[MARMAM] New paper on habitat partitioning by dolphins

Maddalena Bearzi mbearzi at earthlink.net
Tue Jan 17 12:40:47 PST 2006

Dear Colleagues,

the following paper has recently been published on the Southern California
Academy of Science Bulletin:

Bearzi, M. 2005. Habitat partitioning by three species of dolphins in Santa
Monica Bay, CA. Southern California Academy of Science Bulletin

Best Regards,

Maddalena Bearzi, Ph.D.
Ocean Conservation Society, President
P.O. Box 12860
Marina del Rey, CA 90295 - USA
ph.310.8225205, fax 310.8225729
mbearzi at earthlink.net

Habitat partitioning by bottlenose dolphins (Tursiops truncatus),
shortbeaked common dolphins (Delphinus delphis), and long-beaked common
dolphins (D. capensis), were assessed during 178 surveys conducted between
1997­2000 in Santa Monica Bay, California. Bottlenose dolphins were found
year-round within 0.5 km from shore in 80.0 % of the sightings (n 137) but
they were also found in deeper waters further offshore. The two common
dolphin species were observed year-round (n 83) far from shore and near
escarpments; they were sympatric but never seen in mixed schools. This study
suggests that habitat partitioning in the bay probably relates to resource
partitioning among three dolphins species with roughly similar ecological

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