| Title: | Microrheology of haemolymph plasma of the bumblebee Bombus terrestris |
| Author(s): | Lechantre A; Martinet B; Thevenet V; Souramasing OS; Bico J; Abou B; |
| Address: | "Matiere et Systemes Complexes, UMR7057 CNRS - Universite Paris Cite, 75205 Paris, France. Physique et Mecanique des Milieux Heterogenes, UMR7636 CNRS, ESPCI Paris, Universite Paris Sciences & Lettres & Sorbonne Universite, 75005 Paris, France. Universite de Mons (UMons), Research institute of Biosciences, Laboratory of Zoology, Place du Parc 20, 7000 Mons, Belgium" |
| ISSN/ISBN: | 1477-9145 (Electronic) 0022-0949 (Linking) |
| Abstract: | "Viscosity, which impacts the rate of haemolymph circulation and heat transfer, is one of the transport properties that affects the performance of an insect. Measuring the viscosity of insect fluids is challenging because of the small amount available per specimen. Using particle tracking microrheology, which is well suited to characterise the rheology of the fluid part of the haemolymph, we studied the plasma viscosity in the bumblebee Bombus terrestris. In a sealed geometry, the viscosity exhibits an Arrhenius dependence with temperature, with an activation energy comparable to that previously estimated in hornworm larvae. In an open to air geometry, it increases by 4-5 orders of magnitude during evaporation. Evaporation times are temperature dependent and longer than typical insect haemolymph coagulation times. Unlike standard bulk rheology, microrheology can be applied to even smaller insects, paving the way to characterise biological fluids such as pheromones, pad secretions or cuticular layers" |
| Keywords: | Bees Animals Larva Rheology *Hemolymph Viscosity Temperature Biological fluids Insect physiology; |
| Notes: | "MedlineLechantre, Amandine Martinet, Baptiste Thevenet, Veronique Souramasing, Oune-Saysavanh Bico, Jose Abou, Berengere eng Research Support, Non-U.S. Gov't England 2023/06/30 J Exp Biol. 2023 Jul 1; 226(14):jeb245894. doi: 10.1242/jeb.245894. Epub 2023 Jul 28" |
