{"id":489,"date":"2019-12-09T15:53:56","date_gmt":"2019-12-09T18:53:56","guid":{"rendered":"https:\/\/lageevo.crp.ufv.br\/?p=489"},"modified":"2019-12-09T15:53:57","modified_gmt":"2019-12-09T18:53:57","slug":"morphological-and-genetic-structure-of-two-equivalent-astyanax-species","status":"publish","type":"post","link":"https:\/\/lageevo.crp.ufv.br\/?p=489","title":{"rendered":"Morphological and Genetic Structure of Two Equivalent Astyanax Species"},"content":{"rendered":"\n<p><strong>Morphological and Genetic Structure of Two Equivalent Astyanax Species (Characiformes: Characidae) in the Region of Parana\u00edba Arc<\/strong><\/p>\n\n\n\n<p>Renan Rodrigues Rocha, Rosana de Mesquita Alves, Rubens Pasa, Karine Frehner Kavalco<\/p>\n\n\n\n<p>The<em>\u00a0Astyanax scabripinnis<\/em>\u00a0complex is composed of a large number of almost morphological indistinguishable species, including<em>\u00a0Astyanax paranae<\/em>\u00a0and<em>\u00a0Astyanax rivularis<\/em>, which exist in the Paran\u00e1 and S\u00e3o Francisco Basins, respectively, and sometimes are considered subspecies of the<em>\u00a0A. scabripinnis<\/em>\u00a0group or even are cited just as<em>\u00a0A. scabripinnis<\/em>. The two river basins are separated by the Upper Parana\u00edba Arc, likely the main cause of the isolation of these species. We used geometric morphometric tools and DNA analyses of populations of both species to identify the differences between them. Geometric morphometrics separated the two species into distinct groups, whose main difference was the body depth. This is generally related to the speed of the water flow in the river basins. The maximum likelihood phylogram based on mitochondrial DNA sequences formed two main clades: one composed of the population of<em>\u00a0A. rivularis<\/em>\u00a0and the other, of<em>\u00a0A. paranae<\/em>. In the haplotype network, the species were similarly separated into two groups from the same ancestral haplotype, with<em>\u00a0A. rivularis<\/em>\u00a0dispersing into two lineages in the S\u00e3o Francisco River Basin. The distribution of<em>\u00a0A. paranae<\/em>\u00a0is a consequence of a secondary dispersion event in the Paran\u00e1 River Basin. It forms two lineages from a haplotype derived from the ancestor. The vicariant effect of separate basins, through the elevation of the Upper Parana\u00edba Arc, led to the allopatric speciation of the populations originating the present species. The results of geometric morphometrics and molecular data of the fish show the importance of this geological event in the biogeography and evolutionary history of the ichthyofauna of the region and indicate that the isolation of these species seems to be effective.<\/p>\n\n\n\n<p><strong>The Scientific World Journal<\/strong> <\/p>\n\n\n\n<p>Volume 2019, Article ID 6507954, 8 pages <a href=\"https:\/\/doi.org\/10.1155\/2019\/6507954\">https:\/\/doi.org\/10.1155\/2019\/6507954<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Morphological and Genetic Structure of Two Equivalent Astyanax Species (Characiformes: Characidae) in the Region of Parana\u00edba Arc Renan Rodrigues Rocha, Rosana de Mesquita Alves, Rubens Pasa, Karine Frehner Kavalco The\u00a0Astyanax scabripinnis\u00a0complex is composed of a large number of almost morphological indistinguishable species, including\u00a0Astyanax paranae\u00a0and\u00a0Astyanax rivularis, which exist in the Paran\u00e1 and S\u00e3o Francisco Basins, respectively, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[39],"tags":[7,44,46,45],"class_list":["post-489","post","type-post","status-publish","format-standard","hentry","category-publicacoes","tag-astyanax","tag-characiformes","tag-ecological-genetics","tag-morphometry"],"_links":{"self":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/489","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=489"}],"version-history":[{"count":1,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/489\/revisions"}],"predecessor-version":[{"id":490,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=\/wp\/v2\/posts\/489\/revisions\/490"}],"wp:attachment":[{"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lageevo.crp.ufv.br\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}