Measurement / residue studycited by the Tayebat archiveabstract only checked A-FSH-08 standard review
Dioxins in Scottish farmed salmon (1999)
Investigation of polychlorinated dibenzo-p-dioxins, dibenzo-p-furans and selected coplanar biphenyls in Scottish farmed Atlantic salmon (Salmo salar).
Overview
Jacobs M et al.. Chemosphere 2002 · PMID 11993634 · DOI 10.1016/s0045-6535(01)00201-6
Farmed Scottish salmon had relatively high dioxins/PCBs in 1999.
Does the study support the specific claim? Partly · Methodological quality: low
Plain-language summary
Study explained simply
- What did the researchers want to find out?
Measure dioxins.
- How was the study done?
Lab analysis.
- How many people, animals or samples were studied?
Scottish salmon.
- What was actually found?
Relatively high PCBs.
- What do the results mean in everyday life?
Historic.
- What are the study's limitations?
1999 data.
- What does it say about Elawady's specific claim?
Historical support.
- Do the results apply to Germany and Europe?
Low.
- What can explicitly not be concluded from this study?
Current risk.
Scientific in-depth review
1. Full reference
- Authors
- Jacobs M, Ferrario J, Byrne C
- Journal
- Chemosphere
- Year
- 2002
- Identifier
- PMID 11993634 DOI 10.1016/s0045-6535(01)00201-6
- Verification
- verified – PubMed E-utilities efetch, 2026-10-25
- Retracted
- no
- Corrections
- none
- Extent checked
- abstract only
- Conflicts of interest and funding
not stated in abstract/record
2. Research question
Levels of dioxins/PCBs in Scottish farmed salmon?
3. Study design and population
- Study design
- Measurement / residue study – Measurement of PCDD/Fs and coplanar PCBs in Scottish farmed and wild salmon (1999)
- Population
Farmed and wild Scottish Atlantic salmon
- Country
UK (Scotland)
- Period
January 1999
- Sample size
not stated in abstract
4. Methods and endpoints
- Exposure / intervention
Farmed
- Comparator
Wild
- Endpoints
PCDD/F, PCB concentrations; intake vs TDI/TWI
- Statistical methods
not stated
5. Actual results
- Results
Relatively high PCDD/Fs and especially PCBs in farmed salmon; high consumption, particularly by children under 5, could exceed TDI/TWI combined with UK diet.
- Absolute risks
not reported
- Authors' conclusion
Further investigation of feed (fish oil vs vegetable oil) warranted.
6. Strengths
- Early signal
7. Weaknesses
- Small, 1999, single region
8. Risk of bias
- Orienting tool
- none applicable
- Type of assessment
- simplified assessment (abstract only)
- Full formal assessment
- no
- Overall risk of bias
- some concerns
9. Assessment of the statistical interpretation
10. Relevance to the specific claim
11. Independent contrary findings
12. Transferability to Germany and Europe
Low.
13. Overall methodological judgement
Historical.
| Multidimensional assessment | |
|---|---|
| Authenticity of the source | verified |
| Methodological quality | low |
| Risk of bias | some concerns |
| Precision of results | low |
| Directness | direct |
| Reproducibility | partly replicated |
| Consistency with the overall evidence | consistent |
| Regional transferability | low |
| Adequacy of the interpretation (by the archive) | essentially correct but incomplete |
14. Open questions
15. Linked fact checks
Use by the Tayebat archive
Note: according to the archive, the studies were compiled by the archive operators. Whether Dr. Elawady himself cited this study is not established.
- What the archive says about the study
Bibliography only.
- A. What was actually studied?
Scottish salmon dioxins.
- B. What did the authors find?
Relatively high levels.
- C. What conclusions do the authors themselves draw?
Investigate feed.
- D. What does the archive derive from it?
Part of contamination narrative.
- E. Is this derivation scientifically justified?
Accurate for 1999.
- Adequacy of the interpretation (by the archive)
- essentially correct but incomplete