No es una noticia, es un artículo que me ha gustado bastante y lo cuelgo aquí, si no se puede lo quito.

Abstract

The Pyrenean brown bear (Ursus arctos) population is considered as one of the most seriously threatened with extinction
in Western Europe. To assess its viability and possible needs of augmentation, we develop deterministic and stochastic stagestructured
demographic models. The deterministic model reveals that a bear population cannot have a high annual growth rate
and is particularly sensitive to breeder survival. High demographic parameters appear to be crucial to population persistence,
especially for a small population that remains vulnerable to demographic and environmental stochasticities. The Pyrenean
population cannot therefore be considered as viable. Successful conservation strategies for this population would require
releasing more bears in both sub-populations in the near future. To cite this article: G. Chapron et al., C. R. Biologies 326
(2003).

http://www.carnivoreconservation.org/files/guillaume/comptes_rendus_biol_2003_ours.pdf