Contribution of conservation genetics in assessing neotropical freshwater fish biodiversity

Piorski, Nivaldo Magalhães; Sanches, Alexandra; Carvalho-Costa, L. F; Hatanaka, Terumi; Carrillo-Avila, M; Freitas, Patrícia Domingues de; Galetti, Pedro M.

doi:10.1590/s1519-69842008000500011

Cited by 26 publications

(142 citation statements)

References 102 publications

(142 reference statements)

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“…F statistics (Wright, 1978) or their analogs are measurements of the hierarchical levels of structure within and between populations (Piorski et al, 2008;Oliveira et al, 2009). In the present study, relatively low levels of genetic structure, i.e., F ST /ϕ ST values smaller than 0.05 (Wright, 1978;Excoffier et al, 1992), were found in four species but not S. insculpta (Table 2).…”

Section: Discussionsupporting

confidence: 46%

“…RAPD markers have been used for analysis of genetic diversity and structure in freshwater fish species (Piorski et al, 2008). 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).…”

Section: Discussionmentioning

confidence: 99%

“…Genetic diversity studies in neotropical ichthyofauna have focused on species with a long history of reproductive displacement (Piorski et al, 2008;Oliveira et al, 2009). 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.…”

Section: Discussionmentioning

confidence: 99%

“…These changes influence the reproduction, distribution, and vulnerability of populations to stochastic processes related to loss of genetic diversity (Slatkin, 1985;Piorski et al, 2008;Oliveira et al, 2009). The upper Paraná River basin is one of the most studied watersheds in South America.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, such information can be very helpful in understanding the effects of anthropogenic activities, such as dams, on the fish populations throughout the river basin. In the last decade, use of PCR-RAPD (random amplified polymorphic DNA) markers has been widely adopted to study genetic diversity and structure in neotropical fish populations in South America (Piorski et al, 2008), producing results that are comparable with those from other markers (Ramos et al, 2008;Muneer et al, 2009;Phong et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Genetic analysis of five sedentary fish species in middle Laranjinha River (upper Paraná River basin): A case study

Frantine-Silva¹,

Ferreira

Nascimento³

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Most studies of diversity and genetic structure in neotropical fish have focused on commercial species from large rivers or their reservoirs. However, smaller tributaries have been identified as an important alternative migratory route, with independent pools of genetic diversity. In this context, the present study aimed to evaluate genetic diversity and structure in five neotropical fish species from a region of Laranjinha River in the upper Paraná River basin. PCR-RAPD (random amplified polymorphic DNA) markers were used to characterize around 40 individuals of each species distributed upstream and downstream of Corredeira Dam that interrupts the river. The descriptive index of genetic diversity (P = 30.5-82%; H E 0.122-0.312) showed that the populations have acceptable levels of genetic diversity. The values for Nei's genetic distance (D N min 0.0110 and max 0.0306) as well as the genetic structure index and the analysis of molecular variance (AMOVA, ϕ ST min 0.0132 and max 0.0385) demonstrated low, but significant levels of genetic structure. Bayesian analysis of assignment found two k clusters, including several individuals with mixed ancestry for all populations from the five species analyzed. These findings along with historical data on rainfall and the low dimensions of the dam studied here support the hypothesis that periodic floods enable the transit of individuals between different localities mitigating the differentiation process between populations.

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Contribution of conservation genetics in assessing neotropical freshwater fish biodiversity

Cited by 26 publications

References 102 publications

Genetic analysis of five sedentary fish species in middle Laranjinha River (upper Paraná River basin): A case study

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