Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Is migration of hatchery-raised salmonids affected by ration size?
Karlstad University, Faculty of Social and Life Sciences, Department of Biology.
2008 (English)Conference paper, Published paper (Refereed)
Abstract [en]

To compensate for loss of spawning and rearing areas as well as mortality of downstream-migrating smolts, hatchery-raised smolts are stocked in many regulated rivers. The hatchery-reared smolts are larger and have a higher condition factor than their wild counterparts. The aim of this study was to investigate if the migration rate of stocked salmonids could be altered by manipulating the feeding conditions in hatcheries. Experiments were performed in 2006 and 2007 on lake-migrating salmon (Salmo salar) and trout (Salmo trutta) from the River Klarälven, western Sweden. Fish were either fed normal rations, based on recommendations from the fish-farming industry, or reduced rations (15 %). In 2006 salmon fed reduced food rations migrated faster to the lake than salmon given normal rations. Ration size, however, did not affect the percentage of fish that migrated. . In 2007 the proportion of salmon that migrated was higher for the fish fed reduced rations than for the fish fed normal rations. For trout the proportion of migrants was not affected by ration size. Instead, fish fed low rations migrated to the lake faster than the trout fed normal rations. Standard metabolic rate was also measured for resident and migrant salmon and trout. We found that standard metabolic rate was higher for trout migrants than for trout residents, whereas no difference was found for resident and migrant salmon

Place, publisher, year, edition, pages
2008.
Keyword [en]
brow trout, Atlantic salmon, migration, Standard Metabolic Rate
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-20579OAI: oai:DiVA.org:kau-20579DiVA, id: diva2:594244
Conference
NoWPaS, Roskilde, Denmark
Available from: 2013-01-21 Created: 2013-01-21 Last updated: 2013-01-21

Open Access in DiVA

No full text in DiVA

Authority records BETA

Lans, Linnea

Search in DiVA

By author/editor
Lans, Linnea
By organisation
Department of Biology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 20 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf