Saving Seafood

Massachusetts: Lectures at New Bedford Whaling Museum will focus on restoring ocean health

April 18, 2018 — “Where the Land Meets the Sea,” a series of lectures at the New Bedford Whaling Museum in 2018, will feature projects, organizations and people who are working to restore and maintain ocean health and marine wildlife.

The series premieres April 26 with “Underwater Yellowstones.” Experts will explore marine sanctuaries off the coast and their associated benefits and challenges for fish, whales, scientists and humans. “Underwater Yellowstones” speakers are Benjamin Haskell, acting superintendent of Stellwagen Bank National Marine Sanctuary, NOAA ; Jenni Stanley, marine scientist with Northeast Fisheries Science Center, NOAA; and Michelle Bachman, habitat coordinator for New England Fishery Management Council.

The lecture begins at 7 p.m. and will be preceded by a reception at 6. Tickets are $10 for museum members and $15 for nonmembers. To register call (508) 997-0046 (ext. 100) or visit whalingmuseum.org.

Read the full story at the New Bedford Standard-Times

 

Can you hear me? NOAA studies boat noise and fish

January 8, 2018 — NOAA scientists studying sounds made by Atlantic cod and haddock at spawning sites in the Gulf of Maine have found that vessel traffic noise is reducing the distance over which these animals can communicate with each other.

As a result, daily behavior, feeding, mating, and socializing during critical biological periods for these commercially and ecologically important fish may be altered, according to a study published in Nature Scientific Reports.

Three sites in Massachusetts Bay included two inside Stellwagen Bank National Marine Sanctuary, a region well known to whale-watchers from the Cape because whales feed in the plankton-rich bank, and one inshore south of Cape Ann. All were monitored for three months by researchers at the Northeast Fisheries Science Center (NEFSC) laboratory in Woods Hole, and at the sanctuary offices in Scituate.

Vocalizations, such as Atlantic cod grunts and haddock knocks, were recorded by bottom-mounted instruments at each site during spawning in winter and spring.

“We looked at the hourly variation in ambient sound pressure levels and then estimated effective vocalization ranges at all three sites known to support spawning activity for Gulf of Maine cod and haddock stocks,” said Jenni Stanley, a marine research scientist in the passive acoustics group at the NEFSC and SBNMS and lead author of the study.

“Both fluctuated dramatically during the study. The sound levels appear to be largely driven by large vessel activity, and we found a signification positive correlation with the number of Automatic Identification System (AIS) tracked vessels at two of the three sites.”

AIS is an automatic tracking system, used on ships and by vessel traffic services. It provides information on a vessel, such as its unique identification number, position, course and speed, which can be displayed on a shipboard radar or electronic chart display.

Read the full story at the Wicked Local

 

Boat noise silencing cod, haddock love songs

December 19, 2017 — Communication among cod comes in the form of vocalized grunts. And for haddock, it’s knocks.

Now it appears that increasing traffic noise from large vessels in the Gulf of Maine may be reducing the range of communication for the two species of Atlantic groundfish, according to research by NOAA Fisheries scientists.

The study, undertaken by scientists from NOAA Fisheries’ Northeast Fisheries Science Center and published in Scientific Reports, said the decline in the ability to communicate may generate widespread changes in the species’ “daily behavior, feeding, mating, and socializing during critical biological periods for these commercially and ecologically important fish.”

Cod, for instance, vocalize to attract mates and listen for predators and “not hearing those signals could potentially reduce reproductive success and survival,” according to the study.

Using bottom-mounted instruments to record the cod grunts and haddock knocks, scientists spent three months monitoring the sounds made by the two species at three separate spawning sites within the Gulf of Maine — two inside Stellwagen Bank National Marine Sanctuary and one inshore south of Cape Ann.

“We looked at the hourly variation in ambient sound pressure levels and then estimated effective vocalization ranges at all three sites known to support spawning activity in the Gulf of Maine cod and haddock stocks,” said Jenni Stanley, a marine research scientist and lead author of the study. “Both fluctuated dramatically during the study.”

The variations of the sound levels, she said, appear to be driven by the activities of large vessels.

Read the full story at the Gloucester Times