The general survey area includes: the continental margin to the west of the Antarctic Peninsula extending from the northern tip of Adelaide Island to the southern portion of Alexander Island and east into Marguerite Bay. The MOCNESS-1 unit has a net mouth opening of one square meter at a 45 degree tow angle, net size of 335 microns, and the ability to sample at nine different depth intervals over the duration of the tow. Biomass (wet weight) and abundance were determined for each depth interval sampled principally by the technique of silhouette digitization (Little. W.S., Copley, N.J. 2003. WHOI Silhouette Digitizer version 1.0 User's Guide. Woods Hole Oceanographic Institution Technical Report #2003-05, 63 pp). Samples were screened for 32 specific categories of zooplankton organisms or groups. Note: As of this posting (May 2004), only data for 2001 are reported. Ships/cruises/dates: RVIB Nathaniel B. Palmer / NBP0103 / Apr 29-May 29 2001 RVIB Nathaniel B. Palmer / NBP0104 / Jul 27-Aug 25 2001 Note: As of this posting (May 2004), only data for 2001 are reported. Ships/cruises/dates: RVIB Nathaniel B. Palmer / NBP0103 / Apr 29-May 29 2001 RVIB Nathaniel B. Palmer / NBP0104 / Jul 27-Aug 25 2001