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H.-D. ]ANKOWSKY
of the fish. These observations together with the present results indicate
that the red fibres have a tonic function. WITTEN BERGER'S [6] investigations
suggest that in the red muscles substances are metabolized which are
produced in the white muscle as a result of anaerobic metabolism. The high
mitochondria content and the good vascularisation of these fibres agree
with this concept.
References
1. BARETS, A.: Arch. Anat. Micr. Morph. Exp. 50,91 (1961).
2. ]ANKOWSKY, D., U. H. KORN: Naturwissenschaften 52, 642 (1965).
3. KROMPECHER, S., et al.: Acta BioI. Hung. 16, 389 (1966).
4. PROSSER, c., et al.: Naturwissenschaften 52, 168 (1965).
5. SCHULTZE, D.: Z. wiss. Zool. 172, 104 (1965).
6. WITTENBERGER, c.: Rev. Roum. BioI. (Zool.) 12, 139 (1967).
Discussion
GRAINGER:
Have you done any experiment on isolated red muscle kept in organ culture
at different temperatures?
]ANKOWSKY:
No, we have not carried out such experiments, but we soon plan to start with
experiments on cultured leucocytes of fish.
KRUGER:
Did you measure the 02-consumption of red and white muscles?
]ANKOWSKY:
The red muscle can in vitro consume more than nine times more oxygen than
the white muscle.