Comment on Evolution of Growth in Gulf of St Lawrence Cod
Author Information
Author(s): Heino Mikko, Baulier Loïc, Boukal David S, Dunlop Erin S, Eliassen Sigrunn, Enberg Katja, Jørgensen Christian, Varpe Øystein
Primary Institution: Institute of Marine Research
Hypothesis
Does fishing lead to slower growth in Gulf of St Lawrence cod due to size-selective capture?
Conclusion
The study suggests that while there may be changes in length-at-age, the evidence for evolutionary responses to fishing is inconclusive.
Supporting Evidence
- The study critiques the assumptions made in the original research on cod growth.
- It highlights the importance of considering reproductive investment when analyzing length-at-age.
- The authors found that including an intercept in the regression model changed the significance of key variables.
Takeaway
Fishing might make fish grow slower, but we can't be sure because other factors could be affecting their growth too.
Methodology
The authors critiqued a study's regression models and assumptions regarding growth in cod.
Potential Biases
Potential biases arise from unaccounted environmental trends and observation errors.
Limitations
The analysis relies on model-derived quantities and may not account for all environmental factors affecting growth.
Statistical Information
P-Value
0.03
Statistical Significance
p=0.03
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