At dusk, millions of fishes, crustaceans, squids, and other animals leave the ocean’s twilight zone and swim to the surface. At dawn, they return to deeper waters. New research by MBARI Senior Scientist Kelly Benoit-Bird and Mark Moline—director of the University of Delaware’s School of Marine Science & Policy—used autonomous robotics outfitted with acoustic technology to examine the timing of animals’ movements out of the depths. Their findings shed new light on why deep-sea animals embark on their massive migration each night.
Click here for original story, Vertical migration timing illuminates importance of predator pressure in the ocean’s twilight zone
Source: Phys.org