deep sea dvd - MSCI 210 Notes for Deep Sea DVD Over 60% of...

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MSCI 210 Notes for Deep Sea DVD Over 60% of the earth’s surface is covered with ocean over a mile deep. The depths are home to some of the strangest animals on earth. New species discovered on almost every dive. More people have traveled into space than have traveled to the depths of the ocean. Submarine from Harbor Branch . In the “twilight zone” many animals are transparent. The need to see, but avoid being seen by potential predators. 12 cm amphipod, two huge eyes practically fill its head and are used for detecting prey. Rich variety of jellies that live nowhere else besides the deep sea. Cilia propel them. Comb jellies let out long sticky nets to catch passing copepods. Siphonophores (colonial jellies) catch prey by: Survival in the twilight zone is all about seeing and not being seen. Hatchet fish have a way of confusing predators from below. What is the “evolutionary arms race” that has been waged for millions of years? How do hatchet fish avoid predators? How do animals with red pigment appear in the very deep? Many predators have tiny eyes and rely on sensitive antennae for detecting prey, give an example. What is bioluminescence? How is it generated? What is the purpose of it (give 2 examples)? Another way of attracting mates is through the release of chemicals into the water so mates can find each other. “Headlights” may be used to search out prey in the dark. The production of red light by fishes enables them to see red pigmented prey. Bioluminescence can be used in escape as well as attack, by confusing the potential predator thru the excretion of a liquid form. Below 150 m photosynthesis becomes impossible and no photosynthetic plants occur, just animals. Dominated by echinoderms: sea urchins, sea cucumbers, sea stars, and brittle stars. Chimera has sensory pits on its chin and large eyes for locating prey.
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deep sea dvd - MSCI 210 Notes for Deep Sea DVD Over 60% of...

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