In:
Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 52, No. 2 ( 1995-02-01), p. 276-282
Abstract:
Lamprey ammocoetes were determined to be as suitable as adult bivalve molluscs for monitoring persistent organochlorine contaminants in the freshwater environment. Ammocoetes of four lamprey species and adults of three bivalve mollusc species, collected from the same seven rivers of the St. Lawrence River basin in Québec, were assayed for 21 organochlorine pesticides and for polychlorinated biphenyl (PCB) congeners. All organochlorine compounds assayed were detected in one or more of the 15 lamprey samples whereas Aldrin, β-BHC, and PCB congeners 1, 3, 12(13), 29, 54, 189, 191, and 199 were not detected in any of the nine bivalve samples. Nine pesticides (Aldrin, Dieldrin, γ-BHC, α-Chlordane, γ-Chlordane, o,p′-DDD, p,p′-DDD, p,p′-DDT, and a-Endosulfan) had higher concentrations in the lampreys. PCB congeners 167(185) and 209 had higher concentrations in bivalves. PCBs accounted for 96.6–99.4% of the organochlorine lipid burden in bivalves, but only 33.4–76.8% in lampreys. On average, ammocoetes had 44 times more lipids per body dry weight than did bivalves. The differences observed in concentrations and types of organochlorine compounds found in the two taxa may be due to differences in the amounts (observed) and types (postulated) of body lipids they each possess.
Type of Medium:
Online Resource
ISSN:
0706-652X
,
1205-7533
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1995
detail.hit.zdb_id:
7966-2
detail.hit.zdb_id:
1473089-3
SSG:
21,3
SSG:
12
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