Consulta: creatorFacets:"De Montaudouin, X"
Registros recuperados: 5
Data/hora: 11/06/2024 11:05:53

Infection characteristics of Himasthla elongata cercariae in cockles as a function of water current
Provedor de dados: 5
Autores: De Montaudouin, X; Wegeberg, Am; Jensen, Kt; Sauriau, Pg.
Digenean trematodes are widespread parasites of marine fauna. The first intermediate host of Himasthla elongata (Echinostomatidae) is the periwinkle Littorina littorea. The second host is less specific, as it includes Various bivalve species. The definitive host is a waterbird. The free-living cercaria acts to ensure transmission from the first and second intermediate hosts. We examined the impact of water flow (still and running water) and host size (6-8, 8-10, 10-12 mm shell length classes) on the settling success of H. elongata cercariae in the second intermediate host by utilizing the common cockle Cerastoderma edule. Under 2 scenarios (free-stream velocity of 0 and 6 cm s(-1)) more than 90% of the experimental population of cockles (90 individuals per...
Tipo: Text
Palavras-chave: Cerastoderma edule; Cercariae; Dispersion; Flume; Himasthla elongata; Metacercariae; Transmission efficiency; Trematode.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00446/55807/62267.pdf

Use of biotic indices in semi-enclosed coastal ecosystems and transitional waters habitats - Implications for the implementation of the European Water Framework Directive
Provedor de dados: 5
Autores: Blanchet, H; Lavesque, Nicolas; Ruellet, T; Dauvin, J; Sauriau, Pierre-guy; Desroy, Nicolas; Desclaux, C; Leconte, M; Bachelet, G; Janson, A; Bessineton, C; Duhamel, S; Jourde, J; Mayot, S; Simon, S; De Montaudouin, X.
This study deals with the application of macrozoobenthos-based biotic indices (BI) within the frame of the implementation of the European Water Framework Directive. More precisely, this study aimed at assessing the performance of five recently developed methodologies (BI) for the assessment of ecological quality status (EcoQ) in two semi-enclosed, sheltered coastal ecosystems and in one transitional water body situated along the Western French coast, namely Marennes-Oleron Bay, Arcachon Bay, and the Seine Estuary. This study showed that these five indices rarely agreed with each other, describing very different pictures of the overall EcoQ of the three study sites. This work also clearly underlined the limitations of these approaches, notably the...
Tipo: Text
Palavras-chave: Transitional waters; Semi enclosed coastal ecosystems; Benthic invertebrates; Directive; European Water Framework; Biotic index.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3987.pdf

Needle in a haystack: involvement of the copepod Paracartia grani, in the life-cycle of the oyster pathogen Marteilia refringens
Provedor de dados: 5
Autores: Audemard, Corinne; Le Roux, Frédérique; Barnaud, Antoine; Collins, Catherine; Sautour, B; Sauriau, Pierre-guy; De Montaudouin, X; Coustau, C; Combes, C; Berthe, Franck.
Marteilia refringens is a major pathogen of the European flat oyster, Ostrea edulis Linnaeus. Since its description, the lifecycle of this protozoan parasite has eluded discovery. Attempts to infect oysters experimentally have been unsuccessful and led to the hypothesis of a complex life-cycle involving several hosts. Knowledge of this life-cycle is of central importance in order to manage oyster disease. However, the exploration of M. refringens life-cycle has been previously limited by the detection tools available and the tremendous number of species to be screened in enzootic areas. In this study, these two restrictions were circumvented by the use of both molecular detection tools and a mesocosm with low biodiversity. Screening of the entire fauna of...
Tipo: Text
Palavras-chave: Experimental transmission; In situ hybridization; PCR; Paracartia grani; Ostrea edulis; Marteilia refringens.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-2778.pdf

Invasion of the eastern Bay of Biscay by the nassariid gastropod Cyclope neritea: origin and effects on resident fauna
Provedor de dados: 5
Autores: Bachelet, G; Simon-bouhet, B; Desclaux, C; Garcia-meunier, P; Mairesse, G; De Montaudouin, X; Raigne, H; Randriambao, K; Sauriau, Pierre-guy; Viard, F.
The distribution area of the nassariid gastropod Cyclope neritea (L.) includes the Mediterranean and the Black Sea, as well as the Atlantic coasts of the southern Iberian Peninsula. The species has spread north to the eastern Bay of Biscay (Arcachon Bay in 1976, Marennes-Oleron area and Morbihan Gulf in 1983-84). This spread might be explained either by (1) a natural spread favoured by environmental changes (e.g. an increase of temperature) or (2) a sudden range expansion due to the introduction of individuals from distant native populations. Molecular genetic analyses based on mitochondrial markers suggest that the present C. neritea population in Arcachon Bay has been introduced, probably unintentionally with oyster transfers, from several source...
Tipo: Text
Palavras-chave: Introduced species; Scavenging gastropods; Population genetics; Interspecific competition; Behaviour parasites.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10848/7582.pdf

Brown muscle disease (BMD), an emergent pathology affecting Manila clam Ruditapes philippinarum in Arcachon Bay (SW France)
Provedor de dados: 5
Autores: Dang, C; De Montaudouin, X; Gonzalez, P; Mesmer Duldons, N; Caill-milly, Nathalie.
We describe an emerging pathology, brown muscle disease (BMD), which specifically affects the Manila clam Ruditapes philippinarum in Arcachon Bay (France). BMD induces a transformation of the posterior adductor muscle, which becomes infused by conchiolin and calcified, reducing the ability of clams to bury. The disease affects both types of muscular tissue, with striated muscle becoming affected to a higher degree than smooth muscle. Two indices were created to quantify the symptoms: the Muscle Print Index, used for empty and live shells, and the Final Disease Index, utilized for live clams only. Histological sections were made and observed under light microscopy to examine the muscular damage and to investigate a causal agent. Sections revealed an...
Tipo: Text
Palavras-chave: Light microscopy; Pathology; Adductor muscle; Ruditapes philippinarum; Clam; Brown muscle disease.
Ano: 2008
URL: https://archimer.ifremer.fr/doc/2008/publication-4556.pdf