2008
DOI: 10.1590/s1679-62252008000100012
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Cytogenetic studies in three species of Lutjanus (Perciformes: Lutjanidae: Lutjaninae) from the Isla Margarita, Venezuela

Abstract: In the present study, three species of Lutjaninae, Lutjanus analis, L. griseus and L. synagris, were analyzed by conventional Giemsa staining, C-banding and silver staining, to reveal active Nucleolus Organizer Regions (NORs). Fluorescent in situ hybridization (FISH) was also applied to establish the number and location of the ribosomal gene clusters (18S and 5S rRNA genes). Counts of diploid metaphasic cells revealed a diploid modal chromosome complement composed of 48 acrocentric chromosomes in both L. anali… Show more

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Cited by 19 publications
(24 citation statements)
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References 21 publications
(25 reference statements)
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“…It is worth noting that specimens of L. synagris from Brazil (Rocha & Molina, 2008) do not show any biarmed chromosome. The pattern of the heterochromatin distribution observed in O. chrysurus and R. aurorubens confirms that a limited presence of heterochromatic blocks at the centromeres of all chromosomes is a general characteristic of Lutjanidae, as this pattern is shared by all the 11 species investigated in this sense (Table 1), including those species for which more than one population has been studied, such as L. analis, L. synagris (Nirchio et al, 2008;Rocha & Molina, 2008) and O. chrysurus (Rocha & Molina, 2008;this paper). This evidence suggests that heterochromatinization processes have not played an important role in the karyotypic evolution of Lutjanidae.…”
Section: Resultssupporting
confidence: 65%
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“…It is worth noting that specimens of L. synagris from Brazil (Rocha & Molina, 2008) do not show any biarmed chromosome. The pattern of the heterochromatin distribution observed in O. chrysurus and R. aurorubens confirms that a limited presence of heterochromatic blocks at the centromeres of all chromosomes is a general characteristic of Lutjanidae, as this pattern is shared by all the 11 species investigated in this sense (Table 1), including those species for which more than one population has been studied, such as L. analis, L. synagris (Nirchio et al, 2008;Rocha & Molina, 2008) and O. chrysurus (Rocha & Molina, 2008;this paper). This evidence suggests that heterochromatinization processes have not played an important role in the karyotypic evolution of Lutjanidae.…”
Section: Resultssupporting
confidence: 65%
“…This study continues a cytogenetic survey of Venezuelan snappers (Nirchio et al, 2008, Table 1) by extending the investigation to the two monotypic genera, Ocyurus and Rhomboplites, which, along with Lutjanus, represent the three genera of Lutjaninae, with a total of 12 species, existing in Venezuela (Cervigón, 1993). The two monotypic species, Ocyurus chrysurus, the yellowtail snapper, and Rhomboplites aurorubens, the vermilion snapper, have an almost overlapping western Atlantic distribution, extending southwards from Massachusetts, USA, and Bermuda to southeastern Brazil, including the Gulf of Mexico and Caribbean Sea (Allen, 1985;Froese & Pauly, 2008).…”
Section: Introductionmentioning
confidence: 75%
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“…Hybridization was recorded in a number of lutjanid species, such as L. synagris and O. chrysurus (Domeier andClarke 1992, Loftus 1992). Recent analyses (Rocha and Molina 2008, Nirchio et al 2008, 2009) have confirmed that the chromosomic constitution of the lutjanids, including species of the genera Lutjanus, Ocyurus, and Rhomboplites, is highly conserved, which would permit introgressive hybridization or hybridization. At the moment, however, there is no evidence of such hybridization in the red snappers.…”
Section: Demographic Historymentioning
confidence: 99%