... on the different days of measurement is correlated (angular correlation coefficient=−0.708, P=0.014). See Materials and methods for details. We conclude that, by day, burrow ventilation is affected by at least two mechanisms, their relative importance being determined primarily by wind speed in the boundary...

... ). The burrow can be ventilated for filter-feeding purposes, as in most Upogebiae, or mainly for respiratory purposes, as in most Callianassidae ( Atkinson and Taylor, 1988 ). Burrow ventilation is assumed to be energetically expensive ( Atkinson and Taylor, 1988 ) and is always performed periodically ( Farley...

... ). The kinematics of the structures involved in burrow ventilation and the resulting flow patterns in the vicinity of the shrimp are reasonably well understood, but the mechanisms of thrust production and the energy involved in ventilation need more investigation. The present study therefore concentrates on mapping...

... conditions, see Stamhuis et al. (1996) . * e-mail: [email protected] 5 5 1998 25 6 1998 © The Company of Biologists Limited 1998 burrow ventilation particle image velocimetry PIV tube-dwelling shrimp Callianassa subterranea metachrony ventilation...