[MARMAM] New publication: Changes in whistle parameters of two common bottlenose dolphin ecotypes as a result of the physical presence of the research vessel

Simone Antichi santichi_20 at alu.uabcs.mx
Mon Oct 10 16:57:41 PDT 2022

Dear MARMAM community,
My co-authors and I are very pleased to announce the publication of our new
paper in Peerj journal.

Antichi, S., Urbán, J., Martínez-Aguilar, S., & Viloria-Gómora, L. (2022).
Changes in whistle parameters of two common bottlenose dolphin ecotypes as
a result of the physical presence of the research vessel. PeerJ, 10,
e14074. https://doi.org/10.7717/peerj.14074

In the presence of vessels, dolphins have been found to change their
habitat, behavior, group composition and whistle repertoire. The
modification of the whistle parameters is generally considered to be a
response to the engine noise. Little is known about the impact of the
physical presence of vessels on dolphin acoustics. Whistle parameters of
the coastal and oceanic ecotypes of common bottlenose dolphins in La Paz
Bay, Mexico, were measured after the approach of the research vessel and
its engine shutdown. Recordings of 10 min were made immediately after
turning off the engine. For analysis, these recordings were divided from
minute 0 to minute 5, and from minute 5:01 to minute 10. The whistles of
the oceanic ecotype showed higher maximum, minimum and peak frequency in
the second time interval compared to the first one. The whistle rate
decreased in the second time interval. The whistles of the coastal ecotype
showed no difference between the two time intervals. The physical presence
of the research vessel could have induced a change in the whistle
parameters of the oceanic dolphins until habituation to the vessel
disturbance. The oceanic ecotype could increase the whistle rate and
decrease the whistle frequencies to maintain acoustic contact more
frequently and for longer distances. The coastal ecotype, showing no
significant changes in the whistle parameters, could be more habituated to
the presence of vessels and display a higher tolerance.

The paper is open access and can be downloaded at:

If you have any questions regarding our work please contact this email:
santichi_20 at alu.uabcs.mx , lviloria at uabcs.mx

Kind regards,
Simone Antichi
PhD candidate
Departamento de Ciencias Marinas y Costeras, Universidad Autónoma de Baja
California Sur, La Paz, Baja California Sur, Mexico.
email: santichi_20 at alu.uabcs.mx
cell: +52 612 228 5196
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