{"refrec":{"BRefID":302753,"RR":"<b>Blank, M.; Laine, A.O.; Jürss, K.; Bastrop, R.</b> (2007). Molecular identification key based on PCR/RFLP for three polychaete sibling species of the genus <i>Marenzelleria</i>, and the species’ current distribution in the Baltic Sea. <i>Helgol. Mar. Res. 62(2)</i>: 129-141. <a href=\"https://dx.doi.org/10.1007/s10152-007-0081-8\" target=\"_blank\">https://dx.doi.org/10.1007/s10152-007-0081-8</a>","BEntID":294999,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Helgol. Mar. Res. 62(2)</i>: 129-141. <a href=\"https://dx.doi.org/10.1007/s10152-007-0081-8\" target=\"_blank\">https://dx.doi.org/10.1007/s10152-007-0081-8</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Blank, M.; Laine, A.O.; Jürss, K.; Bastrop, R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Blank, M. <i>et al.</i>","Englishabstract":"Studies of <i>Marenzelleria</i> species were often hampered by identification uncertainties when using morphological characters only. A newly developed PCR/RFLP protocol allows a more efficient discrimination of the three species <i>Marenzelleria viridis, Marenzelleria neglecta</i> and <i>Marenzelleria arctia</i> currently known for the Baltic Sea. The protocol is based on PCR amplification of two mitochondrial DNA gene segments (16S, COI) followed by digestion with restriction enzymes. As it is faster and cheaper than PCR/sequencing protocols used so far, the protocol is recommended for large-scale analyses. The markers allow an undoubted determination of species irrespective of life stage or condition of the worms in the samples. The protocol was validated on about 950 specimens sampled at more than 30 sites of the Baltic and the North Sea, and on specimens from populations of the North American east coast. Besides this test we used mitochondrial DNA sequences (16S, COI, Cytb) and starch gel electrophoresis to further investigate the distribution of the three <i>Marenzelleria</i> species in the Baltic Sea. The results show that <i>M. viridis</i> (formerly genetic type I or M. cf. wireni) occurred in the Öresund area, in the south western as well as in the eastern Baltic Sea, where it is found sympatric with M. neglecta. Allozyme electrophoresis indicated an introduction by range expansion from the North Sea. The second species, <i>M. arctia</i>, was only found in the northern Baltic Sea, where it sometimes occurred sympatric with M. neglecta or <i>M. viridis</i>. For Baltic <i>M. arctia</i>, the most probable way of introduction is by ship ballast water from the European Arctic. There is an urgent need for a new genetic analysis of all <i>Marenzelleria</i> populations of the Baltic Sea to unravel the current distribution of the three species.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Molecular identification key based on PCR/RFLP for three polychaete sibling species of the genus <i>Marenzelleria</i>, and the species’ current distribution in the Baltic Sea","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-05-29 01:31:23.421759","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Invasion; Baltic Sea; PCR/RFLP; PCR/sequencing; Species identification ","OtherDescriptors":null,"Notes":null,"AnaPub":2007,"MonPub":null,"DateUpdate":"2018-11-05","DateCreate":"2018-11-05","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000256009100004","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/s10152-007-0081-8"},"refs":null,"anarec":{"AnaID":302753,"PubliDate":2007,"Pagination":"129-141","XtraPublOfAnaID":null,"ISBN":null,"Volume":"62","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45639,"SerRR":"Helgoland Marine Research. 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