New paper: eggshell thickness from bearded vulture eggs from the Pyrenees decreased abruptly after 2004

egg-shell-web

The authors suggest this may be related to extrinsic factors such as food availability and quality – either due to density-dependent competition for food resources or the impact of the sudden changes in food availability due to sanitary regulations between 2006 and 2011 – now fortunately reversed with scavenger-friendly policies in place again.

The good news was that organochlorine pesticides and polychlorinated biphenyls levels were found in low levels, suggesting the impacts of this contamination seem to be a thing of the past.

You can download the full paper below.

Photo: VCF

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Decrease in eggshell thickness from bearded vulture eggs from the Pyrenees
Hernández et al 2018 Science of the Tota
Adobe Acrobat Document 513.3 KB

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