Abstract
Five euphausiid species (n=41,037) were collected in October 1997 from Prince William Sound, Alaska, and examined for parasites. New locality records are claimed for third-stage larvae (L3) of whaleworm Anisakis simplex (sensu lato) in two (0.019%) of 10,437 Thysanoessa raschii, and in one (0.013%) of 7,443 Euphausia pacifica. The L3 were about 19.5, 21.3 and 30.5 mm long. L3 were absent from 8,026 T. inermis, 10,302 T. longipes and 4,829 T. spinifera collected at the same time, and from 6,648 euphausiids representing the five species collected in July 1998. No individual harboured more than one parasite—a whaleworm L3, the ellobiopsid Thalassomyces fagei, a trypanorhynchid (tetrarhynchid) cestode (probably Nybelinia sp.), or a possible rhizocephalan. Controversy regarding the number of moults that occur in the egg of marine ascaridoids is discussed briefly.
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Acknowledgements
The writers are most grateful to Professor Thomas C. Shirley for his varied help, not least for supervising JMS’s Master’s Thesis. Research funding from the Exxon Valdez Oil Spill Trustee Council supported euphausiid collections as part of Forage Species Studies in PWS, Project 163A.
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Smith, J.W., Snyder, J.M. New locality records for third-stage larvae of Anisakis simplex (sensu lato) (Nematoda: Ascaridoidea) in euphausiids Euphausia pacifica and Thysanoessa raschii from Prince William Sound, Alaska. Parasitol Res 97, 539–542 (2005). https://doi.org/10.1007/s00436-005-1471-y
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DOI: https://doi.org/10.1007/s00436-005-1471-y