{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,8]],"date-time":"2025-09-08T05:39:30Z","timestamp":1757309970071,"version":"3.37.3"},"reference-count":64,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2017,10,20]],"date-time":"2017-10-20T00:00:00Z","timestamp":1508457600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2017,10,20]],"date-time":"2017-10-20T00:00:00Z","timestamp":1508457600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Sci Rep"],"abstract":"<jats:title>Abstract<\/jats:title><jats:p>We determined the nearly complete mitochondrial genomes of the Arctic <jats:italic>Calanus glacialis<\/jats:italic> and its North Atlantic sibling <jats:italic>Calanus finmarchicus<\/jats:italic>, which are key zooplankton components in marine ecosystems. The sequenced part of <jats:italic>C<\/jats:italic>. g<jats:italic>lacialis<\/jats:italic> mitogenome is 27,342\u2009bp long and consists of two contigs, while for <jats:italic>C. finmarchicus<\/jats:italic> it is 29,462\u2009bp and six contigs, what makes them the longest reported copepod mitogenomes. The typical set of metazoan mitochondrial genes is present in these mitogenomes, although the non-coding regions (NCRs) are unusually long and complex. The mitogenomes of the closest species <jats:italic>C. glacialis<\/jats:italic> and <jats:italic>C. finmarchicus<\/jats:italic>, followed by the North Pacific <jats:italic>C. sinicus<\/jats:italic>, are structurally similar and differ from the much more typical of deep-water, Arctic <jats:italic>C. hyperboreus<\/jats:italic>. This evolutionary trend for the expansion of NCRs within the <jats:italic>Calanus<\/jats:italic> mitogenomes increases mitochondrial DNA density, what resulted in its similar density to the nuclear genome. Given large differences in the length and structure of <jats:italic>C. glacialis<\/jats:italic> and <jats:italic>C. finmarchicus<\/jats:italic> mitogenomes, we conclude that the species are genetically distinct and thus cannot hybridize. The molecular resources presented here: the mitogenomic and rDNA sequences, and the database of repetitive elements should facilitate the development of genetic markers suitable in pursuing evolutionary research in copepods.<\/jats:p>","DOI":"10.1038\/s41598-017-13807-0","type":"journal-article","created":{"date-parts":[[2017,10,16]],"date-time":"2017-10-16T11:36:51Z","timestamp":1508153811000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Mitochondrial genomes of the key zooplankton copepods Arctic Calanus glacialis and North Atlantic Calanus finmarchicus with the longest crustacean non-coding regions"],"prefix":"10.1038","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6655-6613","authenticated-orcid":false,"given":"Agata","family":"Weydmann","sequence":"first","affiliation":[]},{"given":"Aleksandra","family":"Przy\u0142ucka","sequence":"additional","affiliation":[]},{"given":"Marek","family":"Lubo\u015bny","sequence":"additional","affiliation":[]},{"given":"Katarzyna S.","family":"Walczy\u0144ska","sequence":"additional","affiliation":[]},{"given":"Ester A.","family":"Serr\u00e3o","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0768-464X","authenticated-orcid":false,"given":"Gareth A.","family":"Pearson","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0185-197X","authenticated-orcid":false,"given":"Artur","family":"Burzy\u0144ski","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2017,10,20]]},"reference":[{"key":"13807_CR1","doi-asserted-by":"publisher","first-page":"233","DOI":"10.1007\/BF00390879","volume":"40","author":"A Fleminger","year":"1977","unstructured":"Fleminger, A. & Hulsemann, K. 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