Predator and flow influence on bivalve clam excurrent jet characteristics

Delavan, S.K.; Webster, D. R.

doi:10.1016/j.jembe.2012.07.007

Cited by 6 publications

(1 citation statement)

References 37 publications

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“…Nishizaki and Ackerman (2017) used PIV to characterize exhalant flow structures produced by dreissenid mussels. In another PIV application, Delavan and Webster (2012) found an increase in variance in Mercenaria mercenaria exhalant siphon velocities in the presence of a predator. André et al (1993) used PTV to study cannibalism on larvae by Cerastoderma edule.…”

Section: Introductionmentioning

confidence: 93%

Model-assisted measurements of suspension-feeding flow velocities

Clos

Jones

Carrier

et al. 2017

Journal of Experimental Biology

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Benthic marine suspension feeders provide an important link between benthic and pelagic ecosystems. The strength of this link is determined by suspension-feeding rates. Many studies have measured suspension-feeding rates using indirect clearance-rate methods, which are based on the depletion of suspended particles. Direct methods that measure the flow of water itself are less common, but they can be more broadly applied because, unlike indirect methods, direct methods are not affected by properties of the cleared particles. We present pumping rates for three species of suspension feeders, the clams Mya arenaria and Mercenaria mercenaria and the tunicate Ciona intestinalis, measured using a direct method based on particle image velocimetry (PIV). Past uses of PIV in suspensionfeeding studies have been limited by strong laser reflections that interfere with velocity measurements proximate to the siphon. We used a new approach based on fitting PIV-based velocity profile measurements to theoretical profiles from computational fluid dynamic (CFD) models, which allowed us to calculate inhalant siphon Reynolds numbers (Re). We used these inhalant Re and measurements of siphon diameters to calculate exhalant Re, pumping rates, and mean inlet and outlet velocities. For the three species studied, inhalant Re ranged from 8 to 520, and exhalant Re ranged from 15 to 1073. Volumetric pumping rates ranged from 1.7 to 7.4 l h for C. intestinalis. We also used CFD models based on measured pumping rates to calculate capture regions, which reveal the spatial extent of pumped water. Combining PIV data with CFD models may be a valuable approach for future suspension-feeding studies.

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Section: Introductionmentioning

confidence: 93%