July 16, 2017

Download Atlantic Salmon Ecology by Øystein Aas, Anders Klemetsen, Sigurd Einum, Jostein Skurdal PDF

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 an incredible activities fishing and more and more because the significant farmed species in lots of nations worldwide.Atlantic Salmon Ecology is a landmark ebook, either scientifically vital and visually beautiful. Comprehensively overlaying all significant points of the connection of the Atlantic salmon with its atmosphere, chapters contain information of migration and dispersal, copy, habitat necessities, feeding, development premiums, pageant, predation, parasitsm, inhabitants dynamics, results of panorama use, hydro strength improvement, weather swap, and exploitation. The publication closes with a precis and consider attainable destiny learn directions.Backed by way of the Norwegian study Council and with editors and members widely recognized and revered, Atlantic Salmon Ecology is a necessary 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 natural world division group of workers and regulatory our bodies. Libraries in all universities and study institutions the place those matters are studied and taught must have copies of this significant publication.Comprehensive and updated insurance of Atlantic SalmonAtlantic Salmon is likely one of the world's so much commercially very important speciesBacked through the Norwegian learn CouncilExperienced editor and the world over revered members

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Extra resources for Atlantic Salmon Ecology

Sample text

Adult Atlantic salmon returning to coastal waters usually remain near the surface (1–5 m depth), but occasionally dive to greater depths. They may be sampling the water column for olfactory cues associated with thermal stratification, which they then use for orientation purposes (Westerberg 1982; Døving et al. 1985). When river conditions are favourable, most fish pass through estuaries from sea water to fresh water within a matter of a few hours (Solomon & Sambrook 2004; Thorstad et al. 1998).

8 Fishways of various designs have been provided in many river systems to facilitate upstream passage of Atlantic salmon past power stations and other migration barriers. However, they may not always be successful in facilitating migration, and the fishway itself may act as an obstacle and delay upstream progress. Photo: Eva B. Thorstad. more important in stimulating upstream migration in smaller rivers (Solomon et al. 1999) and past challenging migration barriers. To allow a successful passage by Atlantic salmon past any particular riffle, waterfall or other migration barrier, water discharge often has to be within a site-specific range (Jensen et al.

2 Marine post-smolt migration The migration of Atlantic salmon smolts through estuaries, from fresh water to the sea, is characterised by active swimming and is a continuous movement, usually with no apparent period of acclimation to adjust to saltwater osmotic and ionic conditions (Moore et al. 1998; Lacroix et al. 2005). Smolts may not need a period of acclimatisation because they have previously, while still in fresh water, become modified physiologically to tolerate saline conditions (Hoar 1988).

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