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Complexo Littorina ziczac (Gmelin) (Mollusca, Gastropoda, Caenogastropoda) no litoral fluminense: análise morfométrica, distribuição vertical e bioquímica

The Littorina ziczac (Gmelin) complex (Mollusca, Gastropoda, Caenogastropoda) in the Rio de Janeiro coast: morphometric analysis, vertical distribution and biochemistry

Resumo

The Littorina ziczac (Gmelin, 1791) species complex was studied in Rio de Janeiro State, southeastern Brazil. The occurrence of three species was confirmed, through the analysis of penis morphology: L. ziczac (Gmelin, 1791), L. lineata d'Orbigny, 1841 and L. lineolata d'Orbigny, 1840. There is a correlation between the morphology of the penis and shell shape, thus it was possible to make a discrimination model based in conchologic data, with an efficiency of 75%. However, this model cannot be applied to others samples that weren't included in its formulation, due to phenotypic plasticity of the shell caused by biotic and abiotic factors. In the 9 areas studied L. lineolata was always the most abundam species. No vertical stratification in the distribution of the species was verified. From the nine enzymatic systems examined, only Pgi, Pgm e Mpi, presented identifiable patterns and no diagnostic locus was identified in any species. Nevertheless, S and I suggest the individualization of L. ziczac and L. lineata,respectively.

Littorina; species complex; vertical distribution; biochemistiy; Rio de Janeiro; Brazil


Littorina; species complex; vertical distribution; biochemistiy; Rio de Janeiro; Brazil

Complexo Littorina ziczac (Gmelin) (Mollusca, Gastropoda, Caenogastropoda) no litoral fluminense: análise morfométrica, distribuição vertical e bioquímica

The Littorina ziczac (Gmelin) complex (Mollusca, Gastropoda, Caenogastropoda) in the Rio de Janeiro coast: morphometric analysis, vertical distribution and biochemistry

Ricardo Silva AbsalãoI,II; Renata Alves Pinheiro RobergI

IDepartamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro. 21941-570 Rio de Janeiro, Rio de Janeiro, Brasil

IIDepartamento de Biologia Animal e Vegetal, Instituto de Biologia, Universidade do Estado do Rio de Janeiro. Rua São Francisco Xavier 524, 20550-900 Rio de Janeiro, Rio de Janeiro, Brasil

ABSTRACT

The Littorina ziczac (Gmelin, 1791) species complex was studied in Rio de Janeiro State, southeastern Brazil. The occurrence of three species was confirmed, through the analysis of penis morphology: L. ziczac (Gmelin, 1791), L. lineata d'Orbigny, 1841 and L. lineolata d'Orbigny, 1840. There is a correlation between the morphology of the penis and shell shape, thus it was possible to make a discrimination model based in conchologic data, with an efficiency of 75%. However, this model cannot be applied to others samples that weren't included in its formulation, due to phenotypic plasticity of the shell caused by biotic and abiotic factors. In the 9 areas studied L. lineolata was always the most abundam species. No vertical stratification in the distribution of the species was verified. From the nine enzymatic systems examined, only Pgi, Pgm e Mpi, presented identifiable patterns and no diagnostic locus was identified in any species. Nevertheless, S and I suggest the individualization of L. ziczac and L. lineata,respectively.

Key words:Littorina, species complex, vertical distribution, biochemistiy, Rio de Janeiro, Brazil

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Recebido em 31.X.1997; aceito em 22.III.1999.

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Datas de Publicação

  • Publicação nesta coleção
    01 Jul 2009
  • Data do Fascículo
    Jun 1999

Histórico

  • Aceito
    22 Mar 1999
  • Recebido
    31 Out 1997
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