{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,18]],"date-time":"2026-01-18T05:08:58Z","timestamp":1768712938418,"version":"3.49.0"},"reference-count":29,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2021,1,23]],"date-time":"2021-01-23T00:00:00Z","timestamp":1611360000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Fish Diseases"],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The sea louse <jats:italic>Caligus rogercresseyi<\/jats:italic> is the most important pathogen causing \u201ccaligidosis\u201d in the Chilean salmon industry. In this study, using cox1 gene, we evaluate the genetic variation of <jats:italic>C.\u00a0rogercresseyi<\/jats:italic> from farmed <jats:italic>Salmo salar<\/jats:italic> along a latitudinal range (40\u00b0\u201352\u00b0S) in south Chile to determine whether morphological differences are explained by genetic or environmental factors. Female parasites were randomly collected from <jats:italic>S.\u00a0salar<\/jats:italic> at five farms. Body variation was examined using multivariate analyses and genetic heterogeneity was explored with AMOVA. <jats:italic>C.\u00a0rogercresseyi<\/jats:italic> exhibited significant morphometric variability among sites and parasites collected from &gt;54\u00b0S were the longest ones. Parasites did not show genetic structure among farms. Thus, <jats:italic>C.\u00a0rogercresseyi<\/jats:italic> infesting salmons is panmictic along an extensive latitudinal range in south Chile. The same genetic pattern can be explained by the frequent movement of parasitized <jats:italic>S.\u00a0salar<\/jats:italic> among farms in that region. Phenotypic plasticity in parasites could be explained by natural or aquaculture\u2010mediated environment variability. <jats:italic>C.\u00a0rogercreseyi<\/jats:italic> from 54\u00b0S could favor the local spread of this disease, suggesting an immediate health risk for the recent salmon industry in that region. Further research is required to confirm genetic homogeneity of this parasite along its geographical distribution using more powerful markers (e.g. SNPs).<\/jats:p>","DOI":"10.1111\/jfd.13341","type":"journal-article","created":{"date-parts":[[2021,1,23]],"date-time":"2021-01-23T14:29:49Z","timestamp":1611412189000},"page":"633-638","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Genetic homogeneity coupled with morphometric variability suggests high phenotypic plasticity in the sea louse <i>Caligus rogercresseyi<\/i> (Boxshall and Bravo, 2000), infecting farmed salmon (<i>Salmo salar<\/i>) along a wide latitudinal range in southern Chile"],"prefix":"10.1111","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5787-4364","authenticated-orcid":false,"given":"Mar\u00eda Teresa","family":"Gonz\u00e1lez","sequence":"first","affiliation":[{"name":"Instituto de Ciencias Naturales \u201cAlexander von Humboldt\u201d Facultad de Ciencias del Mar y Recursos Biol\u00f3gicos Universidad de Antofagasta Antofagasta Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Natalia Ver\u00f3nica","family":"Leiva","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Naturales \u201cAlexander von Humboldt\u201d Facultad de Ciencias del Mar y Recursos Biol\u00f3gicos Universidad de Antofagasta Antofagasta Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabiola","family":"Sep\u00falveda","sequence":"additional","affiliation":[{"name":"Instituto de Ciencias Naturales \u201cAlexander von Humboldt\u201d Facultad de Ciencias del Mar y Recursos Biol\u00f3gicos Universidad de Antofagasta Antofagasta Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gladys","family":"Asencio","sequence":"additional","affiliation":[{"name":"Centro i\u2010mar Universidad de Los Lagos Puerto Montt 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Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,1,23]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1029\/2007JC004593"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijpara.2019.05.007"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.aquaculture.2019.734386"},{"key":"e_1_2_5_5_1","doi-asserted-by":"publisher","DOI":"10.1111\/1755-0998.12125"},{"key":"e_1_2_5_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2109.2008.02159.x"},{"key":"e_1_2_5_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2761.2008.01012.x"},{"key":"e_1_2_5_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ympev.2018.05.012"},{"key":"e_1_2_5_9_1","doi-asserted-by":"publisher","DOI":"10.1645\/14-621.1"},{"key":"e_1_2_5_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pt.2006.08.006"},{"key":"e_1_2_5_11_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1755-0998.2010.02847.x"},{"key":"e_1_2_5_12_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1471-8286.2002.00313.x"},{"issue":"5","key":"e_1_2_5_13_1","first-page":"294","article-title":"Conserved 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