8 documents found, page 1 of 1
Conteúdo estomacal de Galeocerdo cuvieri e Carcharhinus plumbeus (Elasmobranchi...
Shibuya, Akemi; Rosa, Ricardo de Souza; Gadig, Otto Bismarck FazzanoStomach contents of the sharks Galeocerdo cuvieri and Carcharhinus plumbeus, from Cabedelo county, Paraíba State, Brasil, were analyzed. A total of nine food items were found. The items belonged to six prey groups, including cephalopods, elasmobranchs, and teleosts, all considered common in Northeast Brazil. The stomach contents of G. cuvieri had a stingray of the genus Dasyatis, a skull of Ariidae, three denti...
Delayed healthcare and secondary infections following freshwater stingray injur...
Sachett, Jacqueline Almeida Gonçalves; S. Sampaio, Vanderson; Silva, Iran Mendonça; Shibuya, Akemi; Vale, Fábio Francesconi; Costa, Fabiano PeixotoIntroduction: This study aimed to describe the profile of freshwater stingray injuries in the State of Amazonas, Brazilian Amazon, and to identify the associated risk factors for secondary infections. Methods: This cross-sectional study used surveillance data from 2007 to 2014 to identify factors associated with secondary infections from stingray injuries. Results: A total of 476 freshwater stingray injuries we...
Morphology of lateral line canals in Neotropical freshwater stingrays (Chondric...
Shibuya, Akemi; Zuanon, Jansen; Araújo, Maria Lúcia Góes de; Tanaka, ShoThe relationship between the distribution of the lateral line canals and their functionality has not been well examined in elasmobranchs, especially among Neotropical freshwater stingrays of the family Potamotrygonidae. The spatial distribution of the canals and their tubules and the quantification of the neuromasts were analyzed in preserved specimens of Potamotrygon motoro, P. orbignyi, Potamotrygon sp. "curu...
Feeding behavior of the Neotropical freshwater stingray potamotrygon motoro (El...
Shibuya, Akemi; Zuanon, Jansen; Tanaka, ShoThe feeding mechanisms of elasmobranchs and their functioning have been receiving growing scientific attention, although less emphasis has yet to be directed towards batoid species. The present study investigated the use of orobranchial musculature during prey capture and processing behavior in Potamotrygon motoro. Ten orobranchial muscle groups were removed to determine their relative biomasses. The kinematics...
Catfishes as prey items of Potamotrygonid stingrays in the Solimões and Negro r...
Shibuya, Akemi; Zuanon, JansenIn spite of the fact that catfish have rarely been reported as food items in the diets of freshwater stingrays, they are commonly observed in the stomach contents of species inhabiting the Solimões and Negro rivers in the Brazilian Amazon. The stomach contents of six rays from the Solimões River and 64 from the Negro River were analyzed, and catfishes (distributed among the families Callichthyidae, Cetopsidae, ...
The use of pelvic fins for benthic locomotion during foraging behavior in Potam...
Shibuya, Akemi; Carvalho, Marcelo Rodrigues de; Zuanon, Jansen; Tanaka, ShoSynchronized bipedal movements of the pelvic fins provide propulsion (punting) during displacement on the substrate in batoids with benthic locomotion. In skates (Rajidae) this mechanism is mainly generated by the crural cartilages. Although lacking these anatomical structures, some stingray species show modifications of their pelvic fins to aid in benthic locomotion. This study describes the use of the pelvic ...
Diet composition of Dasyatis marianae (Elasmobranchii: Dasyatidae) of Paraíba S...
Shibuya, Akemi; Rosa, Ricardo de SouzaSHIBUYA, A.; ROSA, R. de S. Diet composition of Dasyatis marianae (Elasmobranchii: Dasyatidae) of Paraíba State, Brazil. Arquivos de Ciências do Mar, Fortaleza , v. 44, n.2, p.89-92, 2011.; Dasyatis marianae is a costal stingray that lives associated with coral and sandstone reefs. This species has beencaptured in the artisanal fishery along Paraíba State’s coast, Brazil. Its diet was studied through stomach co...
Diet composition of Dasyatis marianae (Elasmobranchii: Dasyatidae) off Paraíba ...
Shibuya, Akemi; Rosa, Ricardo de SouzaSHIBUYA, A.; ROSA, R de S. Diet composition of Dasyatis marianae (Elasmobranchii: Dasyatidae) off Paraíba State, Brazil. Arquivos de Ciências do Mar. Fortaleza, v. 44, n. 2, p. 89-92, 2011.; Dasyatis marianae is a costal stingray that lives associated with coral and sandstone reefs. This species has been captured in the artisanal fishery along Paraíba State’s coast, Brazil. Its diet was studied through stomach ...