The role of free-flowing tributary rivers in the maintenance of genetic diversity of a migratory fish species living in a river fragmented by dams

Ferreira, Dhiego G.; Carlsson, Jens; Galindo, Bruno A.; Frantine‐Silva, Wilson; Apolinário-Silva, Caroline; Meschini, Jéssica S.; Zanatta, Augusto Seawright; Almeida, Fernanda Simões de; Sofia, Silvia Helena

doi:10.1007/s10750-021-04782-9

Cited by 5 publications

(10 citation statements)

References 81 publications

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“…We analysed a dataset marked by highly polymorphic loci (up to 29 alleles/locus), a high probability of exclusion (>99%) and unrelated individuals. The sample sizes (>27 individuals/sample) analysed are equivalent to population studies on different fish species (Ashikaga et al, 2015; Ferreira et al, 2015, 2016, 2017, 2022; Ribolli et al, 2012). Likewise, the genetic diversity and structure are also similar to the records for adult populations of P. maculatus from the same river basin (Ferreira et al, 2022) and others (Ribolli et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The sample sizes (>27 individuals/sample) analysed are equivalent to population studies on different fish species (Ashikaga et al, 2015; Ferreira et al, 2015, 2016, 2017, 2022; Ribolli et al, 2012). Likewise, the genetic diversity and structure are also similar to the records for adult populations of P. maculatus from the same river basin (Ferreira et al, 2022) and others (Ribolli et al, 2012). Moreover, we evaluated spawning events in three different sample sites that showed the same pattern.…”

Section: Discussionmentioning

confidence: 99%

“…Combining a large pool of breeders, equal sex ratios and random mating lead to the maintenance of larger effective population sizes, hence high levels of genetic diversity through generations. The polygynandrous mating system with a 1:1 sex ratio in P. maculatus might help to explain the high levels of genetic diversity (e.g., He > 0.8) and low levels of genetic structure between subdivided or distant populations of this species (Almeida et al, 2003; Ferreira et al, 2022; Ribolli et al, 2012). The species usually show fixation indexes (i.e., F ST and its relatives) close to zero, but differentiation indexes (e.g., D EST ) up to 0.4 (Ferreira et al, 2022; Ribolli et al, 2012; this study).…”

Section: Discussionmentioning

confidence: 99%

“…The type of spawning and migration patterns have been points of controversy in the literature with records of both partial (Godinho et al, 1974;Hirt et al, 2005) and total spawning (Orsi, 2010), as well as short-distance (Agostinho et al, 2003(Agostinho et al, , 2004Makrakis et al, 2012) or long-distance migrations (>1000 km; Godoy, 1967). The genetic diversity and structure in P. maculatus have been screened in different studies and river basins (Almeida et al, 2003;Ferreira et al, 2022;Ribolli et al, 2012). The species has shown low genetic structure and high levels of genetic diversity (e.g., He > 0.88; Ferreira et al, 2022) even in fragmented landscapes, wherein loss of genetic diversity and structure are expected.…”

Section: Pimelodus Maculatusmentioning

confidence: 99%

“…The genetic diversity and structure in P. maculatus have been screened in different studies and river basins (Almeida et al, 2003; Ferreira et al, 2022; Ribolli et al, 2012). The species has shown low genetic structure and high levels of genetic diversity (e.g., He > 0.88; Ferreira et al, 2022) even in fragmented landscapes, wherein loss of genetic diversity and structure are expected.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Polygynandry and high genetic diversity supported by kinship and population genetics from neotropical catfish ichthyoplankton

Frantine‐Silva

Savada

Almeida

et al. 2022

Ecology of Freshwater Fish

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Knowledge about reproductive biology is critical for understanding species ecology and evolution, hence their conservation. However, such information remains elusive for many species due to the difficulty of observing mating in nature. Herein, we coupled population and sociogenetic analysis to assess the reproductive biology of an important South American catfish, the “painted catfish” Pimelodus maculatus. We analysed the genetic diversity and kinship patterns of three wild ichthyoplankton samples identified by DNA barcoding and screened with microsatellite loci. We found the same trend in the three samples analysed: a high number unrelated larvae (r < 0.25) and potential parents involved (Ca1, 24♀:24♂; Ca2, 21♀:23♂; Cin, 24♀:25♂), as well as a high number of familial clusters (ML: 19‐21; MCMC: 23‐26). The data indicate a parental sexual proportion close to 1:1 and a polygynandrous mating system. We found high levels of genetic diversity, low GST values (GST < 0.014), but moderate DEST values between the tributary and reservoir samples (DEST > 0.25; Cin x Ca1 or Cin x Ca2), a similar pattern to the observed in adult populations. These results indicate that the mating system of P. maculatus has played an important role in minimising the loss of genetic diversity, a condition that may have favoured the species in a highly fragmented landscape.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Pimelodus Maculatusmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Polygynandry and high genetic diversity supported by kinship and population genetics from neotropical catfish ichthyoplankton

Frantine‐Silva

Savada

Almeida

et al. 2022

Ecology of Freshwater Fish

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Population genetics of Macrognathus siamensis (Synbranchiformes: Mastacembelidae): Implications for non-migratory fishery resources in the Mekong River basin

Truong,

Tran,

Carpenter

et al. 2025

Fisheries Research

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Different stocks of Prochilodus lineatus along the Cinzas River basin: contributions from a free-flowing tributary in the Capivara Reservoir region, Paranapanema River basin (upper Paraná River)

Ferreira,

Galindo,

Limeira

et al. 2023

Neotrop. ichthyol.

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Dams are one of the main threats to Neotropical potamodromous fish, causing blockages of migratory routes and loss of breeding areas in an increasing number of drainage systems. In this scenario, current data argue that the maintenance of free-flowing tributaries along fragmented watersheds would be an important strategy to the migratory fish conservation, both in panmixia situations and in scenarios with different coexisting stocks, as already reported for Prochilodus lineatus. This study analyzed microsatellite loci and mitochondrial haplotypes in samples of P. lineatus obtained in different years along the Cinzas River basin, as well as in the Capivara Reservoir (largest Reservoir in the Paranapanema main channel, upper Paraná River) and in the Tibagi River, all connected by free stretches, aiming to investigate the contributions of the Cinzas River basin to the population dynamics of migratory fish in the Capivara reservoir region. Both markers detected high genetic diversity levels and indicated different genetic stocks of P. lineatus along the Cinzas River basin, suggesting some temporal genetic structuring, as well as the mixture of these stocks in the sample from the Capivara reservoir and from other points, corroborating the relationships among stocks in this reservoir and its tributaries.

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The role of free-flowing tributary rivers in the maintenance of genetic diversity of a migratory fish species living in a river fragmented by dams

Cited by 5 publications

References 81 publications

Polygynandry and high genetic diversity supported by kinship and population genetics from neotropical catfish ichthyoplankton

Polygynandry and high genetic diversity supported by kinship and population genetics from neotropical catfish ichthyoplankton

Population genetics of Macrognathus siamensis (Synbranchiformes: Mastacembelidae): Implications for non-migratory fishery resources in the Mekong River basin

Different stocks of Prochilodus lineatus along the Cinzas River basin: contributions from a free-flowing tributary in the Capivara Reservoir region, Paranapanema River basin (upper Paraná River)

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