Genetic differentiation and gene flow of the Amazonian catfish Pseudoplatystoma punctifer across the Madeira River rapids prior to the construction of hydroelectric dams

Cunha-Machado, Antônio Saulo; Farias, Izeni Pires; Hrbek, Tomas; Escobar, María Doris; Alves-Gomes, José Antônio; Formiga, Kyara Martins; Batista, Jacqueline da Silva

doi:10.1007/s10750-021-04705-8

Cited by 4 publications

(5 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Microsatellite genotypes showed an excess of homozygotes, LD between different pairs of microsatellites within the sites of capture (data not shown) and deviations from HWE (Supporting Information Table S1). Potential reasons for these results are (a) population structure or the pooling of subpopulations at each site, (b) the migratory behaviour of this species and (c) the existence of overlapping generations (Cunha‐Machado et al ., 2021; Ellner & Hairston Jr, 2015; Hey & Machado, 2003). Taken together, these characteristics displayed by the study system are commonly responsible for causing deviations from HWE under the well‐known Wahlund effect (Wahlund, 1928).…”

Section: Discussionmentioning

confidence: 99%

Genetic population structure of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) and evidence of temporal variation in structure

Rueda

Machado

Castro

et al. 2023

Journal of Fish Biology

View full text Add to dashboard Cite

Surubim (Pseudoplatystoma corruscans, Pimelodidae) are migratory catfish native to the rivers in the La Plata and São Francisco basins. They are piscivores that attain considerable body sizes and are a valuable economic resource. Surubim exhibits extensive migrations during its life cycle that may affect the population structure at vast geographic scales. The authors examined the genetic diversity and population genetic structure of P. corruscans using microsatellite markers from a comprehensive sampling of 260 individuals from the Upper and Lower Paraná River. They identified two well-differentiated genetic clusters corresponding to a natural geographic barrier historically separating Upper and Lower Paraná regions. They also demonstrated temporal variation in population genetic structure at a site in Lower Paraná close to the confluence with the Paraguay River, most likely explained by the influx of migrant fishes at certain times of the year.

show abstract

Section: Discussionmentioning

confidence: 99%

Genetic population structure of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) and evidence of temporal variation in structure

Rueda

Machado

Castro

et al. 2023

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…Therefore, it is recommended to use less conserved molecular markers such as microsatellites (Cunha- Machado et al, 2022) for the analysis of these species and/or the use of genomics (Keller et al, 2013) as a tool. However, the hypothesis of hybridization being responsible for the disagreement between morphological identification and molecular identification based on coalescence in these species cannot be ruled out, and these cases need to be better evaluated in the future.…”

Section: Morphological Id Asap Methodsmentioning

confidence: 99%

Identification of fish specimens of the Tocantins River, Brazil, using DNA barcoding

Lima,

de Lima,

Rocha

et al. 2024

Journal of Fish Biology

Self Cite

View full text Add to dashboard Cite

The fish fauna of the Tocantins River possesses many endemic species; however, it is little studied in molecular terms and is quite threatened by the construction of several hydroelectric dams. Therefore, the objective of this study was to identify the ichthyofauna of the Tocantins River using DNA barcoding. For this, collections were carried out in five points of this river, which resulted in the capture of 725 individuals from which partial sequences of the cytochrome oxidase subunit I (COI) gene were obtained for genetic analysis. A total of 443 haplotypes were recovered with the mean intraspecific K2P genetic distance of 1.82%. Altogether, 138 species were identified based on morphological criteria, which was a quantity that was much lower than that indicated by the four molecular methods (assemble species by automatic partitioning [ASAP], barcode index number [BIN], generalized mixed Yule coalescent (GMYC), and Bayesian Poisson tree processes [bPTP]) through which 152–157 molecular entities were identified. In all, 41 unique BINs were obtained based on the data generated in the BOLDSystems platform. According to the result indicated by ASAP (species delimitation approach considered the most appropriate in the present study), there was an increase of 17 molecular entities (12.32%), when compared to the number of species identified through their morphological criteria, as it can show cryptic diversity, candidates for new species, and misidentifications. There were 21 incongruities indicated between the different identification approaches for species. Therefore, it is suggested that these taxonomic problems be cautiously evaluated by experts to solve such taxonomic issues.

show abstract

“…The annual migrations of fishes (piracema), birds, and insects, as well as tree fruiting blooms, all constitute important biotic resources for human agroecosystems and other natural Amazonian ecosystems (Goulding et al 2019). These behaviors are the basis for important ecological phenomena and annual life cycles, including mast flowering, phenological patterns, reproductive booms, and natural flood regimes (Alho 2020;Cunha-Machado et al 2021). Such phenomena need to be considered in regional planning and during rainforest conservation efforts.…”

Section: Conservation Of Ecological and Evolutionary Processesmentioning

confidence: 99%

Evolution of Amazonian biodiversity: A review

GUAYASAMIN,

RIBAS,

CARNAVAL

et al. 2024

Acta Amaz.

View full text Add to dashboard Cite

Amazonia (defined herein as the Amazon basin) is home to the greatest concentration of biodiversity on Earth, providing unique genetic resources and ecological functions that contribute to ecosystem services globally. The lengthy and complex evolutionary history of this region has produced heterogeneous landscapes and riverscapes at multiple scales, altered the geographic and genetic connections among populations, and impacted rates of adaptation, speciation, and extinction. In turn, ecologically diverse Amazonian biotas promoted further diversification, species coexistence, and coevolution, with biodiversity accumulating over tens of millions of years. Important events in Amazonian history included: (i) late Cretaceous and early Paleogene origin of major rainforest plant and animal groups; (ii) Eocene-Oligocene global cooling with rainforests contracting to tropical latitudes separating Atlantic coastal and Amazonian rainforests; (iii) Miocene uplift of central and northern Andes that separated Pacific coastal and Amazonian rainforests, spurred formation of mega-wetlands in the western Amazon, and contributed to the origin of the modern transcontinental Amazon River; (iv) late Neogene formation of the Panamanian Isthmus that facilitated the Great American Biotic Interchange; (v) Pleistocene climate oscillations followed by late Pleistocene-Holocene human colonization and megafaunal extinctions; and (vi) modern era of widespread anthropogenic deforestation, defaunation, and ecological transformations of regional landscapes and global climates. Amazonian conservation requires decade-scale investments into biodiversity documentation and monitoring to leverage existing scientific capacity, and strategic habitat planning to allow continuity of evolutionary and ecological processes now and into the future.

show abstract

Genetic differentiation and gene flow of the Amazonian catfish Pseudoplatystoma punctifer across the Madeira River rapids prior to the construction of hydroelectric dams

Cited by 4 publications

References 71 publications

Genetic population structure of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) and evidence of temporal variation in structure

Genetic population structure of Pseudoplatystoma corruscans (Siluriformes: Pimelodidae) and evidence of temporal variation in structure

Identification of fish specimens of the Tocantins River, Brazil, using DNA barcoding

Evolution of Amazonian biodiversity: A review

Contact Info

Product

Resources

About