Preliminary qualitative analysis on mtDNA in Astyanax fasciatus populations Cuvier, 1819 (Teleostei; Characidae) indicate population distinctiveness

Matoso, Daniele Aparecida; Martins, Cesar; Artoni, Roberto Ferreira; Galetti, Pedro M.

doi:10.1590/s1516-89132010000300022

Cited by 5 publications

(3 citation statements)

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“…Thus, inbreeding and restricted gene flow (Artoni et al, 2006) would greatly elevate extinction risk in this population. Also, loss of genetic diversity has been reported in Furna 2 using the D-loop mtDNA region and RAPD markers (Matoso, Artoni & Galleti Jr, 2004;Matoso et al, 2010), when compared to populations with gene flow.…”

Section: Discussionmentioning

confidence: 99%

Spinal malformations in a naturally isolated Neotropical fish population

Kerniske

Castro

Ossa-Guerra

et al. 2021

PeerJ

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Fish populations that reside in completely isolated freshwater ecosystems are rare worldwide. The Vila Velha State Park (VVSP), located in southern Brazil, is recognized for its arenitic formations called sinkholes (furnas), which are completely isolated. Fish populations within, such as those of Psalidodon aff. fasciatus, often develop vertebral malformations due to this isolation from other conspecifics and other species. In this study, we analyzed geometric morphology in digital radiographs to identify congenital deformations of Psalidodon aff. fasciatus in Furna 2 of VVSP. We found many fish with spinal deformities, including wide variation in the number of caudal vertebrae and corporal deformations related to a flattened body and spinal curvature. Females were more affected than males. We also demonstrated that these deformations reflect inbreeding and an absence of gene flow in the population. In conclusion, isolated populations such as fish species in furnas are potential models for evo-devo research.

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Section: Discussionmentioning

confidence: 99%

Spinal malformations in a naturally isolated Neotropical fish population

Kerniske

Castro

Ossa-Guerra

et al. 2021

PeerJ

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“…Tibagi River has a relatively high species abundance, especially composed of small-sized species, where the Psalidodon aff. fasciatus (Cuvier, 1819) figures as one of the most abundant ones (Galvis et al, 1997;Matoso et al, 2010). This is a smallsized Characidae species that lives in streams and low-flow rivers under intermediate population densities (Matoso et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…fasciatus (Cuvier, 1819) figures as one of the most abundant ones (Galvis et al, 1997;Matoso et al, 2010). This is a smallsized Characidae species that lives in streams and low-flow rivers under intermediate population densities (Matoso et al, 2010). It is popularly known as "lambari-do-rabo-vermelho" ("red-tail minnow") or "piaba" because of its morphological characteristics of red colors in the caudal fin (Garcia et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Diet of Psalidodon aff. fasciatus (Cuvier, 1819) (Teleostei: Characidae) in a neotropical river before reservoir formation

Fonseca¹,

Baumgartner²,

Maciel³

et al. 2023

Bol. Inst. Pesca

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The main objective of this study was to identify spatial and seasonal variations on the diet of Psalidodon aff. fasciatus from the Tibagi River (South Brazil) before the construction of the Tibagi Montante hydropower plant. Fish were collected quarterly between October 2017 and July 2019. 536 stomachs containing feeding items and identified to the lowest taxonomic level as possible have been analyzed. Results showed that plants, Hymenoptera, and insect parts in general were the most consumed items. The analysis of feeding strategy showed a diet based on rare items but with individuals varying among specialist, generalist, and opportunistic trends depending on the season. The non-metric multidimensional scaling (NMDS) revealed diet overlap in both spatial and seasonal terms, which was confirmed by the permutational analysis of variance (PERMANOVA). The indicator value analysis (IndVal) identified 15 items as the most important components of this species’ diet such as superior plants, Hymenoptera and insect parts. Therefore, before the formation of the reservoir, P. aff. fasiatus could be characterized as predominantly herbivore with a strong trend for insectivory. Across seasons, this species had a specialized diet all year, although with more specialized preferences in the spring when the consumption of plants was increased.

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