Newest NOAA fisheries survey ship begins West Coast and Alaska whale survey

Newest NOAA fisheries survey ship begins West Coast and Alaska whale survey
The Reuben Lasker is the fifth in a series of sophisticated fisheries survey ships built to meet NOAA Fisheries' specific data collection requirements. Credit: NOAA Fisheries/SWFSC

NOAA's newest research ship, the Reuben Lasker, departed San Diego this week on its first scientific mission that includes surveying gray whales along the West Coast. The survey will also search the Gulf of Alaska for right whales, among the most rare and endangered whales on Earth.

The expedition is a collaboration between the Southwest Fisheries Science Center in La Jolla, California, and Alaska Fisheries Science Center in Seattle to take advantage of the Lasker's advanced design and technology. The Lasker is engineered to operate more quietly than other similar ships, minimizing disturbance to the fish or marine mammals it is studying, and carries the latest navigation and acoustic technology for tracking and assessing fish and marine mammal populations.

"This is a great opportunity for both science centers to make use of this new ship to answer some important questions about different species of whales," said Dave Weller, a marine biologist at the Southwest Fisheries Science Center and chief scientist for the voyage. "We see this as a model for how we may work together in the future."

Scientists have named the trip the Collaborative Large Whale Survey, or CLAWS for short. Accurate information on whale populations helps NOAA Fisheries assess their abundance and distribution as well as evaluate possible impacts from commercial fishing, shipping and other human activities.

The Lasker departed Thursday, July 9, on schedule to reach Kodiak, Alaska, on Aug. 1. The roughly 10 scientists aboard will begin surveying for after the ship passes north of the north end of Vancouver Island. Their interest is in a group of gray whales that does not migrate all the way north to summer in the Bering and Chukchi seas like most gray whales, but instead spend their summers feeding between Kodiak and Northern California.

Newest NOAA fisheries survey ship begins West Coast and Alaska whale survey
An endangered right whale surfaces off Kodiak, Alaska, in 2005. Only about 30 right whales remain in the North Pacific, making among the world's most endangered whales. Credit: Brenda Rone/Alaska Fisheries Science Center

The population of gray whales in the eastern Pacific Ocean is estimated at about 20,000, but biologists want to know how many of those summer south of the Aleutian Islands and whether they are genetically distinct from whales that summer farther north in the Bering and Chukchi seas.

"Is this a separate unit of whales we should be concerned about? Or is there a single population within the eastern North Pacific? Those are the questions we're trying to answer," Weller said. "We may be surprised at how many there are, or we may be surprised to find there are not that many."

Once the ship reaches Kodiak, its focus will shift to a much more rare and imperiled species: North Pacific right whales, which once numbered perhaps about 10,000 to 20,000 in the Pacific but were hunted nearly to extinction. The Alaska Fisheries Science Center now estimates that about 30 adult right whales remain, making them likely the world's smallest whale population.

"Any data we can collect, even a photograph, would be a great achievement," said Brenda Rone, a research biologist at the Alaska Fisheries Science Center and leader of the second leg of the Lasker's voyage, which will use visual observations as well as acoustic monitoring to search a swath of the Gulf of Alaska for right whales during much of August. Right whales once used the area extensively, but it's not clear if they still do, or indeed how many survive today. The scientists aboard will also survey for blue and , which sometimes frequent the same waters.

Newest NOAA fisheries survey ship begins West Coast and Alaska whale survey
A gray whale migrates along the California Coast. Credit: NOAA Fisheries/SWFSC

"Even though they're such a critically endangered population it's difficult to get the opportunity to learn much about North Pacific right whales. They are incredibly rare and it requires a lot of effort just to locate them," Rone said. "This is the first dedicated survey for right whales in the Gulf of Alaska. It's really invaluable to have this kind of time aboard a large vessel in this area."

Following the August search for , the Lasker will return south from Kodiak on the third of five legs that will conclude back in San Diego Nov. 9. On the trip south the scientists aboard will again focus on gray feeding south of the Aleutian Islands.

NOAA Ship Reuben Lasker is part of NOAA's fleet of specialized ships and is operated, managed and maintained by the NOAA Office of Marine and Aviation Operations, which includes commissioned officers of the NOAA Corps and civilian wage mariners. The ship is homeported in San Diego.

Construction of the Reuben Lasker was funded by the American Recovery and Reinvestment Act, and it is the fifth in a series of sophisticated fisheries survey ships built to meet the NOAA Fisheries Service's specific data collection requirements.


Explore further

Alaska researcher investigates fin whale deaths

Provided by NOAA Headquarters
Citation: Newest NOAA fisheries survey ship begins West Coast and Alaska whale survey (2015, July 10) retrieved 13 July 2020 from https://phys.org/news/2015-07-noaa-fisheries-survey-ship-west.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
22 shares

Feedback to editors

User comments