Noise pollution of the world’s oceans now poses such a serious threat to marine animals that urgent international action must be taken to counter it, an alarming new IFAW report warns today.

The report, Ocean Noise: Turn it down, highlights how steadily increasing man-made noise - particularly from shipping, sonar and seismic surveys - is interfering with marine mammals’ communication, dramatically altering their behaviour and injuring and even killing some whales and dolphins.

“Humanity is literally drowning out marine mammals,” said Robbie Marsland, Director of IFAW UK. “While nobody knows the precise consequences for specific animals, unless the international community takes preventive measures we are likely to discover only too late the terrible damage we’re causing.”

Ocean noise has doubled in each of the past four decades according to one Pacific study*. The world’s 100,000-strong commercial shipping fleet is identified as the biggest single man-made noise generator - and IFAW warns that by 2025 the gross cargo tonnage shipped internationally is forecast to double or even triple.

The report follows growing concern about ocean noise pollution from scientists and international bodies including the United Nations. It reveals that man-made noise is already making it harder for marine mammals to use their own sounds or echo-location to find food, prey and mates, to navigate and form group bonds.

The report also tells how ocean noise pollution is causing marine mammals to abandon habitat and vital activities such as feeding, as well as altering their surfacing and diving. Some whales have been forced to change their calls as they struggle to make themselves heard and the distance over which blue whales can communicate has been reduced by a staggering 90%.

IFAW’s ocean noise report especially condemns high intensity sound sources as a major threat, such as seismic surveys and military sonar used by the world’s navies to detect submarines. The colossal sounds these emit, well over 200 decibels, can injure marine animals and damage their hearing. High intensity sonar has also been linked by scientists to many fatal strandings of whales and dolphins. The stranding and deaths of 26 dolphins in Cornwall in June followed a Royal Navy exercise nearby, although no specific cause has yet been revealed. Post-mortem results are expected this autumn.

For further information, copies of the report or to arrange interviews contact the IFAW Press Office on 020 7587 6700. Alternatively visit www.ifaw.org