Results 91 to 100 of about 243 (120)
Metazoan endoparasites of Pygocentrus nattereri (Characiformes: Serrasalminae) in the Negro River, Pantanal, Brazil [PDF]
Brazilian Journal of Veterinary Parasitology, 2013 In the period of October 2007 to August 2008, 152 specimens ofPygocentrus nattereri were caught in the Negro River in the Nhecolândia region, central Pantanal wetland, State of Mato Grosso do Sul, Brazil. The specimens were necropsied and a total of 4,212 metazoan endoparasites were recovered, belonging to 10 taxons:Procamallanus (Spirocamallanus ...
Luiz Eduardo Roland Tavares +2 more
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Nutrient Content of Piranha (Characidae, Serrasalminae) Prey Items
Copeia, 1994Leo G Nico
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Cytogenetic characterization of Metynnis maculatus (Teleostei; Characiformes): the description in Serrasalminae of a small B chromosome bearing inactive NOR-like sequences. [PDF]
Caryologia, 2009 Mitotic chromosomes of Metynnis maculatus (KNER 1860) (Teleostei, Characiformes), a fish species that occurs in the Amazon and Parana-Paraguay river basins, were analyzed for the first time by Giemsa and Ag-NOR staining, C-banding and fluorescence in ...
ALMEIDA-TOLEDO, Lurdes F. de +2 more
exaly +3 more sources
Morphology of the retina in the freshwater fish Metynnis roosevelti Eigenmann (Characidae, Serrasalminae) and the effects of monochromatic red light [PDF]
Revista Brasileira De Zoologia, 1999 The retina of Metynnis roosevelti Eigenmann, 1915, a very active freshwater fish, was investigated by light and electron microscopy and was found to have a complex neuronal structure that allows rapid responses of visual stimuli. Retina photoreceptors are double cones, single long cones, single short cones and rods.
Lucélia Donatti, Edith Fanta
exaly +4 more sources
Schallerzeugung bei Piranhas (Serrasalminae, Characidae)
Zeitschrift f�r Vergleichende Physiologie, 19711. Piranhas (Serrasalmus nattereri Kner, S. rhombeus Linne, S. hollandi Eigenmann, S. striolatus Steindachner, S. elongatus Kner) erzeugen durch einen Schwimmblasenmechanismus mit paarigen externen Trommelmuskeln Schallsignale, wenn man sie festhalt. 2.
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Fine structure of the drum muscles of the piranha (serrasalminae, characidae)
Cell and Tissue Research, 1977The anterior and the posterior drum muscles of the piranha resemble each other in all essential fine structural aspects: myofibrils are slender; sarcomeres are short compared with those of other drum muscles; mitochondria, located in the periphery of the fibers, are numerous and show an irregular internal structure; and the sarcoplasmic reticulum is ...
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Aquaculture, 2004
Abstract Nitrite (NO 2 − ) is toxic to fish. High levels of NO 2 − may develop in natural aquatic environments or in aquaculture systems, a situation that is aggravated in tropical regions by high temperatures and low dissolved oxygen. The toxicity of NO 2 − was evaluated in the Amazonian fish, Colossoma macropomum to define the environmental ...
Oscar Tadeu Ferreira da Costa +3 more
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Abstract Nitrite (NO 2 − ) is toxic to fish. High levels of NO 2 − may develop in natural aquatic environments or in aquaculture systems, a situation that is aggravated in tropical regions by high temperatures and low dissolved oxygen. The toxicity of NO 2 − was evaluated in the Amazonian fish, Colossoma macropomum to define the environmental ...
Oscar Tadeu Ferreira da Costa +3 more
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Local degenerative changes in the drum muscles of piranhas (Serrasalminae, Characidae)
Cell and Tissue Research, 1978In the posterior drum muscle of the piranha structural alterations are frequently observed. Electron microscopic studies revealed a disordering of the myofibrils in these regions, accompanied by conspicuous changes in the mitochondria. As the degree of disorder increases, the mitochondrial cristae initially swell to form vesicles.
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Revue Suisse De Zoologie, 2003 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Jégu, M. +2 more
exaly +5 more sources
Copeia, 2001
Cytogenetic data obtained for Serrasalmus rhombeus revealed two cytotypes (cyto- type 1 and cytotype 2) at four sampling sites. Cytotype 1 consists of 2n 5 60, 20M 1 24SM 1 6ST 1 10A and was detected in specimens from Negro River (Anavil- hanas Islands), Solimoes River (Camaleao Lake), confluence of Negro and Solimoes Rivers (Catalao Lake), and ...
Nakayama, Celeste Mutuko +3 more
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Cytogenetic data obtained for Serrasalmus rhombeus revealed two cytotypes (cyto- type 1 and cytotype 2) at four sampling sites. Cytotype 1 consists of 2n 5 60, 20M 1 24SM 1 6ST 1 10A and was detected in specimens from Negro River (Anavil- hanas Islands), Solimoes River (Camaleao Lake), confluence of Negro and Solimoes Rivers (Catalao Lake), and ...
Nakayama, Celeste Mutuko +3 more
openaire +1 more source