Consulta: subjectFacets:"Giant clams"
Registros recuperados: 4
Data/hora: 01/06/2024 14:33:10

Tissue Distribution and Elimination of Ciguatoxins in Tridacna maxima (Tridacnidae, Bivalvia) Fed Gambierdiscus polynesiensis
Provedor de dados: 5
Autores: Roue, Melanie; Darius, Helene Taiana; Ung, Andre; Viallon, Jerome; Sibat, Manoella; Hess, Philipp; Amzil, Zouher; Chinain, Mireille.
Ciguatera is a foodborne disease caused by the consumption of seafood contaminated with ciguatoxins (CTXs). Ciguatera-like poisoning events involving giant clams (Tridacna maxima) are reported occasionally from Pacific islands communities. The present study aimed at providing insights into CTXs tissue distribution and detoxification rate in giant clams exposed to toxic cells of Gambierdiscus polynesiensis, in the framework of seafood safety assessment. In a first experiment, three groups of tissue (viscera, flesh and mantle) were dissected from exposed individuals, and analyzed for their toxicity using the neuroblastoma cell-based assay (CBA-N2a) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analyses. The viscera, flesh, and mantle were...
Tipo: Text
Palavras-chave: Giant clams; Ex situ exposure to toxic algae; Ciguatoxins; Gambierdiscus polynesiensis; Anatomical distribution; Toxin elimination; CBA-N2a; LC-MS/MS.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55123/56579.pdf

Molecular mechanisms of acclimation to long‐term elevated temperature exposure in marine symbioses
Provedor de dados: 5
Autores: Alves Monteiro, H.j.; Brahmi, C.; Mayfield, A.b.; Vidal‐dupiol, J.; Lapeyre, B.; Le Luyer, Jeremy.
Seawater temperature rise in French Polynesia has repeatedly resulted in the bleaching of corals and giant clams. Because giant clams possess distinctive ectosymbiotic features, they represent a unique and powerful model for comparing molecular pathways involved in 1) maintenance of symbiosis and 2) acquisition of thermo‐tolerance among coral reef organisms. Herein, we explored the physiological and transcriptomic responses of the clam hosts and their photosynthetically active symbionts over a 65‐day experiment in which clams were exposed to either normal or environmentally relevant elevated seawater temperatures. Additionally, we used metabarcoding data coupled with in situ sampling/survey data to explore the relative importance of holobiont adaptation...
Tipo: Text
Palavras-chave: Co-expression network analysis; Giant clams; Metabarcoding; RNA-Seq; Symbiodiniaceae; Thermo-acclimation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00591/70271/68331.pdf

Evidence of the bioaccumulation of ciguatoxins in giant clams (Tridacna maxima) exposed to Gambierdiscus spp. cells
Provedor de dados: 5
Autores: Roue, Melanie; Darius, Helene Taiana; Picot, Sandy; Ung, Andre; Viallon, Jerome; Gaertner-mazouni, Nabila; Sibat, Manoella; Amzil, Zouher; Chinain, Mireille.
Ciguatera Fish Poisoning (CFP) is a foodborne disease classically related to the consumption of tropical coral reef fishes contaminated with ciguatoxins (CTXs), neurotoxins produced by dinoflagellates of the Gambierdiscus genus. Severe atypical ciguatera-like incidents involving giant clams, a marine resource highly consumed in the South Pacific, are also frequently reported in many Pacific Islands Countries and Territories. The present study was designed to assess the ability of giant clams to accumulate CTXs in their tissues and highlight the potential health risks associated with their consumption. Since giant clams are likely to be exposed to both free-swimming Gambierdiscus cells and dissolved CTXs in natural environment, ex situ contamination...
Tipo: Text
Palavras-chave: Giant clams; Ex situ contamination; Ciguatoxins; Gambierdiscus polynesiensis; LC-MS/MS; Neuroblastoma cell-based assay.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00343/45415/45123.pdf

OPTIMAL MANAGEMENT OF GIANT-CLAM FARMING IN SOLOMON ISLANDS
Provedor de dados: 31
Autores: Hean,   Robyn L.; Cacho,   Oscar J.
Giant-clam farming is undertaken by coastal villagers in Solomon Islands as part of a research and development project of the International Center for Living Aquatic Resources Management (ICLARM).  The production technology is simple and does not require a large capital investment.  The main inputs are clam seed, labour and time.  Labour is used for activities such as seeding, cleaning, thinning and harvesting.  In this paper, a bioeconomic model is used to explore optimal farm management.  The theoretical basis for this analysis is found in the economic theory of optimal forestry exploitation.  The management variables considered are husbandry applied to cleaning and the frequency with which thinning is undertaken.  The optimal cycle-length is determined...
Tipo: Working or Discussion Paper
Palavras-chave: Bioeconomics; Giant clams; Subsistence mariculture; Farm Management.
Ano: 1999
URL: http://purl.umn.edu/12935