نتایج جستجو برای: new wintering population

تعداد نتایج: 2458768  

2014
Neil Paprocki Julie A. Heath Stephen J. Novak

Studies of multiple taxa across broad-scales suggest that species distributions are shifting poleward in response to global climate change. Recognizing the influence of distribution shifts on population indices will be an important part of interpreting trends within management units because current practice often assumes that changes in local populations reflect local habitat conditions. Howeve...

2014
Laura A. McFarlane Tranquilla William A. Montevecchi David A. Fifield April Hedd Anthony J. Gaston Gregory J. Robertson Richard A. Phillips

Individual wintering strategies and patterns of winter site fidelity in successive years are highly variable among seabird species. Yet, an understanding of consistency in timing of movements and the degree of site fidelity is essential for assessing how seabird populations might be influenced by, and respond to, changing conditions on wintering grounds. To explore annual variation in migratory...

2002
GARY R. GRAVES

-census methods developed for breeding populations of Nearctic-Neotropic migrant passerines are largely ineffective for determining the distribution and abundance of Swainson’ s Warbler (Limnothlypis swainsonii) on its wintering grounds in the Caribbean basin. Using playback of tape-recorded call notes interspersed with advertising songs, I found the warbler to be widespread and relatively comm...

Journal: :Journal of Bioresource Management 2021

This study was focused on the ecology and behavior of White-headed Duck (Oxyura leucocephala) at Garaet Hadj Tahar (Guerbes-Sanhadja, North East Algeria). Sampling carried out during two wintering seasons (2017-2018 2018-2019). High number this duck recorded in 2018/19 (350 individuals). We observed Oxyura population, first sedentary, second, hosted season. Diurnal time budget dominated by comf...

2007
R. D. LONGHURST

Winter is a very important period during the dairying calendar. Regions such as Southland, with susceptible soils and extended periods with soils at saturation levels will face increasing pressure to review wintering practices. On-farm options for wintering cows to protect soils and prevent pasture damage are needed. This requires a turn-around in philosophy from taking cows to pasture/crops, t...

Journal: :Proceedings of the Vertebrate Pest Conference 2012

Journal: :The Journal of heredity 2012
Samuel Riou Olivier Combreau Jacky Judas Mark Lawrence Mohamed Saleh Al Baidani Christian Pitra

The Asian houbara bustard Chlamydotis macqueenii is a partial migrant of conservation concern found in deserts of central Asia and the Middle East. In the southern part of the species range, resident populations have been greatly fragmented and reduced by sustained human pressure. In the north, birds migrate from breeding grounds between West Kazakhstan and Mongolia to wintering areas in the Mi...

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