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Midwater Trawls and Echosounding

by | Jul 16, 2013 | Gulf of Alaska Project | 0 comments

by Wyatt Fournier
July 16, 2013


With our 3rd wire sensor installed we charged on, occupying up to 5 stations a day while also fishing mid- water trawls along the transect.  These mid-water trawls are used to verify the acoustic signal that Dave is observing on the ES60 EchoSounder.   This system is equipped with both 38 and 120Khz frequencies allowing him to differentiate between macro invertebrates and fish.  Dave has interpreted this image to be aggregations of fish forming at the bottom with a layer of krill above them.  We immediately turned around and trawled on this target to verify his observations.  To see what we caught, visit our facebook page:  www.facebook.com/GulfOfAlaskaProject

                       

http://www.nprb.org/assets/images/uploads/blog/Blog+7.16.13.jpg

WHo we are

General Info

NPRB is a marine research organization that supports pressing fishery management issues or marine ecosystem needs.

Reports & Publications

More than 600 peer-reviewed publications have been produced through NPRB-funded research. Browse our reports here.

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A 20 member Board, representing Federal, State, and other entitites receiving advice from Science and Advisory Panels.

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Looking to partner? NPRB welcomes partnerships to co-fund research in areas of common interest and across its programs.

Outreach & Engagement

NPRB engages with a broad and diverse set of Alaskan stakeholders and audiences, from coastal communities to academia.

Staff

Supporting the Board, Science, and Advisory Panels for funding decisions, science priorities, recommendations, and program management.

Funding Available

Access all of our new and active funding opportunities available in our research programs.

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NPRB staff begins developing draft research priorities for the Core Program in late July and August. Submit before July 2nd to be considered for the current year’s RFP development. 

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INTEGRATED ECOSYSTEM PROGRAMS

Science Foundation

Research programs addressing pressing fishery management issues and Alaska marine ecosystem information needs.

Integrated Ecosystem Research

These are large-scale interdisciplinary ecosystem-based programs, requiring multiple agency coordination, collaboration, and investigation.

Outreach Program

Science communication, engagement, outreach, and education initiatives for NPRB programs.

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Program

A competitive, peer-reviewed annual request for proposal (RFP) process dedicated to Alaska marine research.

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Awards

Supporting next generation scientists, researchers, and resource managers to further studies in marine science and to our mission.

Long-Term Monitoring

These are new or existing time-series projects that enhance the ability to understand the current state of marine ecosystems.

Examining how physical changes in the ocean influenced the flow of energy through the marine food web in the Bering Strait, Chukchi Sea, and western Beaufort Sea.

Studying the survival and recruitment of five focal groundfish species (Pacific cod, Pacific ocean perch, walleye pollock, arrowtooth flounder, sablefish) during their first year of life.

Understanding the impacts of climate change and dynamic sea ice cover on the eastern Bering Sea ecosystem in partnership with the National Science Foundation.

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Bering Sea

COMING SOON! Focusing on the northern Bering Sea and will include consideration of upstream and downstream ecosystems in the southeastern Bering Sea, western Bering Sea, and Chukchi Sea.

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