> Dear Colleagues, > > This is to announce a new paper in the current issue of Marine and Freshwater > Research entitled "Ecology and comparison of coastal and offshore bottlenose > dolphins (Tursiops truncatus) in California² (M. Bearzi, C.A. Saylan and A. > Hwang) > > Abstract > Populations of coastal and offshore bottlenose dolphins (Tursiops truncatus) > are considered to differ ecologically, with implications for their protection > and management. We assessed occurrence, distribution and behaviour of coastal > and offshore populations of dolphins during a photo-identification study in > Santa Monica Bay and nearby areas (19972007). Bottlenose dolphins occurred > year-round and were encountered on 44.2% of all surveys (n = 425). We > photo-identified 647 individuals; of these, 375 (58.0%) were coastal (<1 km > from shore), 241 (37.2%) offshore (165 km from shore) and 31 were both > (4.8%). Dolphins mostly travel (69.0%) and travel-dive (61.5%), with offshore > dolphins socialising more (22.6%) than coastal. There were low re-sighting > rates for both coastal and offshore dolphins. Low re-sighting rates of coastal > individuals provide little evidence of year-round site fidelity, suggesting > their range is greater than the study area. Several individuals were > re-sighted between and over 1-year periods, often foraging. This suggests that > coastal dolphins: (1) are highly mobile within inshore waters, but spend time > foraging in the study area, and (2) range >1 km from shore, contrary to what > has been previously reported. > > > The article is available on the journal site: > http://www.publish.csiro.au/nid/126/paper/MF08279.htm > > > Regards, > > > Maddalena Bearzi > > ______________________________ > Maddalena Bearzi, Ph.D. > Ocean Conservation Society, President > P.O. Box 12860 > Marina del Rey, CA 90295 - USA > ph.310.8225205, fax 310.8225729 > [email protected] > http://www.oceanconservation.org > > > >
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