RYSER: VIRGINIA OPOSSUMS (DIDELPHIS VIRGINIANA) IN FLORIDA 20 15t- 10o 0O -5 0 5 10 15 Nightly minimum temperature (OC) Figure 3. Duration of activity as a function of nightly minimum temperatures. such as along lakes and in mesic forests, density and home range overlap was apparently greater than in less productive areas. Most females stayed in a well defined area until death. Of 19 females tracked for a period of more than three months, only two clearly shifted their home range about 500-1000 m, and a third continuously expanded her range as she grew older. None of the radio-tagged females dispersed, but two were lost without being retrapped, so were possible dispersers. One female was apparently trapped and radio-tagged during a dispersal movement. She disappeared the next day, but one of her small young was trapped 4.7 km away. One marked female from outside the study area dispersed 2.8 S. I" S i ' S o * I * 'I 0; S .* B* 8 * * :* * 20 25 I