trace elements in lesser scaup (aythya affinis) from the mississippi flyway.previous research reported that concentrations of selenium in the livers of 88-95% of lesser scaup from locations in lake erie, lake st. clair, and lake michigan, usa were either elevated (10-33 microg/g dry weight [dw]) or in the potentially harmful range (> 33 microg/g dw). in order to determine the geographic extent of these high selenium concentrations, we collected lesser scaup in louisiana, arkansas, illinois, minnesota, wisconsin, and manitoba and analyzed the livers for 19 trace elements ...201312739856
hepatic element concentrations of lesser scaup (aythya affinis) during spring migration in the upper midwest.high concentrations of some hepatic elements might be contributing to the decline of the continental lesser scaup (aythya affinis) population. we evaluated hepatic element concentrations of male and female lesser scaup collected from the upper midwest (iowa, minnesota, north dakota, and south dakota) during the 2003 and 2004 spring migrations. we measured concentrations of 24 elements in livers of 117 lesser scaup. we found that only selenium concentrations were at levels (>3.0 μg/g wet weight [ ...201120803199
relationships of cadmium, mercury, and selenium with nutrient reserves of female lesser scaup (aythya affinis) during winter and spring migration.trace elements may have important effects on body condition of ducks during spring migration, because individuals are experiencing energetically costly events (e.g., migration, nutrient reserve accumulation, pair formation, feather molt, and ovarian follicle development). we examined relationships among hepatic cadmium, mercury, and selenium concentrations (microg/g dry wt) and nutrient reserves (lipid, protein, and mineral) of female lesser scaup (aythya affinis) during winter and spring migrat ...200717373516
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