Abstract
AbstractThe present study describes a fast contracting, fatigue resistant, highly oxidative muscle found in the mouth parts of decapod crustaceans. The muscle studied was isolated from the blue crab, Callinectes sapidus. Histochemical techniques modified from those commonly used in mammalian striated muscle fiber typing were used to facilitate comparison of this fast‐oxidative muscle with other crustacean muscle. Comparison was made between this muscle and the slower cheliped opener muscle and the levator muscle of the fifth periopod. Differences in both SDH activity and myofibrillar ATPase activity between these muscles are described. The advantages and the difficulties involved in interpreting the histochemical reactions of various crustacean muscle fibers are also reviewed.
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