{"refrec":{"BRefID":56826,"RR":"<b>Stevens, M.I.; Hogg, I.D.</b> (2004). Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation. <i>Biol. J. Linn. Soc. 81(1)</i>: 119-133","BEntID":54408,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Biol. J. Linn. Soc. 81(1)</i>: 119-133","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Stevens, M.I.; Hogg, I.D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Stevens, M.I.; Hogg, I.D.","Englishabstract":"Allozyme electrophoresis was used to examine population genetic structure at inter- and intraspecific levels for the New Zealand endemic corophiid amphipods, <i>Paracorophium lucasi</i> and <i>P. excavatum</i>. Individuals were collected from estuarine and freshwater habitats from North, South and Chatham Islands. Analyses of genetic structure among interspecific populations indicated clear allelic differentiation between the two <i>Paracorophium</i> species (Nei's genetic distance, D = 1.62), as well as considerable intraspecific substructuring (D = 0.15-0.65). These levels of divergence are similar to interspecific levels for other amphipods and it is proposed that at least two groups from the <i>P. lucasi</i> complex and three from the <i>P. excavatum</i> complex correspond to sibling species. In most cases allopatry can account for the differentiation among the putative sibling species. For populations that share a common coastline we found low levels of differentiation and little or no correlation with geographical distance, suggesting that gene flow is adequate to maintain homogeneous population genetic structure. By contrast, populations on separate coastlines (i.e. isolated by land) showed moderate levels of geographical differentiation indicating restricted gene flow. The juxtaposition of population genetic and biogeographical data for <i>Paracorophium</i> in conjunction with the geological record infers past histories of glacial extirpation, and possible isolating effects of sea-level and landmass changes that have occurred throughout the Plio-Pleistocene.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Population genetic structure of New Zealand's endemic corophiid amphipods: evidence for allopatric speciation","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2004,"MonPub":null,"DateUpdate":"2004-02-02","DateCreate":"2004-01-28","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000188469800009","VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":56826,"PubliDate":2004,"Pagination":"119-133","XtraPublOfAnaID":null,"ISBN":null,"Volume":"81","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42441,"SerRR":"Biological Journal of the Linnean Society. Academic Press: London; New York.  ISSN 0024-4066; e-ISSN 1095-8312","StandardTitleSer":"Biological Journal of the Linnean Society","ISSN":"0024-4066","AbbrevSer":"Biol. J. Linn. 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