Beers, J.R., and G.L. Stewart. 1969. Micro-zooplankton and its abundance
     relative to the larger zooplankton and other seston components. Marine
     Biol., 4: 182-189.

Spatial Coverage: Northeast Pacific Ocean, near San Diego to an oceanic site
                  southwest of Isla Guadalupe
Temporal Coverage:  February 1967
Language: English

Abstract: Micro-zooplankton populations in the upper 100 m were sampled from 
          5 marine environments in the northeast Pacific Ocean extending from 
          slope waters off San Diego to an oceanic site near Isla Guadalupe, 
          and their abundance related to that of the larger zooplankton, 
          phytoplankton (as estimated from chlorophyll a), and detritus.  The 
          micro-zooplankton and other components of the seston were subdivided
          into 3 fractions on the basis of size in the deck-mounted collecting
          unit of a seawater pumping system. Through the ephotic zone at each 
          site, the Protozoa,of which ciliates were the dominant forms, 
          accounted for 95% or more of the total micro-zooplankton numbers. 
          Their biomass, as volume, was estimated to be 13 to 28% of that of 
          the total micro-zooplankton. The standing stock of micro-zooplankton
          over the euphotic zone at the various sites, in terms of dry-weight,
          was estimated to be 14 to 34% (average 23%) of that of the 
          phytoplankton crop. Micro-zooplankton voulmes in the upper 100 m 
          were 21 to 26% of those for the larger zooplankton sampled over the 
          same depth.