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CURRY AND KYNARD: BEHAVIORAL EFFECTS OF EXTENDED GALVANONARCOSIS 1299 TABLE 2. Group activity of channel catfish and rainbow trout immediately after extended galvanonarcosis of 0.5 and 3 h, after 1 h of acclimation, and after 24 h. The number of fish swimming at the end of each minute was recorded and summed for each evaluation period. Five fish were evaluated in each group. The reported values represent the total of all group activity evaluations for each time period. Number of fish evaluated in parentheses. H = heterogeneity chi-square; P = probability of larger value of chi-square is less than the reported value; ns = nonsignificant chi-square value. Observation Test Control Expected x2 df p Channel catfish, 0.5 It Immediate 211 (30) 302 (30) 256.5 Total 20.848 5 .005 Pooled 16.142 I .005 H 4.706 4 .50 ns 1 hlL 57 (30) 82 (30) 69.5 Total 20.252 6 .005 Pooled 4.496 1 .05 H 15.755 5 .01 24 h 349 (30) 333 (30) 341.0 Total 3.891 6 .75 ns Pooled 0.375 1 .75 ns H 3.516 5 .75 ns Channel catfish, 3 It Immediate 101 (30) 388 (30) 244.5 Total 176.661 6 .005 Pooled 168.444 I .005 H 8.218 5 .25 ns 1 h 37 (30) 87 (30) 62.0 Total 24.816 6 .005 Pooled 17.887 1 .005 H 5.930 5 .25 ns 24 h 327 (30) 351 (30) 339.0 Total 19.140 6 .005 Pooled 0.849 1 .50 ns H 18.290 5 .005 Rainbow trout, 0.5 It Immediate 197 (30) 360 (30) 278.5 Total 126.363 6 .005 Pooled 47.700 I .005 H 78.663 5 .005 1 hlL 94 (30) 137 (30) 115.5 Total 28 . 128 6 .005 Pooled 8.004 I .005 H 20.123 5 .005 24h 288 (30) 281 (30) 284.5 Total 8.290 6 .25 ns Pooled 0.086 1 1.00 ns H 8.204 5 .25 ns Rainbow trout, 3 It r mmediate 193 (25) 245 (25) 219.0 Total 15.207 5 .005 Pooled 6.174 I .005 H 8.034 4 .10 ns I h 58 (25) 116 (25) 87.0 Total 27.325 5 .005 Pooled 19.333 1 .005 H 7.792 4 .25 ns 24 h 175 (25) 222 (25) 198.5 Total 12.413 5 .05 Pooled 5.564 I .025 H 6.848 4 .25 ns ILGroups observed for 5 min after I-h acclimation. Groups observed for 15 min in immediate and 24-h evaluations. Results 24 h of recovery but the increase in activity was sig- nificant only for the O.5-h treatment group of channel catfish. Treated fish no longer differed from controls after 24 h (Table 1), as shown by t-test comparison of activity means for experimental and control groups. INDIVIDUAL ACTIVITY Fish narcotized with direct current showed signifi- cantly lower levels of activity immediately after treat- ment (Table 1). Treated fish were more active after