[MARMAM] New publications on common bottlenose dolphins in Brazilian waters

Lucas Milmann lcmilmann at gmail.com
Wed Dec 28 05:06:00 PST 2016

Dear MARMAM subscribers,

We are pleased to announce two new publications on common bottlenose
dolphins in Brazilian waters:

1)      Milmann, L., Danilewicz, D., Machado, R., Santos, R.A. and Ott,
P.H. (2016) Feeding ecology of the common bottlenose dolphin, *Tursiops
truncatus*, in southern Brazil: analyzing its prey and the potential
overlap with fisheries. *Brazilian Journal of Oceanography*, 64(4):
415-422. doi: 10.1590/s1679-87592016116406404

This article is full open access and available for download at the
following link: https://dx.doi.org/10.1590/s1679-87592016116406404

2)     Milmann, L.C., Danilewicz, D., Baumgarten, J. and Ott, P.H. (2016)
Temporal-spatial distribution of an island-based offshore population of
common bottlenose dolphins (*Tursiops truncatus*) in the equatorial
Atlantic. Marine Mammal Science. doi:10.1111/mms.12380


A little-studied common bottlenose dolphin (*Tursiops truncatus*)
population inhabits the offshore waters surrounding Saint Paul's Rocks, a
Brazilian marine protected area in the equatorial Atlantic Ocean. Five
field expeditions (May 2011–May 2013) were conducted to characterize the
habitat use, population size, and site fidelity of this population. Three
different survey methods were employed: line-transect surveys, land-based
surveys, and photo-identification surveys. A population size of 23
individuals (19–28, CI 95%), which were present on most sampling days (>90%
of surveys), was estimated. The maximum resighting interval of
photo-identified animals was 9 yr and 3 mo for five distinct individuals,
based on data from nonsystematic efforts that have been ongoing since 2004.
The dolphins exhibited strong site fidelity, as the minimum convex polygon
(MCP, 95%) method revealed that they restricted their movements to a
0.5 km2 area
across seasons and a 0.99 km2 area across years (95% kernel). The dolphins
preferred shallow waters close to the archipelago (<1.2 km from the
islands), especially on the eastern and southeastern sides, where
oceanographic models have revealed persistent upwelling that may result
from underwater currents and where food may be more predictably available.

This article can be found at: http://onlinelibrary.wiley.

Please don’t hesitate to contact me directly for any queries (
lcmilmann at gmail.com)

Best wishes,
Lucas Milmann

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