Record Display for the EPA National Library Catalog


Main Title Increased Susceptibility to No. 2 Fuel Oil Coincident with Initiation of Particle Feeding in Developing Mud Snails, 'Ilyanassa obsoleta'.
Author Pechenik, J. A. ; Miller, D. C. ;
CORP Author Environmental Research Lab., Narragansett, RI. ;Tufts Univ., Medford, MA.
Year Published 1983
Report Number ERLN-240 ;EPA-600/J-82-158;
Stock Number PB84-144351
Additional Subjects Fuel oil ; Toxicology ; Exposure ; Concentration(Composition) ; Larvae ; Snails ; Reprints ; Water pollution effects(Animals) ; Ilyanassa obsoleta
Library Call Number Additional Info Location Last
NTIS  PB84-144351 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Encapsulated embryos and free-living larvae of Ilyanassa obsoleta were exposed to concentrations of No. 2 fuel oil (water-accommodated fraction, WAF) up to 1.0 ppm. Development of velum pigmentation and release of larvae from egg capsules were delayed in the presence of 1.0 ppm WAF, but exposure to the oil did not increase developmental mortality of encapsulated individuals. Individuals which were prematurely removed from egg capsules and exposed to oil directly suffered no mortality until yolk reserves were depleted and feeding on phytoplankton commenced. Feeding, free-living larvae suffer high mortality at 1.0 ppm WAF. The reduced susceptibility of encapsulated embryos to the oil stress may therefore reflect the importance of toxicant uptake by ingestion (as opposed to diffusion) rather than the degree of protection afforded by encapsulation.