Anderson J M, Peterson M R
Science. 1969 Apr 25;164(3878):440-1. doi: 10.1126/science.164.3878.440.
When brook trout are exposed for 24 hours to sublethal doses of DDT, the cold-blocking temperature for a simple reflex, which shows lability related to thermal history, is altered in a way suggesting that DDT is aflecting the thermal acclimation mechanism. Sublethal dosage of DDT also prevents the establishment of a visual conditioned avoidance response.