FN Archimer Export Format PT J TI Abnormal periostracum secretion during the mineralization process of the pearl in the blacklip pearl oyster Pinctada margaritifera BT AF COMPS, Michel HERBAUT, Christian FOUGEROUSE, Angélique AS 1:;2:;3:; FF 1:;2:;3:; C1 IFREMER, Chemin Maguelonne, F-34250 Palavas Les Flots, France. C2 IFREMER, FRANCE IN WOS Ifremer jusqu'en 2018 IF 0.942 TC 7 UR https://archimer.ifremer.fr/doc/2000/publication-545.pdf LA English DT Article DE ;Periostracum;Pearl bag;Pinctada margaritifera AB Whitish parasite-like bodies (PLBs), 0.5-2 mu m in size, were detected within the pearl bag of some grafted pearl oysters, Pinctada margaritifera, from Takapoto island (French Polynesia). Histological and ultrastructural investigations have revealed that these bodies consisted of lamellar organic material locally secreted by some epithelial cells of the pearl bag. The fine structure and the formation of these bodies are described. The causes of this abnormal secretion of organic mater, which actually corresponds to periostracum, are not presently known. No parasite nor infectious micro-organism was found associated with the PLBs. PY 2000 SO Aquatic Living Resources SN 0990-7440 PU Elsevier VL 13 IS 1 UT 000086620900006 BP 49 EP 55 DI 10.1016/S0990-7440(00)00134-0 ID 545 ER EF