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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae)

Texto completo
Autor(es):
Shibuya, Akemi [1, 2] ; de Carvalho, Marcelo R. [2] ; Zuanon, Jansen [1] ; Tanaka, Sho [3]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Inst Nacl de Pesquisas da Amazonia, Coordenacao Biodiversidade, BR-69060001 Manaus, Amazonas - Brazil
[2] Univ Sao Paulo, Inst Biociencias, Dept Zool, BR-05508090 Sao Paulo, SP - Brazil
[3] Tokai Univ, Sch Marine Sci & Technol, Shimizu, Shizuoka 4248610 - Japan
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Zoologia; v. 32, n. 3, p. 179-186, MAY-JUN 2015.
Citações Web of Science: 1
Resumo

Synchronized 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 fins for locomotory performance and body reorientation in the freshwater stingray Potamotrygon motoro (Muller \& Henle, 1841) during foraging. Pelvic fin movements of juvenile individuals of P. motoro were recorded in ventral view by a high-speed camera at 250-500 fields/s(-1). Potamotrygon motoro presented synchronous, alternating and unilateral movements of the pelvic fins, similar to those reported in skates. Synchronous movements were employed during straightforward motion for pushing the body off the substrate as well as for strike feeding, whereas unilateral movements were used to maneuver the body to the right or left during both locomotion and prey capture. Alternating movements of the pelvic fins are similar to bipedal movements in terrestrial and semi-aquatic tetrapods. The pelvic fins showed coordinated movements during feeding even when stationary, indicating that they have an important function in maintaining body posture (station holding) during prey capture and manipulation. The use of pelvic fins during prey stalking may be advantageous because it results in less substrate disturbance when compared to movements generated by pectoral fin undulation. The range of pelvic fin movements indicates more complex control and coordination of the pelvic radial muscles. (AU)

Processo FAPESP: 12/09877-0 - Estudo comparativo da morfologia do aparelho alimentar em raias da ordem Myliobatiformes (Chondrichthyes: Batoidea)
Beneficiário:Marcelo Rodrigues de Carvalho
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 12/05391-5 - Evolução molecular de regiões regulatórias de genes HOX associados com a morfologia da nadadeira de peixes, com especial ênfase em Chondrichthyes
Beneficiário:Marcelo Rodrigues de Carvalho
Linha de fomento: Auxílio à Pesquisa - Regular