The effects of anthropogenic noise on cetaceans in Brazil: the need to consider recent scientific advances in environmental licensing

摘要

Anthropogenic noise can impact cetaceans, leading to masking, stress, and auditory damage, among other effects. Recent studies have emphasized the need to understand these impacts on marine organisms, for which cetaceans may be used as ecological models. However, it is unclear whether public policy-making in the countries that present the same concern. We used the Brazilian environmental licensing legislation as a case study to investigate whether governments have addressed the scientific advances on the effects of anthropogenic noise on cetaceans. The study was based on a systematic review of the literature on the impacts of anthropogenic noise on cetaceans, and a survey of the environmental licensing reports related to the construction of shipping facilities and seismic activity. None of these reports evaluated the potential impacts on cetacean acoustics, and 59.6% were based solely on a review of the literature. Our results highlight the importance of measuring the acoustic variables of the noise produced by human activities. We conclude that governments should include the recent scientific advances on the effects of anthropogenic noise on cetaceans in their environmental legislation and licensing requirements.