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NOAA Fisheries Using Saildrones To Gather Data On West Coast Fish Populations
Posted on Friday, June 29, 2018 (PST)

NOAA Fisheries’ two West Coast Science laboratories are joining forces with the Alameda, Calif., company Saildrone Inc. to test the first use of autonomous, wind and solar-powered vehicles to gather essential data on West Coast fish populations, including commercially valuable species such as hake, sardine, and anchovy.

 

Two saildrones will launch from Neah Bay, Wash., and three will launch from Saildrone’s home base in Alameda in late June. The drones will undertake different missions, all related to improving the efficiency and accuracy of fisheries stock assessments off the West Coast. Stock assessments make estimates of fish populations, which the Pacific Fishery Management Council and NOAA Fisheries use in setting fishing rules and limits for the commercial fishing industry.

 

Four of the saildrones will duplicate the path of the NOAA Fisheries ship Reuben Lasker as it collects data on populations of sardine, anchovy and other small fishes, to also survey hake, a deep-water species that is one of the West Coast’s most valuable commercial fisheries. Two of these drones will launch from Neah Bay and two from Alameda. Scientists from the Northwest Fisheries Science Center in Seattle and Fisheries and Oceans Canada will work with Saildrone to manage the research. Scientists can adjust the drones’ assignments in real time.

 

“This a real opportunity for us to test new and likely better ways of collecting data that informs some of our most important decisions on fisheries management,” said Larry Hufnagle, a NWFSC research scientist who will help direct the mission.

 

A fifth saildrone will explore different approaches to improving the accuracies and efficiencies of future stock assessments. Scientists from the Southwest Fisheries Science Center in La Jolla, Calif., will help manage the mission with Saildrone. These experiments have four objectives.

 

-- Collect data closer to shore than NOAA ships can safely navigate, to estimate fish in shallow water.

-- Survey ahead of the ship, to enable the ship to focus on the most productive waters.

-- Study the same area on multiple days, to study the vertical-migration and schooling behaviors of various fish species.

-- Survey fish stocks as they migrate past a repeated saildrone transect, to improve the efficiency of ecosystem assessments.

 

The SWFSC conducts stock assessments of small pelagic fishes such as sardines, mackerels, and anchovies.

 

The saildrones can transmit some data each day, but full details will be downloaded from the vehicles at the end of the mission. The saildrones are designed to remain independently in the field for up to a year, although the four-saildrone mission will run up to 100 days, and the fifth saildrone may be deployed for up to six months. A saildrone typically travels at less than two knots, or a couple miles per hour, while the ship travels at 10 knots, leading to the use of multiple autonomous vehicles to cover the ship’s survey course.

 

The efforts will answer questions of whether autonomous data collection can improve the effectiveness and efficiency of fisheries management on the West Coast. If the saildrones can add more complete data or make better use of the data collected by ships, they have potential to increase the precision and accuracy of NOAA Fisheries and DFO stock estimates.

 

Scientists noted, however, that there are tradeoffs between the use of ships and autonomous vehicles in terms of time, and the suite of data that can be collected by each platform.

 

“We’re fortunate that Saildrone has been flexible enough to figure out ways to test these different ideas about how they might add value to what we do,” said Toby Garfield, Acting Deputy Director of the SWFSC, who is helping direct the mission of the fifth saildrone. “We’re responsible for managing and conserving marine resources, and this all adds to the long-term data that helps us do that effectively.”

 

NOAA Fisheries' Alaska Fisheries Science Center has been testing Saildrone technology, along with NOAA Research's Pacific Marine Environmental Laboratory in Alaska for the past three years to gather oceanographic data, acoustic data on endangered North Pacific right whales, information on walleye pollock, and for prey surveys within the foraging range of a declining population of northern fur seals. This year, the focus in Alaska will be on studying abundance and distribution of Arctic cod in the Chukchi Sea.

 

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