On pearl formation in the venerid bivalve, Gafrarium tumidum Roding

Alagarswami, K (1965) On pearl formation in the venerid bivalve, Gafrarium tumidum Roding. Journal of the Marine Biological Association of India, 7 (2). pp. 345-347.

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Abstract

Bolman (1941) in his work ' The Mystery of the Pearl ' has elaborately dealt with all aspects of the pearl as the pearl producing molluscs, the structure of the pearl, its classification, chemical composition, culture, pearl fisheries of the world, the fossil pearls and the vegetable pearls. The marine lamellibranchs, gastropods, and freshwater bivalves of the superfamily Unionaceae are known to produce pearls in nature. Among these, the species under the genus Pinctada Roding are well known -as the gem pearl producing molluscs and welI-established and traditional fisheries exist for these species in some parts of the world. Other marine bivalve molluscs from which pearls have been obtained are Modiolus, Mytilus, Malleus, Pinna nigra, P. squamosa, P. nobilis, Placuna placenta, Tridacna gigas, Venus margarifia and Ostrea edulis (Bolman, 1941 ; Alexander, 1951 ; Cooke, 1959). Other genera which do not possess any mother-of-pearl layer, but in which sometimes po~(x1lanous pearls are found are Spondylus, Pecten, Anomia, Cytherea, Lutraria, Tellina, Mya, Hippopus, Solen, Arca and Glycymeris (Bolman, op.cit.). The present communication records a case of pearl formation in the bivalve species, Gafrarium tumidum Roding.

Item Type:	Article
Uncontrolled Keywords:	venerid bivalve, Gafrarium tumidum Roding; pearl formation
Subjects:	Molluscan Fisheries > Pearl oyster
Divisions:	CMFRI-Kochi > Marine Capture > Molluscan Fisheries Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Molluscan Fisheries Division CMFRI-Kochi > Marine Capture > Molluscan Fisheries Division Subject Area > CMFRI-Kochi > Marine Capture > Molluscan Fisheries Division
Depositing User:	Users 5 not found.
Date Deposited:	10 Aug 2010 08:41
Last Modified:	09 Sep 2015 15:14
URI:	http://eprints.cmfri.org.in/id/eprint/1853

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