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Age, seasonal and diel variations of the uricolytic enzymatic system in the snailsXeropicta arenosa (Ziegler) andCernuella virgata (Da Costa)

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Summary

The nitrogen catabolism of two snail species,Xeropicta arenosa andCermuella virgata, living on coastal dunes, was studied at different seasons and times of the day and at different ages. All the nitrogenous metabolites of the uricolytic enzymatic system were found in body homogenates of the snails, although uric acid was most abundant. The highest levels of these catabolites were observed during the day when the snails were inactive, while the lowest levels occurred during the night when excretion probably took place. The levels of most of the nitrogenous catabolites and the activities of the enzymes were higher in juveniles than in adults.

All the enzymes of the uricolytic pathway were shown to be present in bothX. arenosa andC. virgata.

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Lazaridou-Dimitriadou, M., Kaloyianni, M. Age, seasonal and diel variations of the uricolytic enzymatic system in the snailsXeropicta arenosa (Ziegler) andCernuella virgata (Da Costa). J Comp Physiol B 159, 115–121 (1989). https://doi.org/10.1007/BF00692690

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Key words

  • Uricolysis
  • Snail
  • Xeropicta
  • Cernuella