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Developmental effects of field maternal transfer of lead on mallard ducklings

AutorMateo, Rafael ; López-Antia, Ana ; Martínez-Haro, Mónica ; Espín, Silvia; Vidal, Dolors ; Ortiz-Santaliestra, Manuel E.
Fecha de publicación2012
Citación61st WDA/10th EWDA (2012)
ResumenThe prevalence of Pb shot ingestion in mallards (Anas platyrhynchos) from the Ebro delta (NE Spain) was 30% before the Pb shot ban in 2001, and it is still 14% in 2011-12. Pb can produce sublethal effects on several biological functions in birds, including the reproduction and the nestling development. Here we have studied the effects of the maternal transfer of Pb through the egg to the duckling under field conditions. Eggs of mallard ducks (n=44) were collected from independent nests and incubated artificially. Pb levels were measured in eggshells and blood of ducklings, and these were correlated with δ-ALAD activity, plasma biochemistry, oxidative stress biomarkers, cellular (PHA reaction) and humoral (SRBC agglutination) immune functions, and results of three neurobehavioral tests performed at different days of age. Ducklings with blood Pb levels above 180 ng/ml died during the first 7 days post hatching. Eggshell Pb levels were significantly correlated with blood Pb levels in ducklings at day 3, but not at day 28. δ-ALAD activity and cellular immune function were negatively correlated with Pb levels in eggshell and blood of mallard ducklings. The rest of the studied parameters were not correlated with blood or eggshell Pb levels. The use field eggs may give more realistic results than experimental studies, because it permits to evaluate field Pb exposures in which other toxicants may be also present.
DescripciónResumen del trabajo presentado a la 61st Wildlife Disease Association and 10th Biennial European Wildlife Disease Association: "convergence in wildlife health", celebrada en Lyon (Francia) del 23 al 27 de julio de 2012.
Aparece en las colecciones: (IREC) Comunicaciones congresos
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