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1. Sample for pelagic fishes including juvenile and immature salmon. 2. Document the spatial distribution of macroplankton within the study area 3. Characterize water column properties throughout the study area. 4. Conduct marine mammal and seabird observations

Determine the selectivity characteristics of the Nordic 264 midwater trawl in relation to potential escapement of coastal pelagic species (CPS) between Newport, Oregon and San Diego, California. The following are specific objectives for this survey. I.D.1. Continuously sample pelagic fish eggs using the Continuous Underway Fish Egg Sampler (CUFES). The data will be used to locate potential adult CPS schools to fish on in the evening hours. I.D.2. Continuously sample multi-frequency acoustic backscatter using the Simrad EK60. The data will be used to locate potential CPS targets to fish on during the evening hours. I.D.3. Continuously sample sea-surface temperature, salinity, and chlorophyll-a using a thermosalinometer and fluorometer. These data will be used to estimate the physical oceanographic habitats for target species. I.D.4. Continuously sample air temperature, barometric pressure, and wind speed and direction using an integrated weather station. I.D.5. Sample fish near the surface each night by conducting 2-5 surface trawls at stations or random sites selected each night by the Chief Scientist (CS). The data will be used to determine the selectivity characteristics of the Nordic 264 midwater trawl for CPS. I.D.6. Conduct 24 hrs of Saildrone comparison operations to validate carbon, fisheries acoustics, ADCP, oceanographic, and meteorological sensors integrated onto the Saildrone UAS.

This survey is part of a long-term Bonneville Power Administration-funded effort by academic and federal scientists to understand coastal ecosystems and biological and physical processes that may influence recruitment variability of salmon in Pacific Northwest waters. Prior to a potential switch to the R/V Shimada as a long-term platform, we intend to compare catches between vessels (The R/V Shimada and the F/V Frosti) on the continental shelf of Washington. Sampling will occur during the day for 3 days (23-25 May) with surface trawls along pre-specified transects. One trawl will be performed as we leave the Strait of Juan de Fuca on the afternoon of the 22nd. In addition, a bongo net will be towed several times each night between 2300 and 0500 (nights of 19-22 June).

This project continues long-term studies of the Northern California Current (NCC) pelagic ecosystem and includes study of broad-scale patterns of hydrography, phytoplankton and zooplankton and ocean acidification/hypoxia in the NCC Large Marine Ecosystem off Oregon and Washington. Ecosystem studies were initiated in 1996, and studies of ocean acidification/hypoxia were initiated in 2010.

2019 Joint US-Canada Integrated Ecosystem and Pacific Hake Acoustic-Trawl Survey

NWFSC-led investigations of trawling gear and EK60 and EK80 equipment in support of the Pacific hake (Merluccius productus) stock assessment and the collection of oceanographic data.

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Our routine ecosystem survey will make hydrographic measurements with a CTD, collect water samples for chemical analyses with a Niskin bottle rosette, and collect zooplankton samples with towed plankton nets at an array of stations along transect lines extending across the Oregon and the northern California coast. Beam trawling will also occur at a subset of inshore stations.

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