. The Canadian field-naturalist. 1999 Wakelyn, Shank, Elkin, and Dragon: Contaminant Levels in Ptarmigans 217. Figure 1. Locations of the Anderson River Delta and Kittigazuit Bay study areas in the Northwest Territories. pie. No analysis was conducted to assess differences between sites because of the small sample sizes involved. Results The levels of contaminants in the ptarmigan eggs were all very low (Table 1). All contaminants for which tests were conducted were below detection limits in the initial analysis of 17 eggs in 1989 (data not shown). Because of these initial results the remainde
. The Canadian field-naturalist. 1999 Wakelyn, Shank, Elkin, and Dragon: Contaminant Levels in Ptarmigans 217. Figure 1. Locations of the Anderson River Delta and Kittigazuit Bay study areas in the Northwest Territories. pie. No analysis was conducted to assess differences between sites because of the small sample sizes involved. Results The levels of contaminants in the ptarmigan eggs were all very low (Table 1). All contaminants for which tests were conducted were below detection limits in the initial analysis of 17 eggs in 1989 (data not shown). Because of these initial results the remainder of the eggs collected were placed in a tis- sue bank and were not tested. The level of contaminants as determined by the tissue analyses were low, , generally < ng/g wet weight. The organochlorines detected in the muscle tissue were pentachlorobenzene (QCB), a- HCH, and y-HCH (Table 1). These compounds were also detected in the liver tissues in addition to six other compounds; octachlorostyrene (OCS), trans- Chlordane, trans-Nonachlor, p,pi-DDE, heptachlor epoxide (HC Epox) and PCB #66/95. The concentra- tions of all detected contaminants were higher in liver tissue than in muscle tissue. The predominant contaminant at both study sites was p,pi-DDE, with a mean concentration of ng/g wet weight in liver. This contaminant was found in six out of seven livers sampled, with levels ranging from to ng/g. Contaminants from the HCH group had the second highest concentration in liver tissue with a total mean concentration of ng/g. Alpha-hexachlorocyclohexane and y-HCH were detected in six of the seven liver samples with a net range of to ng/g; the maximum being the highest contaminant level detected in any one liver. Beta-hexachlorocyclohexane was not detected in any samples. XHCH also had the highest concentration detected in the muscle tissue at ng/g. The chlor- dane (CHL) group of contaminants had a net mean of ng/g in the liver
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