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Acid and alkaline phosphatases in the lymphomyeloid tissues of elasmobranch fish

Published online by Cambridge University Press:  11 May 2009

Ragnar Fänge
Ragnar Fänge
Affiliation:
Department of Zoophysiology, Universityof Göteborg, Sweden
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Extract

Activities of phosphomonoesterases were measured at acid and at alkaline reaction (pH 4–5 or 9–65) in homogenates of elasmobranch tissues especially lymphomyeloid structures. The animals were dogfish (Scyliorhinus caniculd) and two species of ray (Raja brachyura, R. naevus). Acid phosphatase activity was high in the epigonal tissue, Leydig's organ, the spleen and the thymus. High activity was also found in the pancreas and the kidney, whereas skeletal and cardiac muscle showed low values. The activity of alkaline phosphatase was very high in the kidney and relatively low in other tissues. Ultrasonification of homogenates from the dogfish resulted in increase of acid phosphatase activity but had little effect on alkaline phosphatase activity. The high activity of acid phosphatase in lymphomyeloid tissue may be due to the presence of large numbers of various types of leucocytes.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 58 , Issue 3 , August 1978 , pp. 727 - 730
Copyright
Copyright © Marine Biological Association of the United Kingdom 1978

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