Marine Mammal Commission, 1825 Connecticut Avenue, N.W., Room 512, Washington, DC 20009.
CETACEANS OF THE NORTHERN GULF OF CALIFORNIA: DISTRIBUTION, OCCURRENCE, and RELATIVE ABUNDANCE
Version of Record online: 26 AUG 2006
Marine Mammal Science
Volume 10, Issue 3, pages 283–298, July 1994
How to Cite
Silber, G. K., Newcomer, M. W., Silber, P. C., Pérez-Cortés M., H. and Ellis, G. M. (1994), CETACEANS OF THE NORTHERN GULF OF CALIFORNIA: DISTRIBUTION, OCCURRENCE, and RELATIVE ABUNDANCE. Marine Mammal Science, 10: 283–298. doi: 10.1111/j.1748-7692.1994.tb00483.x
- Issue online: 26 AUG 2006
- Version of Record online: 26 AUG 2006
- Received: 26 February 1993 Accepted: 11 March 1994
- Gulf of California;
- relative abundance;
- group size
A total of 1,715 km of boat-based surveys and 1,521 km of aircraft-based surveys was conducted from 1986–1989 to assess the distribution, relative abundance, and ecological relationships of cetaceans in the northern Gulf of California. Seven cetacean species were seen; in decreasing frequency of groups encountered they were: bottlenose dolphins, Tursiops truncatus; vaquitas, Phocoena sinus; common dolphins, Delphinus delphis; fin whales, Balaenoptera physalus; Bryde's whales, B. edeni; gray whales, Eschrichtius robustus, and killer whales, Orcinus orca. Common dolphins were numerically dominant and bottlenose dolphins were seen most often. Bryde's whales and vaquitas had the smallest group sizes. In general, the odontocete cetaceans were separated spatially, whereas the distribution of Bryde's and fin whales overlapped considerably.