Results 171 to 180 of about 1,930 (194)
Cytogenetic analyses of two Curimatidae species (Pisces; Characiformes) from the Paranapanema and Tietê Rivers [PDF]
Brazilian Journal of Biology, 2007 Cytogenetic analyses were performed in two Curimatidae species (Steindachnerina insculpta and Cyphocharax modesta) from the Paranapanema and Tietê Rivers (São Paulo State, Brazil), showing a karyotype composed of 54 meta-submetacentric chromosomes in both species. Silver- and chromomycyn-staining and fluorescent in situ hybridization (FISH) using a 18S
Fausto Foresti +2 more
exaly +8 more sources
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Three new species of Curimatopsis (Characiformes: Curimatidae) from the Amazon basin
Journal of Fish Biology, 2017Three new species of Curimatopsis are described from major tributaries of the Amazon basin. Curimatopsis guaporensis n. sp., from the Rio Madeira, belongs to the Curimatopsis evelynae clade and can be distinguished by the distinctive shape of the dark blotch on the caudal peduncle and by the position and shape of the nostrils.
Melo, B. F., Oliveira, C.
openaire +6 more sources
HISTOQUÍMICA DE OÓCITOS DE PEIXES DO GÊNERO STEINDACHNERINA (CHARACIFORMES: CURIMATIDAE)
Multidisciplinary Sciences Reports, 2023A literatura pouco fala a respeito da biologia reprodutiva do gênero Steindachnerina ou até mesmo da descrição histológica das células reprodutivas destes, caracterizando-os ou mesmo comparando suas atividades funcionais a outros órgãos ou sistemas. O objetivo desta pesquisa é descrever aspectos morfológicos, caracterizar os oócitos e comparar o ciclo ...
Joana Figueiredo da Mata +1 more
openaire +1 more source
Comparative Analysis of the Oocytes and Early Development of Two Species of Curimatidae Teleost Fish
Anatomia, Histologia, Embryologia, 2012Summary Curimatella lepidura and Steindachnerina elegans are small forage fish, constituting an important link in the food chain, serving as food for larger commercial fish. In this study, characteristics of the eggs, of the oocyte's surface ultrastructure and of the embryogenesis are first described for these species.
V R, Perini +3 more
openaire +2 more sources
Journal of Fish Biology, 2008
Neotropical Curimatidae fishes include 97 species in eight genera. Basic cytogenetic studies show a karyotype of 2n = 54 chromosomes in most species. Karyotype divergence of the nucleolus organizing regions between species has been reported, and these regions appear to be good cytotaxonomic markers.
Venere, Paulo Cesar +5 more
exaly +3 more sources
Neotropical Curimatidae fishes include 97 species in eight genera. Basic cytogenetic studies show a karyotype of 2n = 54 chromosomes in most species. Karyotype divergence of the nucleolus organizing regions between species has been reported, and these regions appear to be good cytotaxonomic markers.
Venere, Paulo Cesar +5 more
exaly +3 more sources
New Steindachnerina Species (Teleostei: Characiformes: Curimatidae) from the Rio Tocantins Drainage
Copeia, 2009Abstract A new species, Steindachnerina notograptos, is described from the middle portions of the Rio Tocantins drainage, Brazil. The possession of a small, fleshy, lobulate body situated on each side of the posterior limit of the medial fold of the buccopharyngeal complex is autapomorphic for S. notograptos.
Lucinda, Paulo H. F., Vari, Richard P.
openaire +2 more sources
Cytogenetic and genome research, 2016
B chromosomes are additional elements to standard karyotypes observed in different species of fishes, especially in Curimatidae. However, despite studies demonstrating the occurrence of Bs, little is known about their origin and evolution. To better understand the genomic composition and evolutionary processes involving B chromosomes, microdissection ...
Tatiane R, Sampaio +4 more
openaire +1 more source
B chromosomes are additional elements to standard karyotypes observed in different species of fishes, especially in Curimatidae. However, despite studies demonstrating the occurrence of Bs, little is known about their origin and evolution. To better understand the genomic composition and evolutionary processes involving B chromosomes, microdissection ...
Tatiane R, Sampaio +4 more
openaire +1 more source
Genome, 2014
The nucleolus is an important nuclear structure where transcription of ribosomal DNA (rDNA) takes place. During mitotic division, the nucleolus passes through different processes that inactivate rDNA transcription; in meiosis, its reassembly takes place during telophase II.
Tatiane R, Sampaio +3 more
openaire +2 more sources
The nucleolus is an important nuclear structure where transcription of ribosomal DNA (rDNA) takes place. During mitotic division, the nucleolus passes through different processes that inactivate rDNA transcription; in meiosis, its reassembly takes place during telophase II.
Tatiane R, Sampaio +3 more
openaire +2 more sources
Journal of Applied Ichthyology, 1990
Summary The effect was evaluated of benzocaine in Prochilodus lineatus juveniles using concentrations of 1:20,000, 1:15,000, 1:10,000 and 1:5,000 at 20 and 25°C in individuals weighing 5.5–26.6 g. Experiments showed that the optimum doses to obtain a complete stage of sedation were: 1:5,000 at 20°C and 1:10,000 at 25°C, which insure rapid and ...
openaire +1 more source
Summary The effect was evaluated of benzocaine in Prochilodus lineatus juveniles using concentrations of 1:20,000, 1:15,000, 1:10,000 and 1:5,000 at 20 and 25°C in individuals weighing 5.5–26.6 g. Experiments showed that the optimum doses to obtain a complete stage of sedation were: 1:5,000 at 20°C and 1:10,000 at 25°C, which insure rapid and ...
openaire +1 more source
Journal of Veterinary Medicine Series C: Anatomia Histologia Embryologia, 2023
Lucas Marcon +2 more
exaly
Lucas Marcon +2 more
exaly