| lead concentrations in sediments and blue-winged teals (anas discors) from el palmar state reserve, yucatan, mexico. | reserve regulations at el palmar state reserve, yucatan, mexico, prohibit the use of lead (pb) shot, but hunters continue to use it, and no enforcement is implemented. pb was quantified in sediments and in blue-winged teal anas discors. no shot pellets were found in the sediment samples, nor were differences in sediment pb concentrations observed within the reserve between popular hunting sites and those no longer used for hunting. however, there were differences between the hunting sites and se ... | 2013 | 23775175 |