PCB and p,p′-DDE in Lake Geneva brown trout (Salmo truttaL.), and their use as bioenergetic indicators
✍ Scribed by A. Devaux; G. Monod
- Book ID
- 104754158
- Publisher
- Springer
- Year
- 1987
- Tongue
- English
- Weight
- 470 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0167-6369
No coin nor oath required. For personal study only.
✦ Synopsis
Gross growth efficiency of Lake Geneva brown trout (Salmo trutta) was estimated by monitoring age-related PCB and p,p'-DDE accumulation, food contamination and annual growth.
Estimation was carried out using 3-, 4-, and 5-yr old fish. Roach (Rutilus rutilus) were determined as the main component of trout diet. Estimated growth efficiency coefficients were 0.4 (3-4 yr old fish) and 0.17 (4-5 yr old fish). Nevertheless numerous parameters can affect the result; their respective influences are discussed.
Related to fish age, PCB and p,p'-DDE concentrations increase if expressed on a wet weight basis, but not if expressed on a lipid weight basis.
At the same age, organochlorine residue concentrations keep similar values for trout and roach in spite of different trophic levels. Growth must be considered as a more dilution factor of PCB and p,p'-DDE in trout compared with roach. * French products with similar gas chromatographic pattern than Aroclors 1260 and 1254 respectively (Aroclors are often used as standards).