Results 31 to 40 of about 2,707 (214)

Determination and evaluation of mercury concentration in fish in the São Francisco River Watershed, Brazil

Revista Ambiente & Água, 2021
The objective of this work was to evaluate the bioaccumulation of mercury in 13 species of fish with different eating habits, captured in the Três Marias Reservoir, São Francisco Basin, from March 2012 to April 2013.
Marcos Vinícius Teles Gomes, Carlos Alexandre Borges Garcia, Yoshimi Sato, Érica Araújo Mendes, Mário Olindo Tallarico de Miranda, Silvânio Silvério Lopes da Costa   +5 more
doaj   +1 more source

Molecular characterization and genetic relationships of seven piranha species of the genera Serrasalmus and Pygocentrus (Characiformes: Serrasalmidae) from Paraná-Paraguay, São Francisco and Tocantins River basins in Brazil [PDF]

Brazilian Journal of Biology, 2019
Genetic and phylogenetic relationships among seven piranha species of the genera Serrasalmus and Pygocentrus from the Paraná-Paraguay, São Francisco and Tocantins River basins were evaluated in the present study by partial sequences of two mitochondrial ...
T. S. Bignotto, V. N. Gomes, T. C. Maniglia, T. A. Boni, C. S. Agostinho, S. M. A. P. Prioli, A. J. Prioli   +6 more
doaj   +2 more sources

Ontogenetic diet shifts: an additional mechanism for successful invasion of a piranha species in a Neotropical floodplain

Anais da Academia Brasileira de Ciências, 2021
Ontogenetic shifts in food preference reduces intraspecific competition as immature individuals eat different food types than adults. This diet plasticity could facilitate species’ ability to successfully invade and establish itself in a new environment,
GUSTAVO H. ZAIA ALVES, BRUNO R.S. FIGUEIREDO, GISLAINE I. MANETTA, EVANILDE BENEDITO   +3 more
doaj   +1 more source

Serrasalmus Lacepede 1803

, 2018
Published as part of Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da & Pavanelli, Carla Simone, 2018, Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated, pp. 1-111 in Neotropical Ichthyology 16 (2) on page 53, DOI: 10.1590/1982-0224-20170094, http://zenodo.org/record ...
Ota, Renata Rúbia, Deprá, Gabriel de Carvalho, Graça, Weferson Júnio da, Pavanelli, Carla Simone   +3 more
openaire   +1 more source

Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus

Neotropical Ichthyology
Spermatozoa and spermiogenesis ultrastructure were studied in the serrasalmine species Piaractus mesopotamicus, Mylossoma duriventre, Serrasalmus maculatus, and Metynnis mola and two distinct patterns may be recognized: the first common to Mylossoma ...
Priscila Gusmão-Pompiani, Luiz R. Malabarba, Claudio Oliveira, Irani Quagio-Grassiotto   +3 more
doaj   +1 more source

Karyotype differentiation and cytotaxonomic considerations in species of Serrasalmidae (Characiformes) from the Amazon basin

Neotropical Ichthyology
Six species of Serrasalmidae from the central Amazon, representatives of the genera Serrasalmus (S. elongatus, S. maculatus, S. cf. rhombeus, and S. rhombeus), Pygocentrus (P. nattereri), and Colossoma (C.
Celeste Mutuko Nakayama, Eliana Feldberg, Luiz Antonio Carlos Bertollo   +2 more
doaj   +1 more source

Novas ocorrências de metacercária de Austrodiplostomum compactum (Lutz, 1928) (Platyhelminthes: Digenea) parasito de olhos de peixes da Bacia do Rio Paraná New occurrences of metacercariae of Austrodiplostomum compactum (Lutz, 1928) (Platyhelminthes: Digenea) eye flukes of fish from the Paraná Basin

Revista Brasileira de Parasitologia Veterinária, 2008
Austrodiplostomum compactum (Platyhelminthes: Digenea) parasita os olhos de várias de espécies de peixes. A presença deste parasito, em casos extremos, pode causar exoftalmia, deslocamento da retina, opacidade do cristalino e cegueira ou até a morte.
Fábio Hideki Yamada, Luis Henrique de A. Moreira, Tiago L. Ceschini, Ricardo Massato Takemoto, Gilberto Cezar Pavanelli   +4 more
doaj   +1 more source

Condition factor variations over time and trophic position among four species of Characidae from Amazonian floodplain lakes: effects of an anomalous drought

Brazilian Journal of Biology, 2017
The effects of extreme droughts on freshwater fish remain unknown worldwide. In this paper, we estimated the condition factor, a measure of relative fitness based on the relationship of body weight to length, in four fish species representing two trophic
I. A. Tribuzy-Neto, K. G. Conceição, F. K. Siqueira-Souza, L. E. Hurd, C. E. C. Freitas   +4 more
doaj   +1 more source

Evolutionary history and identification of conservation units in the giant otter, Pteronura brasiliensis. [PDF]

, 2011
The giant otter, Pteronura brasiliensis, occupies a range including the major drainage basins of South America, yet the degree of structure that exists within and among populations inhabiting these drainages is unknown.
Ariani, C., Ariani, C., Bodmer, R., Bodmer, R., Gotelli, D., Gotelli, D., Groombridge, J., Groombridge, J., Iyengar, A., Iyengar, A., Jordan, W., Jordan, W., Kundu, S., Kundu, S., Pickles, R., Pickles, R., Rojas, V., Rojas, V., Van Damme, P., Van Damme, P.   +19 more
core   +1 more source

Serrasalmus marginatus Valenciennes 1837

, 2014
S. marginatus Valenciennes, 1837 first record Sverlij et al. (1998)
Litz, Thomas O., The, Stefan Koerber Introduction   +1 more
openaire   +2 more sources