Results 71 to 80 of about 374 (150)

Mapping of the venomous stingrays of the Potamotrygon genus in the Tietê River, São Paulo Sstate, Brazil. [PDF]

Rev Soc Bras Med Trop, 2022
Moreira ISR, Haddad Junior V.
europepmc   +1 more source

Ectoparásitos (Argulidae, Cymothoidae, Corallanidae) en rayas de agua dulce (Potamotrygonidae) de la Orinoquia colombiana

Biota Colombiana, 2018
Se registra por primera vez para Colombia (cuenca del Orinoco), cuatro especies de crustáceos ectoparásitos en rayas de agua dulce (Potamotrygonidae), género Potamotrygon.
Carlos Andrés Lasso, Martha R. Campos, Mónica A. Morales-Betancourt, David Castro   +3 more
doaj  

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

Karyotype description and evidence of multiple sex chromosome system X1X1X2X2/X1X2Y in Potamotrygon aff. motoro and P. falkneri (Chondrichthyes: Potamotrygonidae) in the upper Paraná River basin, Brazil

Neotropical Ichthyology
Cytogenetic analysis of Potamotrygon aff. motoro and P. falkneri indicated the occurrence of an X1X1X2X2/X1X2 Y multiple sex chromosome system in both species, with 2n = 66 chromosomes for females and 2n = 65 chromosomes for males.
Vanessa Paes da Cruz, Cristiane Kioko Shimabukuro-Dias, Claudio Oliveira, Fausto Foresti   +3 more
doaj   +1 more source

Effective Pre-Clinical Treatment of Fish Envenoming with Polyclonal Antiserum. [PDF]

Int J Mol Sci, 2023
Lopes Ferreira M, Falcão MAP, Bruni FM, Haddad V, Marques EE, Seibert CS, Lima C.   +6 more
europepmc   +1 more source

Ecology of endoparasites of the fluvial stingray Potamotrygon falkneri (Chondrichthyes: Potamotrygonidae) from the upper Paraná River floodplain, Brazil

Brazilian Journal of Biology
The present study investigated the ecological relationships between endoparasites and the host Potamotrygon falkneri from the upper Paraná River by using as indicators the host's relative condition factor (Kn), sex and hepatosomatic relation (HSR). Forty-
ACF. Lacerda, RM. Takemoto, GC. Pavanelli   +2 more
doaj   +1 more source

Feeding behavior of the Neotropical freshwater stingray Potamotrygon motoro (Elasmobranchii: Potamotrygonidae)

Neotropical Ichthyology
The feeding mechanisms of elasmobranchs and their functioning have been receiving growing scientific attention, although less emphasis has yet to be directed towards batoid species.
Akemi Shibuya, Jansen Zuanon, Sho Tanaka
doaj   +1 more source

Stingray Venom Proteins: Mechanisms of Action Revealed Using a Novel Network Pharmacology Approach. [PDF]

Mar Drugs, 2021
Kirchhoff KN, Billion A, Voolstra CR, Kremb S, Wilke T, Vilcinskas A.   +5 more
europepmc   +1 more source

Ichthyological ethnoknowledge of the "piabeiros" from the Amazon region, Brazil. [PDF]

J Ethnobiol Ethnomed, 2021
da Silva Ladislau D, Ribeiro MWS, da Silva Castro PD, Pantoja-Lima J, Aride PHR, de Oliveira AT.   +5 more
europepmc   +1 more source

Rhythmic chew cycles with distinct fast and slow phases are ancestral to gnathostomes. [PDF]

Philos Trans R Soc Lond B Biol Sci, 2023
Richard BA, Spence M, Rull-Garza M, Roba YT, Schwarz D, Ramsay JB, Laurence-Chasen JD, Ross CF, Konow N.   +8 more
europepmc   +1 more source