Oil and Krill: From Lab to Nature

by Paul A. Fishman, Fishman Environmental Services, Portland, OR, USA,
Richard S. Caldwell, Fishman Environmental Services, Portland, OR, USA,

Document Type: Proceeding Paper

Part of: Coastal Zone '87


Bioassay tests were conducted on Arctic krill, the euphausiid Thysanoessa raschii, using water-soluble fractions of Prudhoe Bay, Alaska crude oil. Experimental results indicated that larval krill are less sensitive to oil fractions than other life stages, and gravid females are most sensitive. The oil concentrations that did result in mortalities were fairly high, and also resulted in longer intermolt periods for adult animals. Results of lab tests were used to estimate effects of an oil spill scenario on natural populations in the Alaskan Beaufort Sea. Effects were estimated to be negligible, given the scenario parameters.

Subject Headings: Water pollution | Wildlife | Fish management | Bays | Lifeline systems | Women | Animals | Laboratory tests | Beaufort Sea | Arctic | Alaska | United States

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