[MARMAM] Publication on movement patterns in Antillean manatees

Nataly Castelblanco castelblanco.nataly at gmail.com
Fri Nov 2 21:57:01 PDT 2012

Dear Colleagues,

[Apologies for cross posting]

We are pleased to announce the publication of our paper:

*Castelblanco-Martínez, D. N., Padilla-Sáldivar, J., Hernández-Arana, H.
A., Slone, D., Reid, J. & Morales-Vela, B. (2012). Movement patterns of
Antillean manatees in Chetumal Bay (Mexico) and coastal Belize: A challenge
for regional conservation. Mar. Mamm.Sci.DOI: 10.1111/j.1748-7692.2012.00602.x

Information from 15 satellite-tracked Antillean manatees (*Trichechus
manatus manatus*) was analyzed in order to assess individual movements,
home ranges, and high-use areas for conservation decisions. Manatees were
captured in Chetumal Bay, Mexico, and tagged with Argos-monitored satellite
transmitters. Location of the manatees and physical characteristics were
assessed to describe habitat properties. Most manatees traveled to
freshwater sources. The Maximum Area Size (MAS) for each manatee was
determined using the observation-area method. Additional kernel densities
of 95% home range and 50% Center of Activity (COA) were also calculated,
with manatees having 1–3 COAs. Manatees exhibited two different movement
patterns: remaining in Chetumal Bay, and long-distance (up to 240 km in 89
d). The residence time in Chetumal Bay was higher for females (89.6% of
time) than for males (72.0%), but the daily travel rate (0.4–0.5 km/d) was
similar for both sexes. Most of the COAs fell within Natural Protected
Areas (NPA). However, manatees also travel for long distances into
unprotected areas, where they face uncontrolled boat traffic, fishing
activities, and habitat loss. Conservation of movement corridors may
promote long-distance movements and facilitate genetic exchange.

The early view version can be found here:


or upon request from the authors.



Nataly Castelblanco-Martínez, PhD
castelblanco.nataly at gmail.com

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