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January 1, 1998

The identification and characteristics of Echinoparyphium rubrum (Cort. 1914) new comb. (Trematoda, Echinostomatidae) based on experimental evidence of the life cycle

The life cycle of Echinoparyphium rubrum (Cort, 1914) comb. n. has been completed experimentally. All of the developmental stages egg, miracidium, sporocyst, mother and daughter rediae, cercaria, metacercaria, and adult were examined and described. The miracidia infected freshwater snails of the genus Physa , P. gyrina and P. occidentalis. Attempts to infect snails of the genera Lymnaea, L. auricu

Authors

I. Kanev, R. Sorensen, M. Sterner, Rebecca A. Cole, B. Fried

Ecosystems Mission Area, National Wildlife Health Center

January 1, 1998

Lead poisoning and trace elements in common eiders Somateria mollissima from Finland

We collected carcasses of 52 common eider Somateria mollissima adults and ducklings and blood samples from 11 nesting eider hens in the Gulf of Finland near Helsinki in 1994, 1995 and 1996. Samples of liver tissue were analysed for arsenic, cadmium, chromium, copper, iron, lead, magnesium, manganese, mercury, molybdenum, selenium and zinc. Blood was analysed for lead, mercury and selenium. Most of

Authors

Tuula E. Hollmén, J. C. Franson, R.H. Poppenga, Martti Hario, Mikael Kilpi

Ecosystems Mission Area, National Wildlife Health Center

January 1, 1998

The inhibition of Clostridium botulinum type C by other bacteria in wetland sediments

Bacteria with inhibitory activity against Clostridium botulinum type C were isolated from 32% of sediment samples (n = 1600) collected from 10 marshes in a northern California wetland over a 12 mo period. Aerobic and anaerobic bacteria with inhibitory activity were isolated from 12% and 23% of the samples, respectively. Bacteria with inhibitory activity were isolated from all 10 study sites and th

Authors

Renee J. Sandler, Tonie E. Rocke, Thomas M. Yuill

Ecosystems Mission Area, National Wildlife Health Center

January 1, 1998

An epizootic of common loons in coastal waters of North Carolina: Concentrations of elemental contaminants and results of necropsies

A 1993 die-off of common loons (Gavia immer) in the coastal waters of North Carolina was investigated with emphasis on comparing mercury, selenium, arsenic, and lead between birds from the epizootic and reference specimens. Die-off specimens were emaciated but contained no ingested foreign bodies and no lesions suggestive of infectious disease. Results of bacteriology, virology, parasitology, and

Authors

Tom Augspurger, J. Christian Franson, Kathryn A. Converse, P. Spitzer, E.A. Miller

Ecosystems Mission Area, National Wildlife Health Center

January 1, 1998

Leucocytozoon simondi in emperor geese from the Yukon-Kuskokwim delta in Alaska

We surveyed Emperor Geese (Chen canagica) in western Alaska for avian hematozoa. Blood smears were collected from 134 adults and goslings in late July 1996, on their breeding grounds on the Yukon-Kuskokwim Delta. One of 134 (0.7%) Emperor Geese harbored Leucocytozoon simondi, representing a new host record for this parasite. No other hematozoa were detected. This is one of few reports of avian blo

Authors

Tuula E. Hollmén, J. Christian Franson, L. H. Creekmore, Joel A. Schmutz, A. C. Fowler

Ecosystems Mission Area, National Wildlife Health Center

January 1, 1998

Blood lead concentrations of spectacled eiders near the Kashunuk River, Yukon Delta National Wildlife Refuge, Alaska

We collected, 342 blood samples from spectacled eiders (Somateria fischeri) on their breeding grounds in western Alaska from late May through to early August 1993–1995. Lead concentrations of ≥0.50 p.p.m. wet weight were found in the blood of 20% of the adult female eiders, 2% of the adult males and 6% of the ducklings. Lead was detected (≥0.02 p.p.m.) more frequently in the blood of adult females

Authors

J. Christian Franson, Margaret R. Petersen, Lynn H. Creekmore, Paul L. Flint, Milton R. Smith

Ecosystems Mission Area, National Wildlife Health Center, Alaska Science Center

January 1, 1998