Jonasdottir, S. H. Danish Institute for Fisheries Research, sjo@dfu.min.dk

 
FOOD QUALITY VS. PRODUCTION OF MARINE COPEPODS
 
The quality and quantity of available food have long been recognised as the some of the major factors in controlling egg-production rates of marine copepods. The importance of food quality is however, frequently ignored. This is especially true in field measurements when population growth is being estimated. Numerous studies have clearly demonstrated that chlorophyll, carbon and nitrogen content of the potential food cannot explain the observed variability of egg production rates of copepods in nature. Still these are often the only variables measured in conjunction with measurements of secondary production. Furthermore, to complicate the issue, high egg production rates do not have to mean high population growth rates, as hatching success of eggs are found to considerably vary. This poses the questions: what is food quality and how is it best measured? I will discuss and review the current status of food quality research for marine copepods - which directions look promising and touch on the issue, how we can differentiate between the effects of food quality and toxicity (deleterious effects).
 
Day: Wednesday, Feb. 3
Time: 09:00 - 09:15am
Location: Hilton of Santa Fe
 
Code: SS21WE0900H