Fig. 3
Semi-quantitative histological examination of the glycogen amount in the liver of brown trout larvae exposed to metformin at 7 °C and 11 °C categorised in low, medium and high glycogen contents (Likelihood-Ratio χ2 test: 7 °C: p = 0.5211; 11 °C: p = 0.3769). The number n of examined fish individuals is indicated in the bars