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The chemical ecology of Biomphalaria glabrata: the effects of ammonia on the growth rate of juvenile snails
Thomas, J.D.; Powles, M.; Lodge, R. (1976). The chemical ecology of Biomphalaria glabrata: the effects of ammonia on the growth rate of juvenile snails. Biol. Bull. 151(2): 386-397
In: Biological Bulletin. Marine Biological Laboratory: Lancaster. ISSN 0006-3185, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Thomas, J.D., more
  • Powles, M.
  • Lodge, R.

Abstract
    When juvenile specimens of Biomphalaria glabrata were subjected to concentrations of ammonia ranging from 1-100 mug/ml in various media the following effects were observed: the addition of ammonia to borate buffered media caused mortality. Both borate and tris-buffered media caused a decrease in the growth rate of snails when compared with controls in SSW. The growth rates of the snails could be enhanced by increasing the concentration of ammonia to critical thresholds, but further increases beyond these thresholds resulted in growth inhibition. The toxicity of ammonia in ambient water was augmented by an an increase in pH. The possible causation and ecological significance of these effects are discussed. There are indications that the snails are physiologically well-adapted to utilize ammonia when required and also to control its excretion and uptake from the medium.

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