HOME >> BIOLOGY >> NEWS
Alaska Scientists Say Salmon Declines Inevitable

FAIRBANKS, Alaska--For two straight years, returns of sockeye salmon to Bristol Bay, the world's largest wild red salmon fishery, have been below state forecasts. Salmon returns to the Kenai Peninsula, the Yukon-Kuskokwim River and elsewhere in Alaska also have fallen short of expectations.

The declines come as a shock to fishermen and policy makers, but not to some scientists who study the North Pacific Ocean. Their studies of year-to-year and long-term changes in the ocean suggest the salmon declines are in part the result of natural ocean cycles.

"It was bound to happen," says Milo Adkison, an assistant professor of fisheries at the University of Alaska Fairbanks School of Fisheries and Ocean Sciences. "You get large year-to-year variations and you also get shifts in salmon abundance that can run for a couple of decades. Salmon productivity itself is connected to conditions in the ocean that operate on similar time scales."

Adkison says research being done at the University of Alaska Fairbanks suggests the changes in fish and shellfish abundance, called regime shifts, occur about every 20 years. It's been about that long since Alaska's salmon stocks rebounded from historic lows. Adkison says a regime shift might be under way, but it's still too early to tell.

"Because there is such a large interannual variability, you have a hard time knowing that you're in a new regime until you've seen five years of bad returns in a row or five years of good returns in a row," says Adkison.

UAF assistant professor of oceanography Tom Weingartner also isn't ready to say a regime shift is under way, but he has noticed dramatic changes in the ocean.

"Certainly over the last year we have been influenced by El Nino," says Weingartner. "Whether or not that is occurring in conjunction with a regime shift, I don't know. Our Canadian colleagues noticed in the Gulf of Alaska that nutrients necessary for phytoplankton production were depleted from the surface lay
'"/>

Contact: Doug Schneider
fndgs@uaf.edu
907-474-7449
University of Alaska Fairbanks/NOAA Sea Grant Program
8-Aug-1998


Page: 1 2 3

Related biology news :

1. Alaska scientists find Arctic tundra yields surprising carbon loss
2. UAF scientists discover new marine habitat in Alaska
3. Climate change could doom Alaskas tundra
4. Chronic respiratory symptoms prevalent among Alaska natives
5. Spruce bark beetle outbreaks examined at Alaska Symposium
6. Alaska oil and gas exploration good and bad for area life
7. Alaskan waters growing hospitable to sharks while seals and sea lions decline
8. NSF-funded researchers track Alaska seal migration for the first time
9. Betting on climate change: Alaskan gambling contest yields treasure trove of scientific data
10. Warmer periods in Alaskan area not confined to modern times
11. From July 21-Aug. 20, Smith College and collaborators to retrace historic Harriman Expedition to Alaska

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/8/2019)... ... January 07, 2019 , ... ... solutions, is proud to welcome Thomas Kennedy as head of sales and business ... for PureWay. , Mr. Kennedy has previously worked for Johnson & Johnson Medical, ...
(Date:1/4/2019)... ... January 02, 2019 , ... Lifecycle Biotechnologies ... the life science tools and service supplier turned 40 in 2018 and for ... catalog features not just part numbers like most catalogs, but rather, insightful information ...
(Date:12/25/2018)... ... 2018 , ... Researchers at the Icahn School of Medicine ... a long-standing computational concept known as “blacklisting,” which is commonly employed as a ... as a filter to single out genetic variations in patient genomes and exomes ...
Breaking Biology News(10 mins):
(Date:1/8/2019)... ... January 08, 2019 , ... The American Society of ... were named by a selection committee made up of industry leaders identified by the ... Development grants are mentored awards created to support ASGCT members designing transformative pilot studies ...
(Date:1/4/2019)... (PRWEB) , ... January 01, 2019 , ... ... first Microbiome Conference at the World Economic Forum Annual Meeting January 22-25, 2019 ... conference is invitation-only. , The World Economic Forum Annual Meeting brings together leaders ...
(Date:12/20/2018)... ... ... New Year’s brings reflection and desire to improve for individuals and businesses ... on the horizon, Jim Kasic, president and CEO of Boulder iQ, suggests five resolutions ... Regulation (MDR), digital health, and big data are just a few of the challenges ...
(Date:12/18/2018)... ... December 17, 2018 , ... ABCT , ... biosciences ventures invited to participate in the annual program. Twelve ventures will participate ... and a professional network. All startups receive an entrepreneur coach, access to active ...
Breaking Biology Technology:
Cached News: