Lead exposure affects the immune system of wild birds and, in small doses does not kill, but it affects their level of circulating antibodies and upsets their intestinal microbiota, according to a study led by researchers from the National Research Council (CSIC).
The results of the research have been published in the journal Environmental Science and Technology, said the lead poisoning or lead poisoning, in the red partridge, animal model work, upset the intestinal microbiota, increased phagocytic capacity of blood and reduced levels of circulating antibodies and lysozyme, a protein that forms part of the defense against pathogens, among other disorders.
The researcher of the Research Institute of Hunting Resources CSIC Rafael Mateo explained that the lead poisoning is a major poisoning in wild birds and ammunition Lead the main cause.
“Lead poisoning occurs when birds ingest spent shot and remains of lesser bullets used in big game hunting. Among the species most at risk of lead poisoning include waterfowl, but also raptors, especially those with more scavengers habits, because they can feed on prey shot at, “added the researcher of this joint CSIC and University of Castilla-La Mancha and the regional government of Castilla-La Mancha.
In addition, researchers have noted changes in the levels of antioxidants and red coloring Partridge eye ring. According to study, this process depends on the time of year, because it could be caused by the need to increase the color in spring for breeding purposes.
Thus, Mateo has indicated that the study results offer “more complete immune response” and that these effects on defenses can affect the ability to respond to pathogens, so it must be taken “into account” to the risk of emerging diseases vision, especially in For endangered species, such as migratory birds and birds of prey, which “have high exposures to lead ammunition in certain areas of Spain”.
Finally, to prevent lead poisoning, the authors study recommend phasing out the use of lead ammunition in all habitats and hunters opt for less toxic alternatives such as steel in the case of the copper shot and bullets.
(EuropaPress)
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