Distribution of calcium in fish and marine invertebrate muscles.

The calcium contents of 21 species of fish and nine species of marine inver tebrate muscles were determined by atomic absorption spectroscopy. The resu lts are summarized as follows: The calcium contents in fish ordinary muscle s and invertebrate muscles were 2.2-39.0 and 5.9-45.5 mg/100 g, respectivel y. The contents in white muscles were higher than those in reddish muscles. The calcium contents in muscles of small-sized fishes were higher than tho se in the muscles of lager-sized fishes. The contents of water soluble frac tion were higher than those of water insoluble fraction except in common ma ckerel, skipjack, albacore and blue shark. In fish muscle containing high-l evel calcium, a high Ca2+-binding protein content was found in water solubl e fraction. However, these correlations mere not observed in marine inverte brate muscles.