Tag Archives: Whales

Humpback whales intervene in orca attacks against other species

Humpback whales have been making the news for their organized “rescues” — seemingly heroic efforts in which the humpbacks have intervened in attacks by killer whales against other marine mammals.

Humpback whales come to the rescue of a Steller sea lion near Victoria, B.C. Photo: Alethea Leddy, Port Angeles Whale Watch Co.
Humpback whales come to the rescue of a Steller sea lion near Victoria, B.C. // Photo: Alethea Leddy, Port Angeles Whale Watch Co.

The humpbacks have not only protected their own calves but they have gone well out of their way to protect gray whales, minke whales, Dall’s porpoises, Steller sea lions, California sea lions, Weddell seals, crabeater seals, harbor seals, northern elephant seals and even ocean sunfish, according to researchers.

The latest incident, in which humpbacks reportedly intervened in a killer whale attack on a Steller sea lion, is said to be the first reported incident in the Salish Sea. The incident took place last week off Sooke, BC, about 20 miles west of Victoria.

“What we witnessed was pure aggression,” Capt. Russ Nicks of BC Whale Watch Tours of Victoria said in a news release from Pacific Whale Watch Association. “We had four humpbacks trumpeting, rolling on their sides, flukes up in the air multiple times.

“The killer whales split many times into two groups, with one that appeared to try to draw the humpbacks away from the sea lion. The other group would go in for the attack while the humpbacks were safely away – but then they’d get in the middle of it again, fighting the orcas off. It was amazing to watch.”

These killer whales were of the transient variety, a subspecies of killer whales that eats marine mammals, as opposed to the resident orcas that each fish.

The same attack and rescue was viewed by naturalist Alethea Leddy of Port Angeles Whale Watch Company, as reported in the news release:

“We got there in time to see some crazy surface activity, with humpback whales splashing in the distance along with orcas. Then two humpbacks surfaced next to us trumpeting, and the next thing we know there were four humpbacks, possibly six, all defending the sea lion.

“The water boiled all around as the orcas tried to separate the sea lion from the humpbacks. It was a wild scene, with the humpbacks even circling the sea lion trying to keep him safe while he frantically struggled to get his breath.

“The anxiety of the humpbacks was palpable, and they took turns diving and slashing at the orcas. This life-and-death drama went on and on until the four transient orcas, known as the T100 family, moved off in the distance. As they did, we saw the sea lion appear next to the humpbacks being guarded and escorted in the opposite direction.

“This was an unbelievable encounter. Hats off to our courageous humpbacks and best wishes to our little Steller sea lion, survivor for another day!”

In July, 14 marine mammal experts reported on 115 apparent rescue efforts by humpback whales during what appeared to be killer whale attacks on other species of marine mammals. Their report appeared in the journal Marine Mammal Science.

Reasons for these rescue efforts are open to much speculation, but the researchers noted that evidence is mounting in favor of a belief that killer whales that eat marine mammals, called MEKW, attack young humpback whales more often than commonly reported.

“Clearly, MEKW predation, even if rarely observed and targeting mainly calves and subadults, represents a threat to humpbacks that is persistent, widespread, and perhaps increasing,” the report states. “As such, humpbacks could be expected to show some specific anti-predator behaviors, and indeed some have been suggested. Ford and Reeves (2008) summarized the defensive capabilities of baleen whales faced with killer whale attack, and they identified two general categories of response.

“Balaenopterid rorquals (including fin whales and minke whales) use their high speed and hydrodynamic body shape to outrun killer whales and were classified as flight species. The generally more rotund and slower-swimming species — right whales, bowhead whales, gray whales and humpback whales — apparently rely on their bulk and powerful, oversized appendages (tail and flippers) to ward off attackers. This group was categorized as fight species.”

Of course, it is one thing for the humpbacks and other baleen whales to take a defensive posture. It is quite another thing for them to go after killer whales when another species of marine mammal is under attack.

In the report, humpbacks initiated encounters with MEKWs 58 percent of the time, while the killer whales initiated contact 42 percent of the time — at least for those cases when the killer whale ecotype could be identified as marine mammals eaters. On a few occasions when known fish-eating killer whales were involved, the encounter was relatively benign, the researchers said.

The video, shot by BBC filmmakers, show a pair of humpback whales attempting to prevent a group of orcas from killing a gray whale calf. In this case, the effort was unsuccessful.

When humpbacks went to the rescue of other marine mammals, it appears that the rescuers were generally a mixture of males and females, according to the report. Humpback postures, whether attacking or defending, involved slapping their flukes on the surface, slashing from side to side, bellowing, persuing and flipper slapping. The length of battles reported ranged from 15 minutes to seven hours. In the end, the prey that was at the center of the battles was killed 83 percent of the time — at least for those cases when the outcome was known.

“The humpback whale is, to our knowledge, the only cetacean that deliberately approaches attacking MEKWs and can drive them off, although southern right whales may also group together to fend off MEKWs attacking other right whales,” the researchers stated, adding that humpbacks’ powerful flippers covered in sharp barnacles can shred the flesh of their opponents.

When in hunting mode, transient killer whales are generally silent, not making much noise. Once an attack begins, they become more vocal, perhaps to coordinate the attack. It appears that humpbacks respond to killer whale vocalizations from distances well out of sight of the attack.

The reasons the humpbacks would get in a fight with killer whales to save another species are listed in three categories:

  • Kin selection: Protecting an offspring or closely related animal.
  • Reciprocity: Protecting unrelated animals, generally as part of a social organization.
  • Altruism: Benefitting another animal at some cost to the one taking action.

It is possible, the researchers conclude, that humpbacks could be improving their individual and group fitness to fend off attacks against their own by protecting other species. One idea is that the killer whales may think twice about attacking a humpback of any age.

“We suggest,” they write, “that humpbacks providing benefits to other potential prey species, even if unintentional, could be a focus of future research into possible genetic or cultural drivers of interspecific altruism.”

Will new guidance reduce hearing loss in whales and dolphins?

A new controversy is beginning to rumble over the potential injury to marine mammals from sounds transmitted in the water.

Transient killer whales Photo: Kitsap Sun
Transient killer whales // Photo: Kitsap Sun

The National Marine Fisheries Service, also called NOAA Fisheries, is moving closer to finalizing new “technical guidance” for assessing temporary and permanent hearing loss in whales and dolphins caused by human activities — including Navy sonar, seismic explorations and underwater explosions. The guidance will be used for approving “take” permits under the Marine Mammal Protection Act and Endangered Species Act.

Meanwhile, in another development, Navy officials have acknowledged that Navy personnel made a mistake by using sonar in Puget Sound without getting approval through the chain of command. I’ll describe the circumstances of that event in a moment.

Proposed noise guidance

The new “Draft Guidance for Assessing the Effects of Anthropogenic Sound on Marine Mammal Hearing” is a major revision from guidance in effect since the late 1990s. The document is currently going through its third public comment period since the end of 2013, having been updated and reviewed by three expert panels.

The new guidance is focused on hearing loss rather than how the behavior of marine mammals might change in the presence of loud noise. Since foraging and social activity are essential among whales and dolphins, further guidance is expected to assess how animals may be affected in other ways by noise.

The new guidance does not include mitigation measures for minimizing the effects of sound. In some cases, the new information may lead to additional protections for the animals, but in other cases protections may be reduced, according to information from NOAA Fisheries.

Currently, regulators use a single noise threshold for cetaceans (whales and dolphins) and a single threshold for pinnipeds (seals and sea lions). They do not account for the different hearing abilities within the two groups or how different types of sound may be experienced.

The new acoustic threshold levels divide sounds into two groups: 1) impulsive sounds lasting less than a second, such as from airguns and impact pile drivers, and 2) non-impulsive sounds, in which the sound pressure rises and declines more gradually, such as from sonar and vibratory pile drivers. Measures account for both peak sound pressure and cumulative sound exposure.

Marine mammals also are divided into groups based on their general range of hearing. There are the low-frequency cetaceans, including the large baleen whales; the mid-frequency cetaceans, including the dolphins; and the high-frequency cetaceans, including the porpoises.

The pinnipeds are divided into two groups. The eared seals, including sea lions, have a somewhat wider hearing range than true seals, including harbor seals.

After years of covering the effects of sonar and other noise, I’m just beginning to understand the complexity of how sound is measured and the mathematics used to calculate levels at various locations. At the same time, the guidelines are growing more complex — as they should to model the real world. New thresholds account for the duration of sound exposure as well as the intensity, and they somewhat customize the thresholds to the animals affected. For additional information, see NOAA’ Fisheries webpage on the guidance.

Despite incorporating new studies into the guidelines, some acoustics experts are finding serious problems with the methods used to arrive at the new thresholds, according to Michael Jasny of the Natural Resources Defense Council. The NRDC, an environmental group, has a long history of battling NOAA Fisheries and the Navy over sound exposures for marine mammals.

“This is an extremely technical subject,” Michael said, noting that he relies on experts who have provided comments on the methodology. “By and large, NMFS has drunk the Navy’s Kool-Aid with the exception of low-frequency effects, even though the Navy’s science has been sharply criticized.”

The statistical analyses leading to the guidelines are so flawed that they call into question how they could be used to protect marine mammals, Michael said, pointing to a paper by Andrew J. Wright of George Mason University.

“These are high stakes we are talking about,” Michael said. “We are talking about damaging the hearing of endangered species that depend on their hearing to survive.”

The effects of sound on behavior, which are not described in the new guidelines, may be just as important, he said, since too much noise can impede an animal’s ability to catch prey or undertake social behavior that contribute to the perpetuation of the species. NOAA Fisheries needs to move forward to raise the level of protection, not just for injury related to hearing but for other effects, he said. One can review a series of related studies on NOAA Fisheries’ website.

“If these guidelines are not improved, at least to address fundamental statistical errors, then it is easy to imagine that they might be legally challenged — and they would deserve to be,” Michael told me.

Sonar in Puget Sound

As for the Navy’s mistake with sonar, the story goes back to Jan. 13 of this year, when acoustics expert Scott Veirs of Beam Reach Marine Science picked up the sound of sonar on hydrophones in the San Juan Islands. About the same time, Ken Balcomb of the Center for Whale Research was observing transient killer whales to the south in Haro Strait.

At first, Scott believed the sonar may have been coming from the Canadian Navy ship HMCS Ottawa, but Canadian officials were quick to deny it. His suspicions shifted to the U.S. Navy. He was disturbed by that prospect since the Navy stopped using sonar during training exercises in Puget Sound shortly after the USS Shoup incident in 2003. For a reminder of that incident, check my story in the Kitsap Sun, March 17, 2005.

USS Shoup, a Navy destroyer based in Everett. U.S. Navy photo
USS Shoup, a Navy destroyer based in Everett. // U.S. Navy photo

Later, the requirement for approval from the Pacific Fleet command became an enforceable regulation when it was added to the letter of authorization (PDF 3.4 mb) issued by NOAA Fisheries. The letter allows the Navy a specific “take” of marine mammals during testing and training operations.

Within days of this year’s sonar incident, Scott learned from observers that two Navy ships had traveled through Haro Strait about the time that sonar was heard on a nearby hydrophone. Navy Region Northwest confirmed the presence of Navy vessels.

Later, Scott received an email from Lt. Julianne Holland, deputy public affairs officer for the Navy’s Third Fleet. She confirmed that a Navy ship used sonar for about 10 minutes at the time of Scott’s recording. The ship was identified as a guided missile destroyer — the same type as the Shoup — but its name has never been revealed.

“The Navy vessel followed the process to check on the requirements for this type of use in this location, but a technical error occurred which resulted in the unit not being made aware of the requirement to request permission,” according to Lt. Holland’s email to Scott. “The exercise was very brief in duration, lasting less than 10 minutes, and the Navy has taken steps to correct the procedures to ensure this doesn’t occur again at this, or any other, location.”

Because no marine mammals appeared to be injured, the story kind of faded away until I recently contacted Lt. Holland to tie up some loose ends. She ignored my questions about whether disciplinary actions had been taken against any Navy personnel. “The Navy has taken appropriate action to address the issue, including reissuance of specific guidance on the use of sonar in the Pacific Northwest.” The memo was sent to “all units in the Northwest.”

After I reopened the discussion, Scott did some acoustic calculations based on figures and graphs he found in a Navy report on the Shoup incident. He located published estimates of the source levels and concluded, based on NOAA’s old thresholds, that marine mammals within 10 kilometers (6.2 miles) would experience noise levels likely to change their behavior (level B harassment).

Based on the data available, Scott could not conclude whether the transient killer whales in Haro Strait were within that range, but he said it was encouraging that Ken Balcomb did not notice any changes in their behavior. It was also helpful that the sonar was used for a relatively short time.

“It was a little nerve racking to hear the Navy was making mistakes,” Scott said, “but we can give them a pat on the back for doing the exercise during the day” when lookouts on the ship at least have a chance to spot the animals.

Amusing Monday: Endangered species emerge as art forms

Painting large murals of endangered species on exterior walls across the U.S. is a way of “fostering connections between people and the other forms of life that surround them,” according to Roger Peet, a Portland artist who is leading the project, commissioned by the Center for Biological Diversity.

Whale mural in Los Angeles. Photo: Jess X. Chen
Whale mural in Los Angeles // Photo: Jess X. Chen

The latest mural, painted on a building in Los Angeles, shows a blue whale breaching off the coast of an urban area with an industrial skyline. The mural was painted from a massive stencil by Brooklyn street artists Icy and Sot, who are brothers, according to the website “Brooklyn Street Art.” The mural is designed to inspire protection for the whale and reduction of ocean pollution, the artists said in an interview.

Mountain caribou mural in Sandpoint, Idaho
Mountain caribou mural in Sandpoint, Idaho

The Center for Biological Diversity is perhaps best known for suing the federal government to list and protect declining species, but it has also been committed to public outreach, including the distribution of condoms featuring endangered species. The organization launched the mural project to call attention to at-risk wildlife specific to local communities where the murals are painted, according to the CBD’s website on the mural project.

The first mural in the series, featuring a mountain caribou, was painted in Sandpoint, Idaho, northeast of Spokane. This area of the Selkirk Mountains is the last remaining territory for the caribou in the lower 48 states. Mural artists Mazatl and Joy Mallari worked with Peet on the project.

Arctic grayling mural in Butte, Mont.
Arctic grayling mural in Butte, Mont.

“The city of Sandpoint unanimously approved the mural project for a prominent downtown building and passed a resolution supporting recovery of the caribou and augmentation of the southern Selkirk herd — exactly the kind of local support for endangered species our project is designed to foster,” states the CBD’s website.

The second mural, painted by Peet last summer in Butte, Mont., shows the Arctic grayling, a fish in the salmon family that was once common in Northern Montana, the headwaters of the Missouri River. Because of river diversions and pollution, the fish population has declined dramatically. In the lower 48 states, the fish survives only in a stretch of the Big Hole River near Butte. The Montana Standard has the story.

Monarch butterfly mural in Minneapolis, Minn.
Monarch butterfly mural in Minneapolis, Minn.

A monarch butterfly on a wall in South Minneapolis, Minn., is the third mural in the series. In late summer, monarchs undergo metamorphosis in Minnesota and other northern regions before migrating to Mexico for the winter and then to the southern U.S., where they lay their eggs. Pesticide and development have taken a toll on the monarch habitat and reduced their population by 80 percent over the past 20 years, according to the CBD website. Peet worked with Barry Newman on the mural.

In November, a mural featuring the watercress darter was completed in Birmingham, Ala. This small, brilliantly colored fish is found only in the Birmingham area. Peet worked with Birmingham artists Merrilee Challiss and Creighton Tynes on the mural.

Watercress darter mural in Birmingham, Ala. Photo: Kyle Crider
Watercress darter mural in Birmingham, Ala.
Photo: Kyle Crider

“Birmingham was selected as the site of darter mural because Alabama is a world hotspot for freshwater animal diversity, and the center is working to protect hundreds of Alabama species from extinction,” says a news release from the Center for Biological Diversity.

Upcoming murals include a mussel — the pink mucket — in Knoxville, Tenn., an aquatic salamander — the Ozark hellbender — in St. Louis, Mo., multiple fish of the Colorado River on the Navajo reservation in Arizona, and bull trout in Oakridge, Ore. Organizers say more murals could be painted with additional funding and support from local artists.

Painter Roger Peet, who continues to manage the mural project, says the effort is built upon the biodiversity of individual places:

“Those species embody an area’s natural history and contribute to what makes it irreplaceable. They also have something to say about the future, as many are in danger of going extinct. And when we lose species, the places and lives we live become poorer and shallower places as a result.

“To help bring these species into the light, we decided to paint them on the walls… Whether that’s a fish in a river, a butterfly flitting from plant to plant or a caribou chewing lichen off a tree trunk, we’re bringing together artists and communities to create big, bold images that will become part of the neighborhoods where they’re created, making it a little easier for people to care about the native species struggling to survive in their midst.”

All photos courtesy of the Center for Biological Diversity.

Research on ocean noise could help save whales

In the underwater world, where hearing can be more important than sight, whales are being bombarded by a cacophony of sounds, which started cluttering up their lives when the first steamships were launched into the ocean.

J-1, known as “Ruffles,” uses echolocation clicks to locate chinook salmon as a tanker approaches in Haro Strait near the San Juan Islands. J-1 was the oldest male among the Southern Resident killer whales when he died in 2011. Photo: beamreach.org (CC BY SA)
J-1, known as “Ruffles,” uses echolocation clicks to locate chinook salmon as a tanker approaches in Haro Strait near the San Juan Islands. J-1 was the oldest male among the Southern Resident killer whales when he died in 2011. // Photo: beamreach.org

Now, after 200 years, people are beginning to care about the kinds of noise imposed upon marine mammals and other creatures. To a limited extent, research can now answer this important question: How are humans affecting marine life with noise coming from our ships and boats, our ocean exploration and construction, and our military exercises.

It is time to think about how we can apply new scientific knowledge in a more meaningful way than current regulations, which depend on putting a “safe” distance between one vessel and one whale.

A month ago in “Amusing Monday,” I featured the music of Dana Lyons, who wrote a song about sound from the perspective of the whales. The song got me to thinking about how the sailing ships of yesteryear must have been so much more pleasant for the whales — assuming, of course, that they weren’t whaling ships.

Scott Veirs, an oceanographer, joined forces with his dad, physicist Val Veirs, to operate a hydrophone network based in the San Juan Islands, where they study the sounds of whales, ships and anything else that makes sounds in the waters of the Salish Sea.

“We are trying to get a statistically significant characterization (of sound),” Scott told me. “For me, the question is: Does this make a difference for certain species? To be honest, I’m seeing lots of evidence in the emerging literature that ship noise really does make a difference.”

Scott and Val, along with acoustics expert Jason Wood, recently published a research paper in the journal “Peer J.,” in which they describe their acoustic encounters with more than 3,000 ships passing by their hydrophones. Through careful calibration of their instruments, they were able to calculate sound levels at the source — which can tell us which ships and boats produce the most noise before attenuation of the sound through the water. Check out the news release, or read the entire article.

It has long been known that cargo ships and other large vessels produce low-frequency sounds that can travel great distances in seawater. That adds to an overall background noise that seems to be increasing over time. For baleen whales, who communicate with lower-frequency sounds, this changing soundscape could be something like the difference between a person living downtown in a busy city and a person living in the country.

In an interesting but unplanned study after the 9/11 attacks of 2001, researchers were able to show that right whales in Canada’s Bay of Fundy had lower stress hormone levels immediately after the attacks. That’s when ship traffic — and noise — were significantly lowered. The findings were limited to the short time frame that ship traffic diminished, but the researchers were fortunate that fecal samples from another study could be used to measure stress hormones before and after 9/11. Review the paper: Evidence that ship noise increases stress in right whales.

It was not a big surprise that large ships can affect baleen whales, but Scott and his colleagues were able to show that large ships produce not only low-frequency sounds but also high-frequency sounds in the hearing range of killer whales.
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      1. Sounds from a passing ship

Sounds from a passing ship are picked up on a hydrophone in Haro Strait.
Sound file: beamreach.org


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“The noise does extend up into the range where whales hear well,” Scott told me, “but that does not answer whether it matters to killer whales.”

He said the challenge for orcas is to hear the reflection of high-frequency clicks sent out by an orca to locate chinook salmon and other prey. The echolocation clicks are loud as they leave the whale, but the return signal they are attempting to hear can be faint unless the fish are very close, Scott said. If other high frequency sounds, such as from nearby boats, interfere with their hearing, then the whales may struggle to locate their prey, he noted.

“My greatest concern is how much a single container ship might decrease the range that a killer whale would be able to hear the echo,” Scott said. “The impact in terms of decreasing their foraging range is really kind of scary.”

Studies of various ships might identify what is causing the high-frequency sounds and lead to a technological solution to the problem, Scott said. Military ships are designed to be quiet, and some of that technology could be transferred to commercial vessels. If the noise from just 10 percent of the noisiest vessels could be reduced, it could lead to a significant improvement in the noisy ocean.

Digital acoustic recording tags are used to measure sound levels felt by killer whales. NOAA photo
Digital acoustic recording tags are used to measure sound levels felt by killer whales. // NOAA photo

The question of how much high-frequency noise reaches the killer whales was the focus of a study conducted by researchers from the University of Washington and NOAA Fisheries. Researchers used suction cups to temporarily attach digital acoustic recording tags, or d-tags, to killer whales to measure the level of sound. They also used laser-positioning equipment operated from a research boat to measure the size, speed, location and type of vessel emitting the noise.

“The goal was to understand this missing but assumed link between what we see at the surface and what the whales experience at depth,” said Juliana Houghton, a recent UW graduate and lead author of the study, who was quoted in a UW news release.

A key finding was that the number of propellers on a vessel influenced the sound volume, but the most important factor was the speed of the vessel — with higher speeds producing significantly more high-frequency noise. The findings were published in the journal PLOS ONE.

Taking these and other studies together could help chart a path toward quieter vessels, less noise around whales and ultimately a better outcome for marine mammals dependent on underwater communication and echolocation.

Port Metro Vancouver in British Columbia has taken these ideas one step further with a hydrophone listening station installed in the inbound shipping lanes in the Strait of Georgia north of the U.S. border. The listening station is part of a program called Enhancing Cetacean Habitat and Observation (ECHO). The listening station will monitor the noise of identified ships passing through. See news release from the port.

The video below shows the deployment of the listening station in the Strait of Georgia in British Columbia.

From what I know about the system, it could potentially lead to an individual sound profile for each ship entering Canadian waters, and authorities could investigate whether slowing certain vessels could reduce noise for whales in the area.

“The ECHO program’s long-term goal is to develop mitigation measures that will lead to a quantifiable reduction in potential threats to whales as a result of shipping activities,” Duncan Wilson, vice president of corporate social responsibility at Port Metro Vancouver, said in an op-ed piece in the Vancouver Sun.

“These mitigation measures may include incentives for the use of green vessel technology, changes to operational activities of ocean-going vessels, a certification program for quiet vessels, and/or the development of noise criteria for vessels entering the port,” he added.

Report

A 2013 report by World Wildlife Fund–Canada (PDF 2.6 mb) makes the case for developing tools to better manage noise. The 96-page report, which came out of a 2012 workshop on ocean noise in Canada, concluded that the ability to profile individual ships could lead to these ideas for reducing noise:

  • “Use existing data on noise output from different sizes and classes of vessels, and establish percentage criteria below which ships should fall. Vessels above the criteria would face pecuniary consequences, e.g., higher port fees…
  • “Shipping noise should not be allowed to reduce whale communication space beyond a certain percentage … Masking is a significant threat to marine animals.
  • “Establish a cumulative noise exposure level…, rather than only maximum event-based exposure criteria for individual populations.
  • “Develop a report card system that identifies the noisiest 10% of vessels passing over a noise monitoring station. In the absence of legislation, letters could be sent to vessel owners advising them of their noisy ships, and a list of worst offenders could be published. Letters could also be sent to the owners of quiet ships, congratulating them on their reduced contribution to the soundscape.
  • “Ports could adopt maintenance requirements for noisy ships, as poor vessel maintenance is the source of extraneous noise on approximately 10 percent of merchant ships.
  • “A mandatory phased-in program could be established to incentivize quietening technologies for retrofitted vessels. Proposed new projects could require quietened ships.”

Although the United States began regulating the effects of ocean noise earlier than most countries — as early as the 1980s — U.S. agencies have been slow to keep up with the best available science, according to Michael Jasny of the Natural Resources Defense Council, who wrote a chapter in the WWF report,

Jasny’s recommendations:

Be honest about estimating effects: U.S. sound thresholds for marine mammals assume that 120 decibels of “continuous” noise or 160 decibels of “intermittent” noise have an adverse behavioral effect, while noise above 180 decibels is considered injurious. But these numbers fail to account for differences in species, bias in observed impacts and masking effects. This makes the thresholds “outdated” and “insufficiently conservative.”

Think cumulatively: Regulators and managers should look beyond the effects of a single sound exposure to the effects of noise over time on the population of animals from all sources of noise.

Evolve beyond the near field: The traditional approach has been a “safety zone,” in which sound sources are powered down when marine mammals get within a specified range. The U.S. has begun to move beyond this simple idea to habitat-based management, including area closures for important habitats when marine mammals are likely to be present. Also under review are technical alternatives to reduce noise from ships, airguns (used in seismic studies) and pile-driving equipment.

Orca Network plans to ‘Livestream’ Ways of Whales Workshop

Tomorrow is the annual Ways of Whales Workshop on Whidbey Island, a chance to enjoy the company of top-level whale experts, careful observers of marine mammals and people inspired by nature.

Ways

Tickets will be available at the door. Go to “Ways of Whales Workshop” for the schedule and details, such as lunch and the post-workshop gathering at Captain Whidbey Inn.

For those who cannot attend, Orca Network is planning to stream the event live on the Internet. Connect with the Livestream network to join the event via computer.

In addition to speakers providing the latest information about orcas, humpbacks and other species, Howard Garrett of Orca Network will discuss progress in the long-running effort to return Lolita, or Tokitae, from the Miami Seaquarium to her original home in the Salish Sea.

For this blog post at least, I will go with Howie’s suggestion that we call the whale “Toki.” “Tokitae” was the first name she was given, and Howie says her trainers and staff in Miami shortened that to “Toki.”

“She is accustomed to being called ‘Toki,’ so now with indications that a combination of changing public attitudes, questionable revenue prospects and legal developments may actually bring her home some day soon, ‘Toki’ sounds fitting and proper,” Howie wrote in a recent email to supporters.

"Toki's retirement home," as Howard Garret calls it. Photo: Orca Network
“Toki’s retirement home” in the San Juan Islands, as Howard Garrett calls it.
Photo: Orca Network

A lawsuit involving Toki is scheduled for trial in May, although the date could change. The lawsuit claims that keeping her in captivity is a violation of the Endangered Species Act. If you recall, she was listed as a member of the endangered Southern Resident pods following a legal dispute with the federal government — but so far that determination has been of little consequence.

The latest lawsuit will consider, at least in part, the plan to return Toki to the San Juan Islands, where she would be kept in an open net pen until she can be reunited with her family. If a reunion does not work out, she would be cared for under better conditions than in a confined tank for the rest of her life, or so the plan goes.

It came as a surprise when Howie told me that attorneys for the Miami Seaquarium plan to visit the exact site in the San Juan Islands where Toki would be taken. One argument will consider which location — a tank in Miami or natural waters of the San Juans — would be more suitable for her health and well-being. Of course, attorneys for the Seaquarium will argue that she has done well enough for the past 40 years, so leave her alone.

Howie said he is hopeful that efforts by the investment firm Arle Capital to sell off the company that owns Miami Seaquarium (Spain’s Parques Reunidos) will help with the cause to return Toki to Puget Sound. (See Reuters report.) Perhaps the whale’s value has diminished as an investment, encouraging corporate owners to try something new?

Amusing Monday: Time-warp view of ‘Fish from Hell’

If this week’s film “Fish from Hell” is any indication, Americans’ view of life in the ocean has changed considerably since 1945. (Scroll down for video player.)

I found this film in the Prelinger Archives, a large collection of old films and television commercials started in 1983 by Rick Prelinger in New York City.

It’s a longer video than I usually offer for Amusing Monday. But if you pick any point on either of the two video segments you will find something interesting, if not shocking. If you are limited on time, check out Part 2 at 2 minutes, 50 seconds, where the fear of a large octopus is truly amusing, knowing what we know about these creatures in Puget Sound. The storyline of “man against nature” seems quaint from a modern scientific perspective, but I wonder how many people still hold this world view.
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