Results 151 to 160 of about 889 (175)
Some of the next articles are maybe not open access.
Conservation Genetics, 2014
The stingrays Potamotrygon motoro and P. falkneri occurred in sympatry in the Paraguay, Lower and Middle Parana River, and belong to distinct ecomorphological groups. The construction of a hydroelectric dam in Itaipu in 1982 facilitated the invasion of Upper Parana River by both species with unpredictable ecological consequences. The aim of the present
Vanessa Paes Cruz +2 more
exaly +3 more sources
The stingrays Potamotrygon motoro and P. falkneri occurred in sympatry in the Paraguay, Lower and Middle Parana River, and belong to distinct ecomorphological groups. The construction of a hydroelectric dam in Itaipu in 1982 facilitated the invasion of Upper Parana River by both species with unpredictable ecological consequences. The aim of the present
Vanessa Paes Cruz +2 more
exaly +3 more sources
Molecular Biology, 2015
5S rDNA genes of the stingray Potamotrygon motoro were PCR replicated, purified, cloned and sequenced. Two distinct classes of segments of different sizes were obtained. The smallest, with 342 bp units, was classified as class I, and the largest, with 1900 bp units, was designated as class II.
Vanessa Paes Cruz, Claudio Oliveira
exaly +4 more sources
5S rDNA genes of the stingray Potamotrygon motoro were PCR replicated, purified, cloned and sequenced. Two distinct classes of segments of different sizes were obtained. The smallest, with 342 bp units, was classified as class I, and the largest, with 1900 bp units, was designated as class II.
Vanessa Paes Cruz, Claudio Oliveira
exaly +4 more sources
Potamotrygon motoro stingray venom induces both neurogenic and inflammatory pain behavior in rodents
Toxicon, 2018Freshwater stingray accidents cause an immediate, intense, and unrelieved pain which is followed by edema, erythema and necrosis formation. Treatment for stingray envenomation is based on administration of analgesic, antipyretic and anti-inflammatory drugs.
L F, Kimura +3 more
openaire +2 more sources
Potamotrygon motoro (Müller & Henle 1841) Distribution tropical S. A., east of Andes. Notes Barriga (1994), Galacatos et al. (2004), Valdiviezo-Rivera et al. (2018), Jácome-Negrete et al. (2018).
Escobar-Camacho, Daniel +4 more
openaire +1 more source
Escobar-Camacho, Daniel +4 more
openaire +1 more source
Histopathological study in wild freshwater stingrays Potamotrygon motoro in the Peruvian Amazon
Comparative Clinical Pathology, 2017The genus Potamotrygon comprises stingrays endemic to South American rivers. Potamotrygon motoro is a popular Amazonian species in ornamental fish trade. Histopathological studies of these species allow knowing the health status of these specimens. The objective of the present study was to investigate the occurrence of histopathological alterations in ...
Ramos-Espinoza, F.C. +2 more
exaly +2 more sources
Environmental Biology of Fishes, 1983
Observations of reproductive features and body measurements were made on wild-caught, freshwater stingrays, Potamotrygon circularis and P. motoro, from the Amazon drainage of western Brazil and southern Colombia. Further observations were made in Detroit's Belle Isle Aquarium on a captive pair of P.
Thomas B. Thorson +2 more
openaire +1 more source
Observations of reproductive features and body measurements were made on wild-caught, freshwater stingrays, Potamotrygon circularis and P. motoro, from the Amazon drainage of western Brazil and southern Colombia. Further observations were made in Detroit's Belle Isle Aquarium on a captive pair of P.
Thomas B. Thorson +2 more
openaire +1 more source
Behavioural Processes, 2015
Freshwater stingrays (Potamotrygon motoro) have been shown to use a variety of spatial learning strategies including directional, landmark and place learning. In the present study, the significance of landmarks and geometric cues was investigated in a hole-board task.
V, Schluessel +2 more
openaire +2 more sources
Freshwater stingrays (Potamotrygon motoro) have been shown to use a variety of spatial learning strategies including directional, landmark and place learning. In the present study, the significance of landmarks and geometric cues was investigated in a hole-board task.
V, Schluessel +2 more
openaire +2 more sources
Comparative Biochemistry and Physiology Part B: Biochemistry and Molecular Biology, 2006
The interrenal gland (adrenocortical homolog) of elasmobranchs produces a unique steroid, 1alpha-hydroxycorticosterone (1alpha-B). The synthesis of this and most other steroids requires both cholesterol side chain cleavage (CYP11A) and 3beta-hydroxysteroid dehydrogenase (HSD3).
Scott Nunez, B. +4 more
openaire +2 more sources
The interrenal gland (adrenocortical homolog) of elasmobranchs produces a unique steroid, 1alpha-hydroxycorticosterone (1alpha-B). The synthesis of this and most other steroids requires both cholesterol side chain cleavage (CYP11A) and 3beta-hydroxysteroid dehydrogenase (HSD3).
Scott Nunez, B. +4 more
openaire +2 more sources
Genome
Cytogenetic studies on Potamotrygon motoro (Müller & Henle, 1841) are limited to classical cytogenetic techniques, but they do reveal great karyotypic variation. The main differences are related to the karyotypic formula and the absence/presence of sex chromosome systems.
Alex M.V. Ferreira +3 more
openaire +2 more sources
Cytogenetic studies on Potamotrygon motoro (Müller & Henle, 1841) are limited to classical cytogenetic techniques, but they do reveal great karyotypic variation. The main differences are related to the karyotypic formula and the absence/presence of sex chromosome systems.
Alex M.V. Ferreira +3 more
openaire +2 more sources
Aquaculture, 2018
Abstract An outbreak of a novel disease characterized by serious hemorrhage in the abdomen, ascites and bleaching of the liver was recorded in the freshwater cultured stingray Potamotrygon motoro, which is a cartilaginous fish related to sharks, in Panyu, Guangdong province of South China. The bacterial isolates from the lesions of diseased P. motoro
Hong-Yan Sun +7 more
openaire +1 more source
Abstract An outbreak of a novel disease characterized by serious hemorrhage in the abdomen, ascites and bleaching of the liver was recorded in the freshwater cultured stingray Potamotrygon motoro, which is a cartilaginous fish related to sharks, in Panyu, Guangdong province of South China. The bacterial isolates from the lesions of diseased P. motoro
Hong-Yan Sun +7 more
openaire +1 more source