نتایج جستجو برای: pelicans
تعداد نتایج: 147 فیلتر نتایج به سال:
Colonial birds must derive benefits from living in conspecific groups and with other species. One possible benefit is that they follow previously successful individuals to foraging sites (information center hypothesis). To test for evidence of intraand interspecific information transfer, we assessed the group size and composition of flights of doublecrested cormorants (Phalacrocorax auritus) an...
The Prespa Lakes area in Greece—comprised partly of lake Great and Lesser the Vromolimni pond—has a global importance for biodiversity. Although waters show regular cyanobacteria blooms, assessments water quality threats are limited. Samples collected 2012 revealed scattered low microcystin (MC) concentrations (<0.2 ?g MC L?1) whereas considerable spatial heterogeneity both total chlorophyll...
West Nile virus (WNV)-associated deaths of American white pelican (Pelecanus erythrorhynchos) chicks have been recognized at various nesting colonies in the United States since 2002. We evaluated American white pelican nesting colonies in Sheridan County, Montana, USA, for an association between WNV-positive pelican carcasses and human West Nile neuroinvasive disease. Persons in counties hostin...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید