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The effect of starvation in vitro, on the free amino acids and sugars in the daughter sporocysts of Microphallus pygmaeus (levinsen, 1881) (trematoda: Microphallidae)

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Summary

Variations in the quantities of free amino acids and sugars within, and in the nitrogen compounds leaked by, daughter sporocysts Microphallus pygmaeus during starvation in vitro, confirm earlier work on the changes in metabolic rate and respiratory quotient, which suggests that mainly stored carbohydrate is used as a source of energy during the first period of starvation. Mainly lipids, but possibly some tissue proteins are utilised in the second period of starvation and mainly tissue proteins during the final period.

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References

  • Cheng, T. C.: Biochemical requirements of larval trematodes. Ann. N. Y. Acad. Sci. 113, 289–320 (1963).

    Google Scholar 

  • Hamajima, F.: Studies on the metabolism of lung flukes, genus Paragonimus. II. Paper chromatography of sugars and hexose phosphates in uterine eggs, larvae and adults. Jap. J. Parasit. 15, 239–245 (1966a).

    Google Scholar 

  • — Studies on the metabolism of lung flukes, genus Paragonimus. I. Paper chromatographic analyses of free amino acids and amino sugar in uterine eggs, larvae and adults. Jap. J. Parasit. 15, 124–127 (1966b).

    Google Scholar 

  • Imohiosen, E.: The biology of larval Digenea from littoral molluscs: The ultrastructure and enzyme histochemistry of germinal sacs. Ph. D. Thesis. University College, Swansea (1969).

    Google Scholar 

  • James, B. L.: The effects of parasitism by larval Digenea on the digestive gland of the intertidal prosobranch, Littorina saxatilis (Olivi) subsp. tenebrosa (Montagu). Parasitology 55, 93–115 (1965).

    Google Scholar 

  • Negus, M. R. S.: The nutrition of sporocysts of the trematode, Cercaria doricha Rothschild, 1935 in the molluscan host Turritella communis Risso. Parasitology 58, 355–366 (1968).

    Google Scholar 

  • Pascoe, D., Richards, R. J.: Variations in the respiratory quotient of the daughter sporocysts of Cercaria dichotoma Lebour, 1911 during starvation. Acta parasit. pol. (In press) (1969).

  • — James, B. L.: Oxygen uptake, metabolic rate, reduced weight, length, and number of cercariae in starving sporocysts of Cercaria dichotoma. Exp. Parasit. 23, 171–182 (1968).

    Google Scholar 

  • Purdy, S. J., Truter, E. V.: Quantitative analysis by thin film chromatography. The Analyst 87, 802–809 (1962).

    Google Scholar 

  • Richards, R. J.: Qualitative and quantitative estimations of the free sugars in the digestive gland and gonad of Littorina saxatilis tenebrosa (Mont.) and in the daughter sporocysts of Microphallus pygmaeus (Levinsen, 1881) and Microphallus similis (Jagerskiold, 1900) (Trematoda: Microphallidae). Ph. D. Thesis, Chapter 8, University College, Swansea (1969a).

    Google Scholar 

  • — Qualitative and quantitative estimations of the free amino acids in the parasitised and healthy digestive gland and gonad of Littorina saxatilis tenebrosa (Mont.) and in the daughter sporocysts of Microphallus pygmaeus (Levinsen, 1881) and Microphallus similis (Jagerskiöld, 1900) (Trematoda: Microphallidae). Comp. Biochem. Physiol. 31, 655–665 (1969b).

    Google Scholar 

  • — Variations in the oxygen uptake, reduced weight and metabolic rate of starving sporocysts of Microphallus pygmaeus (Levinsen, 1881) (Trematoda: Microphallidae). J. Helminth 44, 75–88 (1970a).

    Google Scholar 

  • -- The leakage and transamination of amino acids in vitro, by the germinal sacs of Digenea from marine molluscs. J. Helminth (in press) (1970b).

  • Senft, A. W.: Observations on amino acid metabolism of Schistosoma mansoni in a chemically defined medium. Ann. N. Y. Acad. Sci. 113, 272–288 (1963).

    Google Scholar 

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Richards, R.J. The effect of starvation in vitro, on the free amino acids and sugars in the daughter sporocysts of Microphallus pygmaeus (levinsen, 1881) (trematoda: Microphallidae). Z. F. Parasitenkunde 35, 31–39 (1970). https://doi.org/10.1007/BF00259528

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