Histochemical characterization of the muscle fiber types of the Teleost (Esox lucius L.).

On the base of the actomyosin ATP-ase activity and succinate dehydrogenase (SDH) activity, 4 types of muscle fibers were described in the pike (Esox lucius L.) body musculature. Besides the typical red, intermediate, and white fibers, probably other fibers discerned were of tonic type. Another fibers found were the intermediate fibers of a characteristic small diameter and localization beyond the intermediate fiber zone. This particular construction of the body musculature is characteristic for darting behaviour fish.