Consulta: creatorFacets:"Gardon, Tony"
Registros recuperados: 3
Data/hora: 10/06/2024 18:06:18

Toxic effects of leachates from plastic pearl-farming gear on embryo-larval development in the pearl oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Gardon, Tony; Huvet, Arnaud; Paul-pont, Ika; Cassone, Anne-laure; Koua, Manaarii Sham; Soyez, Claude; Jezequel, Ronan; Receveur, Justine; Le Moullac, Gilles.
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 the lagoon ecosystem and pearl oyster Pinctada margaritifera, a species of ecological, commercial and social value. Here, we tested the effects of leachates from new (N) and aged (A) plastic pearl-farming gear (spat collector and synthetic rope) obtained after 24 h and 120 h incubation, on the embryo-larval development of the pearl oyster using an in-vitro assay. Embryos were exposed for 24 h and 48 h to a negative control (0) and the leachate from 0.1, 1, 10 and 100 g of plastic. L−1. After 24 h exposure to...
Tipo: Text
Palavras-chave: Aquaculture; Synthetic materials; Hazardous chemicals; Toxicity; Marine bivalve; Early development.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73917/73257.pdf

Microplastics Affect Energy Balance and Gametogenesis in the Pearl Oyster     Pinctada margaritifera
Provedor de dados: 5
Autores: Gardon, Tony; Reisser, Celine; Soyez, Claude; Quillien, Virgile; Le Moullac, Gilles.
Plastic pollution in the environment is increasing at global scale. Microplastics (MP) are derived from degradation of larger plastic items or directly produced in microparticles form (&lt;5 mm). Plastics, widely used in structures and equipments of pearl farming, are a source of pollution to the detriment of the lagoon ecosystem. In order to evaluate the impact of MP on the physiology of Pinctada margaritifera, a species of ecological and commercial interests, adult oysters were exposed to polystyrene microbeads (micro-PS of 6 and 10 μm) for 2 months. Three concentrations were tested: 0.25, 2.5, 25 μg L-1 and a control. Ingestion and respiration rate and assimilation efficiency were monitored on a metabolic measurement system to determine the individual...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00435/54684/56104.pdf

Microplastics induce dose-specific transcriptomic disruptions in energy metabolism and immunity of the pearl oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Gardon, Tony; Morvan, Lucie; Huvet, Arnaud; Quillien, Virgile; Soyez, Claude; Le Moullac, Gilles; Le Luyer, Jeremy.
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 0.25, 2.5, and 25 μg L−1, which demonstrated a dose-dependent decrease of energy balance in the pearl oyster Pinctada margaritifera, a transcriptomic study was conducted on mantle tissue. Transcriptomic data helped us to decipher the molecular mechanisms involved in P. margaritifera responses to micro-PS and search more broadly for effects on energetically expensive maintenance functions. Genes related to the detoxification process were impacted by long-term micro-PS exposure through a decrease in...
Tipo: Text
Palavras-chave: Microbeads; Marine bivalve; Differentially expressed genes; Stress response; Energy-limited tolerance.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75213/75351.pdf