Suspended and sinking particles were collected during ODP Leg 119 to the Indian Ocean sector of the Antarctic Ocean. Field work was carried out at four sampling sites in Prydz Bay. Two of these sites were located in the Outer Bay, and two in the Inner Bay. At the four locations, a total of ten deployments of a sediment trap array were made. The concentrations of carotenoids both in suspended and sinking particulate matter in Prydz Bay were analyzed using HPLC. Fucoxanthin was the dominant carotenoid pigments both in suspended and sinking particles. The present study also indicates that 19'-hexanoyoxyfucoxanthin-containing prymesiophytes (Phaeocystis spp.) was abundant in the study area. The flux rates of carotenoids were generally highest at 50 m, and approximately double the flux rates at deeper horizons, however, at Inner Bay sites, the mean flux rates of carotenoids were greatest at 200 m, and 3 times greater than that of 50 m. Such anomalous high fluxes at 200 m imply that grazers were locally abundant between 100 m and 200 m at these sites close to land, and this hypothesis is supported by visual evidence of lots of fecal pellets in the 200 m trap. Integrates standing stocks versus sinking pigments data support that particulate material in Prydz Bay was not recycled rapidly.

Abstract
 1. Introduction
 2. Materials and methods
  2.1. Field collections
  2.2. Description of sediment traps
  2.3. Collection depths and sample processing
  2.4. Sampling with CTD and Niskin bottles
  2.5. Analysis of carotenoid pigments
 3. Results
  3.1. Water column structure in Prydz Bay
  3.2. Carotenoid pigment composition of suspendedparticulate matter in Inner vs. Outer Prydz Bay
  3.3. Integrated standing stock of algal pigments insuspended matter
  3.4. Carotenoid composition of sinking particulatematter: Collections by floating sediment traps
 4. Discussion
  Phytoplankton Community Structure of the WaterColumn
  Carotenoid Pigments Distribution of the WaterColumn
  Carotenoids in Material Sinking Out of Prydz Bay
  Inventories of Suspended versus Sinking Materials
 References

• Il Noh(Division of Marine Environment & Bioscience, Korea Maritime University) Corresponding Author