Dietary uptake efficiency of 2,2', 4,4', 5,5'-hexachlorobiphenyl in yellow perch and rainbow trout : Role of dietary and body lipids

• Published in: Environmental toxicology and chemistry Vol. 18; no. 5; pp. 938 - 945
• Main Authors: DABROWSKA, H, FISHER, S. W, DABROWSKI, K, STAUBUS, A. E
• Format: Journal Article
• Language: English
• Published: Pensacola, FL SETAC 01.05.1999
• Subjects: Agnatha. Pisces; Animal, plant and microbial ecology; Applied ecology; Biological and medical sciences; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Freshwater; Fundamental and applied biological sciences. Psychology; hexachlorobiphenyl; Oncorhynchus mykiss; Perca flavescens; Ohio; United States; North America; America; Salmonidae; Elimination; Lipids; Oncorhynchus mykiss; Polychlorobiphenyl; Young animal; Freshwater environment; Pollutant; Vertebrata; Absorption; Diet; Pisces; Water pollution; Pollutant effect; Biological accumulation; Perca flavescens
• ISSN: 0730-7268; 1552-8618
• DOI: 10.1897/1551-5028(1999)018<0938:DUEOHI>2.3.CO;2

Dietary uptake efficiency (alpha) and elimination rate constants (kd) of 2,2',4,4',5,5'-hexachlorobiphenyl (HCBP) were determined in juvenile yellow perch (Perca flavescens) and rainbow trout (Salmo gairdneri), to investigate the influence of dietary and body lipid levels on bioaccumulation. Low-fat (LF) or high-fat (HF) diets, spiked with 5 or 50 ppb carbon-14 labelled HCBP for 32 d gave alpha values ranging between 74-95 per cent and 79-99 per cent for perch and trout, respectively. Greater alpha values were at 5 ppb HCBP concentration. Uptake of HCBP was dependent by both diet and body lipids and the status of both lipid pools. Elimination rate constants ranged between 0.000-0.004 per d in perch and 0.003-0.010 per d in trout. No significant differences were observed between LF and HF diets. Lipid/time interactions in the LF and HF fish groups, when undergoing a change in lipid regime, gave kd values, like the alpha values, which were influenced by both lipid pools. Fish on constant diet lipids gave kd values for HF below those for LF fish. In changed lipid regimes, the kd tended to be greater. Bioaccumulation factor (BAF) values ranged from 1.11-2.49 in perch and 1.5-4.3 in trout. Changes in elimination rates due to dietary /body lipid status impacted BAF more strongly than changes in uptake efficiencies. There are 34 references.