Status of the Short-eared Owl (Asio flammeus) in Alberta
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Genetic divergence analysis of the Common Barn Owl Tyto alba (Scopoli, 1769) and the Short-eared Owl Asio flammeus (Pontoppidan, 1763) from southern Chile using COI sequence
In this paper new mitochondrial COI sequences of Common Barn Owl Tyto alba (Scopoli, 1769) and Short-eared Owl Asio flammeus (Pontoppidan, 1763) from southern Chile are reported and compared with sequences from other parts of the World. The intraspecific genetic divergence (mean p-distance) was 4.6 to 5.5% for the Common Barn Owl in comparison with specimens from northern Europe and Australasia...
متن کاملAssessment of toxicity and potential risk of the anticoagulant rodenticide diphacinone using Eastern screech-owls (Megascops asio).
In the United States, new regulatory restrictions have been placed on the use of some second-generation anticoagulant rodenticides. This action may be offset by expanded use of first-generation compounds (e.g., diphacinone; DPN). Single-day acute oral exposure of adult Eastern screech-owls (Megascops asio) to DPN evoked overt signs of intoxication, coagulopathy, histopathological lesions (e.g.,...
متن کاملELECTRORETINOGRAMS AND RETINAL STRUCTURE OF THE EASTERN SCREECH OWL <i>Otus asio</i> AND GREAT HORNED OWL <i>Bubo virginianus</i>
Electroretinograms (ERGs) were recorded from 2 species of owls: Eastern Screech Owl (Otus asio) and Great Horned Owl (Bubo virginianus). Dark adaptation and flicker stimuli were used to determine retinal activity and to infer retinal structure. The dark adaptation results howed typical patterns associated with retinas composed primarily of rods. This was indicated by the late regeneration of th...
متن کاملDIFFERENTIAL mIGRATION BY SEx IN NORTH AmERICAN SHORT-EARED OWLS
Differential migration of the sexes is known in over 60 bird species and may be the predominant pattern in migratory birds. Identifying the causes of differential migration has been difficult, in part because sex-specific migratory patterns have yet to be described for a majority of species. We used the Internet specimen-data portal Ornis to compile sex-specific data on the seasonal distributio...
متن کاملAssessment of toxicity and potential risk of the anticoagulant rodenticide diphacinone using Eastern screech-owls (<i>Megascops asio</i>)
In the United States, new regulatory restrictions have been placed on the use of some second-generation anticoagulant rodenticides. This action may be offset by expanded use of first-generation compounds (e.g., diphacinone; DPN). Single-day acute oral exposure of adult Eastern screech-owls (Megascops asio) to DPN evoked overt signs of intoxication, coagulopathy, histopathological lesions (e.g.,...
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تاریخ انتشار 2001