2012
DOI: 10.1590/s1679-62252012000400015
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Genetic diversity of the species Leporinus elongatus (Teleostei: Characiformes) in the Canoas Complex - Paranapanema River

Abstract: Dams constructed along waterways interrupt the dispersion and migration of aquatic organisms, affecting mainly the abundance of migratory fish species. Translocation mechanisms have been constructed at dams aiming to minimize their impact on fish species migration behavior. There is little information available about the effect of the construction of dams on the genetic structure of the Neotropical migratory fish fauna. Therefore, RAPD molecular markers and microsatellites were utilized to evaluate the diversi… Show more

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Cited by 12 publications
(12 citation statements)
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References 29 publications
(31 reference statements)
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“…Despite the limitations of the technique, prudent application of these markers can provide equivalent results and interpretations to those derived from codominant marker analysis (Ramos et al, 2008(Ramos et al, , 2012Phong et al, 2011). Moreover, the results produced by RAPD markers are reproducible (Pascual et al, 2006).…”
Section: Discussionmentioning
confidence: 99%
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“…Despite the limitations of the technique, prudent application of these markers can provide equivalent results and interpretations to those derived from codominant marker analysis (Ramos et al, 2008(Ramos et al, , 2012Phong et al, 2011). Moreover, the results produced by RAPD markers are reproducible (Pascual et al, 2006).…”
Section: Discussionmentioning
confidence: 99%
“…The effects on these species are often related to the immediate impacts of the construction of dams, which often affect migration routes and, therefore, gene flow within and between populations. However, because of the high genetic diversity of these species before fragmentation (Ramos et al, 2012; and their migratory capacity (Agostinho et al, 2003), the processes that drive genetic structure evolution after fragmentation, such as genetic drift and inbreeding, may be attenuated in the short and medium term. The dispersion capacity of migratory species can support the maintenance of large groups of interbreeding individuals even when the fish are absent from intermediate stretches in the river.…”
Section: Discussionmentioning
confidence: 99%
“…The number of fragments ranged between 12 and 21, size between 200 and 2200 bp (Table 1). In their study on L. elongatus, Ramos et al (2012) detected a similar number of fragments varying between 8 and 22.…”
Section: Resultsmentioning
confidence: 82%
“…Wright (1978) and number of migrants per generation (Nm) for populations (PopA and PopB) of Piapara (L. elongatus) in the HPP São Domingos area. Research by Gomes et al (2013) and Ramos et al (2012) demonstrated that physical barriers, such as HPP, affect the genetic composition of populations in the regions upstream and downstream. Current research showed that a natural barrier, such as the Cachoeira Branca, also triggers a genetic differentiation in the populations but does not totally hinder the genic flow between the two.…”
Section: Resultsmentioning
confidence: 99%
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