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Underwater noise affects marine animals’ relationships But to what extent?

Source: universiteitleiden.nl

Human activity at sea makes a terrible racket. To what extent does this disturb marine animals? PhD candidate Annebelle Kok studied the effect on harbour porpoises, long-finned pilot whales and their prey, and discovered the sheer complexity of the problem. PhD defence on 12 November.

The days when the sea was the preserve of fish, crabs and dolphins are long gone. In many submarine areas, there is a constant backdrop of noise: ships chugging, the thud of pile driving for offshore wind farms and the boom of seismic oil-reserve surveys. Human influence is omnipresent, and above all audible.

For her dissertation, biologist Annebelle Kok researched the effect of all this human noise on different marine mammals and their prey. Does the noise change the hunting and flight behaviour of these predators and their prey change? And if so, can this disturb the balance of the ecosystem, and as a worst-case scenario, lead to species extinction? MORE