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| Jenkinson, Ian; Claireaux, Guy; Gentien, Patrick. |
| Intertidal mudflats are important nursery grounds for juveniles of many fish species. However, they are being used increasingly to farm bivalve molluscs, which produce large amounts of organic "fluff", overlying the mud. Fish such as sole, Solea solea, hide in this fluff from potential predators, but the energy consumed by respiring the fluff may be high due to its biorheological properties. We developed an ichthyoviscometer. It incorporates a freshly killed fish as a viscometer, and we developed it to measure the rheological properties of fluids and suspensions, including fluff, at scales encompassing those in gill ventilation. We have shown that the rheological behaviour of fluff is close to that of a gel with a yield stress strongly dependent on... |
| Tipo: Text |
Palavras-chave: Fish; Organic matter; Gill ventilation; Biorheology; Organic fluff; Mud flats. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2219.pdf |
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| Jenkinson, Ian. |
| Deformation and mixing in any medium are controlled by its viscosity and elasticity. The present study provides preliminary information, at oceanic shear rates, on the viscosity and elasticity in the bulk phase of seawater. Thirty-two samples of seawater, obtained on cruises at four times of year in a meso-oligotrophic part of the Mediterranean, were measured for bulk-phase viscoelastic properties in an oscillating-shear Couette flow with measuring gap 0.5 mm, over shear rates gamma from 0.0021 to 0.286 s-1. Fifteen samples were obtained on a single cruise in the German Bight, North Sea, when Phaeocystis blooms were taking place, and these were similarly measured at gamma from 0.0021 to 0.973 s-1. The bulk-phase measurements suffered interference... |
| Tipo: Text |
Palavras-chave: RHEOLOGY; PHYTOPLANKTON; ORGANIC AGGREGATES; SURFACE MICROLAYER; DISSOLVED ORGANIC MATTER (DOM). |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00099/21057/18683.pdf |
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| Reguera, Beatriz; Wells, Mark; Zingone, Adriana; Fraga, Santiago; Azavedo, S.; Magalhaes, V.; Jenkinson, Ian; Rodriguez-hernandez, Francisco; Anderson, Don M.; Hallegaeff, Gustaaf; Davidson, Keith; Hess, Philipp; Hegaret, Helene. |
| Tipo: Text |
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| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00621/73293/72481.pdf |
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