Sawfishes stealth revealed using computational fluid dynamics.
J Fish Biol
; 90(4): 1584-1596, 2017 Apr.
Article
en En
| MEDLINE
| ID: mdl-28239851
ABSTRACT
Detailed computational fluid dynamics simulations for the rostrum of three species of sawfish (Pristidae) revealed that negligible turbulent flow is generated from all rostra during lateral swipe prey manipulation and swimming. These results suggest that sawfishes are effective stealth hunters that may not be detected by their teleost prey's lateral line sensory system during pursuits. Moreover, during lateral swipes, the rostra were found to induce little velocity into the surrounding fluid. Consistent with previous data of sawfish feeding behaviour, these data indicate that the rostrum is therefore unlikely to be used to stir up the bottom to uncover benthic prey. Whilst swimming with the rostrum inclined at a small angle to the horizontal, the coefficient of drag of the rostrum is relatively low and the coefficient of lift is zero.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Natación
/
Rajidae
/
Conducta Alimentaria
/
Hidrodinámica
Límite:
Animals
Idioma:
En
Revista:
J Fish Biol
Año:
2017
Tipo del documento:
Article
País de afiliación:
Australia