Results 51 to 60 of about 378 (145)

Macroevolutionary consequences of karyotypic changes in the neotropical Serrasalmidae fishes (Ostariophysi, Characiformes) diversification

Genetica, 2023
Abstract In the Neotropical region, one of the most diverse families of freshwater fishes is the monophyletic Serrasalmidae. Karyotypically, the family shows high diversity in chromosome numbers (2n = 54 to 64). However, little is discussed about whether the chromosomal changes are associated with cladogenetic events within this family.
Uedson Pereira, Jacobina, Alany Itala, Pontes, Lucas, Costa, Gustavo, Souza   +3 more
openaire   +2 more sources

Invasão da piranha Serrasalmus marginatus Valenciennes, 1847 no alto rio Paraná, Brasil (Osteichthyes, Serrasalmidae)

Acta Scientiarum: Biological Sciences, 2008
A construção da barragem de Itaipu, 150 km a jusante do salto de Sete Quedas, resultou no afogamento da barreira geográfica natural, com conseqüente mistura das ictiofaunas.
Carlos Sérgio Agostinho, Horácio Ferreira Júlio Junior   +1 more
doaj   +1 more source

OS ARGULÍDDEOS (CRUSTACEA: BRANCHIURA) DA AMAZÔNIA BRASILEIRA 3. ASPECTOS DA ECOLOGIA DE DOLOPS STRIATA BOUVIER, 1899 E DOLOPS CARVALHOI CASTRO, 1949 . [PDF]

Acta Amazonica, 1983
Resumo A especificidade parasitária, áreas de fixação, hospedeiros naturais, índices de infestação e variação sazonal de Dolops striata e Dolops carvalhoi foram estudados durante o período de março de 1979 a março de 1980, na área do Janauacá, um lago de
José Celso de Oliveira Malta, Angela Varella   +1 more
doaj   +1 more source

Low Genetic Diversity and Complex Population Structure in Black Piranha (Serrasalmus rhombeus), a Key Amazonian Predator. [PDF]

Ecol Evol
Using a Genotyping‐by‐Sequencing approach across tributaries in the central Amazonia, we found that the black piranha (Serrasalmus rhombeus) exhibits low genetic diversity, pronounced inbreeding, and significant population structure, likely shaped by historical events rather than contemporary factors.
Thomas A, Sylvain FÉ, Normandeau E, Leroux N, Holland A, Val AL, Derome N.   +6 more
europepmc   +2 more sources

Nematofauna of red piranha Pygocentrus nattereri (Kner, 1958) (Characiformes: Serrasalmidae) from Amazonia, Brazil [PDF]

Revista Brasileira de Parasitologia Veterinária, 2019
Abstract Between March and October 2008, 355 specimens of Pygocentrus nattereri were collected from the lowland lakes of Central Amazonia, Brazil, to study their nematode fauna. A total of 1.116 specimens of Nematoda were collected, belonging to six species.
Aprígio Mota Morais, Melissa Querido Cárdenas, José Celso de Oliveira Malta   +2 more
openaire   +6 more sources

Comparación del Desarrollo Embrionario de Piaractus brachypomus (Serrasalmidae) y Pseudoplatystoma sp. (Pimelodidae) [PDF]

International Journal of Morphology, 2010
Pseudoplatystoma sp y Piaractus brachypomus son dos especies de peces dulceacuicolas endemicas de America del Sur de alto interes comercial como peces de cultivo. El objetivo de este trabajo fue comparar el desarrollo embrionario hasta la eclosion en estas dos especies.
Díaz Olarte, John, Marciales-Caro, Lili J, Cristancho Vásquez, Freddy, Cruz-Casallas, Pablo E   +3 more
openaire   +2 more sources

Genetic comparison of populations of Piaractus brachypomus and P. orinoquensis (Characiformes: Serrasalmidae) of the Amazon and Orinoco basins

Neotropical Ichthyology, 2022
Recently, the large migratory fishes of the family Serrasalmidae (Piaractus brachypomus and P. orinoquensis) were described as restricted to the Orinoco and Amazon basins. Both species provide important ecosystem services.
María Doris Escobar L., Izeni P. Farias, Tomas Hrbek   +2 more
doaj   +1 more source

Molecular identification of cryptic diversity in species of cis-Andean Mylossoma (Characiformes: Serrasalmidae) [PDF]

Mitochondrial DNA Part A, 2016
Mylossoma is a Serrasalmidae genus with only two current valid species in the cis-Andean region but with several available names, today considered as junior synonymous. Morphological information combined with single-locus DNA sequences of cytochrome c oxidase I gene analysed by Barcode Index Number and General Mixed Yule Coalescent model were used in ...
Mateussi, Nadayca T. B., Pavanelli, Carla Simone, Oliveira, Claudio   +2 more
openaire   +4 more sources

Genetic Characterization of the Fish Piaractus brachypomus by Microsatellites Derived from Transcriptome Sequencing

Frontiers in Genetics, 2018
The pirapitinga, Piaractus brachypomus (Characiformes, Serrasalmidae), is a fish from the Amazon basin and is considered to be one of the main native species used in aquaculture production in South America.
Paulo H. Jorge, Vito A. Mastrochirico-Filho, Milene E. Hata, Natália J. Mendes, Raquel B. Ariede, Milena Vieira de Freitas, Manuel Vera, Fábio Porto-Foresti, Diogo T. Hashimoto   +8 more
doaj   +1 more source

OS ARGULÍDEOS (CRUSTACEA: BRANCHIURA) DA AMAZÔNIA BRASILEIRA 4 ASPECTOS DA ECOLOGIA DE ARGULUS MULTICOLOR STEKHOVEN, 1937 E ARGULUS PESTIFER RINGUELET, 1948. [PDF]

Acta Amazonica, 1983
Resumo A especificidade parasitária, áreas de fixação, hospedeiros naturais, índices de infestação e variação sazonai de Argulus multicolor e Argulus pestifer foram estudados durante o período de março de 1979 a março de 1980, no Janauacá, um lago de ...
José Celso de Oliveira Malta
doaj   +1 more source