DIFERENCIAÇÃO MORFOLÓGICA ENTRE POPULAÇÕES DE Corydoras aeneus GILL (1858) (SILURIFORMES, CALLICHTHYIDAE) EM RIACHOS DAS BACIAS HIDROGRÁFICAS DOS RIOS PARANÁ E PARAGUAI
2015
Alexandro Cezar Floretnino | Yzel Rondon Súarez
Portuguese. <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><span style="font-size: 12.0pt; mso-bidi-font-size: 10.0pt; font-family: ">: No presente estudo analisamos a existencia de diferenciação na morfologia de populações isoladas de <em style="mso-bidi-font-style: normal;">Corydoras aeneus (Gill, 1858). Quatorze caracteres morfométricos foram utilizados para a avaliação na morfologia de 14 populações isoladas das bacias dos rios Paraná e Paraguai. Verificamos a existência de diferenciação morfológica com auxílio da Análise de Função Discriminante. Utilizamos o teste de Mantel para observar se existia relação entre a similaridade morfológica e a distância geográfica. Após, realizamos uma análise de <span style="mso-spacerun: yes;"> entre a similaridade morfológica e as características ambientais dos riachos. Constatamos, que existe diferença significativa na morfologia das espécies entre os locais (Wilk’s Lambda= 0,01707; F<sub>(182,935)</sub>= 1,92; p<0,0000). Existe correlação significativa entre a morfologia das espécies e as características dos locais coletados (Mantel r= 0,62041, p= 0,003). As diferenças na morfologia das populações foram congruentes com as diferenças nas características dos riachos estudados. Desta forma, ao longo do tempo evolutivo foram selecionados os indivíduos que apresentavam características que conferiam maior adaptação às características ambientais, independente da distância geográfica entre estas populações estudadas.</span><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF /> <w:LidThemeOther>PT-BR</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> <w:SplitPgBreakAndParaMark /> <w:EnableOpenTypeKerning /> 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