Park, S. University of California at Davis, skpark@ucdavis.edu
Brett, M. University of Washington, mtbrett@u.washington.edu
Mueller-Navarra, D. C.. University of California at Davis, doerthe.navarra@dkrz.de
Goldman, C. R.. University of California at Davis, crgoldman@ucdavis.edu

 
HIGHLY UNSATURATED FATTY ACID (HUFA) CONTENT AND P:C RATIO AS SESTON FOOD QUALITY INDICES FOR DAPHNIA PULEX
 
HUFA limitation and P limitation hypotheses are both thought likely explanations for Daphnia growth in pelagic ecosystems. To study how much of the variation in Daphnia growth can be explained by seston HUFA content and seston P:C ratio, several flow-through experiments for Daphnia growth were conducted with 3 algal species (Cryptomonas, Scenedesmus, and Synechococcus) and 4 different algal physiological status (nutrient saturated, P-limited, N-limited, senescent). The 3 different algal species represented a gradient of HUFA while different algal physiological status created a range of P:C and N:C ratios. We simultaneously measured growth, respiration and carbon incorporation rates. To confirm the direct utilization of HUFA by Daphnia, HUFA content in Daphnia were measured before and after growth experiments.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS21WE0432S