Water Relations, Weight Loss and Nitrogenous Waste Products in the Giant African Land Snail Archachatina Marginata (Swainson) – Pulmonata: Achatinidae

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A. B. Onadeko
R. I. Egonmwan

Abstract

Variations in the water content, water loss and nitrogenous waste products of the edible giant land snail Archachatina marginata were investigated. The water content of the food component of the snails was also determined. The percentage water content of the active snails at 48.37%–51.74% was higher than that of the inactive snails at 30.31%–39.74%. The water loss in inactive snails was between 3.05%–15.35%, which was lower than that of the active snails between 6.32%–27.02%. There was no ammonia in the haemolymph of A. marginata, however, traces of urea and a large quantity of uric acid were observed. Analysis of the kidney contents revealed only the presence of urea. Qualitative analysis of the urine sample showed that only uric acid was present. It was observed that tomatoes had the highest water content while pawpaw leaves had the lowest. The highest organic matter was obtained from orange and the lowest was from the corn shaft. A positive correlation existed between the length and weight relationship of active (R2 ═ 0.708) and inactive (R2 ═ 0.698) snails. However a negative correlation existed between the weight and percentage water content of the snails; with similar results observed between the weight and percentage water loss. In relation to previous findings on the life-cycle strategies as well as nutritional and reproductive physiology of A. marginata, the results are discussed in the context of the physical adaptations of this species for survival in dry conditions.

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How to Cite
Onadeko, A., & Egonmwan, R. (2018). Water Relations, Weight Loss and Nitrogenous Waste Products in the Giant African Land Snail Archachatina Marginata (Swainson) – Pulmonata: Achatinidae. Journal of Scientific Research and Development, 17(1), 40-47. Retrieved from http://jsrd.unilag.edu.ng/article/view/37
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References

Bequaert, J. C. (1950). Studies in Achatinae, a group of African Land Snail. Bulletin of Museum of Comparative Zoology at Harvard College, 105: 1–216.
Brahmanandam, V., Krishnamoorthy, R. V. (1973). Hemochemistry and hematology of the aestivating pond snail Pila globosa (Gastropoda: Ampullaridae). The Veliger, 16: 176–180.
Cameron, R. A. D. (1970). The survival, weight loss and behaviour of three species of land snails in conditions of low humidity, Journal of Zoology, 160: 143–147.
Dainton, B. H. (1954). The acidity and induction of activity by changing temperatures in slugs, Journal of Experimental: Biology, 31: 165–197.
Ebenso, I. E. (2002). Consumption and sale of domesticated snails Archachatina marginata in rural southern Nigeria, Tropical Science (England), 42: 185–187.
Ebenso, I. E. (2004). Molluscicidal effect of neem Azadirachta indica extracts on edible tropical land snails, Pest Management Science (England), 60: 178–182.
Egonmwan, R. I. (1988). Reproductive biology and growth of the land snails: Archachatina marginata ovum and Limicolaria flammea, Ph.D. Thesis, University of Oxford, London, 186pp.
Etchu, K. A., Mafeni, J. M., Ngenwi, A. A. (2008). Comparative performance of three edible snail species using intensive cage housing system in Cameroon, Bull. Anim. Health Prod. Afr. 56: 345–352.
Ghose, K. C. (1960). Observation on the mating and oviposition of two land pulmonates Achaatinafalica Bowdich and Macrochiamys indica Godwin Austen, Journal of the Bombay Natural History Society, 56: 63–127.
Giokas, S., Pafilis, P., Valakos, E. (2005). Ecological and physiological adaptations of the land snail Albinaria caerulea (Pulmonata: Clausiliidae). Journal of Molluscan Studies, 71: 15–23.
Hoar, W. S. (1975). General and Comparative Physiology, New York Academic Press, 1039pp.
Hodasi, J. K. (1979). Preliminary studies on the feeding and burrowing habits of Achatina achatina, Ghana Journal of Science 15: 193–199
Luchtel, D. L., Deyrup-Olsen, I. (2001). Body Wall: Forms and Function. In: The Biology of Terrestrial Molluscs, G. M. Barker, ed., CAB International, Oxford, p. 147–178.
Lyth, M. (1983). Water content of slugs (Gastropoda: Pulmonata) in natural habitats, and the influence of culture conditions on water content stability in Anon ater (Linné), Journal of Molluscan Studies, 49: 179–184.
Machin, J. (1967). Structural adaptation for reducing water-loss in three species of terrestrial snails, Journal of Zoology, 151: 55–65.
Machin, J. (1972). Water exchange in the mantle of a terrestrial snail during periods of reduced evaporative loss, Journal of Experimental Biology, 57: 103–111.
Machin, J. (1975). Water relationships. In: Pulmonates, Vol. 1., Fretter, V., Peake, J., eds., Academic Press, London, p. 105–163.
Mead, A. R. (1952). The Giant West African Snails: A Problem in Economic Malacology, Chicago, IIIinois University of Chicago press, l28pp.
Ngenwi, A. A., Mafeni, J. M., Etchu, K. A., Oben, F. T. (2010). Characteristics of snail farmers and constraints to increased production in West and Central Africa. Afr. J. Environ. Sci. Tech., 4(5): 274–278.
Newmann, K. C., Thomas, R. E. (1975). Ammonia, urea and uric acid levels in active and aestivating snails Bakerilymnaea cockerelli, Comparative Biochemistry and Physiology 50(1): 109–112
Odiete, W. O. (1999). Environmental Physiology of Animals and Pollution. Diversified Resources Ltd., Lagos, 261pp.
Okon, B., Ibom, L. A. (2011). Phenotypic correlations and body weights prediction using morphometric traits of snails in Calabar, Nigeria, Ethiopian Journal of Environmental Studies and Management, 4(3): 7–11.
Oyenusi, O. (1992). Effect of Environmental Factors on Snails, Graduate Work Project, 4lpp.
Pilsbry, H. A. (1904) Family Aschatinidae. Manual of Conchology, Edinburgh, 1986, 488pp.
Plummer, J. M. (1975). Observation on the reproduction, growth and longevity of a laboratory colony of Archachatina (Calachatina) marginata ovum (Swainson). Proc. Mal. Soc. London 41: 395–413
Prior, D. J. (1985). Water regulatory behaviour in terrestrial gastropods, Biological Reviews, 60: 403–424.
Rees, W. J. (1975). The Giant African Snails. Proceeding of the Zoological Society of London, 120: 577–598.
Segun, A. O. (1975). The Giant Land Snails 2 Archachatina (Calachatina) marginata (Swainson), Ethiope Publishing House, Benin City, Nigeria. 25pp.
Solem, A. (1985). Origin and diversification of pulmonate land snails. In: The Mollusca, Vol. 10, Evolution., Trueman, E. R., Clarke, M. R., eds., Academic Press, New York, p. 269–293.
South, A. (1992). Terrestrial Slugs. Chapman and Hall, London, 428pp.
Yom-Tov, Y. (1971). Annual fluctuation in the water content of desert snails, Malacological Review, 4: 121–126.