Summer and Migrational Movements of Satellite-Marked Double-Crested Cormorants from a Breeding Colony Managed by Egg-Oiling in Lake Ontario, USA
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چکیده
منابع مشابه
Organochlorine Contaminants and Reproductive Success of Double-crested Cormorants from Green Bay, Wisconsin, Usa
In 1994 and 1995, nesting success of double-crested cormorants (Phalacrocorax auritus) was measured at Cat Island, in southern Green Bay, Lake Michigan, Wisconsin, USA. Sample eggs at pipping and unhatched eggs were collected and analyzed for organochlorines (including total polychlorinated biphenyls [PCBs] and DDE), hepatic microsomal ethoxyresorufin-O-dealkylase (EROD) activity in embryos, an...
متن کاملAquaculture Depredation by Double-Crested Cormorants Breeding in Eastern North America
The double-crested cormorant (Phalacrocorax auritus) has undergone population expansion throughout much of its historical range since the 1970s, resulting in increased pressure on foraging habitats including real and perceived competition with commercial and sport fisheries and impacts on the aquaculture industry. The specific objectives of this study were to determine the stable isotope ratios...
متن کاملMorphologic and molecular identifications of digenetic trematodes in double-crested cormorants (Phalacrocorax auritus) from the Mississippi Delta, USA.
Increasing numbers of Double-crested Cormorants (Phalacrocorax auritus) in the Mississippi River Delta, USA, have been observed over the past few decades. This piscivorous bird is a definitive host for numerous digenetic trematodes, some of which may cause pathology in a fish host. We conducted a 2-yr survey of intestinal trematodes in 35 Double-crested Cormorants collected in the Mississippi D...
متن کاملPrevalence of avian paramyxovirus 1 and avian influenza virus in double-crested Cormorants (Phalacrocorax auritus) in eastern North America.
Although it is well established that wild birds, such as cormorants, carry virulent avian paramyxovirus serotype 1 (APMV-1; causative agent of Newcastle disease) and avian influenza virus (AIV), the prevalence of these viruses among Double-crested Cormorants (Phalacrocorax auritus) in the Great Lakes region of North America has not been rigorously studied. We determined the prevalences of APMV-...
متن کاملFish Losses to Double-Crested Cormorant Predation in Eastern Lake Ontario, 1992–97
We examined 4,848 regurgitated digestive pellets of double-crested cormorants (Phalacrocorax auritus) over a 6-year period (1992–97) to estimate annual predation on sport and other fishes in the eastern basin of Lake Ontario. We found more than 51,000 fish of 28 species. Using a model that incorporates annual colony nest counts; fledgling production rates; adult, immature, and young-of-year res...
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ژورنال
عنوان ژورنال: Waterbirds
سال: 2012
ISSN: 1524-4695,1938-5390
DOI: 10.1675/063.035.sp112