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Effects of airgun discharges used in seismic surveys on development and mortality in nauplii of the copepod Acartia tonsa by Emilie Hernes Vereide; Marina Mihaljevic; Howard I. Browman; David M. Fields; Mette Dalgaard Agersted; Josefin Titelman; Karen de Jong is a Environmental Science article available to read on EtoBox.

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Seismic surveys are conducted worldwide to explore for oil and gas deposits and to map subsea formations. The airguns used in these surveys emit low-frequency sound waves. Studies on zooplankton responses to airguns report a range of effects, from none to substantial mortality. A field experiment was conducted to assess mortality and naupliar body length of the calanoid copepod Acartia tonsa when exposed to the discharge of two 40-inch airguns. Nauplii were placed in plastic bags and attached to a line at a depth of 6 m. For each treatment, three bags of nauplii were exposed to one of three treatments for 2.5 h: Airgun array discharge, a boat control, or a silent control. After exposure, nauplii were kept in filtered seawater in the laboratory without food. Immediate mortality in the nauplii was approximately 14% compared to less than 4% in the silent and boat control. Similarly, there was higher mortality in the airgun exposed nauplii up to six days after exposure compared to the control treatments. Nearly all of the airgun exposed nauplii were dead after four days, while >50% of the nauplii in the control treatments were alive at six days post-exposure. There was an interaction b

Who reads Effects of airgun discharges used in seismic surveys on development and mortality in nauplii of the copepod Acartia tonsa?

Author

Emilie Hernes Vereide; Marina Mihaljevic; Howard I. Browman; David M. Fields; Mette Dalgaard Agersted; Josefin Titelman; Karen de Jong

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)