Sea‐ranching of brown trout, Salmo trutta L.
Identifieur interne : 000428 ( Istex/Corpus ); précédent : 000427; suivant : 000429Sea‐ranching of brown trout, Salmo trutta L.
Auteurs : N. Jonsson ; B. Jonsson ; L. P. HansenSource :
- Fisheries Management and Ecology [ 0969-997X ] ; 1994-04.
English descriptors
Abstract
Abstract In total, 8211 1‐year‐old and 14839 2‐year‐old hatchery‐reared brown trout, Salmo trutta L., from 11 stocks were released at the mouth of the River Imsa, southwestern Norway. The recapture rates and total estimated yield were higher for 2‐ than 1‐year‐old trout, although recapture rates varied between years of release and stocks. The recapture rate increased with mean individual weight at time of release. Total estimated yield from the individual groups of 1+ trout ranged from 2 to 20 kg per 1000 trout released and for 2+ trout between 11 and 250 kg per 1000 fish released. In all cases, yields were lower than the economic break‐even yield. Most fish were recaptured the year of release (89.2% of 2+ and 76.2% of 1+ trout). Almost 31% of the recaptures were caught at sea and 69% in fresh water; 95.8% of the latter were taken in the River Imsa trap.
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DOI: 10.1111/j.1365-2400.1970.tb00007.x
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ISTEX:D4014198D9FA7575E3ABAEDEFD1389CECA4A02D3Le document en format XML
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Jonsson</name><affiliation><mods:affiliation>Norwegian Institute for Nature Research, Trondheim, Norway</mods:affiliation></affiliation><affiliation><mods:affiliation>Norwegian Institute of Nature Research, Tungasletta 2, N‐7005 Trondheim, Norway.</mods:affiliation></affiliation></author><author><name sortKey="Jonsson, B" sort="Jonsson, B" uniqKey="Jonsson B" first="B." last="Jonsson">B. Jonsson</name><affiliation><mods:affiliation>Norwegian Institute for Nature Research, Trondheim, Norway</mods:affiliation></affiliation></author><author><name sortKey="Hansen, L P" sort="Hansen, L P" uniqKey="Hansen L" first="L. P." last="Hansen">L. P. 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The recapture rates and total estimated yield were higher for 2‐ than 1‐year‐old trout, although recapture rates varied between years of release and stocks. The recapture rate increased with mean individual weight at time of release. Total estimated yield from the individual groups of 1+ trout ranged from 2 to 20 kg per 1000 trout released and for 2+ trout between 11 and 250 kg per 1000 fish released. In all cases, yields were lower than the economic break‐even yield. Most fish were recaptured the year of release (89.2% of 2+ and 76.2% of 1+ trout). Almost 31% of the recaptures were caught at sea and 69% in fresh water; 95.8% of the latter were taken in the River Imsa trap.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>N. 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The recapture rate increased with mean individual weight at time of release. Total estimated yield from the individual groups of 1+ trout ranged from 2 to 20 kg per 1000 trout released and for 2+ trout between 11 and 250 kg per 1000 fish released. In all cases, yields were lower than the economic break‐even yield. Most fish were recaptured the year of release (89.2% of 2+ and 76.2% of 1+ trout). 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The recapture rates and total estimated yield were higher for 2‐ than 1‐year‐old trout, although recapture rates varied between years of release and stocks. The recapture rate increased with mean individual weight at time of release. Total estimated yield from the individual groups of 1+ trout ranged from 2 to 20 kg per 1000 trout released and for 2+ trout between 11 and 250 kg per 1000 fish released. In all cases, yields were lower than the economic break‐even yield. Most fish were recaptured the year of release (89.2% of 2+ and 76.2% of 1+ trout). 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The recapture rates and total estimated yield were higher for 2‐ than 1‐year‐old trout, although recapture rates varied between years of release and stocks. The recapture rate increased with mean individual weight at time of release. Total estimated yield from the individual groups of 1+ trout ranged from 2 to 20 kg per 1000 trout released and for 2+ trout between 11 and 250 kg per 1000 fish released. In all cases, yields were lower than the economic break‐even yield. Most fish were recaptured the year of release (89.2% of 2+ and 76.2% of 1+ trout). Almost 31% of the recaptures were caught at sea and 69% in fresh water; 95.8% of the latter were taken in the River Imsa trap.</abstract><subject lang="en"><genre>keywords</genre><topic>ranching</topic><topic>trout</topic><topic>yield</topic></subject><relatedItem type="host"><titleInfo><title>Fisheries Management and Ecology</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0969-997X</identifier><identifier type="eISSN">1365-2400</identifier><identifier type="DOI">10.1111/(ISSN)1365-2400</identifier><identifier type="PublisherID">FME</identifier><part><date>1994</date><detail type="volume"><caption>vol.</caption><number>1</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>67</start><end>76</end><total>10</total></extent></part></relatedItem><identifier type="istex">D4014198D9FA7575E3ABAEDEFD1389CECA4A02D3</identifier><identifier type="DOI">10.1111/j.1365-2400.1970.tb00007.x</identifier><identifier type="ArticleID">FME7</identifier><accessCondition type="use and reproduction" contentType="copyright">1994 Blackwell Science Ltd</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Blackwell Publishing Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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