Consulta: subjectFacets:"Multivariate morphometrics"
Registros recuperados: 5
Data/hora: 12/06/2024 16:22:04

A new species of Microglanis(Siluriformes: Pseudopimelodidae) from the upper rio Tocantins basin, Goiás State, Central Brazil
Provedor de dados: 83
Autores: Shibatta,Oscar Akio.
A new species of Microglanis is described from the upper rio Tocantins basin, Barro Alto, Goiás State, Brazil. This species is distinguished from the others by presenting a unique color pattern, consisting of round spots in the flank between the larger dark brown blotches. Moreover, it can be distinguished by the combination of the following features: caudal fin emarginate, the upper lobe slightly larger than the lower, lateral line relatively long, reaching vertical through posterior margin of the pelvic fin, and light stripe on supra-occipital region absent or very narrow and with irregular shape.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bumble-bee catfish; Multivariate morphometrics; Neotropical; Systematics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100081

Description of a new species of Microglanis (Siluriformes: Pseudopimelodidae) from the Amazon basin, Amazonas State, Brazil
Provedor de dados: 83
Autores: Jarduli,Lucas Ribeiro; Shibatta,Oscar Akio.
The first species of Microglanis from the rio Amazonas, Amazonas State, Brazil is described. This species differs from all congeners by the forked caudal fin, and color pattern of the supraoccipital region consisting of two elliptical and juxtaposed pale spots, besides a combination of morphometrics characters.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bumble-bee catfish; Multivariate morphometrics; Systematics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300507

Cryptic species of the genus Pimelodella (Siluriformes: Heptapteridae) from the Miranda River, Paraguay River basin, Pantanal of Mato Grosso do Sul, Central Brazil
Provedor de dados: 83
Autores: Souza-Shibatta,Lenice; Pezenti,Larissa Forim; Ferreira,Dhiego Gomes; Almeida,Fernanda Simões de; Sofia,Silvia Helena; Shibatta,Oscar Akio.
Specimens of Pimelodellacaptured in the Miranda River, Pantanal of Mato Grosso do Sul State, present morphological features that could indicate at least four species. Therefore, karyotype analysis and molecular biology provided evidence that they were only two species, one showing 2n = 46, and the other, 2n = 52 chromosomes, with only 18% genetic similarity. The morphological analysis evidenced that the dorsal filament is a male characteristic and that the upper lobe of the caudal fin was variable and might or might not be elongated in both species. With respect to morphometric characters, the formation of two groups was evident, but with a small overlap of specimens between them. Among the species with filaments on the dorsal fin observed in the Pantanal,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytotaxonomy; Cytogenetics; Multivariate morphometrics; RAPD.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100101

A new species of bumblebee catfish of the genus Microglanis (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil
Provedor de dados: 83
Autores: Shibatta,Oscar Akio.
ABSTRACT A new species of Microglanis from upper rio Paraguay basin is described. The species differs from congeners by the following combination of characters: deeply forked caudal fin with pointed lobes, bifurcated hook between antrorse and retrorse hooks on anterior margin of pectoral-fin spine, lateral line relatively long, surpassing the vertical through end of dorsal fin but not reaching adipose fin, color pattern of dorsal region of head dark brown with a restrict thin light area between anterior nostril and eye, broad light stripe on supraoccipital region.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microglanis carlae; Microglanis cottoides; Multivariate morphometrics; Pantanal; Systematics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300213

Variação geográfica de caracteres quantitativos em Ogcocephalus vespertilio (Linnaeus) (Teleostei, Lophiiformes, Ogcocephalidae)
Provedor de dados: 104
Autores: Cavalcanti,Mauro José; Lopes,Paulo Roberto Duarte.
Patterns of geographic variation in 10 morphometric characters were analyzed in a sample of 91 specimens of the batfish, Ogcocephalus vespertilio (L.), from the NE and SE Brazilian coast, using multivariate statistics and randomization tests. The specimens were ordinated by principal components analysis in two groups corresponding to the regions north and south of the 23ºC isotherm, and size variation was found to account for 70.3%, whereas shape differences accounted for 23.6% of the total variation in morphometric characters. The two groups were different at the 1% significance level by multivariate analysis of variance based on the Wilk's criterion, tested by a randomization procedure. Width of illicial cavity and distance from anus to anal fin were the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ogcocephalidae; Ogcocephalus; Geographic variation; Multivariate morphometrics; Randomization tests.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100010