Tag Archive: whales

Researchers find whales enjoying pandemic quiet

Photo credit: Silvana Palacios from Pexels

by David M. Sykes, Vice Chair, The Quiet Coalition

While some humans are complaining about the enforced, stay-at-home quiet we’re living through now, biologists are embracing this once-in-a-lifetime opportunity to research the impacts on other mammals, in particular, marine mammals.

I think it’s wonderful that scientists are using this window in time to compare how other species are doing while we’re locked indoors. Turns out, the researchers say, many animals are doing just fine!

This article in the New York Times provides glimpses into the “re-wilding” of cities around the globe as other species emerge to take over the world we’ve temporarily abandoned. And other videos actually prompt a sense of hope that the planet can heal itself if we’ll just give it a chance.

David Sykes chairs several professional organizations in acoustical science: QCI Healthcare Acoustics Project, ANSI Committee S12-WG44, the Rothschild Foundation Task Force on Acoustics, and the FGI Acoustics Committee. He is lead author of “Sound & Vibration 2.0” (Springer, 2012), a contributor to the NAE’s “Technology for a Quieter America” and the GSA’s “Sound Matters,” and co-founded the Laboratory for Advanced Research in Acoustics at Rensselaer Polytech. A graduate of UC-Berkeley with advanced degrees from Cornell, he is a frequent organizer of professional conferences in the U.S., Europe, Asia and the Middle East.

Whales and noise

Photo credit: Minette Layne licensed under CC BY 2.0

Finally some good news about the problem of ocean noise, courtesy of The Noise Curmudgeon: The Canadian government is establishing a project to monitor ocean noise and protect endangered whales.

Said Terry Beech, parliamentary secretary to the minister of transportation, “[a]coustic disturbances, particularly underwater noise from vessels, are a problem for marine mammals such as the southern resident killer whales, who are having trouble finding the salmon, particularly Chinook salmon, that they need to flourish.” The goal is to study propeller noise and hull vibration, “the results of which could inform the design of new, quieter propellers.”

In these turbulent times, it’s good to see a government at least trying to do something to protect our natural environment.

Another unintended consequence of global climate change

 

Photo credit: Brian Gratwicke licensed under CC BY 2.0

The Independent reports that Arctic whales are “threatened by collisions and noise pollution as ships begin crossing melting sea ice.” Among other things, the article tells us that whales are more vulnerable to this recent intrusion because “noisy ships interfere with their communication and cause fatal collisions.”

It’s almost as if humans are trying to see how quickly we can destroy everything on this planet.

The danger of noisy oceans

Photo credit: Samuel Blanc licensed under CC BY-SA 3.0

We have posted before about how ocean noise is causing damage to various species of whales, so it should be no surprise to hear that human noise has thoroughly invaded our oceans. The Islands’ Sounder spoke to Christopher Clark, a bioacoustic engineer who he studies biology and acoustics, who discusses how “ambient noise from ships” interfered with his research on whales. Clark said that “[w]hat was eerie was that he could hear [ships’] rumble, but the ships were so far away they might as well have been invisible.” “North Atlantic right whales, like the Southern resident Orcas, are endangered,” adds Clark, who “suspects noise is a contributing factor for both species.” “You can’t listen to the ocean for any length of time without encountering human noise,” he laments.

The damage is not limited to whales, as ocean noise is damaging other species. Matt Soergel,The Florida Times-Union, reporting on research on dolphins in the St. Johns River, writes that researchers were surprised to find that “there’s no place [in the area they studied] immune to man-made sound,” and they are not sure why.  As for the effect on dolphins, the researchers aren’t quite sure, but “dolphins, especially in the murky tannin waters of the St. Johns, rely on sound to communicate and to hunt,” and the St. Johns’ dolphins have shown a decline in health.

And seals are suffering too, as researchers from the University of St. Andrews have discovered that “[s]eals may experience hearing loss from underwater vessel noise.” Although the researchers have said that there was “no evidence that seals were exposed to noise levels high enough to cause permanent hearing damage,” lead author Dr. Esther Jones added that “[u]rbanisation of the marine environment is inevitably going to continue, so chronic ocean noise should be incorporated explicitly into marine spatial planning and management plans for existing marine protected areas.”

Noise is not just a nuisance, it’s a public health issue for all species on this planet.

 

 

 

Why do whales beach themselves?

A new study suggests that they are trying to escape noise, reports news.com.au. The study “has found that startled beaked whales swimming away from low frequency sonar boost their energy consumption by more than 30 per cent.” Why is this important? Because the “study showed a big difference in the energy cost of whales swimming normally and attempting to escape danger,” and suggested that “In some cases fleeing whales might run out of steam and become washed up on beaches.”

Noise is not just a nuisance.

Link via Hyperacusis Research.

Mystery noise no longer mysterious:

The mystery of the ‘alien call’ deep in the Mariana Trench is solved. So, what’s the answer?  , wired.co.uk, writes that scientists at Oregon State University’s Hatfield Marine Science Centre, which named the sound the “Western Pacific Biotwang,” “likely represents the discovery of a new baleen whale call.”  So mystery (sorta) solved!

The cause of this noise is not a mystery:

not-quite-whales

Whales Would Probably Like Us To Make Less Noise In The Ocean.  Alasdair Wilkins, Vacativ.com, writes:

Whales’ haunting songs already suggest a complex form of communication beyond our easy understanding. Now it turns out we only knew half the story, as whales might also communicate through low-frequency vibrations they send through the water. Biologists only recently discovered this ability, and it might mean all our shipping and undersea drilling have been making a ton of unwanted, vibration-heavy noise for whales.

xxx