A model was devised to examine predicted residue concentrations in the
fat of growing pigs under various exposure scenarios. A single body f
at pool and transfer rates proportional to concentrations were assumed
. When exposure was a constant concentration in the diet, predicted co
ncentrations in fat were maximum at about 30 kg body weight and then d
eclined slowly until the typical 100 kg slaughter weight was reached.
Declines in concentrations of recalcitrant compounds in fat of animals
moved to a clean environment can be accounted for by dilution in the
expanding fat pool. Model simulantions suggest that alterations in fee
ding and management to produce leaner animals may lead to greater tran
smission of residues to humans.