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Population structure analysis of Pimelodus maculatus (Pisces, Siluriformes) from the Tietê and Paranapanema Rivers (Brazil)

2003; Brazilian Society of Genetics; Volume: 26; Issue: 3 Linguagem: Inglês

10.1590/s1415-47572003000300014

1678-4685

Fernanda Simões de Almeida, Leda Maria Koelblinger Sodré, Eucléia Primo Betioli Contel,

Genetic diversity and population structure

Pimelodus maculatus populations from the Tietê and Paranapanema rivers were sampled and had their genetic structure analyzed by using RAPD markers, with the aim of contributing to future conservation studies. The proportion of polymorphic loci was greater than 50% in the populations of both rivers. Genetic diversity data showed that, in spite of its nine hydroelectric plants, the Tietê river population was genetically homogeneous, whereas the Paranapanema river population was structured. This might be due to the presence of high waterfalls distributed all along its course. These data may serve as indicators for future conservation studies on the Tietê and Paranapanema rivers.