Welcome to FIS   Sponsored By
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us
   


Chinook salmon. (Photo: NOAA)

2015’s ocean conditions may cause poor juvenile chinook salmon return

Click on the flag for more information about United States UNITED STATES
Tuesday, March 21, 2017, 01:50 (GMT + 9)

Researchers from Oregon State University (OSU) and the National Oceanic and Atmospheric Administration (NOAA) forecast this year there will be a slightly below-average run of spring chinook salmon on the Columbia River.

These predictions are based on the fact that ocean conditions were historically bad in the spring of 2015, when migrating yearling fish that will comprise the bulk of this spring’s adult chinook salmon run first went out to sea.

Besides, Pacific Decadal Oscillation values – which reflect warm and cold sea surface temperatures – suggest it was one of the warmest nearshore oceans encountered by migrating chinook salmon dating back to at least 1900.

Researchers believe that the lack of food for the salmon in 2015 may have resulted in significant mortality that will show in this year’s run of Columbia River springers.

“When juvenile salmon first enter the ocean, it is a critical time for them. They are adjusting to a saltwater environment, they have to eat to survive, and they have to avoid becoming prey themselves. When we sampled juvenile salmon in May and June of 2015, the fish were much smaller and thinner than usual, and many of them had empty stomachs. There just wasn’t anything for them to eat,” pointed out lead author Elizabeth Daly, a senior faculty research assistant with the Cooperative Institute for Marine Resource Studies, jointly operated by OSU and NOAA out of the Hatfield Marine Science Center in Newport.

The researcher explained that when the oceanic waters off Oregon and Washington are cold, young salmon primarily feed on readily available fish prey such as Pacific sand lance and smelts, which triggers their growth spurt. When waters are warmer, there is less food available, and they primarily eat juvenile anchovies and rockfish, which are less-desirable prey than cold-water species.

By the time the juvenile chinook salmon migrated to the ocean in spring in 2015, the larval anchovies and rockfish had all but disappeared – making even backup food sources for the salmon scarce.

The researchers theorize that these larval fish died off because they themselves had little to eat. Long-time NOAA biologist Bill Peterson told Daly and her colleagues that the Pacific Ocean off the Northwest coast in early 2015 was devoid of cold-water, lipid-rich copepods, a key element in the food chain. In 2015, it was so warm offshore that virtually no lipid-rich copepods were to be found.

“During warm years, there is typically less upwelling that brings cold, nutrient-rich water to the surface,” said Richard Brodeur, a biologist with the NOAA Northwest Fisheries Science Center and co-author on the study. “Salmon populations may be able to handle one year of warm temperatures and sparse food. But two or three years in a row could be disastrous.”

“For the first time, we found that the salmon were eating juvenile sardines in 2016 – a new prey for them,” Daly noted. “Sardines were spawning off the central Oregon coast for one of the first times because of the warm water. We don’t know the long-term impact this will have on salmon. Hopefully, it can become a new food source for them if waters remain warm.”

As this year’s run of spring chinook salmon unfolds on the Columbia River, Daly and her colleagues will be watching to see if the numbers of adult fish returning align with predictions of a poor return based on 2015 ocean conditions, prey availability, and juvenile fish size.


[email protected]
www.fis.com

Photo Courtesy of FIS Member  National Oceanic and Atmospheric Administration NOAA/NMFS
 Print


Click to know how to advertise in FIS
MORE NEWS
United States
Feb 24, 02:50 (GMT + 9):
Maine will house modern RAS farm to raise Atlantic salmon
Chile
Feb 24, 02:30 (GMT + 9):
AquaChile plans capital increase and to be listed on Oslo Stock Exchange
Nigeria
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Nigeria’s fish deficit hits 2.2m tons
United States
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Genetic tools complement the visual identification of endangered fish
Australia
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Experts divided on fish oil capsules
Australia
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Fish farmer Huon Aquaculture reports strong half
China
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Norwegian salmon exports to China fell on February 2018
Norway
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Marine Harvest ASA: Ex-dividend NOK 2.60 February 23rd 2018
United States
Feb 24, 02:00 (GMT + 9):
IN BRIEF - Salmon plan could reinvigorate US industry
Spain
Feb 24, 01:50 (GMT + 9):
Survey begins to evaluate fishing resources in Gulf of Cádiz
Worldwide
Feb 24, 01:50 (GMT + 9):
Comprehensive study uses technology to assess extent of global fishing
Peru
Feb 24, 01:00 (GMT + 9):
New laboratory will guarantee quality and safety of fish products for export
Seychelles
Feb 23, 23:40 (GMT + 9):
Seychelles announces creation of two new marine protected areas
Russian Federation
Feb 23, 23:00 (GMT + 9):
Red Crab King fishery achieves MSC certification
South Korea
Feb 23, 22:50 (GMT + 9):
South Korea will appeal WTO decision on Japanese seafood import ban



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Nine more stocks than in 2017 are now fished at sustainable levels
European Union Fishing businesses in the Atlantic, North Sea and Baltic Sea are enjoying a record on profits, due to a solid recovery of popular fish stocks which were severely depleted some years ago, claims the European Commission.
Fisheries sector registers important advance in January, thanks to anchovy
Peru The Ministry of Production announced that the fisheries sector registered an important advance in January this year, thanks to the good anchovy catches obtained during the second fishing season in the north-central zone of the Peruvian coast.
EUR 17 million allocated to support innovation in fisheries and aquaculture sector
Spain The Ministry of Environment and Rural and Marine Affairs and the Center for Industrial Technological Development presented a line of support for innovation for the fisheries and aquaculture sector, under the EMFF.
Thai Union registers record sales in 2017
Thailand Thai Union Group announced around 15 percent rise in 2017 net profit, derived from strong sales, higher income from restaurant chain Red Lobster, and better cost management.
 
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods Inc. -Headquarter-
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO -Food and Agriculture Organization- Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
Marine Harvest ASA - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
Morpol ASA - Group Headquarters
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2018 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER