Fig. 10

Schematic illustration of underlying physiological mechanisms regulating erythropoiesis in fishes in response to physiological hypoxia: Figure illustrating the overall mechanism of aquatic adaptation in response to hypoxic stress through the increased differentiation of the erythropoietic cell lineage starting from the SLH to ME that are eventually released into the blood circulation (in response to a high oxygen demand that forms a characteristic feature of hill stream environment).