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Free Content Observations on the Behavior of the Pteropod Creseis Acicula Rang

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Descent velocities of anesthetized and non-anesthetized specimens of the pteropod Creseis acicula Rang were compared. Anesthetized specimens with wings extended descended in a vertical position at a greater velocity than non-anesthetized specimens which invariably descended in a vertical position. Anesthetized specimens in which the animal was withdrawn into the shell descended in a horizontal position at a slow velocity. Non-anesthetized animals were observed to change their rate of descent. Rate of descent is probably controlled by the angle, pitch and horizontal breadth of the wings.

Document Type: Research Article

Publication date: January 1, 1959

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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