By Øystein Aas, Anders Klemetsen, Sigurd Einum, Jostein Skurdal
The Atlantic salmon is without doubt one of the such a lot prized and exploited species around the world, being on the centre of a tremendous activities fishing and more and more because the significant farmed species in lots of nations worldwide.Atlantic Salmon Ecology is a landmark booklet, either scientifically very important and visually beautiful. Comprehensively overlaying all significant elements of the connection of the Atlantic salmon with its surroundings, chapters contain information of migration and dispersal, replica, habitat requisites, feeding, progress charges, pageant, predation, parasitsm, inhabitants dynamics, results of panorama use, hydro strength improvement, weather switch, and exploitation. The booklet closes with a precis and consider attainable destiny learn directions.Backed via the Norwegian study Council and with editors and members well known and revered, Atlantic Salmon Ecology is a vital buy for all these operating with this species, together with fisheries scientists and executives, fish biologists, ecologists, physiologists, environmental biologists and aquatic scientists, fish and flora and fauna division team of workers and regulatory our bodies. Libraries in all universities and learn institutions the place those topics are studied and taught must have copies of this significant publication.Comprehensive and up to date assurance of Atlantic SalmonAtlantic Salmon is likely one of the world's so much commercially vital speciesBacked by means of the Norwegian learn CouncilExperienced editor and the world over revered individuals
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Autumn smolt (sometimes termed pre-smolt) migrations are reported from both North American and European rivers (Riddell & Leggett 1981; Huntingford et al. 1992), but these fish may reside in fresh water or low salinity areas in the lower and tidal reaches of the river instead of migrating to sea. They seem not to be physiologically adapted to permanently enter the marine environment (Riley et al. 2008), and the drivers and reasons for such autumn migration are not presently understood. As downstream migration in the autumn has been studied in only a few rivers, this migration pattern may be more widespread than previously recognised.
2007). At some power stations, fish may be further delayed if they must pass an associated dam and fishway (Chanseau & Larinier 1998; Karppinen et al. 2002). River regulation sometimes reduces water discharge on certain river sections, for example downstream of power station or fish farm intakes, or downstream of interbasin water transfers. River sections with reduced water discharge may extend over many kilometres, and the reduction in water discharge may be considerable. Salmon may have problems finding and entering such river sections, and once they have entered, they may be further delayed in passing through them (Lundqvist et al.
Delays in such discharges may delay migration for up to several weeks (Rivinoja et al. 2001; Thorstad et al. 2005; Scruton et al. 2007). At some power stations, fish may be further delayed if they must pass an associated dam and fishway (Chanseau & Larinier 1998; Karppinen et al. 2002). River regulation sometimes reduces water discharge on certain river sections, for example downstream of power station or fish farm intakes, or downstream of interbasin water transfers. River sections with reduced water discharge may extend over many kilometres, and the reduction in water discharge may be considerable.
Atlantic Salmon Ecology by Øystein Aas, Anders Klemetsen, Sigurd Einum, Jostein Skurdal