Groups in Connecticut are preparing to celebrate World Fish Migration Day on Friday.

The biennial event celebrates migratory fish species and their importance. It also highlights challenges these species face, such as climate change. Warming waters make it harder for them to survive.

Rhea Drozdenko, a river steward with the Connecticut River Conservancy, noted that planting trees on river banks can reduce water temperatures. She said dams also pose a challenge for fish.

"They are essentially blocking off a river," she said, "so fish that might have historically been able to go far north, up through our watershed, now that there's dams there, they are now blocked. And so, now they have smaller and smaller habitats at their disposal."

She said conservation groups advocate for safer passage with fish ladders and fish elevators at the dams. Another way is removing so-called "deadbeat dams" that no longer serve an economic use and impede fish migration.

More information about events and getting involved is online at worldfishmigrationday.com.

Habitat neglect is another problem for migratory fish species. Steve Gephard, a Connecticut River Salmon Association board member, said he has found that if the habitat isn't suitable, migratory fish won't prosper. He said work is being done to restore important habitat areas.

"In some cases, it means putting rocks back in, putting woody debris back in, revegetating the flood plain, putting some curvature in the stream," he said. "A lot of streams, as they've gone through human areas, have been channelized."

Some habitats get degraded through industrialization and by clear-cutting forests. Data show hundreds of miles of fish passageway reopened between 1999 and 2018. If pathways for fish migration open up by removing dams, Gephard said, environmental groups have to ensure healthy habitat is there for these fish to return to.

The public comment period is now open on California's new framework for deciding which managed areas within coastal waters meet the definition of "conserved," and where protection improvements need to be made.

California's goal is to preserve 30% of state lands and waters by 2030. The Ocean Protection Council released science-based guidelines this week on what counts as "conserved."

"An area is considered a conservation area if the lands and coastal waters are durably protected and managed to sustain functional ecosystems, both intact and restored, and the diversity of life that they support," said Jos Hill, project director at the Pew Charitable Trusts.

People can weigh in on the process at a series of upcoming workshops in Arcata, Monterey and San Diego. The Ocean Protection Council will also hold two webinars this summer and will accept feedback by email.

Hill said the new framework will be used by the state to evaluate protections in marine-managed areas. The state's "30-by-30" policy sets goals to improve biodiversity, public access and climate resilience.

"The stakes of failing to protect nature are high, and the loss of biodiversity undermines the ability of ecosystems to function and support a healthy environment," Hill said. "And this is particularly important in a changing climate, in which loss of biodiversity reduces nature's resilience to change."

The evaluation criteria will be finalized in the fall and the preliminary decision on which places qualify as conservation areas will be presented in December.

Support for this reporting was provided by The Pew Charitable Trusts.

New England fishermen and environmental groups are working to prevent the growth of industrial-size fish farms in U.S. open waters.

They said federal legislation known as the "AQUAA Act" would permit so-called "floating feedlots" similar to land-based dairy and poultry farms, known to use heavy amounts of pesticides and antibiotics.

James Mitchell, legislative director for the advocacy group Don't Cage Our Oceans, said there is no way to contain the chemicals or tons of untreated fish waste created.

"In fact, the whole reason for it is to rely on Mother Nature for its ecosystem services, to wash away the pollutants from the fish themselves so that they don't go belly up," Mitchell pointed out.

Backers of large-scale aquaculture argued it is needed to feed the world but studies show such farms often produce fewer fish than the number of wild fish taken from the ocean to make fish food.

Maine's abundant coastline and history of working waterfronts make it an ideal place for an aquaculture business, and numerous small-scale shellfish and marine plant farms are boosting local economies. But commercial fishermen say the growth of large, foreign-owned fish farms endangers both the ocean and their livelihoods.

Jason Jarvis, commercial fisherman and board president of the North American Marine Alliance, said aquaculture should be locally owned and low-impact.

"I think if we had multiple, small-scale aquaponics systems -- compared to large, industrial-size aquaculture -- I mean, it's a big difference in who benefits and how you benefit," Jarvis explained.

Jarvis noted it is the small- and medium-scale fishermen feeding their communities who keep working waterfronts alive. He added there is no guarantee in the AQUAA Act farm-raised fish would stay in the U.S., which already imports more than 90% of the seafood it consumes.

A working group convened by the California Department of Fish and Wildlife meets today to consider a partial closure of the commercial Dungeness crab fishing season, amid concerns too many whales and sea turtles are getting tangled up in the crab gear.

The ropes, which run from crab traps on the seafloor up to a buoy on the surface can become twisted around an animal's body. Last year, the gear entangled at least five humpback whales and killed a critically endangered Pacific leatherback sea turtle.

Andrea Treece, senior attorney for Earthjustice, a nonprofit public-interest environmental law organization, detailed the concerns.

"We leave too much gear on the water too late in the season, we wait until the risk is elevated," Treece pointed out. "Too often, it's too late to protect those whales. And so we need to really learn our lesson from the past."

The danger is greatest in the spring, summer and fall, when humpback whales migrate to California from Mexico and South America. The Department of Fish and Wildlife's risk assessment team is recommending the commercial fishery close April 5 south of the Sonoma/Mendocino County line, and would restrict the depth at which the crab traps can be set in northern California waters.

Treece thinks the department should announce a statewide closure as soon as possible, as it will take weeks to retrieve the gear and whales can quickly move north into areas with a lot of gear still in the water. She added a new type of ropeless gear is being tested, which could make a big difference once it is approved for use.

"We could be looking at a future where this fishery has to operate between January and March," Treece noted. "With a thoughtful transition to ropeless gear, we could be looking at a future where the fishery is operating for its full season."

A new public service announcement from the nonprofit Oceana includes video of a humpback whale filmed in 2022, entangled in ropes. The whale swam more than 1,000 miles, dragging the discarded crab gear for a year before it was discovered.


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