Results 11 to 20 of about 1,276 (199)

Lethal temperatures for Rhamdia quelen larvae (Pimelodidae) Temperaturas letais de larvas de Rhamdia quelen (Pimelodidae) [PDF]

Ciência Rural, 2000
The lower and upper lethal temperatures (LT50) of R. quelen larvae were determined. The larvae were obtained from two spawning periods with hatching temperatures of 21 and 26ºC respectively.
Adriana Regina Chippari-Gomes, Levy Carvalho Gomes, Bernardo Baldisserotto   +2 more
doaj   +5 more sources

Cytogenetics of species of the families Pimelodidae and Rhamdiidae (Siluriformes) [PDF]

Genetics and Molecular Biology, 2000
Only 33 species among about 300 belonging to the families Pimelodidae and Rhamdiidae have been studied cytogenetically. The diploid number varies from 2n = 46 to 2n = 63 chromosomes, with the karyotypes often being of the meta/submetacentric type.
Swarça Ana Cláudia, Caetano Lucia Giuliano, Dias Ana Lúcia   +2 more
doaj   +4 more sources

Revision of genus Steindachneridion (Siluriformes: Pimelodidae) [PDF]

Neotropical Ichthyology, 2005
After several years collecting in the type-localities and studying representative samples of genus Steindachneridion Eigenmann & Eigenmann, 1919 from Brazilian and foreign museums, a taxonomic revision of the Recent species of the genus is presented ...
Julio Cesar Garavello
doaj   +3 more sources

Características hematológicas de teleósteos brasileiros: IV. Variáveis do jundiá Rhamdia quelen ( Pimelodidae) Haematological characteristics of brazilian teleosts: IV. Parameters of jundiá Rhamdia quelen (Pimelodidae)

Ciência Rural, 2002
As características hematológicas do jundiá Rhamdia quelen Quoy & Gaimard, 1824 (Osteichthyes: Pimelodidae), oriundo de cativeiro foram estudadas. Determinou-se o valor médio da contagem de eritrócitos, taxa de hemoglobina, hematócrito, volume corpuscular
Marcos Tavares-Dias, José Fernando Bibiano Melo, Gilberto Moraes, Flávio Ruas de Moraes   +3 more
doaj   +2 more sources

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]

Mol Ecol
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C, Reyes-Calderón A, Venail P, Britzke R, Santa-Maria MC, Araújo-Flores JM, Silman M, Fernandez LE.   +7 more
europepmc   +2 more sources

Cephalic Musculature of the Pacman Catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes, Pseudopimelodidae). [PDF]

J Morphol
The head of the Pacman catfish (Lophiosilurus alexandri [L. alexandri]) is strongly depressed, broad, and with a large mouth, roughly resembling those of Lophius piscatorius and Chaca bankanensis. Also, they are bottom dwellers and have ambush behavior for fish predation.
da Silva Marques R, Ohara I, Shibatta OA.   +2 more
europepmc   +2 more sources

Molecular phylogeny reveals a new species of ghost electric knifefish Porotergus Ellis 1912 (Gymnotiformes: Apteronotidae), from the Amazon basin. [PDF]

J Fish Biol
Abstract A new species of ghost electric knifefish, Porotergus sambaibensis sp. nov., is described from the Javaés River, a tributary of the Araguaia River in Brazil. The new species was assigned to the genus Porotergus as the closest relative to Porotergus gimbeli through maximum likelihood reconstruction of a concatenated multilocus dataset ...
Mendonça MB, Peixoto LAW, Chamon CC, Akama A, de Santana CD.   +4 more
europepmc   +2 more sources

Machine learning models accurately predict clades of proteocephalidean tapeworms (Onchoproteocephalidea) based on host and biogeographical data. [PDF]

Cladistics
Abstract Proteocephalids are a cosmopolitan and diverse group of tapeworms (Cestoda) that have colonized vertebrate hosts in freshwater and terrestrial environments. Despite the ubiquity of the group, key macroevolutionary processes that have driven the group's evolution have yet to be identified.
Vieira Alves P, da Silva RJ, Scholz T, de Chambrier A, Luque JL, Duchenko A, Janies D, Jacob Machado D.   +7 more
europepmc   +2 more sources

Integrative morphometric and molecular analyses reveal possible genetic contamination of silver catfish populations of the genus Rhamdia in Neotropical River basins. [PDF]

J Fish Biol
Abstract Rhamdia quelen, Rhamdia branneri and Rhamdia voulezi are morphologically similar species that, until recently, were considered synonymous. Although R. quelen has wide distribution in the Neotropical region, R. branneri and R. voulezi are sympatric and endemic species of the Iguaçu River basin.
Bignotto TS, de Souza HB, da Silva Bronzim RC, Maniglia TC, Baumgartner D.   +4 more
europepmc   +2 more sources

Cytogenetic characterization through chromosomic banding of Pinirampus pirinampu (Pisces, Pimelodidae) from the Tibagi river basin PR/Brazil [PDF]

Hereditas, 1999
Cytogenetic studies of three species of the Pimelodidae family were carried out. The results showed a diploid chromosome number of 2n = 46 for Pimelodellu spl, 2n = 52 for Pimelodellu sp2 and 2n = 50 for Pinirampus pirinumpu. Chromosome polymorphism was detected by of G-banding analysis in Pimeladella spl and by C-banding in P. pirinampu.
Ana Claúdia Swarça, Lúcia Giuliano-Caetano, Ana Lúcia Dias   +2 more
  +8 more sources