نتایج جستجو برای: new wintering population

تعداد نتایج: 2458768  

Journal: :The Lancet 1861

2015
KEVIN S. WHITE

Mountain goats (Oreamnos americanus) are among the most culturally and economically important large mammal species in Alaska. Due to their low population growth rates and relatively high degree of sensitivity to natural and anthropogenic disturbance, resource management decisions must be carefully evaluated to ensure sustainable populations. In this study we combined data collected from 124 GPS...

2018
Gang Liu Aaron B A Shafer Xiaolong Hu Linhai Li Yu Ning Minghao Gong Lijuan Cui Huixin Li Defu Hu Lei Qi Hengjiu Tian Bojun Wang

Food resources are often not sufficient to satisfy the nutritional and energetic requirements during winter conditions at high latitudes. Dietary analysis is a prerequisite to fully understanding the feeding ecology of a species and the nature of trophic interactions. Previous dietary studies of Asian Great Bustard (Otis tarda dybowskii) relied on behavioral observations, resulting in categoriz...

2014
Robin E Russell Karl Tinsley Richard A Erickson Wayne E Thogmartin Jennifer Szymanski

Depicting the spatial distribution of wildlife species is an important first step in developing management and conservation programs for particular species. Accurate representation of a species distribution is important for predicting the effects of climate change, land-use change, management activities, disease, and other landscape-level processes on wildlife populations. We developed models t...

Journal: :Disability Studies Quarterly 2006

2016
Walter D. Koenig

The ecological impacts of modern global climate change are detectable in a wide variety of phenomena, ranging from shifts in species ranges to changes in community composition and human disease dynamics1–3. So far, however, little attention has been given to temporal changes in spatial synchrony—the coincident change in abundance or value across the landscape4—despite the importance of environm...

2010
Denise Bewsell Margaret Brown

Dairy farming has the potential to pollute waterways through the loss of nitrogen (N), Phosphorus (P) and Faecal Indicator Organisms (FIO). Two on-farm management actions that can reduce losses of N, P and FIOs are the use of wintering feedpads, and the application of nitrification inhibitors. In this paper we outline the results of research undertaken to explore the adoption of these amongst d...

2016
Chris M. Hewson Kasper Thorup James W. Pearce-Higgins Philip W. Atkinson

Migratory species are in rapid decline globally. Although most mortality in long-distance migrant birds is thought to occur during migration, evidence of conditions on migration affecting breeding population sizes has been completely lacking. We addressed this by tracking 42 male Common Cuckoos from the rapidly declining UK population during 56 autumn migrations in 2011-14. Uniquely, the birds ...

2006
M. CLAY GREEN

Double-crested cormorants (Phalacrocorax auritus) exhibit highly adaptive and opportunistic foraging behavior. This flexibility in foraging and increases in population size have led to conflicts with aquaculture and recreational and commercial fishing (Duffy 1995). Although double-crested cormorants roosting in the lower Mississippi Valley appear to have minimal negative impact on sport fisheri...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید