Clarke, M. NMFS, 301 713 1875

 
EXPERIMENTAL STUDIES ON SUBTROPICAL ICHTHYOPLANKTON: USEFUL INPUTS TO MANAGEMENT OF MARINE PROTECTED AREAS?
 
To describe the processes within marine protected areas and to predict future ecosystem responses within these areas may require the application of both field and experimental studies. For example, we have experimentally examined the ontogenetic changes in the vertical migration of subtropical fishes. The vertical migration of larvae in response to light was assessed in four species of larvae. Larvae were placed in 160-cm Plexiglas tanks and their position in the tank was recorded every 6 hours for 48 hours. Experiments were conducted starting at 5 days after hatch and continued until larvae were near settlement. These studies show that while there are considerable interspecific differences in behavior of the larvae, generally larvae after the first five days of life are not passive particles as they drift, but are moving constantly within the water column. The extent and timing of this movement will affect their eventual pathway and recruitment back to the reefs. We discuss the implications that this may have on local larval retention. We contend that such simple experimental information of this kind may provide valuable input when considering the location of marine refugia.
 
Day: Wednesday, Feb. 3
Time: 04:45 - 05:00pm
Location: Sweeney Center
 
Code: SS09WE0445S