Molecular data reveal a complex population genetic structure for Psalidodon scabripinnis (Teleostei: Characidae) in the Atlantic Rainforest, Brazil

Limeira, Daniel Meneguello; Santos, Mateus Henrique; Mateus, Rogério Pincela; Ruas, Claudete de Fátima; Almeida, Mara Cristina de; Filho, Orlando Moreira; Artoni, Roberto Ferreira

doi:10.1590/1678-4685-gmb-2021-0048

Cited by 3 publications

(1 citation statement)

References 52 publications

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“…The majority of these identifications suggest that BOLD:AAC5910 corresponds to the so-called P. scabripinnis species complex. Here we use the name P. scabripinnis for this widespread species, following Limeira et al (2022). The extensive geographic distribution of this species and future reexamination of type specimens may eventually require synonymizing several nominal species that are currently regarded as valid (e.g., P. paranae, P. rivularis).…”

Section: Discussionmentioning

confidence: 99%

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Dopazo¹,

Souto-Santos²,

Britto³

et al. 2023

Biota Neotrop.

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The region between the Brazilian Shield and the Atlantic Ocean is characterized by the presence of numerous hydrographic basins isolated by mountainous terrain that flow directly into the ocean without forming wide coastal plains. However, knowledge about the diversity and distribution of freshwater fish in several coastal areas is still incipient. One of these areas is the Costa Verde Fluminense region, situated between the municipalities of Mangaratiba and Paraty in the Brazilian State of Rio de Janeiro. In order to eliminate the gap of knowledge about the freshwater fish fauna of this region, we prepared a list of the species, and dichotomous identification keys and illustrations of all species. We examined material from expeditions carried out between 1942 and 2019, deposited in the Ichthyological Collection of the Museu Nacional, Universidade Federal do Rio de Janeiro, Brazil. The material comes from 29 continental coastal rivers and four drainages on Ilha Grande island. We recognized 54 fish species belonging to 16 families and 9 orders. The order Siluriformes was the most diverse with 18 species, followed by Characiformes with 14 species, Cyprinodontiformes with 10 species, Cichliformes with four species, Gobiiformes with three species, Syngnathiformes with two species, and Gymnotiformes, Salmoniformes and Synbranchiformes with one species each. These records include two putative undescribed species and four introduced species. Phalloceros anisophallos was the most widely distributed species, recorded in 24 drainages. More than a half (52 %) of the native species occur exclusively in coastal streams, demonstrating the importance of the area for biogeographic and conservation studies.

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Section: Discussionmentioning

confidence: 99%

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Dopazo¹,

Souto-Santos²,

Britto³

et al. 2023

Biota Neotrop.

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Astyanax caucanus: microsatellite loci development and population genetics in the Cauca River, Colombia

Velandia,

Campo-Nieto,

Márquez

2024

Hydrobiologia

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Astyanax caucanus is an endemic fish species to the Magdalena-Cauca basin in Colombia. It is considered a Least Concern species by the International Union for Conservation of Nature, and currently, it is not a fishery resource. Its fertilized eggs may drift up to 4–5 days before hatching and can be carried up to 340 km given the water velocity of the river. Although A. caucanus is listed as short -migratory species (< 50 km), this study hypothesized that it exhibits gene flow along the middle and lower section of the Cauca River due to the great potential for larval dispersal. To test this hypothesis, we developed a set of species-specific microsatellite primers suitable for population genetic studies. Genetic structure analyses with 193 samples evidenced two genetic stocks that coexist, comigrate, and exhibit gene flow along the study area. Both stocks show high genetic diversity indices (Na and HE) and effective population sizes (Ne > 1000), but also show evidence of bottlenecked populations and high values of the inbreeding coefficient (FIS). Finally, these results are useful to understand the effects of other anthropic activities, besides fishing pressure on population bottlenecks found for other fish species cohabiting the area.

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New parameters for in vitro development of cell lines of the species Astyanax bimaculatus (Linnaeus, 1758) and Geophagus proximus (Castelnau, 1855)

de Oliveira Furo,

Nogueira,

de Sousa

et al. 2024

Journal of Fish Biology

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Intending to compare in vitro cell growth in different conditions, we established cell cultures using fin biopsies of two freshwater fishes, Astyanax bimaculatus and Geophagus proximus. Three different culture media (Leibovitz–L‐15, Dulbecco's Modified Eagle Medium [DMEM], and 199) were employed, with or without the addition of AmnioMax, maintaining a standard temperature of 29°C. Based on the results obtained, we standardized a cell growth protocol in which medium 199 was less efficient for both species. Notably, G. proximus cells exhibited superior proliferation in DMEM and L‐15 media, whereas A. bimaculatus cells demonstrated better parameters exclusively in the DMEM medium. Successful subculturing of cells with good proliferation index was observed, accompanied by preserved morphological characteristics. Therefore, the methodology outlined in this study represents an advancement in establishing fish cell cultures.

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Molecular data reveal a complex population genetic structure for Psalidodon scabripinnis (Teleostei: Characidae) in the Atlantic Rainforest, Brazil

Cited by 3 publications

References 52 publications

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

The freshwater fishes from the Costa Verde Fluminense region of southeastern Brazil

Astyanax caucanus: microsatellite loci development and population genetics in the Cauca River, Colombia

New parameters for in vitro development of cell lines of the species Astyanax bimaculatus (Linnaeus, 1758) and Geophagus proximus (Castelnau, 1855)

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