Boat Noises Distract Crabs

Hello world,
Hermit crabs actually can be distracted. The noise of the boat disturbs them from looking out for predators, and slows their reaction time down by about 20 seconds. This research, by Blumstein of UCLA, concurs with the research of Slabbekoorn of Leiden University. He says that when chaffinches are in a noisy areas they spend more time looking for predators than they do normally. Urban enviroments also have an effect on the European robin. The amount of noise pollution alters when the robins start their nocturnal songs. I think that the crabs will eventually get used to the noise, since many other species have managed to adapt to human activities. But I wonder why noise alters the timing of the European robins' song.
Here's the link;
http://news.discovery.com/animals/hermit-crabs-noise-distraction.html
Knights and away!