نتایج جستجو برای: seasonal habitat use

تعداد نتایج: 1845293  

Journal: :The American naturalist 2003
Allen H Hurlbert John P Haskell

We analyzed geographic patterns of richness in both the breeding and winter season in relation to a remotely sensed index of seasonal production (normalized difference vegetation index [NDVI]) and to measures of habitat heterogeneity at four different spatial resolutions. The relationship between avian richness and NDVI was consistent between seasons, suggesting that the way in which available ...

1976
J. N. JOLLY

The habitat use and movements of a population of Australian, brush-tailed opossums. Trichosurus vulpecula (Kerr), were studied by live-trapping, spotlighting and radiotelemetry in a mixed pasture, bush and scrub habitat on Banks Peninsula, New Zealand. Resident opossums had distinct ranges that for some animals varied in position and size and, for all. varied in intensity of use of habitat type...

2014
Robert S McCann Joseph P Messina David W MacFarlane M Nabie Bayoh John M Vulule John E Gimnig Edward D Walker

BACKGROUND Predictive models of malaria vector larval habitat locations may provide a basis for understanding the spatial determinants of malaria transmission. METHODS We used four landscape variables (topographic wetness index [TWI], soil type, land use-land cover, and distance to stream) and accumulated precipitation to model larval habitat locations in a region of western Kenya through two...

2015
Claudia Melis Ivar Herfindal Fredrik Dahl Per-Arne Åhlén

Gathering information on how invasive species utilize the habitat is important, in order to better aim actions to reduce their negative impact. We studied habitat use and selection of 55 GPS-marked raccoon dogs (30 males, 25 females) at their invasion front in Northern Sweden, with particular focus on differences between males and females, between movement states, and between seasons and times ...

1999
FIORENZA MICHELI

This study links spatial and seasonal patterns of mortality of the hard clam, Mercenaria mercenaria (L.), in marine soft bottoms with the predation rates and habitat use of its main predator, the blue crab, Callinectes sapidus Rathbun. Patterns of predation on tethered juvenile clams exposed to the natural assemblage of predators were compared among different habitat types in fall and summer. B...

ملکیان, منصوره , مومنی, مسلم , همامی , محمودرضا ,

Persian wild ass, Equus hemionus onager, is a rare subspecies of Asiatic wild ass endemic to Iran, which was historically widespread in arid and semi-arid steppes of central and southeastern Iran. Today only two natural populations have remained. This subspecies is listed as Critically Endangered in the Red List of the International :::union::: for the Conservation of Nature and Natural Resourc...

2007
Stephen M. Wall Corey J. A. Bradshaw Colin J. Southwell Nicholas J. Gales Mark A. Hindell

Southern Ocean waters are highly productive and contain important food resources for many indigenous predators, including humans. Management of these resources has fallen under the regulation of the Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR), which has identified a suite of predators as indicator species for monitoring ecosystem fluctuations, including crabeat...

2015
Jeffrey R Row Sara J Oyler-McCance Jennifer A Fike Michael S O'Donnell Kevin E Doherty Cameron L Aldridge Zachary H Bowen Bradley C Fedy

Given the significance of animal dispersal to population dynamics and geographic variability, understanding how dispersal is impacted by landscape patterns has major ecological and conservation importance. Speaking to the importance of dispersal, the use of linear mixed models to compare genetic differentiation with pairwise resistance derived from landscape resistance surfaces has presented ne...

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