Changes in the fish community of the upper Tiber River after construction of a hydro-dam

Submitted: 24 September 2013
Accepted: 14 November 2013
Published: 25 February 2014
Abstract Views: 3537
PDF: 1018
HTML: 1088
Publisher's note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.


The aim of this study was to assess whether the composition of the fish community in the upper Tiber River Basin changed after the construction of the Montedoglio Reservoir by comparing the composition of the fish assemblages before and after the creation of this structure. Data collected in 2010 from three different sampling sites (one above and two downstream from the dam) were compared with those recorded during previous studies (conducted in 1992) to reveal the change in fish community. In each sampling site, a census of the fish community was conducted, the estimated number of fish of each species was calculated and fish condition was assessed by relative weight. The structure of the communities downstream from Montedoglio Reservoir changed radically after the construction of the barrier, while the fish community upstream from the barrier appeared unaffected by the dam. The release of hypolimnetic cold water from the reservoir, over time, has caused a progressive decreasing of water temperature of the Tiber River. Montedoglio Reservoir and the release of hypolimnetic water had a marked impact on the fish community of the Tiber River because it interrupted the typical longitudinal zonation of the species in the river. In addition, without effective management, this reservoir can pose an increased threat to the native fish species, since it is a source of diffusion of various exotic species.



PlumX Metrics


Download data is not yet available.


How to Cite

Franchi, Elisabetta, Antonella Carosi, Lucia Ghetti, Daniela Giannetto, Giovanni Pedicillo, Laura Pompei, and Massimo Lorenzoni. 2014. “Changes in the Fish Community of the Upper Tiber River After Construction of a Hydro-Dam”. Journal of Limnology 73 (2).

List of Cited By :

Crossref logo