Document Type
Article
Journal/Book Title/Conference
Transactions of the American Fisheries Society
Volume
121
Issue
3
Publisher
American Fisheries Society
Publication Date
1992
Keywords
visual feeding, juvenile, Bear Lake sculpin
First Page
395
Last Page
398
Abstract
Young-of-the-year Bear Lake sculpin Cottus extensus feed throughout the day on benthic invertebrates and cease feeding at night when they migrate to the metalimnion. We investigated their reliance on vision by conducting feeding trials at different light levels in the laboratory. Feeding rate reached a maximum at intermediate light levels (near 10^16 photons sm^–2 ss^–1; approximately 1 lux) but decreased as light intensity increased beyond this range. At this maximum rate, the fish fed nine times faster than they were able to feed in the dark, showing that young Bear Lake sculpin rely heavily upon vision to feed. The light intensity at which feeding was greatest corresponded to intensities found on the bottom of Bear Lake (40–60 m) during the day.
Recommended Citation
Neverman, D. and W.A. Wurtsbaugh. 1992. Visual feeding of juvenile Bear Lake sculpin. Trans. Am. Fish. Soc. 121:395-398.
Comments
Originally published by the American Fisheries Society.
Note: This article appears in the Transactions of the American Fisheries Society and has been posted here with permission from the publisher.