| influence of climate change on productivity of american white pelicans, pelecanus erythrorhynchos. | in the past decade, severe weather and west nile virus were major causes of chick mortality at american white pelican (pelecanus erythrorhynchos) colonies in the northern plains of north america. at one of these colonies, chase lake national wildlife refuge in north dakota, spring arrival by pelicans has advanced approximately 16 days over a period of 44 years (1965-2008). we examined phenology patterns of pelicans and timing of inclement weather through the 44-year period, and evaluated the con ... | 2014 | 24416165 |
| the 1992 epizootic of newcastle disease in double-crested cormorants in north america. | in the summer of 1992, morbidity and mortality in juvenile double-crested cormorants (phalacrocorax auritus; dcc) attributable to newcastle disease virus (ndv) was observed for the first time in seven northern usa states and one canadian province, and recurred in three western canadian provinces. based on clinical signs and laboratory diagnostic findings, dcc mortality from ndv occurred in 59 of the 63 nesting colonies and two of three non-colony sites investigated. an estimate of in excess of 2 ... | 1999 | 10231759 |