Movements of Western Chorus Frogs Pseudacris triseriata triseriata Tagged with Co 60

The movements of Pseudacris triseriata triseriata tagged with Co60 are reported. A total of 324 recaptures involving 62 specimens was made from 25 March to 4 August 1970. Dispersal from the breeding pools was gradual. Most specimens remained within 100 m of the breeding pools where they were tagged but 15 moved farther and two moved away over 200 m. The mean daily rate of movement was 3.5 m/day but the greatest rate of movement observed was 42 mn/day. The frogs tended to remain hidden among leaf litter during the daylight hours and their daily period of activity appeared to occur between dusk and dawn.