Literaturdatenbank
Literaturdatenbank |
|
 |
|
Luiselli, L., Capula, M., Burke, R. L., & Rugiero, L. , Evidences of population declines in central italian populations of testudo hermanni hermanni? Unpublished paper presented at Atelier international sur la gestion et la restauration des populations et habitats de la Tortue d’Hermann / International workshop on the management and restoration of Hermann’s tortoise populations and habitats.
Added by: Admin (06 Jan 2014 18:24:54 UTC) |
| Resource type: Conference Paper BibTeX citation key: Luiselli2013 View all bibliographic details  |
Categories: General Keywords: Habitat - habitat, Schildkröten - turtles + tortoises, Südeuropa - Southern Europe, Testudinidae, Testudo hermanni Creators: Burke, Capula, Luiselli, Rugiero Collection: Atelier international sur la gestion et la restauration des populations et habitats de la Tortue d’Hermann / International workshop on the management and restoration of Hermann’s tortoise populations and habitats |
Views: 4/628
Views index: 16% Popularity index: 4% |
| Abstract |
|
Testudo hermanni Testudinidae Several populations of Hermann's tortoise have been studied in Latium (central Italy) in order to analyze different aspects of their ecology, however none of them has been monitored for long-term as it has been done for snake populations in the same geographic territory (e.g. See Reading, Luiselli et al., 2010, Biology Letters; Luiselli, Madsen et al., 2011, Ecological Research; Rugiero, Milana et al., 2012 and 2013, both in Acta Oecologica). Therefore, we do not have direct evidence of demographic changes/trends in local tortoise populations because of this lack of long-term datasets. Hence, the only way for assessing a population trend in our tortoises is to analyze in a transversal way our short-term datasets. In order to do so, we present in this talk the across-years comparative datasets on local abundance of same populations of tortoises established through regularly repeated transects (and wih Distance statistical procedure) and time-constrained VES. The estimates of tortoise counts based on these procedures may be more prone to biases and artefacts than long-term capture-mark-recapture procedures, and therefore the outcoming data must be taken on a cautelative way. However, overall, it seems that a declining trend can be found in the local tortoise populations, despite with variable intensity among the different areas. In the natural reserve of Marturanum, for instance, the tortoises still appear very abundant.
Added by: Admin |