Acoustic partitioning in a marine vertebrate community off Brazil
1 : Laboratório de Bioacústica - Universidade Federal do Rio Grande do Norte
(LaB - UFRN)
Universidade Federal do Rio Grande do Norte, Centro de Biociências, Departamento de Fisiologia. AC Universidade Federal do Rio Grande do Norte, Laboratório de Bioacústica Lagoa Nova 59078970 - Natal, RN - Brasil Telefone: (084) 32153409 -
Brazil
2 : Instituto Chico Mendes de Conservação da Biodiversidade
(ICMBio)
Centro Nacional de Pesquisa & Conservação de Mamíferos Aquáticos, ICMBio, MMA CMA SC, Rod. Mauricio Sirotsky Sobrinho, s/n, km02, Jurerê, Florianópolis, SC, 88053-700, BRASIL -
Brazil
3 : Projeto Baleia Franca
(PBF)
Av. Atlântica, s/no. Praia de Itapirubá Norte 88780-000 - Imbituba, SC - Brasil - Caixa-postal: 201 -
Brazil
4 : Syracuse University
* : Corresponding author
Syracuse University, Department of Biology, 114 Life Sciences Complex Syracuse NY 13244 -
United States
In order to increase intra-specific communication efficacy and to decrease
probability of miscommunications errors and masking a certain degree of
partition of a community`s acoustic space is expected. Aiming to
investigate the acoustic partitioning of a marine vertebrate community
composed by fish, dolphin and whale species, eight acoustic features
(aggregate entropy, average entropy, 90% bandwidth, center frequency,
90% duration, interquartile bandwidth, low frequency and peak frequency)
of calls manually extracted from recordings off Brazil were submitted to
discriminant function analysis (DFA). Results show that species are
discriminated in acoustic space and thus occupy different acoustic niches.
All acoustic features significantly contribute to species` discrimination.
Function 1 explained 95,9% of the variation in the acoustic parameters
due to species. The most important parameters were central frequency,
interquartile bandwidth and average entropy. Spectral partitioning may
also function as a mechanism to avoid masking in this marine community.
Work supported by: Rufford Small Grants Foundation (RSGF), Cetacean
Society International (CSI), Instituto Chico Mendes de Conservação da
Biodiversidade (ICMBIO), Projeto Baleia Franca (Project Right Whale) and
Federal University of Rio Grande do Norte (UFRN)
| Subject : | : | Talk |
| Topics | : | Dynamics I |
| Keywords | : | acoustic partition ; acoustic ecology ; marine community ; vertebrate communication ; acoustic niche |
| PDF version | : |  PDF version |
