[MARMAM] New paper on Bottlenose dolphin group dynamics, site fidelity, residency and movement patterns in Madeira Archipelago

ana.dinis at ciimarmadeira.org ana.dinis at ciimarmadeira.org
Tue Jul 5 07:52:36 PDT 2016

Dear colleagues, 


We are pleased to announce the publication of a new paper:


A Dinis, F Alves, C Nicolau, C Ribeiro, M Kaufmann, A Cañadas & L Freitas
(2016): Bottlenose dolphin Tursiops truncatus group dynamics, site fidelity,
residency and movement patterns in the Madeira Archipelago (North-East
Atlantic), African Journal of Marine Science, DOI:




The bottlenose dolphin Tursiops truncatus is one of the most frequently
sighted cetacean species in the Madeira Archipelago (North-East Atlantic);
however, little is known about its population ecology in these waters.
Photo-identification undertaken during systematic, non-systematic and
opportunistic surveys conducted between 2001 and 2012 was used to assess
group dynamics, site fidelity, residency and movement patterns of bottlenose
dolphins in the archipelago. Three different patterns of residency were
assigned, based on individual sighting histories. Group size ranged between
2 and 90 individuals (median 12), with no significant monthly difference in
group size. All resident dolphins formed a core, complex network with
migrant and transient dolphins. In contrast, satellite clusters were formed
exclusively by transient individuals. The lagged identification rate (LIR)
model indicated that a dolphin remained in the area for an average of 90
days, whereas the average time an individual spent outside the study area
was approximately 313 days. The Madeira Archipelago appears to be only a
section of a much larger home range for this population, with the dolphins
exhibiting three different patterns of occurrence that associate with each
other. The information gained about this poorly studied population
contributes to the overall knowledge of bottlenose dolphins in insular
oceanic habitats.



For an early view of this paper, please visit:



If you are unable to download the article, send an email request to:
<mailto:ana.dinis at ciimarmadeira.org> ana.dinis at ciimarmadeira.org





Ana Dinis, PhD



Phone: +351  291 721 216



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