Dear all,
We are pleased to share our new publication:
Estrade V, Dulau V. 2020. Abundance and site fidelity of bottlenose
dolphins off a remote oceanic island (Reunion, southwest Indian Ocean).
Marine Mammal Science, 2020:1-26.
*Abstract*
This study represents the first comprehensive assessment of the
population dynamics and residency of common bottlenose dolphin around
Reunion Island (southwest Indian Ocean). Understanding dynamics and
movement patterns of this local population is essential to guide
effective conservation efforts, notably in a context of growing dolphin
watching activities. Dedicated surveys based on photoidentification
methods were conducted over 6 years (2010–2015). The species was present
year-round, in groups of 25 individuals on average (1–150). Jolly-Seber
mark-recapture models resulted in a population estimate of 254
individuals (95% CI = 191–337) and an apparent annual survival rate of
0.83. The population was almost equally split into three residency
patterns: residents (33.1%), long-term visitors (32.6%), and short-term
visitors (34.3%, including transients, i.e., individuals only seen once
[14.9%]), suggesting that the majority of the population showed a
moderate-to-high level of residency in the study area. Individuals from
the three residency patterns associated
randomly, mixing together and forming a single community. Models based
on the lagged identification rate indicated emigration and reimmigration
to the survey area, with some individuals occupying the study area for
about 2 years (832 days), and remaining outside for an average of 276
days, probably exhibiting larger home ranges and extensive movement
behavior.
Available at : _https://doi.org/10.1111/mms.12693_
For a pdf copy, please contact: vanessa.estr...@globice.org
<mailto:vanessa.estr...@globice.org>
All the best,
Violaine Dulau
GLOBICE-Reunion
www.globice.org
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