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Evolution implications of sulphide-oxidizing symbioses in bivalves
Reid, R.G.B. (1990). Evolution implications of sulphide-oxidizing symbioses in bivalves, in: Morton, B. (Ed.) The Bivalvia: Proceedings of a Memorial Symposium in honour of Sir Charles Maurice Yonge (1899-1986) at the 9th International Malacological Congress, 1986, Edinburgh, Scotland, UK. pp. 127-140
In: Morton, B. (Ed.) (1990). The Bivalvia: Proceedings of a Memorial Symposium in honour of Sir Charles Maurice Yonge (1899-1986) at the 9th International Malacological Congress, 1986, Edinburgh, Scotland, UK. Hong Kong University Press: Hong Kong. ISBN 962-209-273-X. 355 pp., more

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    VLIZ: Proceedings [7751]

Keyword
    Marine

Author  Top 
  • Reid, R.G.B.

Abstract
    Sulphide-oxidizing symbioses between bivalves and intracellular ctenidial bacteria exist in Solemyoida, Lucinacea, Vesicomyidae and Mytilidae inhabiting sulphide-rich environments. In all of these groups except the Mytilidae the symbiosis has been the most radical evolutionary factor, affecting behaviour, ventilation and gill morphology. Labial palp reduction and gut simplification, reduction or loss and haemoglobin adaptation are other common effects. The functional significance of these changes is increased accommodation for the bacterial symbionts, and effective regulation and partitioning of oxygen and sulphide before they reach their targets. The symbiosis does not occur randomly but seems to require vertical transmission of the symbionts.

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