Impacts of geophysical seismic surveying on fishing success

Impacts of geophysical seismic surveying on fishing success or more depending upon the site and depth of opera- In addition to immediate mortality, factors such tion. Changes in the water temperature, salinity and as physiological damage and behavioural change, stratification are also of importance (Richardson et al., leading to delayed mortality may also be caused by 1996). In areas where water depths are greater than airgun sound. Matishov (1992) found that exposure of 50 metres, sound typically spreads spherically, that cod (Gadus morhua) at a distance of 2 and 4 metres is at a rate of 20log R (where R is the ratio of the from an airgun led to eye damage, transient stunning, distance to which the sound levels are to be predicted and as a result of internal injuries, death within 48 [in metres] to the distance from source for which hours. Unfortunately, no exposure levels were deter- source levels are given [as a standard this is typically mined in their study, although these may be estimated 1 metre]). Simple spherical spreading rules may only at 214 to 220dB re 1Pa (Turnpenny and Nedwell, be applied with caution to shallow waters <10–50 1994). Sound levels at which physiological damage metres. Sound propagating in lesser depths http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reviews in Fish Biology and Fisheries Springer Journals

Impacts of geophysical seismic surveying on fishing success

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Publisher
Kluwer Academic Publishers
Copyright
Copyright © 2000 by Kluwer Academic Publishers
Subject
Life Sciences; Freshwater & Marine Ecology; Zoology
ISSN
0960-3166
eISSN
1573-5184
D.O.I.
10.1023/A:1008987014736
Publisher site
See Article on Publisher Site

Abstract

or more depending upon the site and depth of opera- In addition to immediate mortality, factors such tion. Changes in the water temperature, salinity and as physiological damage and behavioural change, stratification are also of importance (Richardson et al., leading to delayed mortality may also be caused by 1996). In areas where water depths are greater than airgun sound. Matishov (1992) found that exposure of 50 metres, sound typically spreads spherically, that cod (Gadus morhua) at a distance of 2 and 4 metres is at a rate of 20log R (where R is the ratio of the from an airgun led to eye damage, transient stunning, distance to which the sound levels are to be predicted and as a result of internal injuries, death within 48 [in metres] to the distance from source for which hours. Unfortunately, no exposure levels were deter- source levels are given [as a standard this is typically mined in their study, although these may be estimated 1 metre]). Simple spherical spreading rules may only at 214 to 220dB re 1Pa (Turnpenny and Nedwell, be applied with caution to shallow waters <10–50 1994). Sound levels at which physiological damage metres. Sound propagating in lesser depths

Journal

Reviews in Fish Biology and FisheriesSpringer Journals

Published: Oct 8, 2004

References

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