Connelly, D. P.. Bermuda Biological Station for Research Inc., doug@sargasso.bbsr.edu
Sarkis, S. P.. Bermuda Biological Station for Research Inc., ssarkis@sargasso.bbsr.edu

 
COMPARISON OF TRACE METAL AND PCB ACCUMULATION IN THE TURKEY-WING MUSSEL, ARCA ZEBRA, IN THREE OF BERMUDA'S INSHORE WATER SITES.
 
The effect of two man-made pollution point sources was determined with respect to trace metal and PCB accumulation in the turkey-wing mussel, Arca zebra, in Bermuda. Adult mussels were collected from Harrington Sound, Bermuda, by SCUBA. Animals were measured, weighed and subdivided into two lots of 120. Mussels were subsequently placed on February 19, 1997, in 2.5cm semi-rigid polyethylene pouches, and were suspended on a longline, 1 metre from the bottom, at two different sites in Castle Harbour. Site A, known as Blue Hole Hill, is situated approximately 300 yards from a dumpsite; whereas Site B, known as Cooper's Island, is in proximity to a known land-base pollution source. A sub-sample of 20 animals was collected at 1month, 3months, 6 months and 12months interval, from Site A, site B and from the control site (Harrington Sound). Hinge length, total weight and empty shell weight were recorded for all individuals collected. Tissues from 15 animals were freeze-dried and stored at -70 C awaiting further analyses for PCB levels and total lipid levels. The remaining 5 animals were freeze-dried in the shell and extracted for determination of trace metals. At time of mussel sampling, surface temperatures were recorded, and sediment samples were collected for analysis of trace metal levels. Trace metals ( Pd, Cu, Cd, Mn, and Ni) were analysed using a Graphite Furnace AAS; PCB were analysed by gas chromatography with verification by GCMS. Total lipid was determined using a modified version of the sulphuric-acid charring method described by Marsh & Weinstein (1966). Comparisons for both trace metals and PCB concentrations in turkey-wing mussel tissues were performed among sites for 4 specific time periods; accumulation of trace metals and PCB in A. zebra tissues were also determined over a 12-month period for each site. The impact of the existing two point sources was discussed with respect to trace metal and PCB accumulation in A. zebra.
 
Day: Wednesday, Feb. 3
Time: Poster
Location: Sweeney Center
 
Code: SS28WE0715S