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Elevation in the levels of the blood inorganic ions and depl.etiott in tile levels of the blood organic reserves, except TNPS, noticed during' starvation regime • or tile slu& are discussed in view of their specific roles in energy metabolism.

Studies on the haemocyanin content in the blood of the freshwater field crab, Oziotelphusa senex senex (Fab) in relation to sex Abstract. The copper and protein contents have been determined in the blood and also in the purified haemocyanin of the freshwater field crab, Oziotelphusa senex senex (Fabricius) in relation to sex. The haemocyanin content was fairly higher in the blood of female crabs when compared to the males. However, the copper-protein ratio in the purified haemocyanin of both male and female crabs is 0·167%. Based on the copper content, the minimal molecular weight of the functional unit of the O. senex senex haemocyanin has been calculated as 76,120 daltons, The sex-based difference in the haemocyanin concentration has been discussed in the light of the existing literature.

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