2012
DOI: 10.1590/s1679-62252012000100018
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Abstract: 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. 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 of the musculature was described based on videos of prey capture and manipulation under captive cond… Show more

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Cited by 17 publications
(12 citation statements)
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References 23 publications
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“…não são dissolvidos pelos ácidos estomacais das raias. Shibuya et al (2012) afirmam que esse comportamento Os opérculos passam para o intestino e são eliminados de forragear revolvendo o substrato é possível devido à com o bolo fecal. A constatação visual desse presença de seu sistema sensorial provido de eletro e comportamento seria muito difícil para a área de mecanorreceptores para a localização dos itens estudo devido à alta turbidez da água, no entanto, enterrados.…”
Section: Dieta Totalunclassified
“…não são dissolvidos pelos ácidos estomacais das raias. Shibuya et al (2012) afirmam que esse comportamento Os opérculos passam para o intestino e são eliminados de forragear revolvendo o substrato é possível devido à com o bolo fecal. A constatação visual desse presença de seu sistema sensorial provido de eletro e comportamento seria muito difícil para a área de mecanorreceptores para a localização dos itens estudo devido à alta turbidez da água, no entanto, enterrados.…”
Section: Dieta Totalunclassified
“…The punt movement was observed only during feeding behavior, indicating that it is used mainly for striking the prey just before it is captured; the pelvic fins may not necessarily protract entirely to generate thrust. Unilateral and alternating movements of the pelvic fins provide a fine control of the body during prey capture behavior, positioning the body over the prey and directing the mouth to grasp it (SHIBUYA et al 2012). The guidance is generated by the paired fins and act together during foraging behavior, and the pelvic fins seem to be essential for oral prey manipulation, whereas the pectoral fins prevent it from escaping (by keeping the prey under the body of the ray).…”
Section: Discussionmentioning
confidence: 99%
“…GARRONE- NETO & SAZIMA (2009) observed that Potamotrygon motoro (Müller & Henle, 1841) and P. falkneri Castex & Maciel, 1963 in the field undulate their pectoral fins in the bottom to uncover buried prey. However they do not mention the movement of the pelvic fins, which may be employed during foraging to decrease disturbance of the benthos, thus allowing for prey detection by the lateral line canals (ROSENBERGER 2001, SHIBUYA et al 2010, 2012. Later, MACESIC et al (2013) observed that P. orbignyi (Castelnau, 1855) uses both pelvic and pectoral fins during punting movements.…”
mentioning
confidence: 99%
“…Potamotrygon motoro from the Negro River has a muscular orobranchial system adapted to breaking rigid structures of hard prey (Shibuya et al 2012), which may explain the crushed condition of doradid and loricariid preys found in the stomach contents of the analyzed specimens. The catfishes consumed by Paratrygon aiereba were found intact within their stomachs, which could indicate its ingestion by suction mechanisms.…”
Section: Itemsmentioning
confidence: 98%