The fish fauna in the Montedoglio reservoir (Tuscany, Italy) five years after its creation

• Autorzy: Lorenzoni M. , Carosi A. , Giovinazzo G. , Petesse M.L. , Mearelli M.
• Języki publikacji: EN

Abstrakty

EN

To assess the current ecosystem status of Montedoglio Reservoir and surrounding waters, the fish fauna has been analysed in 1993, about five years after the first experimental impoundment. Total number of 898 fishes of fifteen species have been collected of the total biomass of 117 kg. The most abundant species were pumpkinseed (Lepomis gibbosus), goldfish (Carassius auratus L.), bleak (Alburnus alburnus alborella De Fil.), largemouth bass (Micropterus salmoides Lac.), rudd (Scardinius erythrophthalmus L.), and chub (Leuciscus cephalus L.), while the three: Carp (Cyprinus carpio L.), goldfish, and largemouth bass accounted for the most biomass. Of the most common species, carp, chub, largemouth bass and rudd provided insight into population structure and growth. In 1992, a year of heavy spring rains and a rapid water exchange, a year-class abundance across all species was particularly poor. The results of water levels and outflows between 1992-1994 showed a high degree of instability of the system. It appeared to favour fish species depositing their eggs inshore (i.e. chub) and predators (i.e. largemouth bass), while species with life stages feeding on plankton or benthos were not favoured.

Słowa kluczowe

EN

fish fauna; Montedoglio reservoir; Tuscany; Italy; animal population; reservoir; Tiber River; aquatic environment; Lepomis gibbosus; Carassius auratus; Alburnus alburnus alborella; Micropterus salmoides; Scardinius erythrophthalmus; Leuciscus cephalus; Cyprinus carpio; hydrobiology

• Wydawca: -
• Czasopismo: International Journal of Ecohydrology and Hydrobiology
• Rocznik: 2005
• Tom: 05
• Numer: 2
• Opis fizyczny: p.135-146,fig.,ref.

Twórcy

autor

Lorenzoni M.

• Universita degli Studi di Perugia - Via Elce di Sotto, 06123 Perugia (Italy)

autor

Carosi A.

autor

Giovinazzo G.

autor

Petesse M.L.

autor

Mearelli M.