Saving Seafood

An ocean of noise: how sonic pollution is hurting marine life

April 12, 2022 — We were whaling with cameras, joining a flotilla of a dozen other tourist boats from harbours all around the Salish Sea. It was one of my first trips to the area, in August 2001. The fuzz and beep of ship radios stitched a net over the water, a blurry facsimile of the sonic connections of the whales themselves. Every skipper heard the voices of the others, relayed by electromagnetic waves. The quarry could not escape. “Whales guaranteed” shouted the billboards on shore.

We motored on, weaving around island headlands. A sighting off the south-west shore of San Juan Island. Through binoculars: a dorsal fin scythed the water, then dipped. Another, with a spray of mist as the animal exhaled. Then, no sign. But the whales’ location was easy to spot. A dozen boats clustered, most slowly motoring west, away from the shore. We powered closer, slowing the engine until we were travelling without raising a wake and took our place on the outer edge of the gaggle of yachts and cruisers.

A sheet of marble skated just under the water’s surface. Oily smooth. A spill of black ink sheeting under the hazed bottle glass of the water’s surface. Praaf! Surfacing 15 metres ahead of the boat, the exhalation was plosive and rough.

The pod of about 10 animals came to the surface. Part of the L pod of orcas, our captain said, one of three pods that form the “southern residents” in the waters of the Salish Sea between Seattle and Vancouver, often seen hunting salmon around the San Juan Islands. Others – “transients” that ply coastal waters and “offshores” that feed mostly in the Pacific – also visit regularly. The L pod continued west, heading toward the Haro Strait. Our engines purred as the U-shaped arc of boats tracked the pod, leaving open water ahead of the whales.

We dropped a hydrophone over the boat’s gunwale, its cord feeding a small speaker in a plastic casing. Whale sounds! And engine noise, lots of engine noise. Clicks, like taps on a metal can, came in squalls. These sounds are the whales’ echolocating search beams. The whales use the echoes not only to see through the murky water, but to understand how soft, taut, fast or tremulous matter is around them.

Mixed with the staccato of the whales’ clicks were whistles and high squeaks, sounds that undulate, dart, inflect up and spiral down. These whistles are the sounds of whale conviviality, given most often when the animals are socialising at close range. When the pod is more widely spaced during searches for food, the whales whistle less and communicate with bursts of shorter sound pulses. These sonic bonds not only connect the members of each pod, but distinguish the pod from others.

Today, ocean waters are a tumult of engine noise, sonar and seismic blasts. Sediments from human activities on land cloud the water. Industrial chemicals befuddle the sense of smell of aquatic animals. We are severing the sensory links that gave the world its animal diversity. Whales cannot hear the echolocating pulses that locate their prey, breeding fish cannot find one another amid the noise and turbidity, and the social connections among crustaceans are weakened as their chemical messages and sonic thrums are lost in a haze of human pollution.

Read the full story at The Guardian

NOAA Fisheries Completes 5-Year Review of Endangered Southern Resident Killer Whales

January 5, 2022 — Every 5 years, NOAA Fisheries reviews the status of species listed under the Endangered Species Act to make sure they have the protection they need. We have completed our review of endangered Southern Resident killer whales and confirm they should remain listed as endangered.

The review also underscores the work we must still do to recover this declining species. We have made important strides, including:

  • Expanding critical habitat
  • Limiting commercial and recreational Chinook salmon fishing in years of low abundance
  • Releasing more salmon from hatcheries to supplement their prey
  • Funding restoration of habitat essential to the salmon the whales depend on as prey

However, we must work with our partners to do more.

Read the full story at NOAA Fisheries

 

Feds OK plan to cut salmon fishing when needed for Northwest orcas

October 13, 2021 — Federal officials have approved a plan that calls for cutting nontribal salmon fishing along the West Coast when the fish are needed to help the Northwest’s endangered killer whales.

National Oceanic and Atmospheric Administration Fisheries adopted the plan Sept. 14 as recommended by the Pacific Fishery Management Council. It calls for restricting commercial and recreational salmon fishing when Chinook salmon numbers are especially low.

It’s one of the the first times a federal agency has restricted hunting or fishing one species to benefit a predator that relies on it.

The southern resident killer whales — the endangered orcas that spend much of their time in the waters between Washington state and British Columbia — depend heavily on depleted runs of fatty Chinook. Recent research has affirmed how important Chinook are to the whales year round, as they cruise the outer coast, and not just when they forage in Washington’s inland waters in the summertime.

Read the full story from the Associated Press

Body Condition of Endangered Killer Whales Reflects Salmon Numbers and Odds of Survival

August 19, 2021 — The following was released by NOAA Fisheries:

The body condition of endangered Southern Resident killer whales reflects changes in Chinook salmon numbers in the Fraser River and the Salish Sea. This is according to new research using aerial photogrammetry from drones to track changes in their body condition over time.

The study, titled “Survival of the Fattest: Linking body condition to prey availability and survivorship of killer whales,” also found that poor body condition makes the whales more likely to die.

The new findings published today in Ecosphere highlight the value of monitoring these endangered whales through aerial photogrammetry. This method can detect individual whales declining in condition, which can provide an early warning system that they may die.

The 74 Southern Resident orcas make up three pods known as J, K, and L. Each pod is made up of distinct social and family groups.

The research showed that the body condition of J pod whales improved when Chinook salmon abundance was higher in the Salish Sea and in Fraser River tributaries. L pod body condition improved when Chinook salmon abundance was higher in Puget Sound tributaries, although that relationship was weaker than J pod and Fraser River Chinook. K pod whales had no clear relationship to the salmon populations examined in the study. However,  whales in K pod also experienced little change in their body condition during the study period.

K and L pods spend more time foraging on the outer coast of Washington and Oregon than J pod. Their more varied diet is more challenging to relate to changes in their body condition. In contrast, J pod depends to a greater extent on Chinook salmon. Differences in body condition between the three pods reflects distinct foraging patterns, while the condition of individual whales provides insights into their health, researchers found.

Read the full release here

Critical habitat for killer whales extended south along California coast

August 12, 2021 — The administration of U.S. President Joe Biden has extended critical habitat designations for the highly endangered Southern Resident orca population, to cover nearly 16,000 square miles of Pacific waters from Washington south to Point Sur, California.

The whales currently have had critical habitat protected in the inland waters of Washington state, where the Southern orca population of just 75 animals is highly dependent on chinook salmon – stocks that themselves are in danger from habitat loss and pollution in the region.

Read the full story at Seafood Source

Critical habitat for killer whales extended south along California coast

August 6, 2021 — The Biden administration extended critical habitat designations for the highly endangered Southern Resident orca population, to cover nearly 16,000 square miles of Pacific waters from Washington south to Point Sur, Calif.

The whales currently have had critical habitat protected in the inland waters of Washington state, where the Southern orca population of just 75 animals is highly dependent on chinook salmon – stocks that themselves are in danger from habitat loss and pollution in the region.

A final order from NMFS, published in the Aug. 2 Federal Register and taking effect Sept.1, maintains the Puget Sound protected region and extends the critical habitat designation out to the 200-meter (656-foot) sea floor contour.

“This revision is based on over a decade of research that improved our knowledge of Southern Resident killer whales’ geographic range, diet, and habitat needs, including their movements up and down the West Coast,” according to a NMFS announcement.

Read the full story at National Fisherman

Higher Vessel Speeds Offset Salmon Abundance for Endangered Orcas, Reducing Chance of Catching Prey

August 4, 2021 — The following was released by NOAA Fisheries:

Increased abundance of salmon in the inland waters of the Salish Sea increased the odds of endangered Southern Resident killer whales capturing salmon as prey, but increased speeds of nearby boats did just the opposite, according to new research findings.

The research was led by NOAA Fisheries’ Northwest Fisheries Science Center. It found that the orcas descended more slowly, and took longer dives to capture prey, when nearby boats had navigational sonar switched on. The sonar from private and commercial vessels directly overlaps the main sound frequencies the whales use to hunt. This may mask the whales’ signals and force them to expend more energy to catch prey.

“That suggests that it may prolong their effort to dive in search of prey, which like all marine mammals they have to do on a breath hold—so they can stay underwater only so long,” said Marla Holt, research wildlife biologist at the Northwest Fisheries Science Center and lead author of the new research. Researchers used suction-cup tags that record whale movements and sound to track and analyze their behavior and use of sound to hunt.

Earlier research found that the faster nearby vessels traveled, the greater noise the endangered killer whales experienced. That could help explain why higher speeds of nearby vessels were associated with reduced odds of the whales capturing prey. Faster vessels might also seem more unpredictable to the whales, possibly distracting them as they close in on prey, Holt said.

“Consequences of reduced food intake include negative impacts on the whales’ ability to meet their energetic requirements to support key life functions, including growth and reproduction,” the scientists wrote in the new research paper published in the journal Marine Environmental Research.

Read the full release here

Expanded Critical Habitat Signals Much of West Coast Contributes to Recovery of Endangered Killer Whales

August 2, 2021 — The following was released by NOAA Fisheries:

Today we announced that we are expanding designated critical habitat for endangered Southern Resident killer whales. They will now include most coastal waters from Washington to Monterey Bay in California—formerly they encompassed only most of the inland waters of Washington. This designation encompasses waters where we now know that the Southern Residents hunt for salmon from West Coast Rivers and other marine species.

We appreciate the nearly 2,000 comments on our proposal to expand the designated critical habitat. The Endangered Species Act defines critical habitat as areas with “physical or biological features essential to conservation of the species” that may need special protection.

While the expansion of critical habitat recognizes that the whales forage across much of the West Coast, it is unlikely to extensively affect coastal activities, such as fishing. That is because NOAA Fisheries and the Pacific Fishery Management Council, which provides recommendations to NOAA Fisheries on fishing seasons and regulations, already consider killer whales and Chinook salmon when setting salmon harvest quotas. NOAA Fisheries is currently taking comments on a proposal from the Council to limit commercial and recreational fishing in certain areas as far south as Monterey Bay in California in years when salmon returns are expected to be low.

NOAA Fisheries completed a biological opinion on the operation of dams on the Columbia and Snake River in 2020. It considered the potential impacts on Southern Residents and their prey since they have long been known to feed on Columbia and Snake River salmon. The opinion found that hatchery salmon more than make up for any reduction in salmon numbers related to the operation of the dams.

Recent research based on the DNA signatures of West Coast salmon stocks showed that killer whales prey on salmon from a diversity of West Coast Rivers. They span as far south as the Sacramento River and north to Canada and Alaska. Recovery actions for killer whales include:

  • Release of additional hatchery fish to supplement their prey
  • Extensive habitat restoration to improve natural production of salmon in the longer term

The designation of critical habitat provides an extra layer of protection when a federal agency takes an action that could impact the critical habitat of the whales. It also sends the message that everyone on the West Coast has a role to play in supporting the whales’ recovery.

“While the Southern Residents may be best known in the Pacific Northwest, the whole West Coast can contribute to recovery of the whales and the salmon that they rely on,” said Lynne Barre, recovery coordinator for the Southern Residents. “Regardless of where they are foraging, they feed on a mix of salmon from different West Coast rivers. That means the way we all use water, the way we protect habitat, how we handle our storm runoff—it all makes a difference.”

The newly designated critical habitat includes coastal waters from 6.1 to 200 meters deep with three essential physical and biological features:

  • Water quality to support growth and development
  • Prey species of sufficient quantity, quality, and availability to support individual growth, reproduction, and development, as well as overall population growth
  • Passage conditions to allow for migration, resting, and foraging

There was one notable change from the coastal critical habitat NOAA Fisheries originally proposed in November 2019. This was changed to reduce the excluded buffer area around the excluded Quinault Range Site, which is used by the Navy for various training and testing activities in support of military readiness. The final designation also includes a biological explanation of how human-induced noise impacts the conservation value of the designated critical habitat for endangered Southern Resident killer whales.

Read the full release here

Endangered orcas get new protection from US government

August 2, 2021 — Endangered killer whales received new habitat protections from the U.S. government Friday.

The National Marine Fisheries Service finalized rules to expand the Southern Resident orca’s critical habitat from the Canadian border down to Point Sur, California, adding 15,910 square miles (41,207 square kilometers) of foraging areas, river mouths and migratory pathways.

Seattlepi.com reports that the total protected area now encompasses more than 18,000 square miles (46,620 square kilometers).

“These critically endangered orcas are finally getting the federal habitat protections they desperately need,” said Julie Teel Simmonds, an attorney at the Center for Biological Diversity.

Read the full story at the Associated Press

$8.3 Million in Funding Recommended for Coastal and Marine Habitat Restoration Projects

July 16, 2021 — The following was released by NOAA Fisheries:

NOAA is recommending nearly $8.3 million in funding to continue 23 ongoing habitat restoration projects through our Community-based Restoration Program. These projects will restore habitat for coastal and marine species in 13 states and territories and provide benefits for communities and the environment. The projects will also support coastal communities that rely on healthy habitats for benefits like clean drinking water, flood and storm protection, and industries like boating, fishing, and tourism.

By reopening rivers to fish passage, reconnecting rivers to their floodplains, and reducing coastal runoff, these projects will support oysters, corals, and several fish species. They will also aid in the recovery of four NOAA Species in the Spotlight:

Recipients and their partners include nonprofits; federal, state, and local agencies; tribes; private sector businesses; and academia.

Read the full release here