Northwest Fisheries Science Center

The Main Deck

Acoustic and trawl adventures in the Northeast Pacific

This portal tracks the research and sea-going activities of the Fisheries Engineering and Acoustic Technologies (FEAT) Team from NOAA¿s Northwest Fisheries Science Center.  Follow us as we use acoustics, trawling, and oceanographic sampling to learn about the Northeast Pacific Ocean.

Back deck of Bell M. Shimada
Acoustic echogram of hake
trawl catch


By Sandy Parker-Stetter, NWFSC
January 13, 2017

We are officially underway and will soon put gear in the water, make sure everything works, and then start our operations.

Our goals for the 2017 Winter Hake Survey are to:
(1) Characterize the winter distribution of Pacific hake, hake aggregations, and the fish within those aggregations, to support evaluation of the feasibility/design of a potential future winter hake biomass survey, and
(2) Increase our understanding of the winter ecology and biology of hake in the California Current Ecosystem

Survey Map
2017 Winter Survey Map

From the survey map, you can see that we plan to cover the area between Newport, OR and San Diego, CA. The acoustic transects (shown) will take us ~175 nmi offshore over bottom depths from 50 to 4,500 m. We’ll use midwater trawling to verify that we’re seeing hake on the acoustics and check whether any other fish species are also present in those aggregations/schools. Fish we collect will be used for many measurements and collections – length, weight, age, sex, macro and microscopic maturity, diet, genetics, and some other projects.

Along the transects, we’ll stop at stations and use a Conductivity-Temperature-Depth (CTD) sensor to measure temperature, salinity, dissolved oxygen, and other things that may ultimately help us to understand why we find hake where we find them. A 0.5 m diameter net pulled vertically through the water, and a pair of 0.5 m diameter nets (a “bongo”) pulled obliquely through the water, will tell us about the invertebrate zooplankton species that are here. 

You can always use the link to the left “Track the NOAA Ship Bell M. Shimada” to see where we are. The science fun is just beginning!

Tagged: Hake, Acoustics, Winter hake research, FEAT, FRAM, Oceanography, Ecosystem, California Current Large Marine Ecosystem, CCLME, El Niño, La Niña, Climate

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June 2017
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