| |
Table 1 Percentage of Animals of Five Inbred Strains Showing Aggressive Behavior in Four Types of Tests (1) |
Page 13 |
| Test & Behavior | WAG (W) |
Lewis (L) |
Fischer (F) |
Irish (I) |
DA (D) |
Statistical comparisons (2) |
| Competitive Fighting | ||||||
| Bite & Kick Attack Offensive Sideways |
0 0 |
0 0 |
0 0 |
30 80 |
10 40 |
I>>L; I>>F; I>>W; D>L; D>F; D>W |
| Shock-Induced Fighting (3) | ||||||
| Boxing - male Boxing - female Boxing - both sexes |
20 0 10 |
40 0 20 |
20 0 10 |
100 80 90 |
100 60 80 |
I>W; D>W; I>F; D>F I>F; I>W; D>W I>>F; I>>W; I>>L; D>>F; D>>W; D>L |
| Restraint Resistance (4) Animals not isolated |
||||||
| Vocalization Struggling Biting |
30 30 0 |
30 40 0 |
71 86 43 |
50 50 0 |
0 0 0 |
F>>D; I>D F>>D; I>D; L>D; F>W |
| Test & Behavior | WAG (W) |
Lewis (L) |
Fischer (F) |
Irish (I) |
DA (D) |
Statistical comparisons (2) |
| Restraint Resistance (4) Animals isolated |
||||||
| Vocalization Struggling Biting |
40 50 10 |
30 50 10 |
88 88 75 |
100 100 78 |
50 50 0 |
I>>L; I>>W I>D; F>L I>W; I>L; I>D I>>D; I>>L; I>>W; F>>D; F>>L; F>>W |
| Isolation-induced Fighting (5) | ||||||
| Bite & Kick Attack Offensive Sideways |
0 10 |
70 60 |
86 86 |
30 40 |
40 60 |
F>>W; L>>W F>I; D>F F>>W; L>W; D>W |
(1) High levels of aggression indicated by bold italics.
(2) Comparisons by Fisher's Exact test for 2 x 2 Contingency Table. p < .05 indicated by >; p < .01 indicated by >>.
(3)Males showed significantly more boxing than females (p = .03 by sign test).
(4) Differences between isolated and unisolated males significant by Chi Square test (X²=8.3; p < .01 for biting; X²=5.2 and 6.1; p < .05 for struggling and vocalization respectively.
(5) Data from home rats only. Intruders did not attack.
| |
|
|