Data/hora: 15/06/2024 13:49:27

Provedor de dados: | 5
País: | France
Título: | Yes, it turns: experimental evidence of pearl rotation during its formation
Autores: | Gueguen, Yannick; Czorlich, Yann; Mastail, Max; Le Tohic, Bruno; Defay, Didier; Lyonnard, Pierre; Marigliano, Damien; Gauthier, Jean-pierre; Bari, Hubert; Lo, Cedrik; Chabrier, Sebastien; Le Moullac, Gilles.
Data: | 2015-07
Ano: | 2015
Palavras-chave: | Pearl oyster; Pearl rotation; Biomineralization.
Resumo: | Cultured pearls are human creations formed by inserting a nucleus and a small piece of mantle tissue into a living shelled mollusc, usually a pearl oyster. Although many pearl observations intuitively suggest a possible rotation of the nucleated pearl inside the oyster, no experimental demonstration of such a movement has ever been done. This can be explained by the difficulty of observation of such a phenomenon in the tissues of a living animal. To investigate this question of pearl rotation, a magnetometer system was specifically engineered to register magnetic field variations with magnetic sensors from movements of a magnetic nucleus inserted in the pearl oyster. We demonstrated that a continuous movement of the nucleus inside the oyster starts after a minimum of 40 days post-grafting and continues until the pearl harvest. We measured a mean angular speed of 1.27° min−1 calculated for four different oysters. Rotation variability was observed among oysters and may be correlated to pearl shape and defects. Nature's ability to generate so amazingly complex structures like a pearl has delivered one of its secrets.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00275/38598/37127.pdf

DOI:10.1098/rsos.150144

http://archimer.ifremer.fr/doc/00275/38598/

Editor: | Royal Soc
Formato: | application/pdf
Fonte: | Royal Society Open Science (2054-5703) (Royal Soc), 2015-07 , Vol. 2 , N. 7 , P. 150144

Fonte:

2015 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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