Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae)
Ancistrus is the most speciose genus of the tribe Ancistrini, with 58 valid species and many yet to be described. Cytogenetic studies were conducted on five apparently undescribed species from the Amazon basin, which showed different diploid numbers: Ancistrus sp. Purus (2n = 34); Ancistrus sp. Maco...
| Autor principal: | Oliveira, Renildo Ribeiro de |
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| Outros Autores: | Feldberg, Eliana, Anjos, Maeda Batista dos, Zuanon, Jansen |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Journal of Fish Biology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18376 |
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oai:repositorio:1-18376 |
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oai:repositorio:1-18376 Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) Oliveira, Renildo Ribeiro de Feldberg, Eliana Anjos, Maeda Batista dos Zuanon, Jansen Animals Catfish Classification Diploidy Female Genetics Histology Karyotyping Male Evolution, Molecular Sex Chromosome Animal Catfishes Diploidy Evolution, Molecular Female Karyotyping Male Sex Chromosomes Ancistrus Loricariidae Pisces Siluriformes Ancistrus is the most speciose genus of the tribe Ancistrini, with 58 valid species and many yet to be described. Cytogenetic studies were conducted on five apparently undescribed species from the Amazon basin, which showed different diploid numbers: Ancistrus sp. Purus (2n = 34); Ancistrus sp. Macoari (2n = 46); Ancistrus sp. Dimona (2n = 52); Ancistrus sp. Vermelho (2n = 42) and Ancistrus sp. Trombetas (2n = 38). All species possessed only one pair of NOR-carrying chromosomes, but with extensive variation in both the location on the chromosome as well as in the position of the ribosomal sites on the karyotype. The karyotypic evolution of Ancistrus species seems to be based on chromosomal rearrangements, with a tendency to a reduction of the diploid number. Two new instances of XX/XY sex chromosomes for Ancistrus species, based on the heteromorphism in the male karyotype, were also recorded. The large karyotypic diversity among Ancistrus species may be related to biological and behavioural characteristics of these fish that include microhabitat preferences, territoriality and specialized reproductive tactics. These characteristics may lead to a fast rate of fixation of chromosomal mutations and eventually speciation across the basin. © 2009 The Fisheries Society of the British Isles. 2020-06-15T21:54:18Z 2020-06-15T21:54:18Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/18376 10.1111/j.1095-8649.2009.02450.x en Volume 75, Número 9, Pags. 2209-2225 Restrito Journal of Fish Biology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Animals Catfish Classification Diploidy Female Genetics Histology Karyotyping Male Evolution, Molecular Sex Chromosome Animal Catfishes Diploidy Evolution, Molecular Female Karyotyping Male Sex Chromosomes Ancistrus Loricariidae Pisces Siluriformes |
| spellingShingle |
Animals Catfish Classification Diploidy Female Genetics Histology Karyotyping Male Evolution, Molecular Sex Chromosome Animal Catfishes Diploidy Evolution, Molecular Female Karyotyping Male Sex Chromosomes Ancistrus Loricariidae Pisces Siluriformes Oliveira, Renildo Ribeiro de Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| topic_facet |
Animals Catfish Classification Diploidy Female Genetics Histology Karyotyping Male Evolution, Molecular Sex Chromosome Animal Catfishes Diploidy Evolution, Molecular Female Karyotyping Male Sex Chromosomes Ancistrus Loricariidae Pisces Siluriformes |
| description |
Ancistrus is the most speciose genus of the tribe Ancistrini, with 58 valid species and many yet to be described. Cytogenetic studies were conducted on five apparently undescribed species from the Amazon basin, which showed different diploid numbers: Ancistrus sp. Purus (2n = 34); Ancistrus sp. Macoari (2n = 46); Ancistrus sp. Dimona (2n = 52); Ancistrus sp. Vermelho (2n = 42) and Ancistrus sp. Trombetas (2n = 38). All species possessed only one pair of NOR-carrying chromosomes, but with extensive variation in both the location on the chromosome as well as in the position of the ribosomal sites on the karyotype. The karyotypic evolution of Ancistrus species seems to be based on chromosomal rearrangements, with a tendency to a reduction of the diploid number. Two new instances of XX/XY sex chromosomes for Ancistrus species, based on the heteromorphism in the male karyotype, were also recorded. The large karyotypic diversity among Ancistrus species may be related to biological and behavioural characteristics of these fish that include microhabitat preferences, territoriality and specialized reproductive tactics. These characteristics may lead to a fast rate of fixation of chromosomal mutations and eventually speciation across the basin. © 2009 The Fisheries Society of the British Isles. |
| format |
Artigo |
| author |
Oliveira, Renildo Ribeiro de |
| author2 |
Feldberg, Eliana Anjos, Maeda Batista dos Zuanon, Jansen |
| author2Str |
Feldberg, Eliana Anjos, Maeda Batista dos Zuanon, Jansen |
| title |
Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| title_short |
Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| title_full |
Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| title_fullStr |
Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| title_full_unstemmed |
Mechanisms of chromosomal evolution and its possible relation to natural history characteristics in Ancistrus catfishes (Siluriformes: Loricariidae) |
| title_sort |
mechanisms of chromosomal evolution and its possible relation to natural history characteristics in ancistrus catfishes (siluriformes: loricariidae) |
| publisher |
Journal of Fish Biology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18376 |
| _version_ |
1787142607985442816 |
| score |
11.653393 |