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The Role and Status of Nautilus in its Natural Habitat: Evidence from Deep- Water Remote Camera Photosequences
W. Bruce Saunders
Vol. 10, No. 4 (Autumn, 1984), pp. 469-486
Published by: Paleontological Society
Stable URL: http://www.jstor.org/stable/2400618
Page Count: 18
You can always find the topics here!Topics: Nautilus, Shrimp, Animals, Juveniles, Eels, Species, Sharks, Paleobiology, Cameras, Crabs
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Bottom site remote camera photosequences at depths of 73-538 m on forereef slopes in Palau show that Nautilus belauensis is a highly mobile, chemosensitive, epibenthic scavenger and opportunistic predator. The overall depth range of this species is ca. 70-500 m, but photosequences indicate a preferred range of 150-300 m. Nautilus is active both nocturnally and diurnally, locating bait sites within 1-2 h. Associated macrofauna includes caridean shrimps, crabs, and eels; teleosts are rare below 100 m, but sharks are recorded in most photosequences below 250 m. Summarily, Nautilus exhibits a combination of characters that typify deep-sea strategy, including reproductive tactics, growth rate, and population dynamics. This and other evidence suggest that fossil Nautilidae may have been deep-water forms, in contrast to the typically shallower water ammonoids, and that Nautilus is a normal component of the deep forereef rather than a late Cretaceous refugee from shallow water.
Paleobiology © 1984 Paleontological Society