1
|
Apolinário-Silva C, Galindo BA, Nascimento RHC, Frantine-Silva W, Kotelok-Diniz T, Sofia SH, Ferreira DG. Fine-scale genetic structure of suckermouth Hypostomus ancistroides populations: the importance of Neotropical streams for fish conservation. Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
In the Neotropics, freshwater streams harbour high fish diversity and are constantly threatened by anthropogenic disturbance. However, there are few studies on the genetic diversity of fish populations inhabiting these streams. We aimed to assess, based on microsatellite and mitochondrial DNA markers, the population structure and genetic diversity of the suckermouth catfish, Hypostomus ancistroides, a Neotropical species widely distributed across the Upper Paraná River Basin in South America. Twenty-five locations were sampled, distributed across 18 sites in six tributary streams and another seven sites in the main river channel. Our analyses revealed a spatial heterogeneity in genetic diversity within the basin, indicating fine-scale genetic structuring. Samples from all streams showed exclusive haplotypes and private alleles, reinforcing the importance of preserving the tributaries for the conservation of the genetic diversity of the studied populations. The fine-scale genetic structuring of H. ancistroides is probably related to the limited displacement capacity of this species.
Collapse
Affiliation(s)
- Caroline Apolinário-Silva
- Departamento de Biologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR 86.057-970, Brazil
| | - Bruno Ambrozio Galindo
- Universidade Estadual do Norte do Paraná, Campus Cornélio Procópio, Cornélio Procópio, PR 86.300-000, Brazil
| | - Raul Henrique Cardoso Nascimento
- Departamento de Biologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR 86.057-970, Brazil
| | - Wilson Frantine-Silva
- Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnolgia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ 28.013-602, Brazil
| | - Thais Kotelok-Diniz
- Departamento de Biologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR 86.057-970, Brazil
| | - Silvia Helena Sofia
- Departamento de Biologia Geral, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, PR 86.057-970, Brazil
| | - Dhiego Gomes Ferreira
- Universidade Estadual do Norte do Paraná, Campus Cornélio Procópio, Cornélio Procópio, PR 86.300-000, Brazil
| |
Collapse
|
2
|
Zawadzki CH, Tencatt LFC, Britski HA. Taxonomic revision of Hypostomus albopunctatus (Siluriformes: Loricariidae) reveals a new piece of the Hypostomus jigsaw in the upper Rio Paraná basin. JOURNAL OF FISH BIOLOGY 2020; 96:230-242. [PMID: 31749168 DOI: 10.1111/jfb.14209] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 11/20/2019] [Indexed: 06/10/2023]
Abstract
Hypostomus albopunctatus was described from the Rio Piracicaba, a tributary of the Rio Tietê, upper Rio Paraná basin. Nevertheless, specimens attributed to this species are commonly found throughout other river systems in the upper Rio Paraná basin and present varying degrees of morphological variation. A taxonomic review of H. albopunctatus based on large series of specimens from many localities throughout the upper Rio Paraná basin was carried out. Results support H. lexi, H. niger and H. scaphyceps as junior synonyms. Hypostomus albopunctatus differs from all congeners except H. heraldoi by having pectoral-fin spine equal to or shorter than pelvic-fin spine (v. longer); it differs from H. heraldoi by having white or light yellow spots on the body and fins (v. dark brown or black spots). Despite conspicuous variation related to the shape and size of the spots and snout morphology, both spot and snout patterns overlapped among the examined populations, thus this variation was inferred to be intraspecific within a widely distributed H. albopunctatus.
Collapse
Affiliation(s)
- Cláudio H Zawadzki
- Departamento de Biologia. Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá, Maringá, Brazil
| | - Luiz F C Tencatt
- Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Coxim, Coxim, Brazil
| | | |
Collapse
|
3
|
Galindo BA, Ferreira DG, Almeida FS, Carlsson J, Sofia SH. Isolation and characterization of 13 polymorphic microsatellite loci in Hypostomus ancistroides (Teleostei, Loricariidae) and cross-amplification in related species. JOURNAL OF FISH BIOLOGY 2015; 86:1860-1866. [PMID: 25912318 DOI: 10.1111/jfb.12675] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 02/26/2015] [Indexed: 06/04/2023]
Abstract
This study details 13 novel polymorphic microsatellite loci in the armoured catfish Hypostomus ancistroides, and assesses their utility for population genetic studies. The analysis of 30 individuals revealed a total of 99 different alleles (ranging from two to 15 alleles per locus), with an average of 7·62 alleles per locus, with observed and expected heterozygosities ranging from 0·103 to 0·931 and from 0·102 to 0·906, respectively. One of the 13 loci showed significant deviations from Hardy-Weinberg equilibrium, probably due to the presence of null alleles, inferred from the excess of homozygotes.
Collapse
Affiliation(s)
- B A Galindo
- Laboratório de Genética e Conservação (GECON), Universidade Estadual do Norte Paraná, Rua Portugal, 340, Cornélio Procópio, PR 86300-000, Brazil
| | - D G Ferreira
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Rod. Celso Garcia Cid, km 380, Londrina, PR 86051-980, Brazil
| | - F S Almeida
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Rod. Celso Garcia Cid, km 380, Londrina, PR 86051-980, Brazil
| | - J Carlsson
- School of Biology and Environmental Science, UCD Science Education and Research Centre - West, University College Dublin, Dublin 4, Ireland
| | - S H Sofia
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Rod. Celso Garcia Cid, km 380, Londrina, PR 86051-980, Brazil
| |
Collapse
|
4
|
Genetic structure of a Neotropical sedentary fish revealed by AFLP, microsatellite and mtDNA markers: a case study. CONSERV GENET 2014. [DOI: 10.1007/s10592-014-0648-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
5
|
Tencatt LFC, Zawadzki CH, Froehlich O. Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae) from the rio Paraguay basin, with a redescription of Hypostomus cochliodonKner, 1854. NEOTROPICAL ICHTHYOLOGY 2014. [DOI: 10.1590/1982-0224-20130162] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hypostomus cochliodon group is a monophyletic clade of 20 valid species of Neotropical armored catfishes that is widely distributed throughout South America. Recently, specimens identified as H. cochliodon from the type locality and nearby localities were examined, and found to include representatives of more than one species. A redescription of H. cochliodon is provided, with a description of two new species, one from the Bodoquena Plateau and another from several localities of the rio Paraguay basin. A lectotype for H. cochliodon is designated herein, since the previous designation is invalid. Hypostomus cochliodon is diagnosed from all other species of the H. cochliodon group by having the opercle almost completely covered laterally by thick layer of skin, the absence of buccal papilla, weak to moderately developed keels on the lateral plates of the body and by the color pattern of its body and fins. Hypostomus basilisko, new species, is distinguished from the remaining species of the H. cochliodon group by the absence of spots on the body, highly developed keels and spoon-shaped teeth. Hypostomus khimaera, new species, is distinguished from the other species of the H. cochliodon group by having a dark tan stripe along the midline of the flank, black spots on the body and/or fins and teeth with mesial cusp and not spoon-shaped.
Collapse
|
6
|
Lucena ALM, Renesto E, Oliveira C, Mateus RP, Zawadzki CH. Genetic differentiation among ten populations of the genus Neoplecostomus (Teleostei: Loricariidae) from the upper Paraná River basin. BIOCHEM SYST ECOL 2012. [DOI: 10.1016/j.bse.2012.06.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
7
|
Bitencourt JA, Affonso PRAM, Giuliano-Caetano L, Carneiro PLS, Dias AL. Population divergence and peculiar karyoevolutionary trends in the loricariid fish Hypostomus aff. unae from northeastern Brazil. GENETICS AND MOLECULAR RESEARCH 2012; 11:933-43. [PMID: 22576920 DOI: 10.4238/2012.april.13.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Loricariidae (Siluriformes, Hypostominae) is one of the most diverse catfish families. In spite of the wide distribution of loricariids in South America, cytogenetic reports are available for only a few species, mostly from southern and southeastern Brazil. We made the first chromosomal analysis of Hypostomus aff. unae from the Contas River basin in northeastern Brazil. Four populations isolated by short distances but from distinct landscapes were studied based on conventional staining, C-banding, argyrophilic nucleolar organizer regions (Ag-NOR), CMA(3)/DAPI fluorochrome staining, and fluorescent in situ hybridization with 18S rDNA probes. Although sharing the same diploid number (2n = 76) and NOR locations, each population presented exclusive karyotype formulae and specific patterns of heterochromatic and AT-rich regions. The derived karyotypes of H. aff. unae (2n >54; high number of acrocentrics bearing AT-rich interstitial heterochromatin) indicated a divergent karyoevolution, mostly driven by centric fissions, pericentric inversions and particular heterochromatin dispersion models. This finding of distinct evolutionary units in H. aff. unae will be useful for understanding the natural history of loricariids from relatively unexplored coastal basins in South America.
Collapse
Affiliation(s)
- J A Bitencourt
- Departamento de Biologia Geral, Universidade Estadual de Londrina, PR, Brasil
| | | | | | | | | |
Collapse
|
8
|
Garavello JC, Britski HA, Zawadzki CH. The cascudos of the genus Hypostomus Lacépède (Ostariophysi: Loricariidae) from the rio Iguaçu basin. NEOTROPICAL ICHTHYOLOGY 2012. [DOI: 10.1590/s1679-62252012000200005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We reviewed several large collections of the genus Hypostomus from the rio Iguaçu basin summing up to 793 specimens mainly from the Laboratório de Ictiologia do Departamento de Ecologia e Biologia Evolutiva from Universidade Federal de São Carlos, from fish collection of Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura da Universidade Estadual de Maringá, and from the Museu de História Natural do Capão da Imbuia. Hypostomus albopunctatus, H. commersoni, H. derbyi, and H. myersi are redescribed and Hypostomus nigropunctatus is described as a new species. A practical key for identification of Hypostomus species from the rio Iguaçu is also provided.
Collapse
|
9
|
Rubert M, da Rosa R, Jerep FC, Bertollo LAC, Giuliano-Caetano L. Cytogenetic characterization of four species of the genus Hypostomus Lacépède, 1803 (Siluriformes, Loricariidae) with comments on its chromosomal diversity. COMPARATIVE CYTOGENETICS 2011; 5:397-410. [PMID: 24260644 PMCID: PMC3833761 DOI: 10.3897/compcytogen.v5i5.1589] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Accepted: 08/08/2011] [Indexed: 06/01/2023]
Abstract
Cytogenetic analyses were performed on fishes of the genus Hypostomus (Hypostomus ancistroides (Ihering, 1911), Hypostomus strigaticeps (Regan, 1908), Hypostomus regani (Ihering, 1905), and Hypostomus paulinus (Ihering, 1905)) from the seven tributaries of the Paranapanema River Basin (Brazil) by means of different staining techniques (C-, Ag-, CMA3- and DAPI-banding) and fluorescence in situ hybridization (FISH) to detect 18S rDNA sites. All species showed different diploid numbers: 2n=68 (10m+26sm+32st-a) in Hypostomus ancistroides, 2n=72 (10m+16sm+46st-a) in Hypostomus strigaticeps, 2n=72 (10m+18sm+44st-a) in Hypostomus regani and 2n=76 (6m+16sm+54st-a) in Hypostomus paulinus. Ag-staining and FISH revealed various numbers and locations of NORs in the group. NORs were usually located terminally on the subtelocentric/acrocentric chromosomes: on the long arm in Hypostomus strigaticeps (2 to 4) and Hypostomus paulinus (2); and on the short arm in Hypostomus ancistroides (2 to 8) and Hypostomus regani (2 to 4). Conspicuous differences in heterochromatin distribution and composition were found among the species, terminally located in some st-a chromosomes in Hypostomus ancistroides, Hypostomus strigaticeps, and Hypostomus paulinus, and interstitially dispersed in most st-a chromosomes, in Hypostomus regani. The fluorochrome staining indicated that different classes of GC and/or AT-rich repetitive DNA evolved in this group. Our results indicate that chromosomal rearrangements and heterochromatin base-pair composition were significant events during the course of differentiation of this group. These features emerge as an excellent cytotaxonomic marker, providing a better understanding of the evolutionary mechanisms underlying the chromosomal diversity in Hypostomus species.
Collapse
Affiliation(s)
- Marceléia Rubert
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, P.O. Box 676, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Renata da Rosa
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, Pr 445 Km 380, Campus Universitário, P.O. Box 6001, CEP 86051-970, Londrina, Paraná, Brazil
| | - Fernando Camargo Jerep
- Museu de Ciências e Tecnologia, Pontifícia Universidade Católica, Av. Ipiranga, 6681, P.O. Box 1429, CEP 90619-900, Porto Alegre, Rio Grande do Sul, Brazil
| | - Luiz Antônio Carlos Bertollo
- Departamento de Genética e Evolução, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, P.O. Box 676, CEP 13565-905, São Carlos, São Paulo, Brazil
| | - Lucia Giuliano-Caetano
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, Pr 445 Km 380, Campus Universitário, P.O. Box 6001, CEP 86051-970, Londrina, Paraná, Brazil
| |
Collapse
|
10
|
Reusing AF, Renesto E, Roxo FF, Zawadzki CH. Allozyme differentiation of two populations of the genus Neoplecostomus Eigenmann & Eigenmann, 1888 (Teleostei, Loricariidae) from the upper Paraná River basin, Brazil. Genet Mol Biol 2011; 34:496-501. [PMID: 21931525 PMCID: PMC3168193 DOI: 10.1590/s1415-47572011005000028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 03/30/2011] [Indexed: 11/21/2022] Open
Abstract
Allozyme electrophoresis was used to examine 12 enzymatic systems in two populations of the genus Neoplecostomus from the Paraná River basin. Samples of Neoplecostomus sp. 1 were collected in Paraitinguinha stream of the Tietê River basin, in the municipality of Salesópolis, São Paulo State, and those of Neoplecostomus sp. 2 from São Domingos stream of the Rio Grande River basin, in the municipality of Muzambinho, Minas Gerais State. The genetic variability of the two populations was estimated by Nei’s expected heterozygosity and was considered lower than average for populations of freshwater fish. The proportion of polymorphic loci was low (only 5.26% for the locus Idh). The low frequency of heterozygosity for both populations revealed a high fixation of alleles for each locus. Homozygote excess was observed in both populations. The values of Nei’s genetic identity and the presence of loci with different allele frequencies in both populations may imply that the two populations belong to different species. The genetic variability between populations was compared to other data for loricariids.
Collapse
Affiliation(s)
- Ana Flávia Reusing
- Pós-Graduação em Genética e Melhoramento, Universidade Estadual de Maringá, Maringá, PR, Brazil
| | | | | | | |
Collapse
|
11
|
Limeira DM, Renesto E, Zawadzki CH. Allozyme comparison of two populations of Rineloricaria (Siluriformes, Loricariidae) from the Ivaí River, upper Paraná River basin, Brazil. Genet Mol Biol 2009; 32:431-5. [PMID: 21637702 PMCID: PMC3036927 DOI: 10.1590/s1415-47572009005000022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Accepted: 10/07/2008] [Indexed: 11/29/2022] Open
Abstract
Two allopatric morphotypes of the genus Rinelocaria were compared through the allozyme electrophoresis technique: one morphotype, R. pentamaculata, from the Keller River in the middle stretch of the Ivaí River basin and the other, R. aff. pentamaculata, from the São João River in the upper portion of the Ivaí River basin. The morphotype from the São João River was collected upstream from the São João waterfall, which is about 80 m deep. Twelve enzymatic systems (AAT, ADH, EST, GCDH, G3PDH, GPI, IDH, LDH, MDH, ME, PGM and SOD) were analyzed, which allowed to score 22 loci. Only lociAat-2, Est-3 and Mdh-C showed polymorphism. The two samples differed in allele frequencies at the three polymorphic loci. The average expected heterozygosity for all loci was 0.0806 ± 0.0447 in the Keller River sample. For the São João River morphotype, this value was 0.0489 ± 0.0350. Nei' s genetic identity and distance between the two populations were respectively 0.9789 and 0.0213. Wright's FIS , FIT and FST over all loci were estimated as 0.3121, 0.4021 and 0.1309, respectively. We consider that the two morphotypes represent species in statunascendi.
Collapse
Affiliation(s)
- Daniel M Limeira
- Curso de Pós-graduação em Genética e Melhoramento, Universidade Estadual de Maringá, Maringá, PR Brazil
| | | | | |
Collapse
|
12
|
Philippsen JS, Renesto E, Gealh AM, Artoni RF, Shibatta OA, Zawadzki CH. Genetic variability in four samples of Neoplecostomus yapo (Teleostei: Loricariidae) from the rio Paranapanema basin, Brazil. NEOTROPICAL ICHTHYOLOGY 2009. [DOI: 10.1590/s1679-62252009000100004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Four samples of Neoplecostomus yapo were analyzed through the allozyme electrophoresis technique in corn starch gel. The allozyme pattern was similar to those found in N. paranensis with 24 loci scored. Two samples (ribeirão Atlântico and ribeirão Uraí) showed monomorphic bands for all 24 loci, whereas the other two (rio Verde and rio Fortaleza) showed 8.3% of polymorphic loci. The He genetic variability estimates for the rios Verde and Fortaleza populations were 0.0195 and 0.0179, respectively, too much inferior to the mean heterozygosity summed to species from the whole world (0.051). The Wright statistical values F IS = 0.5181, F IT = 0.5681 and F ST = 0.1039 and the genetic distance of Nei values showed that the four samples are genetically very similar to each other and that there is homozygote excess in the polymorphic loci.
Collapse
|
13
|
Rezende JR, Renesto E, Zawadzki CH. Genetic variability in three species of Gymnotus Linnaeus, 1758 (Gymnotiformes: Gymnotidae) from Caracu stream of the upper Paraná River basin, Brazil. NEOTROPICAL ICHTHYOLOGY 2009. [DOI: 10.1590/s1679-62252009000400010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The genetic variability of three Gymnotus species from the Caracu stream, a small tributary of the left margin of Paraná River (Brazilian upper Paraná River floodplain), was estimated with data of 17 putative allozyme loci, which were obtained by using corn starch gel electrophoresis of 10 enzymatic systems: Aspartate aminotransferase (E. C. 2.6.1.1), Alcohol dehydrogenase (E. C. 1.1.1.1), Esterase (E. C. 3.1.1.1), Glucose dehydrogenase (E. C. 1.1.1.118), Glycerol-3-phosphate dehydrogenase (E. C. 1.1.1.8), Isocitrate dehydrogenase (E. C. 1.1.1.42), L-Lactate dehydrogenase (E. C. 1.1.1.27), Malate dehydrogenase (E. C. 1.1.1.37), Superoxide dismutase (E. C. 1.15.1.1) and Sorbitol dehydrogenase (E. C. 1.1.1.14). The genetic diversity was estimated as He = 0.3458 for G. pantanal, He = 0.2481 for G. inaequilabiatus, and He = 0.3152 for G. sylvius. The most divergent species were G. sylvius and G. pantanal (D = 0.117), and the most similar were G. inaequilabiatus and G. pantanal (D = 0.051). The data indicates that the observed genetic variability was very low and the expected variability estimated for these three species is very high, and the genetic differences among them are small. The data suggest that the process of speciation which produced these three species is recent.
Collapse
|
14
|
Allozyme Analysis of Hypostomus (Teleostei: Loricariidae) from the Rio Corumbá, Upper Rio Paraná Basin, Brazil. Biochem Genet 2008; 46:755-69. [DOI: 10.1007/s10528-008-9191-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2007] [Accepted: 07/29/2008] [Indexed: 11/26/2022]
|
15
|
Rubert M, Zawadzki CH, Giuliano-Caetano L. Cytogenetic characterization of Hypostomus nigromaculatus (Siluriformes: Loricariidae). NEOTROPICAL ICHTHYOLOGY 2008. [DOI: 10.1590/s1679-62252008000100011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hypostomus is the most speciose genus in the family Loricariidae, with approximately 120 species. These fish show a wide morphological and color variation, which hinders the identification of species, mainly of widely distributed representatives. The aim of this study was to contribute to the current knowledge on cytogenetic features of Hypostomus nigromaculatus. Three specimens of H. nigromaculatus, collected in two tributaries of rio Tibagi, Paraná, and in Cachoeira de Emas, rio Mogi-Guaçu, São Paulo, the latter being the type locality of H. nigromaculatus, were studied. Chromosomal preparations were submitted to Giemsa staining, silver nitrate impregnation, C-banding and CMA3 and DAPI fluorochromes staining. All samples presented 2n = 76, but the rio Mogi-Guaçu sample differed from those from tributaries of rio Tibagi in relation to karyotype formulae, distribution and composition of heterochromatin, and NOR location. The silver nitrate staining revealed the presence of multiple Ag-NORs for all samples, but with differences on the location on chromosomes. CMA3 staining reveled bright signals equivalent to NOR-bearing chromosomal segments; such sites were characterized by negative, i.e. unstained, marks after DAPI staining. The pattern of heterochromatin distribution was distinctive among samples from rio Mogi-Guaçu and tributaries of rio Tibagi. The differences observed between the sample from rio Mogi-Guaçu and the ones from tributaries of rio Tibagi allow us to suggest that these samples are presently isolated. Further analyses are necessary to ascertain whether such isolation refers to distinct populations or characterizes true different species.
Collapse
|
16
|
Zawadzki CH, Renesto E, Peres MD, Paiva S. Allozyme variation among three populations of the armored catfish Hypostomus regani (Ihering, 1905) (Siluriformes, Loricariidae) from the Paraná and Paraguay river basins, Brazil. Genet Mol Biol 2008. [DOI: 10.1590/s1415-47572008000400025] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
17
|
Zawadzki CH, Weber C, Pavanelli CS. Two new species of Hypostomus Lacépède (Teleostei: Loricariidae) from the upper rio Paraná basin, Central Brazil. NEOTROPICAL ICHTHYOLOGY 2008. [DOI: 10.1590/s1679-62252008000300013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new species of Hypostomus Lacépède (Teleostei: Loricariidae) from the rio Paranaíba and rio Grande basins, both in the upper rio Paraná basin, central Brazil, are described herein. One of them is distinguished from all congeners, except H. albopunctatus, by having the pectoral-fin spine length equal to or smaller than the pelvic-fin spine. From H. albopunctatus, it is distinguished by having round dark spots (vs. pale) on body and fins. The second species is distinguished from all congeners, except H. multidens and H. ternetzi, by having more than 115 teeth (vs. less than 109) per ramus on dentary and premaxilla. It is distinguished most readily from H. ternetzi by having teeth with two symmetrical (vs. asymmetrical) cusps. It is distinguished from H. multidens by having round dark spots (vs. pale) over body and fins.
Collapse
|
18
|
Zawadzki CH, Birindelli JLO, Lima FCT. A new pale-spotted species of Hypostomus Lacépède (Siluriformes: Loricariidae) from the rio Tocantins and rio Xingu basins in central Brazil. NEOTROPICAL ICHTHYOLOGY 2008. [DOI: 10.1590/s1679-62252008000300012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new species of the genus Hypostomus Lacépède (Siluriformes, Loricariidae) from rio Tocantins and rio Xingu basins in central Brazil, is described. The new species is distinguished from its congeners by a unique combination of pale blotches over a darker background on head, body and fins, and conspicuous keels on head, predorsal region and lateral plates. Comments on the pale-spotted species of Hypostomus are provided.
Collapse
|
19
|
Sofia SH, Galindo BA, Paula FM, Sodré LM, Martinez CB. Genetic diversity of Hypostomus ancistroides (Teleostei, Loricariidae) from an urban stream. Genet Mol Biol 2008. [DOI: 10.1590/s1415-47572008000200027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
20
|
Allozyme differentiation and relationships within Hypostomus Lacépède, 1803 (Osteichthyes: Loricariidae) from the upper Paraguay River basin, Brazil. BIOCHEM SYST ECOL 2007. [DOI: 10.1016/j.bse.2007.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
21
|
Jerep FC, Shibatta OA, Zawadzki CH. A new species of Hypostomus Lacépède, 1803 (Siluriformes: Loricariidae) from the upper rio Paraná basin, Southern Brazil. NEOTROPICAL ICHTHYOLOGY 2007. [DOI: 10.1590/s1679-62252007000400002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new species of Hypostomus with large and spaced light roundish spots is described from the upper rio Paraná basin. Hypostomus multidens new species is distinguished from all remaining congeners with light spots on a darker background by two independent characters: the presence of teeth with two symmetrical cusps, and a high tooth number in each dentary (122267, mean 196.8) and premaxilla (115-260, mean 190.8).
Collapse
|
22
|
Lassala MDP, Renesto E. Reproductive strategies and genetic variability in tropical freshwater fish. Genet Mol Biol 2007. [DOI: 10.1590/s1415-47572007000400030] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
23
|
Peres MD, Vasconcelos MDS, Renesto E. Genetic variability in Astyanax altiparanae Garutti & Britski, 2000 (Teleostei, Characidae) from the Upper Paraná River basin, Brazil. Genet Mol Biol 2005. [DOI: 10.1590/s1415-47572005000500011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | - Erasmo Renesto
- Universidade Estadual de Maringá, Brazil; Universidade Estadual de Maringá, Brazil
| |
Collapse
|