The Diet of Eurasian Otters in the Jajrood River System, Iran

摘要: Abstract The diet and feeding habits of Eurasian otters (Lutra lutra) were studied by spraint analysis over a one year period on the four sections Jajrood River, eastern Tehran. Two methods used to estimate proportions different prey consumed: frequency occurrence score-bulk estimate. number categories in varied between four. Fish, crabs, birds insects found spraints. Fish is main prey. Otters mainly eat fish, preferring three species: chub (Leuciscus cephalus), riffle minnow (Alburnoides bipunctatus) various barbel (Capoeta spp.) species. otters' differed significantly across sites positive for otter sign. Seasonal variation was also found: taken more cold season warm season. proportion crab almost constant throughout year. Leuciscus cephalus most fish species Capoeta spp. Only L. Cephalus...