Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-26T11:19:28.498Z Has data issue: false hasContentIssue false

Post-breeding migrations of newts (Triturus cristatus and T. marmoratus) with contrasting ecological requirements

Published online by Cambridge University Press:  01 July 2000

R. Jehle
Affiliation:
Institute of Zoology, University of Vienna, Althanstr. 14, A-1090 Vienna, Austria
J. W. Arntzen
Affiliation:
Universidade do Porto, Unidade de Génetica Animal e Conservação, Campus Agràrio de Vairão, Rua de Monte, Crasto, 4480 Vila do Conde, Portugal
Get access

Abstract

Two newt species with contrasting ecological requirements (Triturus cristatus and T. marmoratus) were radio-tracked after leaving a shared breeding pond in western France. Movements of 30 individuals were recorded over 491 days. During the first terrestrial night, the newts migrated with high directionality up to 137 m to their refuges. Burrows of small mammals were among the favourite refuges. Movements after the first night were mostly underground and over shorter distances (< 6.8 m). Sixty-four per cent of all tracked newts stayed within 20 m of the pond edge, and migrations were recorded up to 146 m away from the pond. Both species preferred areas with bushes, hedgerows and trees, and avoided pastures and open areas. Migration in the direction of a habitat type characterized by trees and underground shelters was favoured over migrations in other directions. A clear terrestrial niche separation between the two newt species was not observed. The results are discussed in relation to previous findings that T. cristatus supersedes T. marmoratus as a consequence of anthropogenic change to the terrestrial environment, affecting the species differentially.

Type
Research Article
Copyright
2000 The Zoological Society of London

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)