Richoux, N. B. Memorial University of Newfoundland, nrichoux@morgan.ucs.mun.ca
Thompson, R. J. Memorial University of Newfoundland, thompson@morgan.ucs.mun.ca

 
REGULATION OF PARTICLE TRANSPORT WITHIN THE VENTRAL GROOVE OF THE MUSSEL GILL (MYTILUS EDULIS) IN RESPONSE TO VARIATIONS IN TEMPERATURE AND AMBIENT PARTICLE CONCENTRATION
 
In order to understand thoroughly the feeding processes of the blue mussel, Mytilus edulis, in response to variable environmental experiences in nature, it is important to examine individually the different components that comprise its feeding system. The ciliated ventral food groove represents one of these primary components, within which the majority of food particles trapped by the gill are transported to the labial palps and gut. The ability of mussels to adjust particle transport rates within this groove may serve as an important feeding regulatory mechanism in response to variations in the environment. Using video endoscopy, mucous strand velocities in the ventral groove of M. edulis were determined in response to manipulations of ambient particle concentration and temperature. Mucous strand velocities decreased with increasing ambient particle concentration. This finding supports the hypothesis that M. edulis possesses compensatory mechanisms involving particle transport at the level of the ventral groove cilia to deal with changes in food availability. Furthermore, mucous strand velocities in the ventral groove increased when the ambient temperature of mussels acclimated to 4.5 C was increased to 15 C. This response is consistent with standard physiological responses of ciliary systems to changes in temperature.
 
Day: Wednesday, Feb. 3
Time: 03:45 - 04:00pm
Location: Hilton of Santa Fe
 
Code: SS21WE0400H