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- W2340376494 abstract "Until 1982, the Guaira Falls, also named the Seven Falls, constituted a barrier to the dispersion of migratory fish in the Parana River. The objective of this work was to verify if populations of Pseudoplatystoma corruscans (Osteichthyes, Pimelodidae) were isolated by the Guaira Falls. Samples from the Upper Parana River floodplain (PL), the Itaipu reservoir (IT), and downstream Yacyreta reservoir (YA) were compared by RAPD markers. Lynch's FST was significant between PL and IT (0.090), and PL and YA (0.112). Estimated gene flow ( Nm ) varied from 2.0 between PL and YA to 8.1 between IT and YA. Nei's genetic distance varied from D = 0.0638 between PL and YA to D = 0.0174 between IT and YA. These results indicate the existence of genetic differentiation and that, possibly, the Guaira Falls isolated the populations reproductively. They also suggest the possibility of different spawning areas, partially avoiding the genetic homogenization of the IT and PL populations." @default.
- W2340376494 created "2016-06-24" @default.
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- W2340376494 date "2002-01-01" @default.
- W2340376494 modified "2023-09-24" @default.
- W2340376494 title "the Guaíra Falls in the Paraná River the Guaíra Falls in the Paraná River the Guaíra Falls in the Paraná River the Guaíra Falls in the Paraná River" @default.
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