Risk-taking behavior in three Fulica species inhabiting an urban coastal lagoon in Mar del Plata city, Buenos Aires province, Argentina

Juan P. Seco Pon; Maximiliano M. Hernandez; Ángeles Castillo Ilabaca; María P. Berón

doi:10.25260/EA.26.36.2.0.2607

Authors

Juan P. Seco Pon Grupo Ecología y Conservación de Aves Marinas y Costeras, Instituto de Investigaciones Marinas y Costeras, IIMyC (FCEyN, UNMdP-CONICET). Mar del Plata, Buenos Aires, Argentina https://orcid.org/0000-0003-2480-5455
Maximiliano M. Hernandez Grupo Ecología y Conservación de Aves Marinas y Costeras, Instituto de Investigaciones Marinas y Costeras, IIMyC (FCEyN, UNMdP-CONICET). Mar del Plata, Buenos Aires, Argentina https://orcid.org/0000-0001-9673-2721
Ángeles Castillo Ilabaca Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata. Mar del Plata, Buenos Aires, Argentina
María P. Berón Grupo Ecología y Conservación de Aves Marinas y Costeras, Instituto de Investigaciones Marinas y Costeras, IIMyC (FCEyN, UNMdP-CONICET). Mar del Plata, Buenos Aires, Argentina https://orcid.org/0000-0003-3860-5980

DOI:

https://doi.org/10.25260/EA.26.36.2.0.2607

Keywords:

coot, disturbance, flight initiation distance, Buenos Aires province, Argentina

Abstract

1. Urbanisation is taking place globally at a rapid pace and is generally linked to negative impacts on biodiversity at local, regional, and global scales. Evaluating the behavioural response profiles to urbanisation helps identify which species show adaptive responses to changing landscapes and are thus more or less likely to persist in such environments.
2. For this, we experimentally approached and measured associated flight initiation distance (FID) in three taxonomically related aquatic bird species (Fulica leucoptera, F. rufifrons and F. armillata) inhabiting an urban wetland located in the large coastal city of Mar del Plata, Buenos Aires province. We also assessed how environmental, ethological and anthropic variables affected this behaviour for the overall studied coots.
3. Pooled together, coots’ FID ranged from 3.0 to 18.7 m and showed no statistical differences between species.
4. The mean FID estimated for all coot species combined was only affected by wind direction, with wind blowing from the south being the most important environmental stressor affecting coots’ FID.
5. When considering each coot species separately, the abundance of conspecifics also affected FID in F. rufifrons, decreasing it by half.
6. Implications. Overall, the studied coot species exhibit a passivity to the disturbance exerted by a pedestrian approach, given their relatively short flight initiation distances. This finding is in line with available research on other aquatic bird species dwelling in urban ecosystems, suggesting that certain waterbird taxa may be pre-adapted to persist in urbanised environments.

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