Results 271 to 280 of about 739,700 (305)

Predicting the Distribution of Individuals and the Consequences of Habitat Loss: The Role of Prey Depletion

Journal of Theoretical Biology, 1993
Abstract We suggest a theoretical framework for predicting the distribution of predators when interference between predators is insignificant but depletion of the prey population is important. The pattern of density-dependent mortality of the prey can then be predicted.
W. Sutherland, C. Anderson
semanticscholar   +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
M. W. McCoy, A. Stier, C. Osenberg
semanticscholar   +3 more sources

Patterns of winter field use by Starlings Sturnus vulgaris: how important is prey depletion?

Bird Study, 1999
From a knowledge of Ideal Free Distribution theory1 we might be able to predict temporal patterns of habitat use by Starlings Sturnus vulgaris on the basis of changes in resource availability. We measured depletion of soil invertebrates by Starlings by studying the foraging behaviour of individual Starlings held in enclosures.
S. C. Whitehead, Jonathan Wright, P. A. Cotton   +2 more
semanticscholar   +2 more sources

Food limitation of seabirds in the Benguela ecosystem and management of their prey base

Namibian Journal of Environment, 2022
Four of seven seabirds that are endemic to the Benguela ecosystem (African Penguin Spheniscus demersus, Cape Gannet Morus capensis, Cape Cormorant Phalacrocorax capensis, Bank Cormorant P.
R. Crawford, WJ Sydeman, DB Tom, JA Thayer, R. Sherley, L. Shannon, AM McInnes, A. Makhado, C. Hagen, R. Furness, T. Carpenter-Kling, C. Saraux   +11 more
semanticscholar   +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

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

The evidence for and urgency of threats to African wild dogs from prey depletion and climate change

Biological Conservation, 2023
© This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/. Deposited by shareyourpaper.org and openaccessbutton.org. We've taken reasonable steps to ensure this content doesn't violate copyright.
Creel, Scott, Becker, Matthew S., de Merkle, Johnathan Reyes, Goodheart, Ben   +3 more
openaire   +1 more source

Cheetah (Acinonyx jubatus) diet in the wild-prey-depleted, but livestock-abundant, Limpopo National Park, Mozambique

Mammal Research
Abstract Understanding carnivore resource use, particularly in regions with depleted wild-prey and abundance of livestock that characterise much of their remaining habitat, is crucial to their effective conservation and management. We assessed cheetah (Acinonyx jubatus) diet in the prey-depleted, but livestock-abundant, Limpopo National Park (
Ryan E. Forbes, Kristoffer T. Everatt, G. Spong, G. Kerley   +3 more
semanticscholar   +2 more sources

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

Conservation by native peoples

Human Nature, 1994
Native peoples have often been portrayed as natural conservationists, living a "balanced" existence with nature. It is argued that this perspective is a result of an imprecise operational definition of conservation. Conservation is defined here in contrast to the predictions of foraging theory, which assumes that foragers will behave to maximize their ...
openaire   +2 more sources