title: DDT thins shells of eggs from mallard ducks maintained on ad libitum or controlled-feeding regimens.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002118:Calcium / Q000032:analysis; D003634:DDT / Q000008:administration & dosage / Q000494:pharmacology*; D004026:Dieldrin / Q000494:pharmacology; D004032:Diet; D004305:Dose-Response Relationship, Drug; D004372:Ducks; D004528:Egg Shell / Q000737:chemistry; D005260:Female
chemical_list: D003634:DDT; D004026:Dieldrin; D002118:Calcium