The parasite faunas of juvenile English sole (Parophrys vetulus) in 1971–1972 and staghorn sculpin (Leptocottus armatus) in 1971 from Yaquina Bay, Oregon, were compared with faunas found in the same estuary in 1997–2000 (English sole) and 1999–2000 (staghorn sculpin). The 7 most commonly occurring parasites in 1971 were compared with the same species observed during the same month and sampling sites in 1997–2000. Multivariate community analysis of juvenile English sole parasites supported the suggestion that the 1971 parasite data were representative of the early-1970s time period. Four of the parasite species infecting English sole and 6 of those infecting staghorn sculpins had significantly lower prevalences in 1997– 2000. Parasite species with significantly lower prevalences also had reduced intensity levels. One parasite (Glugea stephani) of English sole increased in prevalence in the 1997–2000 samples in association with the warm estuarine temperatures during the 1997 El Niño year. Although the causes for the changes in occurrence of other parasites were not determined, ecological changes in Yaquina Bay that may have influenced parasite ecology include apparent changes in the estuary ichthyofauna that occurred between the sampling periods. Such changes could be associated with increases in the number of California sea lions (Zalophus californianus) subsequent to establishment of the Marine Mammal Protection Act in 1972.
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June 2004
LIFE CYCLES-SURVEY|
June 01 2004
TEMPORAL CHANGES IN THE PREVALENCE OF PARASITES IN TWO OREGON ESTUARY–DWELLING FISHES
Robert E. Olson;
Robert E. Olson
Department of Fisheries and Wildlife, Coastal Oregon Marine Experiment Station, Hatfield Marine Science Center, Oregon State University, Newport, Oregon 97365. robert.olson@oregonstate.edu
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Jack R. Pierce;
Jack R. Pierce
Department of Fisheries and Wildlife, Coastal Oregon Marine Experiment Station, Hatfield Marine Science Center, Oregon State University, Newport, Oregon 97365. robert.olson@oregonstate.edu
* Department of Biology, Austin College, Sherman, Texas 75090
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Kym C. Jacobson;
Kym C. Jacobson
Department of Fisheries and Wildlife, Coastal Oregon Marine Experiment Station, Hatfield Marine Science Center, Oregon State University, Newport, Oregon 97365. robert.olson@oregonstate.edu
† NOAA Fisheries, Northwest Fisheries Science Center, Hatfield Marine Science Center, Newport, Oregon 97365
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Eugene M. Burreson
Eugene M. Burreson
Department of Fisheries and Wildlife, Coastal Oregon Marine Experiment Station, Hatfield Marine Science Center, Oregon State University, Newport, Oregon 97365. robert.olson@oregonstate.edu
‡ Virginia Institute of Marine Science, School of Marine Science, College of William and Mary, Gloucester Point, Virginia 23062
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J Parasitol (2004) 90 (3): 564–571.
Citation
Robert E. Olson, Jack R. Pierce, Kym C. Jacobson, Eugene M. Burreson; TEMPORAL CHANGES IN THE PREVALENCE OF PARASITES IN TWO OREGON ESTUARY–DWELLING FISHES. J Parasitol 1 June 2004; 90 (3): 564–571. doi: https://doi.org/10.1645/GE-3057
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