Now showing items 1-10 of 76
A Streamlined DNA Tool for Global Identification of Heavily Exploited Coastal Shark Species (Genus Rhizoprionodon)
(PLOS ONE, 2012-04-09) [Artigo]
Obtaining accurate species-specific landings data is an essential step toward achieving sustainable shark fisheries. Globally distributed sharpnose sharks (genus Rhizoprionodon) exhibit life-history characteristics (rapid ...
Differential expression of a retrotransposable element, Rex6, in Colossoma macropomum fish from different Amazonian environments
(Mobile Genetic Elements, 2014) [Artigo]
Transposable elements (TEs) are DNA sequences that have the ability to move and replicate within the genomes. TEs can be classified according to their intermediates of transposition, RNA (retrotransposons) or DNA. In some ...
Chromosome differentiation patterns during cichlid fish evolution
(BMC Genetics, 2010-06-15) [Artigo]
Background: Cichlid fishes have been the subject of increasing scientific interest because of their rapid adaptive radiation which has led to an extensive ecological diversity and their enormous importance to tropical and ...
The B chromosome of the cichlid fish Haplochromis obliquidens harbors 18S rRNA genes
(BMC Genetics, 2012) [Artigo]
Genetic conservation of Brazilian fishes - Present state and perspectives
(Annual Review of Biomedical Sciences, 2004-12-01) [Artigo]
Natural environments have been worldwide affected by the growing impact of anthropogenic actions that promote the reduction or the extinction of several vertebrate species. Aquatic ecosystems represent one of the most ...
Cytogenetic studies in three species of Lutjanus (Perciformes: Lutjanidae: Lutjaninae) from the Isla Margarita, Venezuela
(Neotropical Ichthyology, 2008-03-01) [Artigo]
No presente estudo três espécies de Lutjaninae, Lutjanus analis, L. griseus e L. synagris foram analisadas através da coloração convencional com Giemsa, banda C e coloração com nitrato de prata para identificar as Regiões ...
How dynamic could be the 45S rDNA cistron? An intriguing variability in a grasshopper species revealed by integration of chromosomal and genomic data
(Chromosoma, 2019-06-04) [Artigo]
To better understand the structure and variability of the 45S rDNA cistron and its evolutionary dynamics in grasshoppers, we performed a detailed analysis combining classical and molecular cytogenetic data with whole-genome ...
Comparative cytogenetics of cichlid fishes through genomic in-situ hybridization (GISH) with emphasis on Oreochromis niloticus
(Chromosome Research, 2009-08-01) [Artigo]
Cichlidae is the most species-rich freshwater family of Perciformes and has attracted the attention of aquarium hobbyists, aquaculturists, and sport fisherman. Oreochromis niloticus is very important in aquaculture today ...
Screening and characterization of sex-specific DNA fragments in the freshwater fish matrinch, Brycon amazonicus (Teleostei: Characiformes: Characidae)
(Fish Physiology and Biochemistry, 2012-10-01) [Artigo]
The matrinch Brycon amazonicus, a commercially important freshwater fish resource, has no heteromorphic sex chromosomes so far described. In the present study, we performed a screening of sex-associated DNA markers in this ...
5S rDNA characterization in twelve Sciaenidae fish species (Teleostei, Perciformes): depicting gene diversity and molecular markers
(Genetics and Molecular Biology, 2008-01-01) [Artigo]
In order to extend the genetic data on the Sciaenidae fish family, the present study had the purpose to characterize PCR-generated 5S rDNA repeats of twelve species of this group through PAGE (Polyacrylamide Gel Electrophoresis) ...