Noordkapers in de stress

Gestart door HPM, februari 08, 2012, 11:39:00 AM

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"Ships' propellers emit sound in the same frequency range that some
whales use for communicating, and previous studies have shown the
whales change their calling patterns in noisy places.

Now, researchers have measured stress hormones in whale faeces, and
found they rose with the density of shipping."


Herman van der Meer