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Year round rocky shore soundscape off the Island of Cabo Frio

Underwater Acoustics Conference and Exhibit 2019, Hersonissos (Grecce)

F.C. Xavier fabiofcx(at),
N.G. Silveira nilce.ngs(at),
A.G. Guarino guarino(at),
J. Osowsky jeff.osowsky(at),
R.P. Florencio (N/A),
R.P. Vio renato.vio(at),
E.B.F. Netto eb-netto(at),
M.V. Simoes simoes(at),
IEAPM, Arraial do Cabo (RJ), Brazil.
S.M. Jesus sjesus(at),
LarSys, Universidade do Algarve, Campus de Gambelas, 8005-139 Faro (Portugal).

Comments: no download.
Ref.: in UACE'2017, Hersonissos (Greece), July 2019 (invited).

The Island of Cabo Frio is situated a the southeastern tip of the Brazilian coast, by 23 degrees south, at the edge of the tropical to the southern Atlantic ocean. The area is exposed to a strong upwelling regime from south under strong northeastern wind, predominant in spring and summer. A four hydrophone tripod is installed in a 8m depth location since February 2018, circa 20 m away from a rocky shore, a settling of abundant invertebrate life, mainly barnacles, snapping shrimp, sea urchins and bivalves. These species are distributed according to the rocky shore zonation pattern, producing sound at different levels, frequency bands and times of the day, forming a characteristic chorus. This work aims at characterizing the recorded bio-acoustic signature, its natural variation throughout the year, as well as its relation with other biotic and abiotic factors, such as water temperature (namely that due to upwelling), wind, tide and sun light. The relationship between these factors and the bio- acoustic signature variation may contribute to the understanding of rock shore organisms behavior and potentially to biotechnological applications.

ACKNOWLEDGMENT: This work was funded under project BIOCOM, from CsF (Brazil).