopards have a narrow diet spectrum and tend to prefer mountain ungulates, even where this prey is much less abundant than livestock. This feature makes the snow leopard particularly sensitive to human-induced local depletion of wild prey, as retaliatory killing by herders can exert a heavy toll on snow leopards' feeding on domestic ungulates. In
LOVARI, SANDRO, Mishra, Charudutt
openaire   +3 more sources

Prey depletion by the foraging of the Eurasian treecreeper, Certhia familiaris, on tree-trunk arthropods

Oecologia, 2001
We examined to what extent breeding insectivorous treecreepers, Certhia familiaris, affect the abundance and the mean size of their prey population on the surface of tree trunks. In order to determine foraging pressure on tree trunks, we observed the parent birds' foraging behaviour in marked squares (25×25 m) at a short (10 m) and long distance (90 m)
Ari, Jäntti, Teija, Aho, Harri, Hakkarainen, Markku, Kuitunen, Jukka, Suhonen   +4 more
openaire   +2 more sources

The Economics of Protecting Tiger Populations: Linking Household Behaviour to Poaching and Prey Depletion

SSRN Electronic Journal, 2002
The tiger ( Panthera tigris ) is classified as endangered and populations continue to decline. This paper presents a formal economic analysis of the two most imminent threats to the survival of wild tigers: poaching tigers and hunting their prey. A model is developed to examine interactions between tigers and farm households living in and around tiger ...
Damania, R., Stringer, R., Karanth, K., Stith, B.   +3 more
openaire   +2 more sources

Emergent effects of multiple predators on prey survival: the importance of depletion and the functional response

Ecology Letters, 2012
AbstractThe combined effects of multiple predators often cannot be predicted from their independent effects. Emergent multiple predator effects (MPEs) include risk enhancement, where combined predators kill more prey than predicted by their individual effects, and risk reduction, where fewer prey are killed than predicted. Current methods for detecting
Michael W, McCoy, Adrian C, Stier, Craig W, Osenberg   +2 more
openaire   +2 more sources

Effect of Localized Prey Depletion on Prey Selectivity by Fish

Transactions of the American Fisheries Society, 1988
Abstract I compared the prey consumption by bluegills Lepomis macrochirus feeding on two size-classes of Daphnia magna with the diets predicted by the apparent-size model of foraging. The diets of fish that were acclimated to the laboratory for only 1 or 2 weeks contained significantly more small prey than predicted, but the diets of fish acclimated to
openaire   +1 more source

Prey Selection By Predators Depleting a Patch; an Ess Model

Netherlands Journal of Zoology, 1990
An important group of prey selection models are static optimal diet models in which it is assumed that a predator maximizes its instanteneous rate of gain (energy per unit of time). In these models the encounter rate with different prey types is constant.
openaire   +1 more source

Prey Depletion by Odonate Larvae: Combining Evidence from Multiple Field Experiments

Ecology, 1987
In this paper we re—analyze previously published data regarding the response of several prey populations to manipulation of predaceous larval dragonfly (Insecta: Odonata) densities in four separate field enclosure experiments. Using a computer—intensive "rerandomization" approach to testing hypotheses, we show that the individual experiments were not ...
Dan M. Johnson, Clay L. Pierce, Thomas H. Martin, Charles N. Watson, Robert E. Bohanan, Philip H. Crowley   +5 more
openaire   +1 more source

Depleting wild prey compels common leopard (Panthera pardus) to sustain on livestock

Animal Biology, 2019
AbstractThe wide distribution of a predator can reflect its flexibility in adapting to various ecosystems. The common leopard (Panthera pardus) is “Critically Endangered” in Pakistan while the IUCN Red List categorizes it globally as “Vulnerable”. This study investigated the distribution of the common leopard and the contribution of livestock in its ...
Abid Hussain, Tariq Mahmood, Faraz Akrim, Shaista Andleeb, Hira Fatima, Abdul Hamid, Muhammad Waseem   +6 more
openaire   +1 more source

Investigating the role of prey depletion in cetacean distributions and population dynamics

2023
A key driver in determining the distribution and demography of cetaceans is the dispersion of their prey, in terms of availability, abundance and quality. A Working Group on Resource Depletion has been established within ASCOBANS to review current knowledge and develop recommendations for research and action.
Pierce, Graham J., Brownlow, Andrew, Evans, Peter G. H., Ijsseldijk, Lonneke, Kaminska, Katarzyna, Kessler, Lucie, Leopold, Mardik, Murphy, Sinéad, Pinn, Eunice, Ridoux, Vincent, Simmonds, Mark P., Spitz, Jérôme, Stockin, Karen, Taylor, Nikki, Renell, Jenny   +14 more
openaire   +1 more source

Predator declines and morphological changes in prey: evidence from coral reefs depleted of sharks

Marine Ecology Progress Series, 2018
We thank the Western Australian Departments of Fisheries, Parks and Wildlife (DPaW), the Commonwealth Department of Sustainability, Environment, Water, Population and Communities for arranging permits to conduct research at the Scott Reefs and the Rowley Shoals.
N Hammerschlag, SC Barley, DJ Irschick, JJ Meeuwig, ER Nelson, MG Meekan   +5 more
openaire   +1 more source