Results 221 to 230 of about 9,048 (239)
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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 +4 more
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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 +4 more
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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. +3 more
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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. +3 more
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Prey Selection By Predators Depleting a Patch; an Ess Model
Netherlands Journal of Zoology, 1990An 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.
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Investigating the role of prey depletion in cetacean distributions and population dynamics
2023A 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. +14 more
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Prey Depletion by Odonate Larvae: Combining Evidence from Multiple Field Experiments
Ecology, 1987In 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 +5 more
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Depleting wild prey compels common leopard (Panthera pardus) to sustain on livestock
Animal Biology, 2019AbstractThe 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 +6 more
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Ecological Applications, 2012
The nature and impact of fishing on predators that share a fished resource is an important consideration in ecosystem‐based fisheries management. Krill (Euphausia superba) is a keystone species in the Antarctic, serving as a fundamental forage source for predators and simultaneously being subject to fishing.
Plagányi, Éva E, Butterworth, Doug S
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The nature and impact of fishing on predators that share a fished resource is an important consideration in ecosystem‐based fisheries management. Krill (Euphausia superba) is a keystone species in the Antarctic, serving as a fundamental forage source for predators and simultaneously being subject to fishing.
Plagányi, Éva E, Butterworth, Doug S
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Journal of Animal Ecology
Abstract Understanding the mechanisms by which competing species coexist is fundamental for explaining the distribution and abundance of organisms. Many coexistence mechanisms require trade‐offs in the ability to deplete shared resources, but resource depletion by ...
Amber N. Wright +3 more
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Abstract Understanding the mechanisms by which competing species coexist is fundamental for explaining the distribution and abundance of organisms. Many coexistence mechanisms require trade‐offs in the ability to deplete shared resources, but resource depletion by ...
Amber N. Wright +3 more
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Predator declines and morphological changes in prey: evidence from coral reefs depleted of sharks
Marine Ecology Progress Series, 2018We 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 +5 more
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Influence of prey depletion and human disturbance on tiger occupancy in
AbstractTigers are globally endangered and continue to decline due to poaching, prey depletion and habitat loss. In Nepal, tiger populations are fragmented and found mainly in four protected areas (PAs). To establish the use of standard methods, to assess the importance of prey availability and human disturbance on tiger presence and to assess tiger ...
S. M. Barber‐Meyer +13 more
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