Carranza Lab
Animal Biodiversity and Evolution Programme
Institut de Biologia Evolutiva (CSIC-UPF)
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Conservation of the Montseny brook newt (Calotriton arnoldi)


The Montseny brook newt (Calotriton arnoldi) was described in 2005 by S. Carranza and Felix Amat (see Carranza & Amat, 2005). This newt is only found in 7 rivers, all within the Natural Park of "El Montseny" in Catalonia, NE Spain. As a result of its restricted distribution (less than 40 square kilometers) we have been involved in several projects in order to have a much better understanding of its origin, distribution, demography, ecology and biology. This knowledge is basic to develop a propper conservation plan for the protection of this species. One of the outcomes of the project is that, after visiting more than 200 rivers and streams, we have been able to show that the species is just restricted to a very particular area of the Natural Park, characterized by its geology. Other results based on capture-recapture experiments confirm that the species is probably fully aquatic (hardly every leaves the water) and that it moves very little within the stream, the same specimens being found in the same place or very near. These projects are funded by the Diputació de Barcelona and the Generalitat de Catalunya.In parallel to the investigations carried out in the field, the Montseny brook newt is part of a very successful captive breeding program carried out by the Torreferrussa Wildlife Recovery Centre. See also this video about the captive program.

Ongoing work related to this project

  • Distribution and abundance of Calotriton arnoldi
  • Demography of Calotriton arnoldi
  • Genetic and morphologic analysis of the populations of Calotriton arnoldi


  • Felix Amat (Museu de Ciencies Naturals de Granollers, Barcelona, Spain)