Small reductions in cargo vessel speed substantially reduce noise impacts to marine mammals.

Autor:	Findlay CR; Zoophysiology, Department of Biology, Aarhus University, Aarhus 8000, Denmark., Rojano-Doñate L; Zoophysiology, Department of Biology, Aarhus University, Aarhus 8000, Denmark.; Department of Ecoscience, Aarhus University, Aarhus 8000, Denmark., Tougaard J; Department of Ecoscience, Aarhus University, Aarhus 8000, Denmark., Johnson MP; Zoophysiology, Department of Biology, Aarhus University, Aarhus 8000, Denmark., Madsen PT; Zoophysiology, Department of Biology, Aarhus University, Aarhus 8000, Denmark.
Jazyk:	angličtina
Zdroj:	Science advances [Sci Adv] 2023 Jun 23; Vol. 9 (25), pp. eadf2987. Date of Electronic Publication: 2023 Jun 21.
DOI:	10.1126/sciadv.adf2987
Abstrakt:	Global reductions in the underwater radiated noise levels from cargo vessels are needed to reduce increasing cumulative impacts to marine wildlife. We use a vessel exposure simulation model to examine how reducing vessel source levels through slowdowns and technological modifications can lessen impacts on marine mammals. We show that the area exposed to ship noise reduces markedly with moderate source-level reductions that can be readily achieved with small reductions in speed. Moreover, slowdowns reduce all impacts to marine mammals despite the longer time that a slower vessel takes to pass an animal. We conclude that cumulative noise impacts from the global fleet can be reduced immediately by slowdowns. This solution requires no modification to ships and is scalable from local speed reductions in sensitive areas to ocean basins. Speed reductions can be supplemented by routing vessels away from critical habitats and by technological modifications to reduce vessel noise.
Databáze:	MEDLINE
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