Saving Seafood

Scientists Discover Three New Viruses That Infect Endangered Salmon

September 5, 2019 — Scientists from the University of British Columbia, Fisheries and Ocean Canada, and the Pacific Salmon Foundation have discovered three new viruses that infect endangered Chinook and sockeye salmon – including one that was previously thought to only infect mammals.

These fish are considered to be ‘keystone species’ – meaning they have a disproportionately large impact on their ecosystem, making them a high priority for conservation. However, populations of both Chinook and sockeye salmon have been declining in the Pacific Northwest for the last three decades despite increased fishing regulations.

Researchers believe viruses may be part of the cause of the salmon declines. To date, most research on salmon-infecting viruses has focused on the piscine orthoreovirus, or PRV. PRV can cause ‘Heart and Skeletal Muscle Inflammation Disease’ (HSMI) in Atlantic salmon, devastating farmed stocks. However, PRV does not have the same disease-causing effect on Chinook and sockeye salmon.

Read the full story at Forbes

ALASKA: Drought and dry conditions impacting salmon across state

August 22, 2019 — This summer has been hot and dry in Alaska — so hot, in fact, that even the fish are feeling it.

All over coastal Alaska, temperatures have hovered significantly greater than normal. The state began sweltering in mid-June and crested on July 4, with Anchorage hitting 90 degrees Fahrenheit and Bethel reaching 91. The bright, sunny days brought Alaskans out to swim and recreate, but they also left the waters where salmon were returning exposed to the direct, unforgiving heat.

Shallower lakes and rivers across Southcentral and Southeast Alaska were the first to heat up. In the Matanuska-Susitna Valley, lakes like Larsen and Judd, where the Alaska Department of Fish and Game operates weirs for sockeye salmon, reached 80 degrees. The Kuskokwim River in western Alaska registered water temperatures about 10 degrees greater than normal, likely contributing to a reported salmon die-off as the fish headed upstream.

On the lower Kenai Peninsula, the Anchor River hit its warmest temperature on record on July 7: 73 degrees. It’s dropped since then to about 66.2 degrees, but the spike was troubling, said Sue Mauger, a scientist with Homer-based conservation nonprofit Cook Inletkeeper. The lack of rain has contributed to the temperature increases too.

Read the full story at the Alaska Journal of Commerce

Warm, dry weather causing abnormalities in Bristol Bay’s salmon runs

August 21, 2019 — The world’s largest sockeye fishery, Bristol Bay, Alaska, clocked its second-largest harvest ever this season, with a haul of more than 43 million fish. The big catch, combined with a robust base price – most of the fishery’s major processors have posted an initial ex-vessel buying price at USD 1.35 (EUR 1.20) per pound – should make 2019 among the most lucrative years in the fishery’s history. This season’s historic catch comes after a string of abnormally large runs, including last season’s 62.3 million salmon, the largest in Bristol Bay’s history.

But despite a string of productive runs that have surpassed forecasts, some biologists and fishermen are concerned about warm, dry weather that has pumped up water temperatures in the region.

Read the full story at Seafood Source

The water is so hot in Alaska it’s killing large numbers of salmon

August 20, 2019 — Alaska has been in the throes of an unprecedented heat wave this summer, and the heat stress is killing salmon in large numbers.

Scientists have observed die-offs of several varieties of Alaskan salmon, including sockeye, chum and pink salmon.
Stephanie Quinn-Davidson, director of the Yukon Inter-Tribal Fish Commission, told CNN she took a group of scientists on an expedition along Alaska’s Koyokuk River at the end of July, after locals alerted her to salmon die-offs on the stream.

She and the other scientists counted 850 dead unspawned salmon on that expedition, although they estimated the total was likely four to 10 times larger.

They looked for signs of lesions, parasites and infections, but came up empty. Nearly all the salmon they found had “beautiful eggs still inside them,” she said. Because the die-off coincided with the heat wave, they concluded that heat stress was the cause of the mass deaths.

Read the full story at CNN

ALASKA: Sockeye salmon continue to surge into Kenai River

July 30, 2019 — Sockeye salmon continue to pour into the Kenai River, where biologists have increased personal use fishing hours and sport bag limits to deal with the flood of fish.

On Friday, the Alaska Department of Fish and Game issued emergency orders allowing personal use fishermen more fishing time at the mouth of the river and increasing the sport limit to six fish per day downstream of Skilak Lake as the river’s escapement approached 1 million sockeye.

Nearly 100,000 fish were counted past the department’s sonar site at river mile 19 on both Saturday and Sunday, capping a week that saw more than half a million sockeye swim upriver.

As of Saturday night, dipnetting is now allowed 24 hours a day in the open area at the mouth of the Kenai River. The personal use fishery is open to Alaska residents only with a valid sportfishing license and personal use permit. The fishery runs through Wednesday.

Read the full story at the Anchorage Daily News

In hot water: How warmer years might affect salmon populations

July 29, 2019 — There is a lot of worry and speculation about hot weather affecting sockeye runs on the east side of Bristol Bay this summer. But despite some of the hottest air and water temperatures on record, every district is meeting — or exceeding — expectations, both for escapement and harvest.

As the water temperature trends continue to rise over the years, the question at the fore is how warming water will impact salmon health, and whether it shapes the runs from year to year.

Jerri Bartholomew, Director of the Aquatic Animal Health Laboratory at Oregon State University, set the baseline for a discussion on the long-term effects of heat on salmon.

“When you try and predict what’s going to happen in an ecosystem, things just get complicated,” she said.

Trying to peer into the future of Bristol Bay salmon is a bit of a shot in the dark. Without actual data, it’s a lot of guesswork: trying to find places with ecosystems similar to the bay, then extrapolating conclusions based on what we already know.

Still, there are three pressing questions when it comes to salmon in warmer waters.

The first, basic question, is how temperature affects the fish — in both the short and long term.

Read the full story at KTOO

Study on salmon ear stones cited by EPA in Pebble draft EIS comments

July 9, 2019 — On Monday, the Environmental Protection Agency released its formal comment on the draft Environmental Impact Statement for the proposed Pebble Mine.

The 100-page release pointed to a bevy of environmental studies that highlight potential harm to land, water and animals in the Bristol Bay region — consequences that the EPA claims were not fully considered in the draft EIS from the Army Corps of Engineers.

One of those studies focused on the growth and development of young salmon in a region with the largest wild sockeye run in the world.

One of the study’s co-authors, Daniel Schindler, said his findings show that the waters where young sockeye and Chinook salmon grow and develop can shift from year to year. Essentially, even rivers and streams that don’t serve as homes for young fish now, may do just that in the future.

“Certain parts of the habitat do well in some years,” Schindler said. “And other parts of the habitat do better in other years. So it’s really the intact nature of the whole Nushagak watershed that produces such reliable returns to the fishery.”

Read the full story at KTOO

ALASKA: Bristol Bay’s Salmon Flood is Rising — the Greatest Migration on Earth?

July 2, 2019 — SEAFOOD NEWS — As sockeye salmon surge past the Port Moller Test Fishery nets and catch tallies in the Bay rise as escapment numbers in the river systems accelerate even faster (after all, that is what the biologists manage for), the vast size of Bristol Bay’s salmon run is hard to grasp.

The six-week fishery, which reaches a fever pitch for about ten days, is arguably the greatest migration on earth. Because it is invisible until the last few days, it is rarely recognized. Great migrations might bring to mind vast herds of wildebeast crossing the Serengeti in Africa; those number a mere 1.5 million.

Then there’s what many now call the largest mammal migration — fruit bats from the Congo to neighboring Zambia over 90 days each fall. The size? Only 10 million.

This year’s forecasted total run of 40.18 million sockeyes is expected to net a harvest of 26.1 million salmon.

It’s difficult to find, by any measure, a likeness in the natural world of the journey Bristol Bay salmon make from one of the Bay’s five river systems to the ocean, across the Bering Sea and North Pacific Ocean in a vast loop that brings them back to the Bay to reproduce and die.

It is the reproduction part that fisheries managers focus on. Indeed, state law requires them to manage for escapement to maintain sustainability for each species and timing in each salmon river, every year.

Escapement in the Wood and Nushagak rivers of Bristol Bay is tracking well with forecasts made by the Alaska Department of Fish and Game pre-season. As of yesterday, June 30, Wood River escapement was 603,000 sockeye out of a forecasted escapement of 980,000, putting it at the 61 percent mark. In the Nushagak a cumulative escapment of 243,000 sockeye have been counted, 32 percent of the 770,000 expected.

That is good news, but even better news is when compared to last year’s escapement on that date, escapement on the Nushagak this year is higher. And remember that last year the Nushagak District salmon run broke all historic records. On July 1, 2018, ADF&G broke the news that harvest in the Nushagak reached 1.77 million sockeye, a new record. Their escapment at that time was 183,440 sockeye out of a predicted 770,000 salmon (same as this year.)

The Wood River escapement last year at this time was 1.2 million out of a prediction of 1.53 million or 78 percent acheived. The Wood River is part of the Nushagak District, and last year was a huge contributor to the record-breaking district totals.

Historically, Bristol Bay’s peak is coming at the end of this week. The latest analysis from the Port Moller Test Fishery notes “The substantial uptick in the daily index today [June 29, 2019] indicates the run will continue to build at least through July 4, and possibly beyond.

“We will need to know what the remainder of the test fishing indices look like to see how big the run may be beyond July 4 (we only predict the catch plus escapment that is between Port Moller and the inshore districts). The daily C+E will likely bounce around our current projection but should total around 8 million fish for the period June 29-July 4.”

The Port Moller team also notes that there is no indication that the run is early.

“If the run is on time, the index should begin to fall tomorrow [Sunday, June 30] and continue to do so. Sustained catch indices over the next several days would indicate a later run that is larger than the pre-season forecast.”

Egegik and Nushagak Districts have dominated the test fishery at Port Moller so far, underscoring that the run has not reach its peak at Port Moller, about 5-6 days of swim time for a salmon to the Bay.

Harvest totals in the Nushagak District, as of yesterday, were 4.1 million sockeye out of a pre-season catch forecast of 7.97 million.

On the east side of the Bay, the Egegik to date harvest of 2.1 million compares to the pre-season forecast of 7.04 million.

Bristol Bay’s total catch is 6.8 million sockeye, already more than any other area in the state. Total sockeye catches are 9.6 million fish, with 1.4 million coming from the PWS/Copper River, 1.2 million from the South Peninsula.

Total salmon landings of all species in Alaska are at 22.84 million, with chums making up 3.6 million and pinks, to date, at 9.6 million.

This story was originally published on SeafoodNews.com, a subscription site. It is reprinted with permission.

Alaska Fish and Game forecasts a 2019 salmon catch of 213.2 million fish

April 10, 2019 — Alaska fishermen could catch 85 percent more salmon this year (nearly a hundred million more) if state forecasts hold true.

That’s good news for fishermen in many Gulf of Alaska regions who in 2018 suffered some of the worst catches in 50 years.

The Alaska Department of Fish and Game is predicting a total salmon catch of 213.2 million fish for 2019, compared to about 116 million salmon last year. The increase comes from expectations of another big haul of sockeyes, increases in pinks and a possible record catch of chum salmon.

The harvest breakdown calls for 112,000 chinook salmon in areas outside of Southeast Alaska. The catch for the Southeast troll fleet, which is determined by a treaty with Canada, will be 101,300 kings, a 5,600-fish increase.

Read the full story at the Anchorage Daily News

 

Fight renewed over Pebble Mine in Bristol Bay, Alaska

April 5, 2019 — Opposition is growing to a renewed effort to launch a massive mining project near Bristol Bay, Alaska, home to the world’s largest sockeye salmon run.

Mining conglomerate Pebble Limited Partnership applied for a permit in December 2017 for an open pit copper, gold, and molybdenum mine that would sit near critical headwaters that feed the Bristol Bay fishery. Opponents say the Pebble Mine would undermine the area’s pristine habitat – a calling card of the Bristol Bay brand – and that a tailings dam failure could prove catastrophic to the fishery. The most recent public opinion poll by the BBNC shows 58 percent of Alaskans oppose the mine, with 33 percent supporting it.

The U.S. Army Corps of Engineers released a Draft Environmental Impact Statement (EIS) on 20 February, 2019, but the wide-ranging opposition in Alaska and beyond has lambasted the document.

“People around here understand on a very visceral level the importance of fisheries in general and Bristol Bay in particular. Commercial fishermen, sport fishermen, tribal entities that are interested in subsistence, biologists; we’re not always aligned, but we’re certainly aligned on this particular issue,” said Daniel Cheyenne, the vice president of lands and natural resources for the Bristol Bay Native Corporation (BBNC).

Norm Van Vactor, the CEO of the Bristol Bay Economic Development Corporation, said the EIS is incomplete.

Read the full story at Seafood Source