La. Cruz-rodriguez et al., Effects of PCBs sorbed to algal paste and sediments on the stress protein response (HSP70 family) in the eastern oyster, Crassostrea virginica, MAR ENV RES, 50(1-5), 2000, pp. 341-345
This study examined the stress protein response (HSP70 family) of reproduct
ively inactive oysters fed 0.7 g algal paste containing 0, 0.35 and 3.5 (g
mu) polychlorinated biphenyls (PCBs) daily. A second set of treatment group
s investigated the combined effect of PCBs and sediments (0.3 g sediments d
aily per oyster) on HSP70 response. After 8 weeks of PCB exposure, oyster t
issues (mantle and gill) were sampled and analyzed for HSP70. Preliminary r
esults did not show a significant effect in HSP70 response in oysters fed P
CB sorbed to algal paste, albeit PCBs accumulated up to 1342 ng/g dry weigh
t in the mantle, and up to 180 ng/g dry weight in gill tissues. However, th
e addition of sediments caused a significant increase in HSP70 levels of gi
lls and mantle, although the mantle was less sensitive to the sediments. (C
) 2000 Elsevier Science Ltd. All rights reserved.