[MARMAM] New publication: Baleen whale acoustic presence and behaviour at a Mid-Atlantic migratory habitat, the Azores Archipelago

Miriam Romagosa m.romagosa4 at gmail.com
Mon Mar 16 12:42:54 PDT 2020


Dear Marmam subscribers,

We are pleased to announce the publication of the following article in
Scientific Reports journal

Romagosa, M., Baumgartner, M., Cascão, I. et al. Baleen whale acoustic
presence and behaviour at a Mid-Atlantic migratory habitat, the Azores
Archipelago. Sci Rep 10, 4766 (2020).
https://doi.org/10.1038/s41598-020-61849-8

The identification of important areas during the annual life cycle of
migratory animals, such as baleen whales, is vital for their conservation.
In boreal springtime, fin and blue whales feed in the Azores on their way
to northern latitudes while sei whales migrate through the archipelago with
only occasional feeding. Little is known about their autumn or winter
presence or their acoustic behaviour in temperate migratory habitats. This
study used a 5-year acoustic data set collected by autonomous recorders in
the Azores that were processed and analysed using an automated call
detection and classification system. Fin and blue whales were acoustically
present in the archipelago from autumn to spring with marked seasonal
differences in the use of different call types. Diel patterns of calling
activity were only found for fin whales with more calls during the day than
night. Sei whales showed a bimodal distribution of acoustic presence in
spring and autumn, corresponding to their expected migration patterns. Diel
differences in sei whale calling varied with season and location. This work
highlights the importance of the Azores as a migratory and wintering
habitat for three species of baleen whales and provides novel information
on their acoustic behaviour in a mid-Atlantic region.

The publication is available online at:
https://www.nature.com/articles/s41598-020-61849-8

Kind regards,

-- 
Miriam Romagosa
PhD candidate
IMAR - Institute of Marine Research & Okeanos I & D Centre
DOP - Department of Oceanography and Fisheries
University of the Azores
Rua Professor Dr. Frederico Machado 4
9901-862 Horta
Portugal
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