Hydrodynamic sensing and behavior by oyster larvae in turbulence and waves

The Journal of Experimental Biology
Heidi L FuchsF Javier Diez

Abstract

Hydrodynamic signals from turbulence and waves may provide marine invertebrate larvae with behavioral cues that affect the pathways and energetic costs of larval delivery to adult habitats. Oysters (Crassostrea virginica) live in sheltered estuaries with strong turbulence and small waves, but their larvae can be transported into coastal waters with large waves. These contrasting environments have different ranges of hydrodynamic signals, because turbulence generally produces higher spatial velocity gradients, whereas waves can produce higher temporal velocity gradients. To understand how physical processes affect oyster larval behavior, transport and energetics, we exposed larvae to different combinations of turbulence and waves in flow tanks with (1) wavy turbulence, (2) a seiche and (3) rectilinear accelerations. We quantified behavioral responses of individual larvae to local instantaneous flows using two-phase, infrared particle-image velocimetry. Both high dissipation rates and high wave-generated accelerations induced most larvae to swim faster upward. High dissipation rates also induced some rapid, active dives, whereas high accelerations induced only weak active dives. In both turbulence and waves, faster swimming and a...Continue Reading

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Citations

Jul 30, 2015·Integrative and Comparative Biology·M A R Koehl, T Cooper
Oct 6, 2017·The Journal of Experimental Biology·Heidi L FuchsAdam J Christman
May 22, 2016·The Journal of Experimental Biology·Jeanette D WheelerLauren S Mullineaux
Dec 13, 2017·Proceedings of the National Academy of Sciences of the United States of America·François-Gaël MichalecMarkus Holzner
Aug 15, 2019·Annual Review of Cell and Developmental Biology·Jeanette D WheelerRoman Stocker
Jul 25, 2018·Proceedings of the National Academy of Sciences of the United States of America·Heidi L FuchsAdam J Christman
Sep 4, 2015·The Journal of Experimental Biology·Heidi L FuchsF Javier Diez

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