Narwhals react to ship noise and airgun pulses embedded in background noise

Outi Tervo, Susanna Blackwell, Susanne Ditlevsen, Alexander Conrad, Adeline Samson, Eva Garde, Rikke Hansen & Mads Peter Heide-Jørgensen
Anthropogenic activities are increasing in the Arctic posing a threat to species with high seasonal site-fidelity, such as the narwhal Monodon monoceros. In this controlled sound exposure study, six narwhals were live-captured and instrumented with animal-borne tags providing movement and behavioural data, and exposed to concurrent ship noise and airgun pulses. All narwhals reacted to sound exposure by reduced buzzing rates, where the response was dependent on the magnitude of exposure defined as 1/distance to...
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2 downloads reported since publication in 2021.

These counts follow the COUNTER Code of Practice, meaning that Internet robots and repeats within a certain time frame are excluded.
What does this mean?