<%@LANGUAGE="JAVASCRIPT" CODEPAGE="1252"%> 2005Design1
. .
HANDLING MANY ALGAE AT ONCE
.
The question is whether or not a calanoid copepod can take advantage if it suddenly encounters a high concentration of food items
.
Eucalanus pileatus from the Coral Sea demonstrates a large palette of food handling behaviors. Here the animal has to deal with many algae within a very small time interval. The zooxanthellae are leaky algae - normally they exchange chemicals with their host. The animal senses the food chemically and during the one second feeding bout tries to capture as many as possible
.
.
David Sutton (AIMS at that time) helped us with the food particles. He extracted the zooxanthellae from several soft corals minutes before we used them as food. The movies were made at 500 frames per second; here you see one clip at 30 frames per second. The other persons involved in obtaining this observations were Eleanor Hing-Fay, and Paul Dixon
.
Without a team it becomes very difficult to get such movies. Every co-worker is responsible for one task, e.g. introducing the algae at the right time at the right spot in the feeding current
.
Strickler, J.R. 1984. Sticky water: a selective force in copepod evolution. In: D.G. Meyers and J.R. Strickler [Eds.], Trophic Interactions within Aquatic Ecosystems, Westview Press, 187-239
.
Back to Copepod Central
.
© STRICKLER, UWM 2005 back to Strickler Central