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Interaction between killer whales (Orcinus orca) and hammerhead sharks (Sphyrna sp.) in Galápagos waters
Author(s) -
L. Sonnino Sorisio,
Alessandro De Maddalena,
Ingrid N. Visser
Publication year - 2006
Publication title -
latin american journal of aquatic mammals
Language(s) - Spanish
Resource type - Journals
eISSN - 2236-1057
pISSN - 1676-7497
DOI - 10.5597/lajam00095
Subject(s) - whale , fishery , biology , cormorant , zoology , ecology , predation
A possible predatory interaction between killer whales (Orcinus orca) and hammerhead sharks (Sphyrna sp.) was observed during April 1991 near Punta Cormorant, Galapagos Islands. Three killer whales were observed in close proximity to a freshly dead female hammerhead. One of the killer whales (approximately 6m in length) was observed motionless in a vertical position above the shark carcass and later was seen chasing an approximately 40cm hammerhead, supposedly a pup born prematurely from the dead shark. The sharks are thought to have been scalloped hammerheads (S. lewini). RESUMEN: Una posible interaccion predatoria entre orcas (Orcinus orca) y peces martillo (Sphyrna sp.) fue observada en Abril de 1991 cerca de Punta Cormoran, Islas Galapagos. Tres orcas fueron vistas muy proximas a una hembra de pez martillo recien muerta. Una de las orcas (de unos 6m de longitud), fue observada inmovil en posicion vertical sobre la carcasa del tiburon y despues fue vista persiguiendo a un pez martillo de unos 40cm, supuestamente una cria nacida prematuramente de la hembra muerta. Se piensa que los tiburones pudieran ser cornudas negras (S. lewini).

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