Consulta: creatorFacets:"Lignot, Jehan-hervé"
Registros recuperados: 3
Data/hora: 02/06/2024 08:51:42

Change of osmoregulatory and hematological parameters in tilapia (Oreochromis niloticus) after exposure to sublethal mercury concentrations
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Handayani, Kiki Syaputri; Soegianto, Agoes; Lignot, Jehan-hervé.
The effects of Hg exposure on blood parameters and gill physiology of tilapia (Oreochromis niloticus) were analyzed. Fish maintained in freshwater were exposed for 7 days (d) to sublethal mercury concentrations (0.1 and 1 mg/L). Blood serum osmolality (SO), sodium (Na+), potassium (K+) and chloride (Cl−) ionic concentrations, and hematological parameters were assessed after 1 up to 7 d of exposure. Serum osmolality and ionic concentrations of exposed fish appeared differently affected throughout the experimental period compared to the controls. Osmolality was reduced at the 2 tested concentrations but Na+ and Cl− contents were only altered at 1 mg/L of Hg after 1 d of exposure and values rapidly returned to the control values thereafter. K+ content was...
Tipo: Text
Palavras-chave: Mercury; Tilapia; Osmoregulation; Serum ions; Blood; Aquatic toxicology.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00648/76033/76943.pdf

Description of the unusual digestive tract of   Platax orbicularis   and the potential impact of   Tenacibaculum maritimum   infection
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Alix, Maud; Gasset, Eric; Bardon-albaret, Agnes; Noel, Jean; Pirot, Nelly; Perez, Valérie; Coves, Denis; Saulnier, Denis; Lignot, Jehan-hervé; Cucchi, Patricia N.
Background Ephippidae fish are characterized by a discoid shape with a very small visceral cavity. Among them Platax orbicularis has a high economic potential due to its flesh quality and flesh to carcass ratio. Nonetheless, the development of its aquaculture is limited by high mortality rates, especially due to Tenacibaculum maritimum infection, occurring one to three weeks after the transfer of fishes from bio-secure land-based aquaculture system to the lagoon cages for growth. Among the lines of defense against this microbial infection, the gastrointestinal tract (GIT) is less studied. The knowledge about the morphofunctional anatomy of this organ in P. orbicularis is still scarce. Therefore, the aims of this study are to characterize the GIT in...
Tipo: Text
Palavras-chave: Digestive system; Tenacibaculosis; Mucous; Osmoregulation; Absorption; Batfish; Teleost.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00652/76421/77485.pdf

Wastewater bioremediation by mangrove ecosystems impacts crab ecophysiology: in-situ caging experiment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Theuerkauff, Dimitri; Rivera-ingraham, Georgina A.; Lambert, Sophia; Mercky, Yann; Lejeune, Mathilde; Lignot, Jehan-hervé; Sucré, Elliott.
Mangroves are tidal wetlands that are often under strong anthropogenic pressures, despite the numerous ecosystem services they provide. Pollution from urban runoffs is one such threats, yet some mangroves are used as a bioremediation tool for wastewater (WW) treatment. This practice can impact mangrove crabs, which are key engineer species of the ecosystem. Using an experimental area with controlled WW releases, this study aimed to determine from an ecological and ecotoxicological perspective, the effects of WW on the red mangrove crab Neosarmatium africanum. Burrow density and salinity levels (used as a proxy of WW dispersion) were recorded, and a 3-week caging experiment was performed. Hemolymph osmolality, gill Na+/K+-ATPase (NKA) activity and gill...
Tipo: Text
Palavras-chave: Mangrove; Bioturbation; Wastewater; Ecophysiology; Oxidative stress; Osmoregulation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00592/70449/68559.pdf