Results 231 to 240 of about 5,672 (255)

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

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

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 ...
Silva, Fabíola Katrine Souza Da, Cajado, Ruineris Almada, Oliveira, Lucas Silva De, Santos, Darliane Campos Dos, Avila, Leandro Cortes, Zacardi, Diego Maia   +5 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
openaire   +2 more sources

Revision of the catfish family Pimelodidae (Teleostei: Siluriformes) of Bolivia

Neotropical Hydrobiology and Aquatic Conservation
This review provides an updated list, morphological characterization, and an artificial dichotomous key for identifying Pimelodidae fish species of Bolivia. 346 specimens deposited in the UMSS–Museo d’Orbigny Ichthyological Collection (Cochabamba, Bolivia) were examined. The morphological characterization was based on 41 measurements.
Hitomi Torrico Destre, Matias Careaga, Fernando Carvajal-Vallejos, Mabel Maldonado   +3 more
openaire   +1 more source

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

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

Threatened fishes of the world: Pimelodella kronei (Ribeiro, 1907) (Pimelodidae)

Environmental Biology of Fishes, 1997
Common names: Bagre cego (Port.), blind catfish (E). Conservation status: Endangered (some populations), vulnerable (others). Identification: Troglobite (fish species restricted to a subterranean habitat). Differs from the epigean catfish Pimelodella transitoria as a result of the regression of the eyes and pigmentation, and slightly shorter dorsal ...
openaire   +1 more source

Convergent adaptations to cave life in the Rhamdia laticauda catfish group (Pimelodidae, Teleostei)

Environmental Biology of Fishes, 2001
The nocturnal Mexican catfish Rhamdia laticauda (Pimelodidae, Teleostei) is the surface sister species of a number of cave species. Comparison between two of them, R. zongolicensis and R. reddelli, reveals an intermediate state of reduction of the biologically functionless eyes, melanin pigmentation and the negative phototactic behavior.
openaire   +1 more source

Chromosomal organization of repetitive DNA in Sorubim lima (Teleostei; Pimelodidae).

Cytogenetic and genome research, 2014
Interspaced repetitive DNA elements and segmental duplications have been extensively analyzed in fishes through physical chromosome mapping methods, providing a better comprehension of the structure and organization of the genome of this group. In order to contribute to this scenario, a sequence integration study of different classes of repetitive DNA ...
T S, Sczepanski, M R, Vicari, M C, de Almeida, V, Nogaroto, R F, Artoni   +4 more
openaire   +1 more source