Kagervall, Anders
- Institutionen för vilt, fisk och miljö, Sveriges lantbruksuniversitet
Sammanfattning
P>Habitat mapping along 85 km of river was related to juvenile (15 years of electric fishing) and smolt (3 years of screw-trapping) abundance data to estimate salmon, Salmo salar L., and sea trout, Salmo trutta L., smolt production in the River Savaran, northern Sweden. Spawning site selection by radio-tagged salmon (n = 12) and sea trout (n = 4) was also assessed. Fifty-one hectares of potential spawning and nursery habitat was found in the main stem river, representing 25% of the total river area. These areas were estimated to yield 1300-7580 salmon and 630-3540 sea trout smolts based on juvenile densities, equating with 3 years of screw-trap data (2990-5080 salmon and 680-2520 trout smolts, respectively). A hypothetical maximum production of about 19 900 salmon smolts was predicted for the river at a density of 40, 0+ salmon 100 m-2. Tracking adults during the spawning period identified optimal and potential reproductive areas.
Nyckelord
abundance; parr; radio tracking; salmonid; spawning habitat
Publicerad i
Fisheries Management and Ecology
2010, volym: 17, nummer: 5, sidor: 446-453
Utgivare: WILEY-BLACKWELL
SLU författare
Rivinoja, Peter
- Institutionen för vilt, fisk och miljö, Sveriges lantbruksuniversitet
- Institutionen för vilt, fisk och miljö, Sveriges lantbruksuniversitet
UKÄ forskningsämne
Fisk- och akvakulturforskning
Publikationens identifierare
- DOI: https://doi.org/10.1111/j.1365-2400.2010.00743.x
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/47856