First fossil record of Pseudoplatystoma corruscans (Siluriformes, Pimelodidae) from the late Pleistocene, Santa Fe, Argentina

Brambilla, Luciano; Toledo, Marcelo Javier; Ibarra, Damián Alberto

doi:10.1016/j.jsames.2020.102987

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…Sorubim (Pseudoplatystoma sp.) is a neotropical siluriform fish native to South America [17] that has important commercial value in Brazilian aquaculture. Sorubim production reached 11,058 tons in 2022 [18], making it the third most-produced native fish in Brazil.…”

Section: Introductionmentioning

confidence: 99%

First Report of Vibrio vulnificus Outbreak in Farm-Raised Sorubim (Pseudoplatystoma sp.) from Brazil

Janampa-Sarmiento,

Reis,

Egger

et al. 2024

Fishes

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Vibrio vulnificus is an opportunistic pathogen in humans and exhibits pathogenic behavior in several aquaculture fish species. To date, in Brazil, there are no reports of V. vulnificus outbreaks in farmed fish. However, in 2019, sorubim (Pseudoplatystoma sp.) in the grow-out phase with clinical signs and cumulative mortality of 40% was registered. We aimed to identify and characterize the etiological agents of this outbreak. Seven moribund fish were sampled for bacteriological studies, and isolates were obtained from the brain and kidneys. Bacterial identification using matrix-assisted laser desorption ionization mass spectrometry (MALDI-TOF/MS) revealed V. vulnificus. One isolate, RP4, was used for identification via dnaJ and 16S rRNA gene sequencing and antimicrobial susceptibility evaluation. Sorubim juveniles were experimentally challenged with RP4 isolate via intracelomic injection (IC, 107 colony-forming units [CFU] fish−1) and immersion bath (IB, 106 CFU mL−1 for 30 min). Identities to V. vulnificus of dnaJ and 16S rRNA genes by BLAST analysis were higher than 92% and 98%, respectively. Susceptibility to oxytetracycline, florfenicol, and other antimicrobial molecules was also observed. In the IC-challenged group, the mortality rate was 100% with V. vulnificus recovered from fish organs (brain, liver, spleen, and kidney). Additionally, splenic endothelium alterations were observed in the IC group. On the contrary, the control and IB groups did not develop any clinical signs, mortality, or bacterial recovery after 7 days of challenge. To the best of our knowledge, this is the first report of pathogenic V. vulnificus in farmed Pseudoplatystoma sp.

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Section: Introductionmentioning

confidence: 99%

First Report of Vibrio vulnificus Outbreak in Farm-Raised Sorubim (Pseudoplatystoma sp.) from Brazil

Janampa-Sarmiento,

Reis,

Egger

et al. 2024

Fishes

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“…Natural History An understanding of the natural history of the lineage provides insights into the geographic distribution of Pseudoplatystoma species. The first and so-far only reported fossil record for the genus is a neurocranium recently discovered from late Pleistocene deposits of the Cacarana River of Argentina, which was assigned to the extant species Pseudoplatystoma corruscans [20]. The fossil record of freshwater fishes in South America is not as well studied as that of terrestrial mammals [21].…”

Section: Introductionmentioning

confidence: 99%

A Synthesis of the Ecology and Conservation of Pseudoplatystoma Catfishes in the Neotropics

Pereira

Castello

Orth

et al. 2023

Fishes

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Species of the genus Pseudoplatystoma, the long-whiskered catfishes, are important in commercial and recreational fisheries in South America, and some species have become key to regional aquaculture. Some species of the genus are under pressure due to overfishing and the negative impacts of dams. Six questions are asked in this review: (i) What species are in the genus, and where are they distributed? (ii) What are the life histories and ecologies of Pseudoplatystoma species? (iii) What are the patterns of somatic growth for these species? (iv) What is known about the biomass, production, and population dynamics of Pseudoplatystoma? (v) What is the geographic distribution of genetic variation within Pseudoplatystoma species? (vi) What are the threats to the conservation of these species? The taxonomy of the genus currently includes eight species, respectively, distributed over the Orinoco, Amazon, Paraná, and São Francisco basins. Pseudoplatystoma catfishes typically exhibit longitudinal migrations for reproduction and lateral migration for feeding, but these patterns may vary among populations. The size of the first maturation of these catfishes varies between 57 cm to 82 cm in total length. Five of the eight species spawn during the rising water season. Pseudoplatystoma species can grow to about 130 cm in total length and 100 Kg in weight and live until 30 years of age, depending upon the species. Biomass production and population dynamics of these catfishes have not yet been fully described. Their life-history characteristics indicate that they are periodic strategists with associated population recruitment dynamics. Population genetic patterning varies among Pseudoplatystoma species, with some degree of homing behavior and genetic differentiation among populations, indicating the need for management by applying the Management Unit and perhaps Evolutionary Significant Unit concepts. The main threats to the persistence of these catfishes are overfishing and alterations in and obstruction of river flow due to the construction of hydropower dams. After synthesizing existing information on species of the genus Pseudoplatystoma, we offer suggestions for future research to fill critical gaps in the knowledge of this group.

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First fossil record of Pseudoplatystoma corruscans (Siluriformes, Pimelodidae) from the late Pleistocene, Santa Fe, Argentina

Cited by 2 publications

References 13 publications

First Report of Vibrio vulnificus Outbreak in Farm-Raised Sorubim (Pseudoplatystoma sp.) from Brazil

First Report of Vibrio vulnificus Outbreak in Farm-Raised Sorubim (Pseudoplatystoma sp.) from Brazil

A Synthesis of the Ecology and Conservation of Pseudoplatystoma Catfishes in the Neotropics

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