Results 21 to 30 of about 691 (98)

Stirring, charging, and picking: hunting tactics of potamotrygonid rays in the upper Paraná River

Neotropical Ichthyology
Hunting tactics of potamotrygonid freshwater rays remain unreported under natural conditions. Three main foraging tactics of Potamotrygon falkneri and P. motoro are described here based on underwater observations in the upper Paraná River.
Domingos Garrone-Neto, Ivan Sazima
doaj   +1 more source

Activity and habitat use of two species of stingrays (Myliobatiformes: Potamotrygonidae) in the upper Paraná River basin, Southeastern Brazil

Neotropical Ichthyology
The life history of freshwater stingrays (Potamotrygonidae) under natural conditions has been poorly documented. In this study, we investigated theperiod of activity and the habitat use of two species of the genus Potamotrygon in the upper Paraná River ...
Domingos Garrone Neto, Virgínia Sanches Uieda   +1 more
doaj   +1 more source

First identification of interspecies hybridization in the freshwater stingrays Potamotrygon motoro and P-falkneri (Myliobatiformes, Potamotrygonidae)

, 2015
The stingrays Potamotrygon motoro and P. falkneri occurred in sympatry in the Paraguay, Lower and Middle Parana River, and belong to distinct ecomorphological groups.
Cruz, V. P. [UNESP], Mendonça, F. F. [UNESP], Foresti, F., Pardo, B. G., Martinez, P., Oliveira, C. [UNESP], Oliveira, C., Vera, M., Foresti, F. [UNESP], Cruz, V. P., Mendonça, F. F.   +10 more
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The more stirring the better: cichlid fishes associate with foraging potamotrygonid rays

Neotropical Ichthyology
One hunting tactic of freshwater rays (Potamotrygonidae), termed "undulate the disc and stir substrate", is here reported to attract cichlids at two sites in the upper Paraná River.
Domingos Garrone-Neto, Ivan Sazima
doaj   +1 more source

Fig. 6 in Karyotype description and evidence of multiple sex chromosome system X X X X /X X Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil

, 2011
Fig. 6. Somatic metaphases of Potamotrygon aff. motoro, the population of Porto Rico (a), population of Ilha Solteira (b), identification of constitutive heterochromatin. Metaphases of Potamotrygon falkneri sample from Porto Rico (c) and Ilha Solteira (d)
Oliveira, Claudio, Shimabukuro-Dias, Cristiane Kioko, Cruz, Vanessa Paes da, Foresti, Fausto   +3 more
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A New Species of Tetraphyllidean (Cestoda) from the Largespot River Stingray, Potamotrygon falkneri (Potamotrygonidae: Chondrichthyes), from the Paraná Basin [PDF]

, 2009
Rhinebothrium paranaensis n. sp. (Tetraphyllidea: Cestoda) is described from the freshwater stingray Potamotrygon falkneri collected in the Colastine´ River, a tributary to the Lower Parana´ River in Argentina.
Menoret, Adriana, Ivanov, Veronica Adriana   +1 more
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Palpifer falkneri Viette 1968

, 2022
1. Palpifer falkneri Viette, 1968: 132 Type locality: Nepal, Dudh kosi Tal. Distribution: Indian records: Not confirmed. Global records: Nepal (Grehan & Mielke 2019). Note: According to Grehan & Mielke (2019), P.
Singh, Navneet, Das, Apurva
core   +1 more source

Morfometria de raias continentais (Chondrichthyes, Potamotrygonidae) do alto rio Paraná, Brasil = Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae)

Acta Scientiarum: Biological Sciences, 2007
Potamotrygonidae constitui o único grupo recente de Chondrichthyes cujo habitat está restrito, exclusivamente, a águas continentais. Na planície de inundação do Alto rio Paraná, espécies desta família estabeleceram-se após o fechamento das comportas da ...
Antonio Guilherme Cândido da Silva, Erivelto Goulart   +1 more
doaj  

Avaliação da citotoxicidade do extrato do ferrão de arraia Potamotrygon falkneri (Myliobatiformes:Potamotrygonidae) [PDF]

, 2015
Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia Animal, 2015.Em diversas regiões brasileiras os acidentes provocados por arraias dulcícolas são temidos por serem causa comum de ...
Oliveira, Lilibete Pereira de
core   +1 more source

Comparative study on extracts from the tissue covering the stingers of freshwater (Potamotrygon falkneri) and marine (Dasyatis guttata) stingrays

, 2007
Stingrays are elasmobranchs found along the seacoast and in some rivers of Brazil. Pain is the most conspicuous symptom observed in patients wounded by the bilaterally retroserrate stingers located in the tail, which are covered by glandular and ...
Junior, Vidal Haddad, Lira, Marcela S., Malta, Marilia B., Katia C. Barbaro, Barbaro, Katia C., João L.C. Cardoso, Vidal Haddad Junior, Santoro, Marcelo L., Sabrina L. Soares, Neto, Dorningos Garrone, Marcela S. Lira, Domingos Garrone Neto, Cardoso, Joao L. C., Marcelo L. Santoro, Marília B. Malta, Soares, Sabrina L.   +15 more
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