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Titre du document / Document title

Modification of shell formation in the giant clam Tridacna gigas at elevated nutrient levels in sea water

Auteur(s) / Author(s)

BELDA C. A. ; CUFF C. ; YELLOWLEES D. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

James Cook univ. North Queensland, fac. sci., Townsville Queensl. 4811, AUSTRALIE

Résumé / Abstract

The effect on shell formation of Tridacna gigas by sea water supplemented for 3 mo with ammonium (5, 10 μM, N) and phosphate (2, 5, 10 μM, P), separately or in combination, was examined. Exposure to N and N+P significantly enhanced shell-extension rates, but significantly reduced shell weights at equivalent size. Scanning-electron microscopy further revealed structural alterations in the outer shell layer, such as misshapen aragonite crystals, irregular crossed-lamellar orientation, and relatively porous shell microstructure. These observations are consistent with results of X-ray diffractometry on the shells which show distinct shifts in the positions of reflections from the (012) and (200) crystal planes relative to the control, indicating changes in crystal lattice parameters following addition of nutrients

Revue / Journal Title

Marine biology    ISSN  0025-3162   CODEN MBIOAJ 

Source / Source

1993, vol. 117, no2, pp. 251-257 (29 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1967) (Revue)

Mots-clés anglais / English Keywords

Calcification

;

Shell(anatomy)

;

Nutrient

;

Phosphates

;

Nitrogen

;

Concentration

;

Environmental factor

;

Marine environment

;

Bivalvia

;

Mollusca

;

Invertebrata

;

Mots-clés français / French Keywords

Calcification

;

Coquille

;

Nutriment

;

Phosphate

;

Azote

;

Concentration

;

Facteur milieu

;

Milieu marin

;

Tridacna gigas

;

Bivalvia

;

Mollusca

;

Invertebrata

;

Mots-clés espagnols / Spanish Keywords

Calcificación

;

Concha

;

Nutriente

;

Fosfato

;

Nitrógeno

;

Concentración

;

Factor medio

;

Medio marino

;

Bivalvia

;

Mollusca

;

Invertebrata

;

Localisation / Location

INIST-CNRS, Cote INIST : 8506, 35400004832557.0090

Nº notice refdoc (ud4) : 3847753



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