Variation of Basal EROD Activities in Ten Passerine Bird Species – Relationships with Diet and Migration Status

摘要: Inter-specific differences in animal defence mechanisms against toxic substances are currently poorly understood. The ethoxyresorufin-O-deethylase (EROD) enzyme plays an important role chemicals a wide variety of animals, and it is biomarker for environmental contamination. We compared basal hepatic EROD activity levels among ten passerine species to see if there inter-specific variation activity, especially relation their diet migration status. Migratory insectivores showed higher granivores. hypothesize that the variable invertebrate migratory contains wider range natural toxins than narrower This may have affected evolution mixed function oxidases (MFO) system activities. further tested whether metabolic rates or relative liver size were associated with detoxification capacity. found no association between (per mass unit) rate (BMR). Instead, (% body mass) correlated positively, suggesting proportionally large also functions efficiently. Our results suggest granivores non-migratory birds be more vulnerable contaminants birds. status, however, phylogenetically strongly connected each other, roles cannot fully separated our analysis only species.