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The eavesdropping operation on the harbor porpoise is pure drudgery. On a gray, rainy day, five biologists from the consulting firm BioConsult SH hoist bright yellow marker buoys over the stern of the Miljø into the Baltic Sea.
When the task is complete and the buoys are bobbing in the water behind the research ship, BioConsult head Georg Nehls looks satisfied. From now on, underwater microphones will record the tell-tale, staccato clicking noises the porpoises make to get their bearings. The signals help the researchers determine the number of animals and examine their behavior.
