Oxygen regime of skeletal muscles in teleost fishes and mechanisms of its functional correction (an overview)

The data on oxygen tensions and diffusing capacity in skeletal muscles of teleost fishes are summarized. The techniques of these traits registration and calculation are compared. It is pointed out that diffusion of oxygen in skeletal muscles of teleost fishes is a more complex process than in amniotes. This process is supposed to be restrained by the membrane structures of muscle tissue cells. Special attention is paid to oxygen tensions in arterial and venous blood, and mechanisms of their functional correction. It is shown that the processes mentioned are governed by humoral and neural control of gill blood flow along with respiratory and cardiac activity. The contribution of receptors, sensitive to oxygen and CO2, to these functions regulation is discussed.