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Can a 'wintering area effect' explain population status of Swainson's hawks? A stable isotope approach
(Wiley Blackwell Publishing, Inc, 2008-07)
It has been suggested that declines in breeding populations of Swainson's hawks (Buteo swainsoni) in California, Oregon, and Nevada may be due to differential mortality of hawks on their wintering grounds. Although massive ...
No evidence of strong host resource segregation by phorid parasitoids of leaf-cutting ants
(Gauthier-Villars/Editions Elsevier, 2018-11)
Resource segregation by species is a cornerstone ecological concept that may result from several processes such as interspecific competition, and can help structuring communities, in particular parasitoid communities. ...
Is there sexual segregation in habitat selection by Black-browed Albatrosses wintering in the south-west Atlantic?
(Csiro Publishing, 2021-01)
Sexual segregation in habitat use occurs when sexes differ in their use of the physical environment and is widely reported among seabirds. The Black-browed Albatross (Thalassarche melanophris) is one of the most abundant ...
Sex-specific spatial use of the winter foraging areas by Magellanic penguins and assessment of potential conflicts with fisheries during winter dispersal
(Public Library of Science, 2021-08)
Magellanic penguins (Spheniscus magellanicus) disperse widely during winter and are a major consumer of marine resources over the Patagonian Shelf. Magellanic penguins were equipped with geolocators at Martillo Island in ...
Sexual dimorphism and diet segregation in the Black Skimmer Rynchops niger
(Nederlandse Ornithologische Unie, 2007-12)
Sexual segregation during foraging is common in birds and may occur at different temporal and spatial scales. In this study we explored the degree of sexual segregation in the Black Skimmer Rynchops niger by studying the ...
Travel for sex: Long-range breeding dispersal and winter haulout fidelity in southern sea lion males
(Elsevier Gmbh, 2016-01)
Southern sea lions (Otaria flavescens; SSLs) have a polygynous mating system and a prolonged social-sexual maturation period for males. Male haulouts are common in this species, with some very distant from central breeding ...
Mapping Energy Poverty: How Much Impact Do Socioeconomic, Urban and Climatic Variables Have at a Territorial Scale?
(MDPI, 2022)
Energy poverty, considered a form of deprivation distinct from income poverty, is associated with three factors: low-income levels, high energy costs, and poor residential energy efficiency. It is necessary to study the ...
Geolocation and stable isotopes indicate habitat segregation between sexes in Magellanic penguins during the winter dispersion
(Wiley Blackwell Publishing, Inc, 2020-02)
The Magellanic penguin Spheniscus magellanicus is a top predator and a major consumer of marine resources in the Patagonian Continental Shelf and worldwide. It is the most migratory of the Spheniscus penguins, but until ...
Distribution and migration of the Mississippi Kites in South AmericaLa distribución y migración de Ictinia mississippiensis en América del Sur
(Wiley Blackwell Publishing, Inc, 2013-08)
Mississippi Kites (Ictinia mississippiensis) are trans-equatorial, long-distance migrants that breed in North America and overwinter in South America. Information about their migration routes and winter distribution in ...
Niche Segregation between Wild and Domestic Herbivores in Chilean Patagonia
(PLoS ONE, 2013)
Competition arises when two co-occuring species share a limiting resource. Potential for competition is higher when species
have coexisted for a short time, as it is the case for herbivores and livestock introduced in ...