| biological effects of polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls in double-crested cormorant chicks (phalacrocorax auritus). | the present project assessed the effect of environmental contamination with polychlorinated dibenzo-p-dioxins (pcdds), dibenzofurans (pcdfs), and biphenyls (pcbs) on hepatic microsomal ethoxyresorufin o-deethylase (erod) activities and morphological parameters in matched double-crested cormorant (phalacrocorax auritus) hatchlings from egg clutches chosen for chemical analysis. double-crested cormorant eggs were collected from five colonies across canada, with differing levels of contamination. l ... | 1994 | 8301702 |
| an epidemic of newcastle disease in double-crested cormorants from saskatchewan. | a newcastle disease epidemic in double-crested cormorants (phalacrocorax auritus) occurred in july and august 1995, during a 1994-96 study of a breeding colony of this species on doré lake (saskatchewan, canada). clinical signs and mortality were observed from a tunnel-and-blind system, and moribund and freshly dead birds were examined virologically. yolks from cormorant eggs and sera from cormorants and other birds were tested for hemagglutination inhibiting antibodies to newcastle disease viru ... | 1998 | 9706555 |
| pathology of newcastle disease in double-crested cormorants from saskatchewan, with comparison of diagnostic methods. | newcastle disease (nd) in juvenile double-crested cormorants (phalacrocorax auritus) occurred several times since 1975, but there are relatively few studies on its pathology and diagnosis. in order to describe the distribution of newcastle disease virus (ndv) and associated lesions in cormorants with nd and to compare diagnostic methods, 25 cormorants with nervous signs from a nd epizootic in saskatchewan in 1995 (nde cormorants) were compared with 18 negative control cormorants. tissues of thes ... | 1999 | 10073341 |
| causes of morbidity and mortality and their effect on reproductive success in double-crested cormorants from saskatchewan. | the objectives of this study were to describe causes of morbidity and mortality in a breeding colony of double-crested cormorants (phalacrocorax auritus) on doré lake (saskatchewan, canada), and to determine cause-specific mortality rates of juvenile birds. morbidity and mortality were monitored every third day during the breeding season from 1994 to 1996 from inside a tunnel-and-blind system. affected eggs and birds were collected for examination and diagnosis. the cause of mortality was determ ... | 1999 | 10231760 |
| isolation of newcastle disease virus and salmonella typhimurium from the brain of double-crested cormorants (phalacrocorax auritus). | avian paramyxovirus type 1 (newcastle disease virus) and salmonella typhimurium were isolated from the brain and lung tissues of double-crested cormorants (phalacrocorax auritus) from lac canard, alberta, canada. more than 100 birds died during this outbreak in 1999. affected birds presented signs of central nervous system disease characterized by unilateral wing and leg paralysis. other geographic locations in the provinces of alberta and saskatchewan have reported cases of cormorants suffering ... | 2001 | 11332490 |
| differential trends in mercury concentrations in double-crested cormorant populations of the canadian prairies. | mercury and selenium concentrations were measured in double-crested cormorants (phalacrocorax auritus), piscivorous fish, and common prey items in five lakes in two ecoregions in saskatchewan, canada. hg and se concentrations in cormorants were within the natural ranges of birds living in un-impacted sites. site explained a significant proportion of the variation in total hg (thg) and methylmercury (mehg) concentrations in both cormorant breast muscle and livers. birds nesting on more northern l ... | 2014 | 24515398 |