Diel vertical migration of a pelagic amphipod in the absence of fish predation |
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| Authors: | Dean W. Blinn Nevin E. Grossnickle Behrooz Dehdashti |
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| Affiliation: | (1) Department of Biological Sciences, Northern Arizona University, 86011 Flagstaff, Arizona, AZ, USA;(2) Department of Natural Sciences & Mathematics, Grand Canyon College, 85061 Phoenix, Arizona, AZ, USA;(3) Department of Biological Sciences, Northern Arizona University, 86011 Flagstaff, Arizona, AZ, USA |
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| Abstract: | The pelagic amphipod, Hyalella montezuma, migrates vertically into the surface waters at twilight in Montezuma Well, Arizona, USA despite the absence of fish predators or thermal stratification. We suggest that a persistent, dense, neustonic algal assemblage may provide a food resource incentive for the twilight ascent. |
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| Keywords: | amphipoda grazing Hyalella isothermal neuston vertical migration |
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