Cytogenetic analysis in the incertae sedis species Astyanax altiparanae Garutti and Britzki, 2000 and Hyphessobrycon eques Steindachner, 1882 (Characiformes, Characidae) from the upper Paraná river basin

Martinez, Emanuel Ricardo Monteiro; Alves, Ana Liz Garcia; Silveira, Sara Martoreli; Foresti, Fausto; Oliveira, Cláudio

doi:10.3897/compcytogen.v6i1.1873

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…The yellow tail tetra (Astyanax altiparanae) has a wide distribution in South America (Martinez et al 2012) and therefore can be raised without the risk of introducing exotic species into the natural environment. This species has a great aquaculture potential due to its high reproductive rate, short production cycle (Porto-Foresti et al 2005) and omnivorous (Adrian et al 2001), while having a good acceptance of processed diets.…”

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confidence: 99%

Intestinal and liver morphometry of the Yellow Tail Tetra (Astyanax altiparanae) fed with oregano oil

Ferreira

Caldas

Salaro

et al. 2016

An. Acad. Bras. Ciênc.

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This study aimed to evaluate the effect of oregano oil on the intestinal and liver morphometry of yellow tail tetra, Astyanax altiparanae. Fish (1.46 ± 0.09 g) were kept in a 60-L aquaria, at a stocking density of 0.5 fi sh L -1 . Six diets containing varying amounts of oregano oil were evaluated (0.0; 0.5; 1.0; 1.5; 2.0 and 2.5 g of oregano oil kg -1 ). At the end of 90 days, the fi sh were euthanised. Four intestines and four livers were collected per treatment, which were fi xed in Bouin and embedded in resin. For height and width folds, the absorption surface area and thickness of the muscular layer a positive linear effect of oregano oil was observed. A decrescent linear effect on the total number of goblet cells was also observed. For the cytoplasmic percentage of hepatocytes and liver glycogen, a positive linear effect of oregano oil was observed. There was a decreasing linear effect on the percentage of nuclei in the hepatocytes and capillaries. Thus, the oregano essential oil promotes increased absorption areas, modulates the amount of goblet cells involved in protecting the intestinal mucosa and promotes cytoplasmic increase with greater deposition of liver glycogen in yellow tail tetra.

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confidence: 99%

Intestinal and liver morphometry of the Yellow Tail Tetra (Astyanax altiparanae) fed with oregano oil

Ferreira

Caldas

Salaro

et al. 2016

An. Acad. Bras. Ciênc.

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“…An interesting feature observed by C-band technique in the Hyphessobrycon eques was a heteromorphic block of heterochromatin always presents on short arm (pair 19) in all specimens (with and without B chromosomes), which another population of Hyphessobrycon eques studied by Martinez et al (2012) not showed. Nevertheless, we believe that the B chromosome (observed in two Hyphessobrycon eques females) may be related with chromosomal rearrangements (see a possible mechanism in the Figure 3).…”

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confidence: 90%

First description of B chromosomes in the Hyphessobrycon (Characiformes, Characidae) genus: a hypothesis for the extra element of Hyphessobrycon eques Steindachner, 1882

Piscor¹,

Parise-Maltempi²

2015

CCG

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The Hyphessobrycon are allocated in the incertae sedis group of the Characidae family, one of the genera with more species of the group. The chromosomes of some species of Hyphessobrycon are known, and the diploid number most common for genus is 2n = 50 chromosomes. The aims of this study were to examine the karyotype macrostructure in the Hyphessobrycon eques Steindachner, 1882, and show a new origin hypothesis for B chromosomes. The diploid number observed for Hyphessobrycon eques was 2n = 52 chromosomes, and a karyotype formulae of 12m + 18sm + 8st + 14a, with FN (fundamental number) = 90 for both sexes. Only two females showed one B chromosome. The heterochromatin was observed mainly on centromeric regions, and in the long arm of the B chromosome. In this paper, the relationship of the B chromosome of Hyphessobrycon eques with an occasional chromosome rearrangement was discussed.

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“…bimaculatus showed the same diploid number (2n=50) but with differences in the karyotype formulas, probably due to rearrangements such as pericentric inversions. This last group, unlike the "scabripinnis group", has shown a constancy in the diploid number (Domingues et al, 2007;Pamponet et al, 2008;Ferreira Neto et al, 2009;Kavalco et al, 2011;Pacheco et al, 2011;Peres et al, 2011;Martinez et al, 2012), indicating an evolutionary karyotype pattern relatively more conserved than that of the "scabripinnis complex". In turn, the distinct karyotypes presented by the two populations of A. asuncionensis also show the occurrence of two karyomorphs and a probable "asuncionensis complex."…”

Section: Discussionmentioning

confidence: 99%

Karyotypic diversity among three species of the genus Astyanax (Characiformes: Characidae)

et al. 2016

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The group Incertae sedis within the Characidae family currently includes 88 genera, previously included in the subfamily Tetragonopterinae. Among them is the genus Astyanax comprising a group of species with similar morphology and widely distributed in the Neotropics. Thus, the present study aimed to analyze the karyotype diversity in Astyanax species from different watersheds by conventional Giemsa staining, C-banding and fluorescence in situ hybridization (FISH rDNA 18S) probe.specimens of Astyanax aff. paranae belonging to the "scabripinnis complex", Astyanax asunsionensis and Astyanax aff. bimaculatus were analyzed". Two sympatric karyomorphs were observed in Astyanax. aff paranae, one of them having2n=48andthe other one with 2n=50 chromosomes. Other population of this same species also presented 2n=50 chromosomes, but differing in the karyotype formula and with macro supernumerary chromosome found in 100% of the cells in about 80%of females analyzed. Two population of A. asuncionensis and one population of Astyanax. aff. bimaculatus, also showed a diploid number of 50 chromosomes, but also differing in their karyotype formulas. Therefore, A. asuncionensis was also characterized by intraspecific chromosome diversity. The C-banding analysis was able to demonstrate a distinctable to demonstrate a distinct pattern of heterochromatin differing A. asuncionensis from Astyanax aff. paranae and Astyanax aff. bimaculatus. The supernumerary chromosome of Astyanax aff. paranae proved completely heterochromatic. Only Astyanax.aff. bimaculatus multiple showed multiple sites of nucleolar organizing regions. The other species were characterized by having a simple system of NOR. These data contributes to the know ledge of the existing biodiversity in our fish fauna, here highlighted by the inter-and intraspecific chromosomal diversity in the genus Astyanax.Keywords: cytogenetics, biodiversity, B chromosomes, C-bands, NORs. Diversidade Cariotípica entre três espécies do gênero

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Cytogenetic analysis in the incertae sedis species Astyanax altiparanae Garutti and Britzki, 2000 and Hyphessobrycon eques Steindachner, 1882 (Characiformes, Characidae) from the upper Paraná river basin

Cited by 17 publications

References 23 publications

Intestinal and liver morphometry of the Yellow Tail Tetra (Astyanax altiparanae) fed with oregano oil

Intestinal and liver morphometry of the Yellow Tail Tetra (Astyanax altiparanae) fed with oregano oil

First description of B chromosomes in the Hyphessobrycon (Characiformes, Characidae) genus: a hypothesis for the extra element of Hyphessobrycon eques Steindachner, 1882

Karyotypic diversity among three species of the genus Astyanax (Characiformes: Characidae)

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