Consulta: subjectFacets:"Oyster larvae"
Registros recuperados: 3
Data/hora: 08/06/2024 14:22:40

Analysis of larval oyster grazing by flow cytometry
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chretiennot-dinet, Marie-josèphe; Vaulot, Daniel; Galois, Robert; Spano, Anna-maria; Robert, Rene.
The ingestion of 8 algal species by oyster larvae (Crassostrea gigas Thunberg, 1793) was measured by flow cytometry (FCM). In a preliminary experiment, cell size (estimated by light scatter) and chlorophyll fluorescence of 30 algal species were evaluated to select those species which could be mixed together and still be easily discriminated by FCM. Grazing experiments were carried out over 48 h with 6 and 15-day old larvae fed on 3 algal mixtures, each containing 3 different algal species. The concentration of each species was estimated at 0, 6, 12, 24 and 48 h by FCM. Grazing pressure on a given algal species was dependent upon the age of the larvae, the time of the day and the composition of the mixture. Grazing rates of older larvae were about twice...
Tipo: Text
Palavras-chave: Oyster larvae; Crassostrea gigas; Grazing; Algae; Selective feeding; Flow cytometry.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00090/20164/17817.pdf

Interactions between Crassostrea virginica larvae and Deepwater Horizon oil: Toxic effects via dietary exposure
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vignier, J.; Rolton, A.; Soudant, Philippe; Chu, F. L. E.; Robert, Rene; Volety, A. K.
The Deepwater Horizon (DWH) disaster released crude oil in the Gulf of Mexico for 87 days, overlapping with the reproductive season and recruitment of the oyster Crassostrea virginica. The pelagic larval life stages of C. virginica are particularly vulnerable to contaminants such as polycyclic aromatic hydrocarbons (PAHs) and oil droplets. Based on their lipophilic properties, PAHs and oil droplets can adsorb onto phytoplankton and filter-feeding C. virginica larvae may be exposed to these contaminants bound to suspended sediment, adsorbed onto algal and other particles, or in solution. This study examined the effects of exposure of C. virginica larvae to algae mixed with DWH oil. In a 14-day laboratory exposure, 5 day-old C. virginica larvae were exposed...
Tipo: Text
Palavras-chave: Deepwater Horizon oil; Droplet; Oyster larvae; Dietary exposure; PAH.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00473/58423/61445.pdf

Rising water temperatures, reproduction and recruitment of an invasive oyster, Crassostrea gigas, on the French Atlantic coast
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Haure, Joel.
The recent appearance and invasion of feral oysters (Crassostrea gigas) along the northern European Atlantic coast, underscores the necessity to investigate the relationship between environmental variables, reproductive physiology, larval development and recruitment. We studied these relationships at both high (HT) and intermediate (IT) - turbidity sites, through historical data on water temperatures, multi-parameter environmental probes, histological analyses, and field collections of planktonic larvae and settled post-larvae in 2005 and 2006. A progressive warming trend was observed, especially since 1995, when oyster proliferation first became severe. Threshold temperatures for oocyte growth, larval development and settlement were achieved in both 2005...
Tipo: Text
Palavras-chave: Aquaculture; Climate warming; Coastal waters; Crassostrea gigas; Reproductive cycle; Oyster larvae; Settlement; Turbidity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11150/7938.pdf