Table 3.
Adolescent | Adult | |||||
---|---|---|---|---|---|---|
Age (weeks) | Weight (grams) mean±SEM |
% of published standards for this strain |
Age (weeks) | Weight (grams) mean±SEM |
% of published standards for this strain |
|
Food training | Approximately 5 | 153±4 | 122 | Approximately 10 | 329±4 | 94 |
Acquisition of cocaine self-administration | 6 | 186±4 | 106 | 11 | 331±5 | 86 |
Early self-administration | 7 | 202±4 | 91 | 12 | 320±4 | 78 |
Late self-administration | 10 | 251±6 | 72 | 15 | 315±4 | 68 |
Extinction and reinstatement | 12 | 262±7 | 63 | 17 | 314±6 | Standard n/a |
Published standards obtained from Charles River Laboratories, http://www.criver.com/SiteCollectionDocuments/rm_rm_c_CD_IGS_rat_weight_chart.pdf