Genetic Diversity of the Small Characid Fish Astyanax sp., and its Significance for Conservation

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

doi:10.1023/b:hydr.0000043303.02986.71

Cited by 25 publications

(23 citation statements)

References 4 publications

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“…These observations, together with the data obtained in the present study, restates the complex karyotypic structure that has been seen in different Astyanax samples. Matoso et al (2004), using RAPD-PCR molecular markers in Astyanax aff. fasciatus (cited as Astyanax sp.…”

Section: Et Al 2003) As Is Also Observed In Astyanax Scabripinnismentioning

confidence: 99%

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)

et al. 2006

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Four populations of Astyanax aff. fasciatus of the upper rio Tibagi (municipal district of Ponta Grossa, Paraná State, Brazil), had their karyotypes and morphometry analyzed. The cytogenetic data show the occurrence of distinct karyotypes (cytotypes), here named cytotype A, with 2n=48 chromosomes (6m+18sm+14st+10a), cytotype B, with 2n=50 chromosomes (8m+18sm+14st+10a) and cytotype C, with 2n=50 chromosomes (8m+18sm+14st+10a). The distribution pattern of the constitutive heterochromatin was very similar between cytotypes A and B, but diverged in relation to cytotype C. Distinct cytotypes may occur in sympatry in the upper rio Tibagi region, with the exception of the Furna 2 sample, which presents cytotype A exclusively. In addition, a specimen with 2n=49 chromosomes (7m+18sm+14st+10a) was also found and, by the characteristics presented, may be a consequence of a rare hybridization event between cytotypes A and B. The morphometric analyses of canonical variates indicate a consistent isolation of the Furna 2 sample, while the other samples seem to be superimposed, indicating a possible gene flow or even a recent isolation event. This model points to a probable complex of cryptic species in the studied region.Quatro populações de Astyanax aff. fasciatus do alto rio Tibagi (município de Ponta Grossa, Paraná, Brasil) foram citogeneticamente e morfometricamente analisadas. Os dados citogenéticos mostram a ocorrência de distintos cariótipos (citótipos), aqui nomeados citótipo A, com 2n=48 (6m+18sm+14st+10a), citótipo B, com 2n=50 (8m+18sm+14st+10a) e citótipo C, com 2n=50 cromossomos (8m+18sm+14st+10a). O padrão de distribuição da heterocromatina constitutiva foi muito similar entre os citótipos A e B, mas mostrou-se divergente em relação ao citótipo C. Citótipos distintos podem ocorrer em simpatria na região do alto rio Tibagi, com exceção da amostra da Furna 2, a qual apresenta somente o citótipo A exclusivamente. Além disso, um exemplar com 2n=49 cromoossomos (7m+18sm+14st+10a) foi também encontrado e, pelas características apresentadas, pode ser uma conseqüência de um raro evento de hibridização entre os citótipos A e B. As análises morfométricas de variáveis canônicas indicam um isolamento consistente da amostra da Furna 2 enquanto as demais amostras analisadas se apresentam sobrepostas indicando um possível fluxo gênico ou evento de isolamento recente. Este modelo aponta para um complexo de espécies crípticas na região estudada.

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Section: Et Al 2003) As Is Also Observed In Astyanax Scabripinnismentioning

confidence: 99%

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)

et al. 2006

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“…Unfortunately, very limited information on fish populations in Lake Laut Tawar is available. In many situations, genetic data are the best way to determine whether a species is worth a special protection under the Endangered Species Act (ESA) or other form of conservation status (Matoso et al 2004), as it allows calculated decisions on the best course of action to be taken for protection and conservation (Leuzzi et al 2004) as well as managing different stocks (Salini et al 2006).…”

mentioning

confidence: 99%

DNA Barcoding of Freshwater Fishes from Lake Laut Tawar, Aceh Province, Indonesia

Muchlisin¹,

Thomy²,

Fadli³

et al. 2013

Acta Icth et Piscat

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“…Several DNA techniques for evaluating genetic variability in fish species are available and are widely used (Harris et al, 1991;Mjolnerod et al, 1997;Coughlan et al, 1998;Wasko and Galetti, 2002;Barman et al, 2003;Jayasankar, 2004;Matoso et al, 2004). One such technique is the Random amplified polymorphic DNA (RAPD) which was first introduced by Williams et al, (1990).…”

Section: Introductionmentioning

confidence: 99%

Genetic relationship between five fish species of genus scarus using rapd assay

Almaaty

El-Regal

Marie

et al. 2015

Egypt. J. of Aquatic Biolo. and Fish.

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Scaridae fish species including Scarus psittacus, S. frenatus, S. genazonatus, S. fuscopurpureus and S. niger, were collected from Red Sea in Egypt. The DNA fingerprints of these species were identified using RAPD-PCR technique with eight decamer primers. A total of 93 bands were scored in all species using the selected primers, with the size range varying from 190 to 2500 bp. On average, each primer amplified 11.63 bands per species. Each species had both monomorphic and polymorphic DNA bands. The polymorphic bands represent 34.41% in all fish species. The highest similarity index (70%) was found between Scarus psittacus and S. frenatus, while the lowest one (51%) was between Scarus psittacus and S. niger, S. genazonatus and S. fuscopurpureus and S. genazonatus and S. niger. Therefore the phylogenetic relationships among the five studied scaridae species were clearly resolved in dendrogram, they were clustered into four clusters groups: the first one comprised, S. fuscopurpureus and S. niger, the second included S. psittacus, S. frenatus and S. genazonatus, the third included S. genazonatus and the fourth branch contained S. psittacus and S. frenatus. In conclusion, the obtained results exhibited that the five Scarus species are distinctive ones. In addation, the RAPD patterns are suitable tools to differentiate between fish species.

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Genetic Diversity of the Small Characid Fish Astyanax sp., and its Significance for Conservation

Cited by 25 publications

References 4 publications

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)

DNA Barcoding of Freshwater Fishes from Lake Laut Tawar, Aceh Province, Indonesia

Genetic relationship between five fish species of genus scarus using rapd assay

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