November 10, 2020 — The following was released by NOAA Fisheries:
Scientists looking at the effects of underwater pile driving and construction noise on sea life have found that black sea bass can hear these sounds. The noise may interfere with their natural behavior.
Their study is the first to look at the impact of ocean noise on this fish species. It found that younger fish were more sensitive to sounds than older fish. The frequencies at which the fish are most sensitive to sound directly overlap with frequencies of human-produced noise pollution. This noise comes from activities like shipping and the underwater construction required for offshore wind farms.
“No one knew for sure how much black sea bass can hear and how that changes as they age,” said Beth Phelan, a fishery biologist at the Northeast Fisheries Science Center’s laboratory at Sandy Hook, New Jersey and a co-author of the study. “We do know that black sea bass are attracted to underwater structures, and have anecdotal information that they move away from noise. We had to first determine the range of sounds they can hear by giving them a type of hearing test, much like we do to humans.”
Black sea bass are a commercially and recreationally important fish in the Mid-Atlantic Bight, the coastal region from Cape Hatteras, North Carolina to southern New England. Wind farms planned in the region overlap with current black sea bass habitat, exposing fish to construction and operational noises. Pile driving, for example, produces sounds that might stress fish, impacting their choice of habitat, feeding, social interaction and reproduction.