Accession Number:

ADA172985

Title:

Effects of Tributyltin Antifouling Paint Leachates on Pearl Harbor Organisms. Site-Specific Flowthrough Bioassay Tests.

Descriptive Note:

Final rept. 1983-1985,

Corporate Author:

NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s):

Report Date:

1985-12-01

Pagination or Media Count:

31.0

Abstract:

Site-specific bioassay studies were performed to evaluate the effects of tributyltin TBT antifouling paint leachates on complex communities of organisms. Test communities were maintained in flowthrough seawater tanks at Ford Island, Pearl Harbor, Hawaii, and were composed of about 30 common fouling invertebrates attached to panels and tank surfaces, American oysters, swimming crabs, glass shrimp, and feather-duster worms. Organisms were exposed to five treatment levels ranging form 0.04- to 2.5-microgramsL TBT. Organisms that exhibited no visible stress responses to all levels of TBT were swimming crabs, glass shrimp, the anemone Haliplanella luciae, and all genera of algae encountered in the tanks. The American oyster Crassostrea virginica experienced sublethal effects reduced condition index from organotin leachates at 0.1-microgramsL TBT and high morality at 2.5 microgramsL. Substantial declined in numbers of species and lowered species diversity were observed on fouling panels and surfaces exposed to 0.5 microgramsL TBT. No significant effects were noted at 0.04 microgramsL. Tolerance of some species of nuisance foulers, such as tube worms and solitary tunicates, to moderate-to-high concentrations of TBT suggests that areas affected by significant amounts of organotins should be closely monitored for possible shifts in dominance of specific organisms. Keywords Benthic organisms, harbor pollutants.

Subject Categories:

  • Toxicology
  • Biological Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE