Differential parasitism by Naobranchia occidentalis and Nectobrachia indivisa on northern rock sole and southern rock sole in Alaskan waters - Copepoda: Naobranchiidae - Copepoda: Lernaeopodidae - Lepidopsetta polyxystra Orr and Matarese, 2000 - L. bilineata Ayres, 1855 - Statistical Data Included

Fishery Bulletin, April, 2001 by Mark Zimmermann, Robin C. Harrison, Anthony F. Jones

Acknowledgments

The laboratory research of this project was performed by A. Jones, as an internship in partial fulfillment of a Bachelor of Science degree from Western Washington University. Steve Syrjala provided statistical advice. Jay Orr taught A. Jones the subtle differences between the rock sole species and how to identify the structures of interest. Discussions with Frank Morado improved our laboratory methods and manuscript. Comments and suggestions from several coworkers greatly improved the quality of this manuscript and an anonymous reviewer provided helpful criticism of the manuscript. We thank Frank Roubal for sharing additional results from his studies and for hypothesizing on the infection dynamics of Naobranchia. Teresa Turk, Steven Hochberg, Michelle Armstrong, Dick Haight, and Ben Page examined fish out at sea for parasites. We are extremely grateful to Z. Kabata for examining samples of all four copepod parasites and confirming our species identifications.

(1) Kabata, Z. 1998. Personal commun. Department of Fisheries and Oceans, Pacific Biological Station, Nanaimo, British Columbia, Canada, V9R 5K6. Kabata suggested that we consider this incidence of parasitism by A. vancouverensis to be the first record of parasitism in wild rock sole by this species. A former record of parasitism by this species was for aquarium fish only.

(2) Kabata, Z. 1998. Personal Commun. Department of Fisheries and Oceans, Pacific Biological Station, Nanaimo, British Columbia, Canada, V9R 5K6. Kabata confirmed our tentative identification of Haemobaphes and identified it with fair certainty as H. diceraus.

(3) Roubal, F.R. 1999. Personal commun. Department of Parasitology, The University of Queensland, Brisbane 4072, Queensland, Australia.

Literature cited

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