Significance of the Food Chain in DDT Accumulation by Fish
01 Aug 1970-Wsq: Women's Studies Quarterly (NRC Research Press Ottawa, Canada)-Vol. 27, Iss: 8, pp 1496-1498
TL;DR: In this article, it was shown that Brook trout accumulated approximately 10 times more of the available DDT from the food than directly from the water, since, in aquatic environments, the concentration of DDT is usually much higher.
Abstract: Brook trout accumulated approximately 10 times more of the available DDT from the food than directly from the water. Since, in aquatic environments, the concentration of DDT is usually much higher ...
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TL;DR: An empirical model capable of predicting PCB levels in pelagic salmonids and forage fish (smelt and coregonids) indicated that biomagnification of small atmospheric inputs of p...
Abstract: The trophic structure of pelagic communities in lakes of glaciated regions is highly variable due to restricted dispersal of glacial relict taxa and recent species introductions. Much of the enormo...
299 citations
TL;DR: The trophic structure of pelagic communities in glaciated regions is highly variable due to restricted dispersal of glacial relict taxa and recent species introduction.
Abstract: The trophic structure of pelagic communities in glaciated regions is highly variable due to restricted dispersal of glacial relict taxa and recent species introduction. Much of the between-lake var...
274 citations
TL;DR: In this paper, a review summarizes information obtained from published literature to determine to what degree biomagnification of organic compounds and metals occurs in freshwater and marine food webs, concluding that the majority of chemicals evaluated (both organic and metals) do not biomagnify in aquatic food webs.
Abstract: This review summarizes information obtained from published literature to determine to what degree biomagnification of organic compounds and metals occurs in freshwater and marine food webs. This review was conducted by: (1) examining data from studies conducted in laboratory experiments to establish body burden ratios between trophic levels (trophic transfer coefficients; TTCs); (2) comparing laboratory-derived TTCs with data obtained from field studies; and (3) comparing biomagnification predictions described by published aquatic food-web models with data obtained in this review. It was determined that: (1) the majority of chemicals evaluated (both organic and metals) do not biomagnify in aquatic food webs; (2) for many of the compounds examined, considerable trophic transfer does occur in aquatic food webs; (3) DDT, DDE, PCBs, toxaphene, methyl mercury, total mercury, and arsenic have the potential to biomagnify in aquatic systems; (4) the lipid fraction of receptors directly influences biomagnification of lipophilic compounds; (5) the food web model reviewed provided similar estimates for most of the organic compounds examined (log Kow values between 5 and 7), with model predictions falling within the range of values of all compounds except dieldrin; (6) for many organic compounds, lack of information precludes assessing the relative importance of biomagnification for these contaminants; and (7) even those compounds for which evidence for biomagnification is strongest show considerable variability and uncertainty regarding the magnitude and existence of food-web biomagnification in aquatic systems.
231 citations
TL;DR: In this article, the authors used fish bioconcentration factors (BCF) for the prediction of the environmental effects of new chemicals and some studies have proposed that they can be predicted from physico-chemical properties of the chemical.
142 citations
TL;DR: It is concluded that the use of any biological organism to elucidate the comparative pollution of different locations by organochlorines, or even to monitor changes in the availableOrganochlorine concentration at any one location with time, is open to criticism.
93 citations