Posted on Categories Climate Change & Energy, Sonoma Coast, WildlifeTags , , ,

Why were whales increasingly caught in crab lines? Because of the climate crisis

Katharine Gammon, THE GUARDIAN

New study shows marine heat wave was causing marine life to cluster in an area that made feeding dangerous

When humpback whales began to appear in large numbers off the California coast in 2015 and 2016, people celebrated the comeback of the whales after a near-miss with extinction.

However, the excitement was quickly met with new worries – the whales increasingly got caught up in fishermen’s crab ropes. By 2016, there were more than 50 recorded entanglements that left whales injured or killed. Whales got ropes tangled around their mouths, making it difficult for them to eat. Crab lines cut through tissue and caused infections.

Although whales and fishing had coexisted for decades, this was a new problem. So what was driving it?

A new study published in the journal Nature Communications points at climate breakdown as a factor in the mass entanglements.

When the situation was unfolding in 2015 and 2016, it surprised most people, but not Jarrod Santora, an ecologist at the University of California, Santa Cruz and the lead author of the paper.

Santora was studying the ecosystem effects of the marine heat wave, known as “the blob”, that was happening off the coast of California at the time. Heat waves alter the ocean’s upwelling – the process in which deep, cold, nutrient-rich water rises to the surface. The upwelling in 2015 and 2016 shrunk to just a narrow band along the coast, causing organisms to cluster there. Due to a heatwave-related decline in krill, whales switched to feeding on anchovies in shallower and shallower waters. In addition, the crab fishing season – an $88m industry on the US west coast – had been delayed from November to April, and came to coincide with the whales’ presence.

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Posted on Categories Agriculture/Food System, WildlifeTags , , , ,

Crab harvest is not only light, but late

Tyler Silvy, THE PRESS DEMOCRAT

The rush to renew a North Coast New Year’s tradition — feasting on freshly caught Dungeness crab — may help ease the pinch of a late start to the season for fishermen and retailers, but mediocre early returns have so far added a little lemon juice to the cut endured this year by the fleet.

“I won’t say it’s poor,” said Bodega Bay fisherman Dick Ogg, before offering a laugh. “I’ll say it’s less than good. It’s not exactly what we had expected. Our original anticipation was that there were a fair quantity of crabs in the area. Unfortunately, that is not the case.”

The prediction of a mountain of Dungeness crab lying in wait at the bottom of the Pacific Ocean prompted a number of fishing boats from outside the area to descend this month on Bodega Bay.

They had time, as the season was delayed a month until Dec. 15 to allow endangered humpback whales time to clear the area and head south to their winter home off the coast of Mexico.

Ogg, the vice president of Bodega Bay Fisherman’s Marketing Association, said the added pressure didn’t help matters, but it ultimately comes down to this: There just aren’t as many crabs as predicted. And at this point, Ogg said, “the majority have been caught.”

Read more at https://www.pressdemocrat.com/business/10528717-181/north-coast-tradition-renewed-as

Posted on Categories Sonoma Coast, WildlifeTags , ,

Dozens of West Coast gray whale deaths prompt federal investigation

Guy Kovner, THE PRESS DEMOCRAT

Prompted by the fatal stranding of 70 gray whales on the U.S. West Coast this year, federal scientists have launched a major scientific investigation aimed at identifying the cause or causes of the die-off among the migrating mammals that number about 27,000 and are a popular North Coast attraction in places like Bodega Bay.

A young gray whale that washed up last week on Limantour Beach at Point Reyes National Seashore was the 15th recorded stranding in the greater Bay Area.

An additional 78 strandings have occurred in Mexico and Canada, bringing the five-month total to 148 deaths of Eastern North Pacific gray whales.

NOAA Fisheries, the federal agency charged with protection and conservation of marine mammals, said the trend warranted declaration of an “unusual mortality event,” unleashing funding and resources for an investigation that could take months or years to find answers.

Deborah Fauquier, a NOAA veterinary medical officer, said Friday the declaration was justified by an unexpected and significant die-off that “demands an immediate response.”

An investigative team of experts from the United States, Canada, Mexico and possibly worldwide will be formed to “determine what might be causing the die-off, such as environmental conditions, disease or human activities” and “make informed decisions to protect this important marine species,” she said in a teleconference with reporters.

Read more at https://www.pressdemocrat.com/news/9655458-181/dozens-of-west-coast-gray

Posted on Categories Agriculture/Food System, Habitats, Sonoma Coast, WildlifeTags , , ,

Shorter season imposed on California’s Dungeness crab fleet to safeguard whales

Mary Callahan, THE PRESS DEMOCRAT

California’s commercial crabbing fleet will be fishing significantly shorter seasons going forward and with greater safeguards in place to avoid ensnaring endangered marine life in potentially deadly gear under a legal settlement announced Tuesday.

The deal, reached between state regulators, environmentalists and representatives of the crab fleet, is meant especially to protect whales, some of them endangered, that feed in abundance during the spring off the Central and North Coast.

The framework unveiled Tuesday will cut the current season and future seasons by as much as 2½ months and mandate a near-constant watch on the entanglement risks posed to sealife. If those risks are too high, regulators could trigger mid-season closures of some areas.

“It’s been my view almost always we can do right by our natural resources and do right by Californians, and do it better together than in a courtroom,” state Fish and Wildlife Director Chuck Bonham said during a media call on the settlement.

Other parties to the deal included the Center for Biological Diversity, which sued the state in 2017 over a sharp rise in the number of whale entanglements, and the Pacific Coast Federation of Fishermen’s Associations.

To a large extent, the complex settlement reinforces and formalizes efforts already being developed by wildlife regulators and partners to ensure that imperiled wildlife and the crab fishery can thrive.

State Sen. Mike McGuire, whose North Coast district accounts for most of the state’s crab catch, one of California’s most lucrative fisheries, said the cooperation was a sign of the “extremely proactive” posture the state has adopted “to ensure California’s majestic whale population and our crabbing fleet can co-exist.”

Read more at https://www.pressdemocrat.com/news/9433839-181/shorter-season-imposed-on-californias

Posted on Categories Sonoma Coast, WildlifeTags , , ,

Environmental group sues California over whale-killing gear 

Olga R. Rodriguez, ASSOCIATED PRESS
An environmental group sued the state of California on Tuesday for allegedly not doing enough to keep Dungeness crab fishery gear from killing protected whales.
The Center for Biological Diversity filed its lawsuit in federal court in San Francisco, saying the California Department of Fish and Wildlife is liable for a surge in entanglements of endangered whales and sea turtles because it authorizes and manages operation of the fishery.
California should put in place more mandatory protection measures, such as blocking fishing operations from especially important waters for whales, restricting the amount of gear in whale hotspots and reducing the amount of rope running through the water, the center said.
Read more at: Environmental group sues California over whale-killing gear | The Tribune

Posted on Categories Sonoma Coast, WildlifeTags ,

Tail end of gray whale migration happening off Sonoma, Mendocino coasts in April, May, June

Jeanne A. Jackson, THE PRESS DEMOCRAT
Just off our coastline, more than 20,000 gray whales travel thousands of miles on their great migration. In autumn, they begin their journey from their feeding grounds in the Arctic Circle to their birthing, mating and nursery waters in the lagoons off Baja California. It’s a trip of five to seven thousand miles, one-way. And the whales do not eat until they return to the Arctic in the spring.
The first to leave the Arctic are the pregnant females. They are followed by those gray whales who will be mating. Those whales not mature enough to mate, will then follow, though some will linger off the coast.
While in the warm waters off Baja, mother whales give birth to their calves. Each mother whale births one calf. The mothers and calves will stay in the lagoons for the calves to gain enough strength to swim the thousands of miles north. The mothers will feed their calves with their rich, calorie-dense milk. They nurse their babies as human mothers nurse their young. Gray whale bodies have many similarities to human bodies.
The first whales to leave Baja and head north in late winter are the newly pregnant females. They swim fast and hard, as they need to reach their feeding ground where they will be eating for two.
The last to leave Baja are the mother/calf pairs, and that is what is occurring now. April, May and early June are the perfect times to whale watch, as the mother/calf pairs are closer to shore due to the current, and the whales come up more often for their offspring to breathe.
Read more at: Tail end of gray whale migration happening off Sonoma, Mendocino coasts in April, May, June | The Press Democrat

Posted on Categories WildlifeTags , ,

Unusual number of whales seen in San Francisco Bay

Associated Press
Migrating humpback whales have been swimming into San Francisco Bay in unprecedented numbers during the past two weeks — an onslaught that experts say could be caused by an unusual concentration of anchovies near shore.
As many as four humpbacks at a time have been spotted flapping their tails and breaching in bay waters, apparently feeding on the anchovies and other schooling fish during incoming tides, the San Francisco Chronicle reported Thursday.
It’s normal for gray whales to wander into the bay, but humpbacks generally feed farther offshore and are not accustomed to navigating shallow water and narrow straits such as those in San Francisco Bay, the newspaper reported.
Read more at: Unusual number of whales seen in San Francisco Bay – SFGate

Posted on Categories Sonoma Coast, WildlifeTags , ,

To save whales, Sen. McGuire promotes program to recover entangling crabbing gear

Mary Callahan, THE PRESS DEMOCRAT
The rising number of whales that become entangled in lost or abandoned crab pots off the western United States has spurred a new state bill aimed at ensuring hundreds, even thousands of crab traps that are left behind each year get recovered from the ocean.
Authored by state Sen. Mike McGuire, D-Healdsburg, the Whale Protection and Gear Retrieval Act would establish a fee-based regulatory system under which commercial crabbers could be paid to recover lost gear from the water, while owners would pay to reclaim it — or risk losing their crab permit — ensuring funding of the program for the coming year.
The system is modeled after a pilot program that has resulted in collection of about 1,000 crab pots and attached ropes over the past two years from coastal waters between Half Moon Bay and the Oregon border, McGuire said, though many of the details would be worked out at a later date.It was the commercial industry, through representatives on the California Dungeness Crab Task Force, that moved to make the program permanent, McGuire and others said.
“It’s basic accountability, is what it is: Take care of your equipment,” said Bodega Bay fisherman Dick Ogg, who took part in the pilot program this year, retrieving dozens of pots from the shoreline of the North Coast.
Read more at: To save whales, Sen. McGuire promotes program to recover entangling crabbing gear | The Press Democrat

Posted on Categories Sonoma Coast, WildlifeTags , ,

Recording project seeks to help marine wildlife in Cordell Bank sanctuary avoid harmful noise

Mary Callahan, THE PRESS DEMOCRAT

To listen to recordings of whale songs, click here and here.

Motoring across the steel-gray surface of the Pacific Ocean on a scientific vessel loaded with high-tech equipment — the vast horizon stretching ahead and seabirds soaring above — it is still nearly impossible to picture the diverse and abundant life that hides beneath the waves.
But occasionally, you get a glimpse.
A humpback whale breaches off the bow. Three sea lions mingle in a group before diving in unison. A pod of 100 or more dolphins puts on an acrobatic show, its members leaping above the surface two or three at a time.

What sounds do such marine mammals hear, and how loud is it in their underwater world?

Those are the questions driving scientist Danielle Lipski and her colleagues, who were on a daylong voyage Thursday out of Bodega Bay on a 67-foot ship — Research Vessel Fulmar — to deploy what amounts to a large listening device meant to record the ocean’s sounds.

Marine zoologists are increasingly worried that an ever-louder ocean — traversed by fishing vessels, shipping traffic and military craft — might interfere with the songs and vocalizations that whales and other marine mammals use to communicate about food sources, migratory routes, reproductive availability and other critical functions.

Read more at: Recording project seeks to help marine wildlife in | The Press Democrat

Posted on Categories Sonoma Coast, WildlifeTags , , , Leave a comment on Whale mystery

Whale mystery

Kathleen Willett, NORTH BAY BOHEMIAN
Walking Sonoma and Marin county beaches recently has yielded some unusual sights and smells.
According to officials at the National Oceanic and Atmospheric Administration (NOAA), 12 dead whales have washed up on Northern California beaches in the last three months, including two along the Sonoma County coast and one in Marin County. The carcass of a young gray whale showed up on Portuguese Beach on May 23, with another gray whale washing ashore near Jenner around May 28. In Marin, a headless whale came ashore on South Beach along the Point Reyes National Seashore on May 26.
Other than the fact that they are all whales, what do the carcasses share in common?
“There is no unifying factor,” says Mary Jane Schramm, spokeswoman for the Gulf of the Farallones National Marine Sanctuary.
Marine scientists have identified four species among the dozen dead whales: orca, humpback, sperm and gray, which are commonly seen heading north along the coast this time of year. Their ages, along with their causes of death, have varied.
According to Schramm, one of the dead whales found in Pacifica was mature and possibly died of “old age,” given the condition and apparent wear on various body parts. Several others were young, possibly calves from the winter birthing season in Mexico, and may have been victims of predation by orcas.
One humpback was a victim of shipping traffic, while other whale carcasses have shown signs of possible “fishery interactions” such as net entanglements, which can mortally wound the immense animals.
In a typical year, one or two gray whale carcasses wash ashore. So what is different this year?
Read more at: Whale Mystery | News | North Bay Bohemian