Long-term decline of whitefish (Coregonus lavaretus) population in the boreal lake Pyhäjärvi, southwest Finland, relative to simultaneous abiotic and biotic changes

Special issue - Biology and Management of Coregonid Fishes - 2023

Open Access

Fig. 4

Reproductive indices of whitefish in Pyhäjärvi in 1995–2004: (A) egg dry mass, (B) gonadosomatic index GSI%, (C) numerical fecundity, (D) eggs per gram female mass (relative fecundity), (E) water content (%). Significant regressions against year shown with dotted lines, and the 95% confidence intervals with broken lines.

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