Results 51 to 60 of about 5,074 (174)

Insights from tyrosinase into the impacts of modified morphology of calcium carbonate on the nacre formation of pearl oysters

Frontiers in Marine Science, 2022
Tyrosinase is a type-3 copper protein with six conserved histidine residues within the copper-binding sites. It participates in mollusk nacre formation.
Xinwei Xiong, Yanfei Cao, Zhixin Li, Ronglian Huang, Ronglian Huang, Ronglian Huang, Yu Jiao, Yu Jiao, Yu Jiao, Liqiang Zhao, Xiaodong Du, Xiaodong Du, Xiaodong Du, Xiaodong Du, Xiaodong Du, Zhe Zheng, Zhe Zheng, Zhe Zheng   +17 more
doaj   +1 more source

Influence of temperature and pearl rotation on biomineralization in the pearl oyster Pinctada margaritifera [PDF]

Journal of Experimental Biology, 2018
The objective of this study was to observe the impact of temperature on pearl formation using an integrative approach describing the rotation of the pearls, the rate of nacre deposition, the thickness of the aragonite tablets and the biomineralizing potential of the pearl sac tissue though the expression level of some key genes.
Le Moullac, Gilles, Schuck, Lucie, Chabrier, Sébastien, Belliard, Corinne, Lyonnard, Pierre, Broustal, Floriane, Soyez, Claude, Saulnier, Denis, Brahmi, Chloé, Ky, Chin-Long, Beliaeff, Benoit   +10 more
openaire   +3 more sources

Larval dispersal of pearl oysters Pinctada margaritifera in the Gambier Islands (French Polynesia) and exploring options for adult restocking using in situ data and numerical modelling.

Marine Pollution Bulletin, 2023
Black pearl farming is the second source of French Polynesia income after tourism, and Gambier Islands are the main farming sites. Gambier main lagoon contains several sub-lagoons critical for pearl oyster rearing and spat collecting (SC).
Oriane Bruyère, Mathilde Chauveau, R. Le Gendre, V. Liao, S. Andréfouët   +4 more
semanticscholar   +1 more source

Toxic effects of leachates from plastic pearl-farming gear on embryo-larval development in the pearl oyster Pinctada margaritifera.

Water Research, 2020
Pearl-farming leads to significant plastic pollution in French Polynesia (FP) as the end of life of most farming gear is currently poorly managed. Plastic debris released into the aquatic environment accumulates, with potentially detrimental effects on ...
T. Gardon, A. Huvet, I. Paul-Pont, A. Cassone, Manaarii Sham Koua, C. Soyez, R. Jézéquel, J. Receveur, G. Le Moullac   +8 more
semanticscholar   +1 more source

Insights into the genetic makeup of French Polynesian peripheral populations of the small giant clam Tridacna maxima

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 33, Issue 12, Page 1514-1534, December 2023., 2023
Abstract The small giant clam, Tridacna maxima, is distributed from the Red Sea and East African coast to French Polynesia. Across this widespread Indo‐Pacific range, T. maxima shows strong population structure, in agreement with its limited dispersal abilities.
Florentine Riquet, Mathilde Horaud, Vaimiti Dubousquet, Josina Tiavouane, Carmela Lopes, Phila Raharivelomanana, Véronique Berteaux‐Lecellier, Serge Planes, Daphné Grulois, Serge Andréfouët, Simon Van Wynsberge, Philippe Borsa, Gaël Lecellier, Cécile Fauvelot   +13 more
wiley   +1 more source

Feeding the pearl oysterPinctada margaritiferaduring reproductive conditioning [PDF]

Aquaculture Research, 2011
This study aimed to model the food intake of P. margaritifera in order to examine the relationship between food level and reproductive activity. The effect of microalgae concentration on ingestion rate and assimilation efficiency was studied over a broad concentration range, using a mixture of Isochrysis galbana and Chaetoceros gracilis.
Le Moullac, Gilles, Soyez, Claude, Sham-Koua, Manaarii, Levy, Peva, Moriceau, Jacques, Vonau, Vincent, Maihota, Mayalen, Cochard, Jean-Claude   +7 more
openaire   +3 more sources

Calcitic Prisms of The Giant Seashell Pinna Nobilis Form Light Guide Arrays

Advanced Materials, Volume 35, Issue 39, September 27, 2023., 2023
The calcitic prisms in Pinna nobilis shells act as optical fiber arrays guiding ambient light with high resolution into the inner shell cavity by total internal reflection. This is attributed to the high refractive index of calcite along the optical axis of the prisms and the coverage of their interfaces by low refractive index organic sheaths ...
Shahrouz Amini, Tingting Zhu, Abin Biswas, Mohammad Avalin Charsooghi, Kyoohyun Kim, Simone Reber, Yannicke Dauphin, Peter Fratzl   +7 more
wiley   +1 more source

Symbiotic relationship between the carapid fish Onuxodon fowleri (Ophidiiformes: Carapidae) and the pearl oyster Pinctada margaritifera (Mollusca: Bivalvia: Pteriidae)

Scientia Marina, 2018
At Makemo Atoll (French Polynesia), the carapid fish Onuxodon fowleri lives in symbiosis with the black-lip pearl oyster Pinctada margaritifera. Although the symbiont seems to live inside its host bivalve by using it as a shelter, additional data are ...
Orphal Colleye, Loïc Kéver, Gilles Lepoint, David Lecchini, Eric Parmentier   +4 more
doaj   +1 more source

Microplastics induce dose-specific transcriptomic disruptions in energy metabolism and immunity of the pearl oyster Pinctada margaritifera.

Environmental Pollution, 2020
A combined approach integrating bioenergetics and major biological activities is essential to properly understand the impact of microplastics (MP) on marine organisms. Following experimental exposure of polystyrene microbeads (micro-PS of 6 and 10 μm) at
T. Gardon, Lucie Morvan, A. Huvet, V. Quillien, C. Soyez, G. Le Moullac, J. Le Luyer   +6 more
semanticscholar   +1 more source

Iridescent Color of a Shell of the Mollusk Pinctada Margaritifera Caused by Diffraction

Optics Express, 1999
Shells and pearls often show iridescent color. The cause of this phenomenon has been attributed to diffraction, both diffraction and interference, or interference alone. We used a shell of the mollusk Pinctada margaritifera, which shows very strong iridescent colors, to study how this color is produced in the layers of nacre in shells.
Y, Liu, J, Shigley, K, Hurwit
openaire   +2 more sources