Figure 5 from: Pandakov PG, Teofilova TM, Kodzhabashev ND (2020) Status of the burbot (Lota lota L.) in the Lower Danube (Bulgaria) – a species threatened by climate change. ZooKeys 910: 143-161. https://doi.org/10.3897/zookeys.910.47866

Figure 5 Age composition (in %) of all collected burbot (left) and for each season separate (right). On the left diagram, the upper value is the age category and lower value is the percentage of this category in total number of fish.