Results 181 to 190 of about 1,276 (199)

Larval development of mandi‐pintado Pimelodus britskii (Siluriformes: Pimelodidae)

Journal of Fish Biology, 2019
This study investigated the morphology, morphometric and meristic characters of 117 larval Pimelodus britskii showing early development of head, eye, barbel and snout. Body and mouth pigmentation increased throughout development; the mouth was ventrally situated in the yolk‐sac stage, becoming subterminal afterwards, and an embryonic fin was visible in
Mara C. Almeida, Hugo J. Message, Paulo V. Sanches, Dirceu Baumgartner, Robie A. Bombardelli, Gilmar Baumgartner, Langeani Francisco   +6 more
openaire   +3 more sources

Ovarian follicle growth in the catfish Iheringichthys labrosus (Siluriformes: Pimelodidae)

Tissue and Cell, 2006
The morphofunctional organisation of the female reproductive system, the oocyte growth and the follicular envelope ultrastructure were studied by the first time in the catfish Iheringichthys labrosus from Upper Paraná River basin, Southeastern Brazil, in order to contribute to the knowledge of the reproductive behaviour strategies of this species.
J E, Santos, G E V, Padilha, O, Bomcompagni-Júnior, G B, Santos, E, Rizzo, N, Bazzoli   +5 more
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Early development of Brachyplatystoma juruense (Boulenger, 1898) (Siluriformes: Pimelodidae)

Zootaxa
The early development stages of Brachyplatystoma juruense (Boulenger) are described through morphological, meristic, and morphometric data, providing useful traits to identify its larvae and juveniles. Additionally, the growth pattern throughout the species’ development has been determined from the smallest specimen of 3.93 mm (flexion) to the largest ...
FABÍOLA KATRINE SOUZA DA SILVA, RUINERIS ALMADA CAJADO, LUCAS SILVA DE OLIVEIRA, DARLIANE CAMPOS DOS SANTOS, LEANDRO CORTES AVILA, DIEGO MAIA ZACARDI   +5 more
openaire   +2 more sources

Supernumerary chromosomes in a Rhamdia hilarii population (Pisces, Pimelodidae)

Genetica, 1990
A study was conducted on the chromosomes of a Rhamdia hilarii (Pisces, Pimelodidae) population. The results suggest that the basic chromosome number is 2n=58, with numerical variation up to a limit of 2n=63, due to the presence of supernumerary chromosomes which seem to be mitotically stable.
A. S. Fenocchio, L. A. C. Bertollo
openaire   +1 more source

The Karyotypic Diversification of Calophysines and theExallodontus-PropimelodusClade (Pimelodidae, Siluriformes): A Cytotaxonomic and Evolutionary Approach in Pimelodidae Based on Ancestral State Reconstruction

Zebrafish, 2019
Pimelodidae family is one of the most diverse and widely distributed fish groups in South America. Phylogenetic analysis in the family have recently indicated the existence of two main clades: "sorubiminae" and the OCP clade, including Pimelodus ornatus, "calophysines" and "pimelodines." The aim of this study was to investigate the karyotype of three ...
Terra, Mariana Costa, Takagui, Fábio Hiroshi, Baldissera, Joana Neres da Cruz, Feldberg, Eliana, Dias, Ana Lúcia   +4 more
openaire   +3 more sources

Complete mitochondrial genome of the Neotropical catfish Pseudoplatystoma magdaleniatum (Siluriformes, Pimelodidae)

Mitochondrial DNA Part A, 2015
The Neotropical freshwater fish Pseudoplatystoma magdaleniatum is a trans-Andean species that belongs to the family of long-whiskered catfishes (family Pimelodidae). In this study, the complete mitochondrial genome of P. magdaleniatum was sequenced using the MiSeq Illumina platform. The complete circular mitogenome is 16,568 bp in length, exhibiting an
Jose D, Rangel-Medrano, Juan F, Alzate, Edna J, Márquez   +2 more
openaire   +2 more sources

Isolation and characterization of microsatellite loci in Pimelodus maculatus (Siluriformes: Pimelodidae)

Molecular Ecology Resources, 2008
AbstractTo evaluate genetic variability in Pimelodus maculatus, a small migratory catfish common in South America, we isolated and characterized several microsatellite markers from individuals collected from a population in the River Grande (Brazil). A total of 11 loci were obtained and analyzed.
Ana Luiza B, Paiva, Evanguedes, Kalapothakis   +1 more
openaire   +2 more sources

On the type locality of Sorubim trigonocephalus Miranda-Ribeiro, 1920 (Siluriformes: Pimelodidae)

Zootaxa, 2016
Sorubim trigonocephalus was described in 1920 by Alípio de Miranda Ribeiro, based on a single specimen collected in a locality identified as “Porto Velho”, during the "Comissão das Linhas Telegráficas Estratégicas de Mato Grosso ao Amazonas” (more commonly known as Rondon Commission).
Willian Massaharu, Ohara, Emanuel Bruno, Neuhaus   +1 more
openaire   +2 more sources

Analyses of Nucleolus Organizer Regions and Heterochromatin of Pimelodus Maculatus (Pisces, Pimelodidae)

Genetica, 2000
Eighteen specimens of Pimelodus maculatus collected from Tibagi River (Sertaneja, PR, Brazil) were analyzed cytogenetically. The diploid number of 56 chromosomes was observed and karyotype was 20 M + 20 SM + 10 ST + 6 A with fundamental number (FN) of 106.
A C, Swarça, L, Giuliano-Caetano, A L, Dias   +2 more
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Ultrastructure of Sorubim lima (Teleostei, Siluriformes, Pimelodidae) spermiogenesis.

Journal of submicroscopic cytology and pathology, 2001
The spermiogenesis and the spermatozoon ultrastructure of Sorubim lima were studied. Our observations showed that early spermatids are round-shaped cells, have spherical nucleus with diffuse chromatin, small quantity of mitochondria and large amount of vesicles in the cytoplasm. During the differentiation process in the nucleus, chromatin compacts in a
Quagio Grassiotto, Irani, Carvalho, E. D.   +1 more
openaire   +1 more source