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MARINE MAMMAL SCIENCE, 13(2):307-3 14 (April 1997) 0 1997 by the Society for Marine Mammalogy
 

Summary: MARINE MAMMAL SCIENCE, 13(2):307-3 14 (April 1997)
0 1997 by the Society for Marine Mammalogy
RESIGHTINGS AND BEHAVIOR OF FALSE KILLER WHALES
(PSEUDORCA CRASSZDENS) IN COSTA RICA
False killer whales are the least known large-sized globicephalines. They have
been sighted mostly in pelagic areas (e.g., Wade and Gerrodette 1993), with
few reports from nearshore waters (e.g., Stacey and Baird 1991). False killer
whales are known to be gregarious, and it has been suggested that they form
strong social bonds in the wild (Stacey and Baird 1991). However, photoiden-
tification of false killer whales has not been attempted due to the difficulties
of studying an infrequently sighted species at sea. In addition, although stud-
ies on behavior in captivity have been conducted (e.g., Brown et al. 1966), be-
havioral observations of free-ranging killer whales have been necessarily brief
(Pilleri 1967, Perryman and Foster 1980, Connor and Norris 1982, Au and
Pitman 1988, Pitman and Ballance 1992, Palacios and Mate 1996). This note
reports resightings and behavioral observations of false killer whales made dur-
ing studies on dolphin ecology at Golfo Dulce and Isla de1 Coca, Costa Rica,
and from a cetacean survey in the Pacific Ocean off Costa Rica.
Golfo Dulce (GD, center at 08 83 is an estuarine embayment
on the southern Pacific coast of Costa Rica. The gulf is about 50 km long and

  

Source: Acevedo, Alejandro - Department of Biology, Western Washington University

 

Collections: Environmental Sciences and Ecology