Elsevier

Comparative Biochemistry and Physiology

Volume 32, Issue 4, 15 February 1970, Pages 709-731, IN5-IN8
Comparative Biochemistry and Physiology

The effects of feeding and starvation on copper in the blood and hepatopancreas, and on blood proteins of crangon vulgaris (fabricius)

https://doi.org/10.1016/0010-406X(70)90823-6Get rights and content

Abstract

  • 1.

    1. The blood proteins of Crangon consist of haemocyanin (60–93 per cent of total protein) and minor proteins (characterized as apophaemocyamines, esterases and glycoproteins after starch gel or fluid agar electrophoresis).

  • 2.

    2. These proteins may vary tenfold in their concentration, but this variation is significantly correlated with the moulting cycle and, to a lesser extent, with season.

  • 3.

    3. During starvation, the blood proteins, particularly the glycoprotein fraction, fall in concentration. These changes are reversed by feeding. Concomitant changes in blood [Cy] are also seen.

  • 4.

    4. During starvation, the hepatopancreas accumulates Cu from the blood into copper vesicles. It is suggested that the hepatopancreas could accept all the copper circulating in the blood should haemocyanin be completely broken down.

  • 5.

    5. It is concluded that the observed copper and protein changes in brachyurans such as Maia during the moult cycle may be compared with natantians only when the effects of obligatory starvation in the former are taken into account.

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    Present address: Department of Zoology, University College of Cape Coast, Ghana, W. Africa.

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