Paffenhofer, G. A.. Skidaway Institute of Oceanography, paffenhofer@skio.peachnet.edu
, . A.. ,

 
ABUNDANT PLANKTONIC COPEPODS IN WARM OCEANS: OCEANIC VERSUS NERITIC REGIONS
 
An assessment of the abundance of planktonic copepods in open tropical oceans reveals that the genera Oithona, Oncaea and Clausocalanus dominate. None of these three genera produces a feeding current and all three carry egg-sacs, i.e. release nauplii. In neritic regions, the genera Paracalanus, Centropages and Temora usually dominate numerically. Each of these three genera produces a feeding current and releases eggs. Whereas subtropical and tropical oceanic regions are characterized by continuous low food concentrations and maximum abundances of copepods rarely exceeding 1,000 m -3, neritic regions show fluctuating food concentrations, and copepod abundances ranging from ~ 1,000 to > 20,000 m -3. Utilizing published information on rates and behavior, and unpublished results on behavior, an attempt is made to reveal the mechanisms responsible for the dominance of certain species in oligotrophic open ocean regions as compared to mesotrophic neritic environments.
 
Day: Tuesday, Feb. 2
Time: 03:45 - 04:00pm
Location: Hilton of Santa Fe
 
Code: SS23TU0345H