HISTOCHEMICAL PROPERTIES OF MYOFIBERS IN LONGISSIMUS MUSCLE OF COMMON DOLPHINS (DELPHINUS DELPHIS)
1983 年 16 巻 3 号 p. 223-231
詳細
1983 年 16 巻 3 号 p. 223-231
The longissimus muscle of common dolphins (Delphinus delphis) was examined by histochemical methods. The longissimus muscle had two types of myofibers: types I and II. Type I myofibers possessed strong acid-stable myosin adenosine triphosphatase (ATPase) and weak alkali-stable ATPase activity, very strong activity of NADH: Nitro BT oxidoreductase (NADHOX), and strong activity of sn-glycerol-3-phosphate: menadione oxidoreductase (GPOX). Type II myofibers possessed weak acid-stable ATPase and strong alkali-stable ATPase activity, moderately strong activity of NADHOX, and very strong activity of GPOX. The activity of 3-hydroxybutyrate: NAD+ oxidoreductase was very weak in type I and II myofibers. Type I myofibers represented about one-half the percentage of total myofibers. They contained a few fine granules of lipid pigments. The intensity of the oxidoreductase activity in the myofibers indicates that dolphin longissimus muscles possess a great capacity for oxidative and glycolytic metabolism.
