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      Genetic diversity and population structure of Synthesium pontoporiae (Digenea, Brachycladiidae) linked to its definitive host stocks, the endangered Franciscana dolphin, Pontoporia blainvillei (Pontoporiidae) off the coast of Brazil and Argentina.

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          Abstract

          Pontoporia blainvillei (Gervais and d'Orbigny, 1844) is an endangered small cetacean endemic to South America with four Franciscana Management Areas (FMA) recognized as different population stocks. The role of the intestinal parasite Synthesium pontoporiae (Digenea: Brachycladiidae) as a possible biological marker to differentiate P. blainvillei stocks was evaluated using nuclear and mitochondrial DNA markers. Internal transcribed sequence 1 and 2 (ITS1 and ITS2) regions of S. pontoporiae did not show intraspecific variability. The mitochondrial NADH dehydrogenase subunit 3 (ND3) and cytochrome oxidase subunit I (COI) gene sequences suggested lack of population structure in S. pontoporiae and population expansion. The apparent panmixia of S. pontoporiae may be due to the high mobility of one or more of its intermediary hosts. Alternatively, it may be due to the small sample size. This result is incongruent with the previously proposed FMA.

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          Author and article information

          Journal
          J. Helminthol.
          Journal of helminthology
          Cambridge University Press (CUP)
          1475-2697
          0022-149X
          Jan 2015
          : 89
          : 1
          Affiliations
          [1 ] Laboratório de Genética Molecular de Microorganismos,Instituto Oswaldo Cruz, FIOCRUZ,Rio de Janeiro,RJ,Brazil.
          [2 ] Laboratório de Biodiversidade Molecular (UFRJ)/Laboratório de Mamíferos Aquáticos e Bioindicadores (MAQUA, UERJ),Rio de Janeiro,RJ,Brazil.
          [3 ] Projeto BioPesca,Praia Grande,SP,Brazil.
          [4 ] Instituto Terra & Mar,Ilhabela,SP,Brazil.
          [5 ] Instituto Nacional de Pesquisas da Amazônia,Manaus,AM,Brazil.
          [6 ] Universidade da Região de Joinville,Joinville,SC,Brazil.
          [7 ] Universidade do Vale do Itajaí,Balneário Camboriú,SC,Brazil.
          [8 ] Laboratório de Ecologia de Mamíferos Universidade do Vale do Rio dos Sinos (UNISINOS), Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul (GEMARS),Porto Alegre,RS,Brazil.
          [9 ] Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (MACN-CONICET)/Universidad Maimónides y Fundación Azara, CABA,Buenos Aires,Argentina.
          [10 ] Universidade Federal de Pelotas,Pelotas,RS,Brazil.
          [11 ] Laboratório de Avaliação e Promoção da Saúde Ambiental,Instituto Oswaldo Cruz, FIOCRUZ,Rio de Janeiro,RJ,Brazil.
          Article
          S0022149X13000540
          10.1017/S0022149X13000540
          26262593
          3c948510-9b75-4d5d-800f-1c4ca646ee59
          History

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