Editorial Comment ///

Wail and blubber blabber. There now exist dozens of scientific studies investigating the effects of seismic surveying on marine mammals. There are only a few anecdotal cases of harm or death, possibly caused by military use of sonar and scientific use of higher-frequency seismic sources. To date, there is no evidence of any harm to marine mammals due to oilfield-type seismic surveying. Moreover, there is no hint of evidence whatsoever that seismic surveying harms marine mammal populations. So, in the absence of real harm, there has been a shift in emphasis toward investigating behavioral changes. This has generally been difficult to ascertain, to the point of showing that a whale even acknowledges the existence of a seismic vessel.

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