Naslov
Prvo ihtiološko istraživanje rijke Bele (Sliv rijek Soče - Zapadna Slovenija)
(First ichthyologic investigation of river Bela (Soca river basin - West Slovenia)

Autori
Šumer, Suzana ; Povž, Meta ; Leiner, Srećko

Izvornik
Journal of freshwater biology (0970-9517) Quaderni ETP (2004), 33; 59-65

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
slatkovodne rib; dinaika populacija; rasprostranjenost; starosna struktura; prirast
(Freshwater fish; population dynamics; distribution; age structure; growth rate)

Sažetak
Population density, standing crop, and age structure together with growth rate and condition factor for the fish fauna in the River Bela, the tributary of the Nadiža (Sdriatic Sea basin) in Slovenia were estimated. The aim of the research was to implement proposal for further fishery management based on some physical and chemical water characteristics, amount of the fish food available, water quality, and fish population dynamics. The study was performed in September and March 1998/99). Four species/subspecies as well as hybrid trout (Salmo trutta x S. marmoratus) were registered. Total fish density was 13, 567 ind/ha (biomas 329 kg/ha) in September and only 3, 500 ind/ha (151 kg/ha) in March. The abundance of young specimens (<2)dominated in both seasons. The highest average condition coefficients were estimated among Cottus gobio populations (4.5-13.5 cm, 0.8-32 g), followed by Oncorhynchus mykiss (age group 0-5), the hybrid (0-8), Salmo marmoratus (0-3) and Salmo trutta (1-7).

Izvorni jezik
Engleski

Znanstvena područja
Biologija

Napomena
Rad je napisan na engleskom uz talijaski sažetak. Datoteka je izvorno kod prvog autora (Šumer Suzana).

POVEZANOST RADA