Navigation Links
Unfavorable ocean conditions likely cause of low 2007 salmon returns along West Coast
Date:3/3/2008

NOAA scientists are reviewing unusual environmental conditions in the Pacific Ocean as the likely culprit for the dramatically low returns of Chinook and coho salmon to rivers and streams along the West Coast of the United States in 2007.

Researchers from NOAAs Northwest and Southwest Fisheries Science Centers are comparing data on the low food production of the California Current in 2005 that occurred when this years returning salmon would have been entering the ocean from their natal streams to feed and grow.

The cold waters of the California Current flow southward from the northern Pacific along the West Coast and are associated with upwelling, an ocean condition caused by winds that bring nutrients to the oceans surface and is the main source of nourishment for the oceans food web. In 2005 a southward shift in the jet stream, delayed favorable winds and upwelling for the California Current, which normally begins in spring. The winds instead arrived in mid-July, causing high surface water temperatures and very low nutrient production within the nearshore marine ecosystem.

We are not dismissing other potential causes for this years low salmon returns, said Usha Varanasi, NOAA Fisheries Service Science Center Director for the Northwest Region. But the widespread pattern of low returns along the West Coast for two species of salmon indicates an environmental anomaly occurred in the California Current in 2005.

Data released Thursday by the Pacific Fisheries Management Council indicate the 2007 returns of fall Chinook salmon to the Sacramento River in Californias Central Valley were approximately 33 percent of what fishery biologists expected. Projections for 2008 are substantially lower than last years estimate. [http://www.pcouncil.org/newsreleases/Feb_2008_Sacramento_News_Release.pdf]

Coho salmon returning to spawning streams in California and Oregon are also considerably lower than predicted. A preliminary analysis found an average 27 percent of the parental stock returning in 12 streams monitored in California. Even though coho returns appear to improve along the coast from south to north, Oregon Coast coho salmon had less than 30 percent of their parental stock return.

Coho salmon are listed as either endangered or threatened under the Endangered Species Act in the Central/Northern California and Southern Oregon watersheds.


'/>"/>

Contact: Jim Milbury
jim.milbury@noaa.gov
562-980-4006
NOAA National Marine Fisheries Service
Source:Eurekalert

Related biology news :

1. 2008 Ocean Sciences Meeting -- media advisory 2
2. Voyage to Southern Ocean aims to study air-sea fluxes of greenhouse gases
3. Climate change has major impact on oceans
4. Oceans fiercest predators now vulnerable to extinction
5. Valuing ocean services in the Gulf of Maine -- New approaches for conflict resolution
6. Map is first to track global human influences on ocean ecosystems
7. First map of threats to marine ecosystems shows all the worlds oceans are affected
8. Worlds largest marine protected area created in Pacific Ocean
9. Scientists expand understanding of how river carbon impacts the Arctic Ocean
10. Coral reefs may be protected by natural ocean thermostat
11. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... ARMONK, N.Y. and ITHACA, N.Y. ... IBM ) and Cornell University, a leader in dairy ... combined with bioinformatics designed to help reduce the chances ... breaches. With the onset of this dairy project, Cornell ... the Consortium for Sequencing the Food Supply Chain, a ...
(Date:5/23/2017)... Italy , May 23, 2017  Hunova, the first robotic gym ... trunk, has been officially launched in Genoa, Italy . ... Europe and the USA . The technology ... on the market by the IIT spin-off Movendo Technology thanks to a ... the Multimedia News Release, please click: ...
(Date:5/16/2017)...   Bridge Patient Portal , an enterprise ... EMR Systems , an electronic medical record solutions ... established a partnership to build an interface between ... Centricity™ products, including Centricity Practice Solution (CPS), Centricity ... new integrations will allow healthcare delivery networks using ...
Breaking Biology News(10 mins):
(Date:7/20/2017)... ... ... Dr. Asher Kimchi, Founder and Chairman of the International Academy of ... 22nd World Congress on Heart Disease held in Vancouver, BC, Canada. In addition to ... Awards. , Dr. Asher Kimchi, together with Co-Chairmen Dr. John A. Elefteriades and Dr. ...
(Date:7/20/2017)... , ... July 20, 2017 , ... Corporate Directors Forum ... its 27th annual Director of the Year Awards. , The awards will be presented ... This annual event celebrates directors who have made significantly positive contributions in the ...
(Date:7/18/2017)... ... 18, 2017 , ... G-CON today announced that it has ... its Patent Applications 14/858,857 and 13/669,785 both entitled Modular, Self-Contained, Mobile Clean Room. ... the protection of G-CON’s R&D investments and validate the G-CON platform as a ...
(Date:7/17/2017)... ... ... The Academy of Model Aeronautics (AMA) will host Aviation Adventure Day on ... from 9 a.m. to 2 p.m. at the International Aeromodeling Center in Muncie, Indiana. ... Day will be packed with entertaining activities for the entire family. Attendees will learn ...
Breaking Biology Technology: