{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T23:40:34Z","timestamp":1790293234062,"version":"4.1.0"},"reference-count":47,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2013,1,13]],"date-time":"2013-01-13T00:00:00Z","timestamp":1358035200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Fish Diseases"],"published-print":{"date-parts":[[2013,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The impact of salmon lice on the survival of migrating <jats:styled-content style=\"fixed-case\">A<\/jats:styled-content>tlantic salmon smolts was studied by comparing the adult returns of sea\u2010ranched smolts treated for sea lice using emamectin benzoate or substance <jats:styled-content style=\"fixed-case\">EX<\/jats:styled-content> with untreated control groups in the <jats:styled-content style=\"fixed-case\">R<\/jats:styled-content>iver <jats:styled-content style=\"fixed-case\">D<\/jats:styled-content>ale in western <jats:styled-content style=\"fixed-case\">N<\/jats:styled-content>orway. A total of 143\u00a0500 smolts were released in 35 release groups in freshwater from 1997 to 2009 and in the fjord system from 2007 to 2009. The adult recaptures declined gradually with release year and reached minimum levels in 2007. This development corresponded with poor marine growth and increased age at maturity of ranched salmon and in three monitored salmon populations and indicated unfavourable conditions in the <jats:styled-content style=\"fixed-case\">N<\/jats:styled-content>orwegian <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>ea. The recapture rate of treated smolts was significantly higher than the controls in three of the releases performed: the only release in 1997, one of three in 2002 and the only group released in sea water in 2007. The effect of treating the smolts against salmon lice was smaller than the variability in return rates between release groups, and much smaller that variability between release years, but its overall contribution was still significant (<jats:italic>P\u00a0<\/jats:italic>&lt;<jats:italic>\u00a0<\/jats:italic>0.05) and equivalent to an odds ratio of the probability of being recaptured of 1.17 in favour of the treated smolts. Control fish also tended to be smaller as grilse (<jats:italic>P\u00a0<\/jats:italic>=<jats:italic>\u00a0<\/jats:italic>0.057), possibly due to a sublethal effect of salmon lice.<\/jats:p>","DOI":"10.1111\/jfd.12052","type":"journal-article","created":{"date-parts":[[2013,1,14]],"date-time":"2013-01-14T04:54:11Z","timestamp":1358139251000},"page":"249-260","source":"Crossref","is-referenced-by-count":66,"title":["Impact of early salmon louse, <i><scp>L<\/scp>epeophtheirus salmonis<\/i>, infestation and differences in survival and marine growth of sea\u2010ranched <scp>A<\/scp>tlantic salmon, <i><scp>S<\/scp>almo salar<\/i> L., smolts 1997\u20132009"],"prefix":"10.1111","volume":"36","author":[{"given":"O T","family":"Skilbrei","sequence":"first","affiliation":[{"name":"Institute of Marine Research Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B","family":"Finstad","sequence":"additional","affiliation":[{"name":"Norwegian Institute for Nature Research Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K","family":"Urdal","sequence":"additional","affiliation":[{"name":"R\u00e5dgivende Biologer AS Bredsg\u00e5rden, Bryggen Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G","family":"Bakke","sequence":"additional","affiliation":[{"name":"Institute of Marine Research Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F","family":"Kroglund","sequence":"additional","affiliation":[{"name":"Norwegian Institute for Water Research Grimstad Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R","family":"Strand","sequence":"additional","affiliation":[{"name":"Norwegian Institute for Nature Research Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,1,13]]},"reference":[{"key":"e_1_2_6_2_1","first-page":"5","article-title":"Connection between maturity, size, and age in fishes","volume":"40","author":"Alm G.","year":"1959","journal-title":"Reports of the Institute of Fresh\u2010water Research, Drottningholm"},{"key":"e_1_2_6_3_1","unstructured":"Anon. 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