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The results in this study suggest that there are steps that can be carried out to keep salmon lice under control even during years when the temperature facilitates a quick salmon lice development. The present work indicates that the use of cleaner fish can delay the time it takes adult female lice to reach 0.1 per salmon in the beginning of a production cycle. It suggests that the timing of cleaner fish deployment into salmon cages can influence its effectiveness in controlling salmon lice. It also gives caution to letting salmon lice develop unchecked, even at levels far below the current lice limit, because of the difficulties to control salmon lice when the external infection pressure is too high. This study took place during a rapid change in delousing methods, in an area with coordinated salmon production. Despite its exploratory nature, this study offers insights into the salmon lice fluctuations in relation to efforts aimed at controlling it.<\/jats:p>","DOI":"10.1111\/jfd.13080","type":"journal-article","created":{"date-parts":[[2019,9,11]],"date-time":"2019-09-11T05:28:47Z","timestamp":1568179727000},"page":"1573-1586","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["How are the salmon lice (<i>Lepeophtheirus salmonis<\/i> Kr\u00f8yer, 1837) in Atlantic salmon farming affected by different control efforts: A case study of an intensive production area with coordinated production cycles and changing delousing practices in 2013\u20132018"],"prefix":"10.1111","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6558-8923","authenticated-orcid":false,"given":"Lone Sunniva","family":"Jevne","sequence":"first","affiliation":[{"name":"Department of Biology Norwegian University of Science and Technology (NTNU) Trondheim Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1149-810X","authenticated-orcid":false,"given":"Kjell Inge","family":"Reitan","sequence":"additional","affiliation":[{"name":"Department of Biology Norwegian University of Science and Technology (NTNU) Trondheim Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,9,10]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.3354\/aei00134"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1080\/17451000.2013.810755"},{"key":"e_1_2_8_4_1","volume-title":"Aquaculture, Annually final figures","author":"Baklien A. 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