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Transitory Eye Shapes and the Vertical Distribution of Two Midwater Squids

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Title: Transitory Eye Shapes and the Vertical Distribution of Two Midwater Squids
Authors: Young, Richard Edward
Issue Date: Jul 1975
Publisher: University of Hawai'i Press
Citation: Young RE. 1975. Transitory eye shapes and the vertical distribution of two midwater squids. Pac Sci 29(3): 243-255.
Abstract: In two cranchiid squids, Sandalops melancholicus and Taonius pavo, the
shapes of the eyes change with growth. Compressed eyes with ocular appendages
occur in the larvae living in the upper few hundred meters of the ocean. Tubular
eyes occur in juveniles that live within a depth zone between about 400 and 700 m.
Nearly hemispherical eyes are found in adults living at depths greater than 700 m.
The shapes of the compressed and tubular eyes offer strong countershading
advantages to squids living at depths where downwelling light is important in
prey-predator relationships.
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 29, Number 3, 1975

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