Chromosomal variability in the wild ornamental species of Symphysodon (Perciformes: Cichlidae) from Amazon
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چکیده
منابع مشابه
Chromosomal variability in the wild ornamental species of Symphysodon (Perciformes: Cichlidae) from Amazon
Cytogenetic studies were conducted on three discus species which inhabit the Amazon in Brazil: Symphysodon haraldi from Manacapuru, S. aequifasciatus from Tefé and S. discus from Barcelos. All individuals showed 2n=60 chromosomes, most of them biarmed. No sexual chromosomal heteromorphism was verified. However, different karyotypic formulae, owing to the presence of subtelocentric chromosomes, ...
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The discus fishes of the genus Symphysodon are popular ornamental cichlids that occur in floodplain lakes and flooded forests of the lowland Amazon Basin. These habitats are characterized by extreme seasonal fluctuations in the availability of food, shelter and dissolved oxygen, and also the densities of predators and parasites. Most aspects of discus biology are influenced by these fluctuating...
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Even though genetic aspects of some cichlids have been widely studied over the last decades, little is known about the genomic structure of Cichlidae when compared to the large number of species in the family. In this paper, the first chromosomal data for Cichlasoma sanctifranciscense Kullander, 1983 are presented and discussed based on cytotaxonomic and karyoevolutionary inferences on Cichlaso...
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ژورنال
عنوان ژورنال: Neotropical Ichthyology
سال: 2008
ISSN: 1679-6225
DOI: 10.1590/s1679-62252008000200005