Característiques poblacionals de la tortuga mediterrània Testudo hermanni hermanni Gmelin a la serra de l'Albera (Reptilià: Testudinidae)

Authors

  • Alberto Bertolero Badenes
  • Joan Budó
  • Nil Torres

Abstract

During 2019, the population of the Hermann's tortoise in the Albera Mountains (Girona, Catalonia) has been censed using the capturemark- recapture method. The total sampled area was 95.7 ha. Furthermore, demographic parameters such as sex-ratio and age class data of the tortoises as well as biometric measurements have been collected. In total, 174 tortoises have been found throughout the sampled parcels and the tortoise density estimation (combining age and sex classes) has varied between 0.7 and 11.5 tortoises/ha. The sex-ratio has shown a bias to the females (1.0M:1.6F) and the adult age class represented the 85.6 % of the population. The adult tortoises show a high sexual dimorphism according to size, being females bigger than males (16 % larger -in straight carapace length- and 39 % heavier). The evaluation of demographic parameters has allowed the identification of some zones with a good population density. These zones could be safe areas and be used as an expansion nucleus for the species. Repeating the census over the coming years could become an appreciated tool to determine the evolution of Albera's population.

Downloads

Download data is not yet available.

Downloads

Published

2021-03-04

Issue

Vol. 84: 2020

Section

Gea, Flora et Fauna

License

The intellectual property of articles belongs to the respective authors.

On submitting articles for publication to the journal Butlletí de la Institució Catalana d'Història Natural authors accept the following terms:

  1. Authors assign to Institució de la Societat Catalana d’Història Natural (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Butlletí de la Institució Catalana d'Història Natural.
  2. Authors answer to Institució de la Societat Catalana d’Història Natural for the authorship and originality of submitted articles.
  3. Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.
  4. Institució de la Societat Catalana d’Història Natural declines all liability for the possible infringement of intellectual property rights by authors.
  5. The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.
  6. The journal Butlletí de la Institució Catalana d'Història Natural is not responsible for the ideas and opinions expressed by the authors of the published articles.