Homing of Peromyscus maniculatus in the Channelled Scablands of East-Central Washington

摘要: One hundred twenty-one Peromyscus maniculatus gambelii were used in conducting 203 homing trials from 30 different release points that ranged 64 to 1976 meters the trapping site. The habitat was open sagebrush and basalt cliffs; lakes creeks enhanced complexity distinctiveness of landscape. Homing performance decreased with increase distance poor, even short distances, across a large irrigation canal served as an ecological barrier. Although males better “homers” on average, females for longest no returned canal. The relationship between percentage returns is curve following characteristics: initial drop-off followed by moderate decrease up 550 600 meters, subsequent steep drop-off, long tail. probably depends proportion mice without motivation (for example, transients). I argue second occurs at equivalent limit life range majority individuals. Data literature are compared this conclusion. argument supported studies spontaneous movements comparing success experienced inexperienced mice. The shape observed theoretical considerations against existence orientational sense. considered be test unnatural situation these animals and, therefore, adaptive response cannot expected. discussed conclude beyond individual results disorientation expressed behavioral changes. An intimate knowledge larger than home excellent memory because natural events may force temporarily out their otherwise suitable normal range. It expecte