Abstract
Summary
1. Adult domestic Norway rats were found to accept ANTU when mixed with the stock diet in concentrations at least as high as 10%. In all concentrations from 0.1% to 10% inclusive the ANTU-poisoned food killed 100% of the rats, Lower concentrations of ANTU-poisoned food gave a 100% survival.
2. When fed sublethal concentrations of ANTU food from 0.05%) to 0.005% inclusive for 14 days, the rats developed a marked tolerance and refusal. Lower concentrations failed to produce either.
3. In some rats the tolerance disappeared at the end of 16 days and was almost imperceptible in all of the rats at the end of 30 days.
4. The refusal decreased after 16 days, though in some animals it was definitely present even at the end of 30 days.
Get full access to this article
View all access options for this article.