Consulta: creatorFacets:"Vincent, Dorothée"
Registros recuperados: 4
Data/hora: 02/06/2024 16:13:23

Feeding strategy of Downs herring larvae in the English Channel and North Sea
Provedor de dados: 5
Autores: Denis, Jeremy; Vallet, Carole; Vincent, Dorothée; Courcot, Lucie; Marchal, Paul; Loots, Christophe.
The aim of this study was to characterize the feeding strategy of Downs herring larvae at "critical period" during winter in the English Channel and North Sea was defined to assess whether nutrition is responsible for low recruitment in stocks over the past years. Data collected during the French part of the International Bottom Trawl Survey from 2008 to 2014 were used to analyse fish larvae diet by direct observation using Scanning Electron Microscope (SEM). Gut content methods generally used for copepods was adapted to fish larvae to assess phytoplankton ingestion. The relative importance of small preys (0,5-375µm) observed in gut contents proved the essential role of SEM to better acknowledge Downs herring diet. We demonstrated that Downs herring larvae...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00255/36608/35174.pdf

Copepod Grazing Influences Diatom Aggregation and Particle Dynamics
Provedor de dados: 5
Autores: Toullec, Jordan; Vincent, Dorothée; Frohn, Laura; Miner, Philippe; Le Goff, Manon; Devesa, Jérémy; Moriceau, Brivaela.
In marine ecosystems, carbon export is driven by particle flux which is modulated by aggregation, remineralization, and grazing processes. Zooplankton contribute to the sinking flux through the egestion of fast sinking fecal pellets but may also attenuate the flux by tearing apart phytoplankton aggregates into small pieces through swimming activity or direct ingestion. Freely suspended cells, artificial monospecific aggregates from two different diatom species (Chaetoceros neogracile and Skeletonema marinoi) and natural aggregates of Melosira sp. were independently incubated with five different copepod species (Acartia clausi, Temora longicornis, Calanus helgolandicus, Euterpina acutifrons, and Calanus hyperboreus). During the grazing experiments initiated...
Tipo: Text
Palavras-chave: Diatom aggregate; Grazing experiment; Copepod; Sinking velocity; Particle dynamics.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00594/70605/68799.pdf

Do transparent exopolymeric particles (TEP) affect the toxicity of nanoplastics on Chaetoceros neogracile?
Provedor de dados: 5
Autores: González-fernández, Carmen; Toullec, Jordan; Lambert, Christophe; Le Goïc, Nelly; Seoane, Marta; Moriceau, Brivaela; Huvet, Arnaud; Berchel, Mathieu; Vincent, Dorothée; Courcot, Lucie; Soudant, Philippe; Paul-pont, Ika.
The potential presence of nanoplastics (NP) in aquatic environments represents a growing concern regarding their possible effects on aquatic organisms. The objective of this study was to assess the impact of polystyrene (PS) amino-modified particles (50  nm PSNH2) on the cellular and metabolic responses of the diatom Chaetoceros neogracile cultures at two essential phases of the growth cycle, i.e. exponential (division) and stationary (storage) phases. Both cultures were exposed for 4 days to low (0.05 μg mL−1) and high (5 μg mL−1) concentrations of PS-NH2. Exposure to NP impaired more drastically the major cellular and physiological parameters during exponential phase than during the stationary phase. Only an increase in ROS production was observed at...
Tipo: Text
Palavras-chave: Nanoplastics; Diatoms; Physiology; Transparent exopolymer particles.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00491/60235/63627.pdf

Suivi du plancton gélatineux et des communautés zooplanctoniques associées dans le Port de Dunkerque. Année 2014
Provedor de dados: 5
Autores: Bastian, Thomas; Delegrange, Alice; Antajan, Elvire; Cornille, Vincent; Cordier, Remy; Mestre, Julie; Senaffe, Axel; Timmerman, Charles-andre; Vincent, Dorothée.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00410/52123/52834.pdf