| lead toxicity in captive and wild mallards (anas platyrhynchos) in spain. | forty captive mallards (anas platyrhynchos), of both sexes, were separated into five groups and dosed with lead shot via oral intubation; one group was used as a control. lead dosage differed in terms of shot number and size, as well as administration time. one hundred and thirty-five wild mallards were trapped between 1998 and 2001 in the boada and nava lagoons near the canal de castilla, in the spanish province of palencia. radiologic techniques (ventrodorsal and lateral views) were used to de ... | 2010 | 20688691 |