Consulta: creatorFacets:"Mugnier, Chantal"
Registros recuperados: 13
Data/hora: 05/06/2024 18:23:28

Evolution of shrimp production and pond bottom in a semi-intensive system
Provedor de dados: 5
Autores: Lemonnier, Hugues; Brizard, Raphael; Mugnier, Chantal; Herlin, Jose.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00354/46558/46369.pdf

Combined effect of exposure to ammonia and hypoxia on the blue shrimp Litopenaeus stylirostris survival and physiological response in relation to molt stage
Provedor de dados: 5
Autores: Mugnier, Chantal; Zipper, Etienne; Goarant, Cyrille; Lemonnier, Hugues.
The effect of ambient ammonia, hypoxia and combination of both on survival and the physiological and immunological response of the blue shrimp Litopenaeus stylirostris in relation to molt stage was studied. Shrimp were submitted to 44.0-71.5 mg 1(-1) total ammonia-N corresponding to 2.0 mg 1(-1) unionized ammonia NH3-N and/or to 1.5 mg O-2 1(-1) (4.3 kPa) for 24 hours. Survival was recorded and the molt stages of both dead and surviving shrimp determined. Only shrimp in intermolt and premolt stages were sampled for analysis of haemolymph. Haemolymph was assayed for osmoregulatory capacity (OC), magnesium ion (Mg2+), calcium ion (Ca2+), total proteins, oxyhaemocyanin, lactate, glucose and total haemocyte count (THC).   Low mortalities were recorded for...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4092.pdf

Nutrient and microbial dynamics in eutrophying shrimp ponds affected or unaffected by vibriosis
Provedor de dados: 5
Autores: Lemonnier, Hugues; Courties, Claude; Mugnier, Chantal; Torreton, Jean-pascal; Herbland, Alain.
A field survey was conducted on two intensive shrimp farms using similar technical practices: one (DF) historically affected by a vibriosis, the other (HC) in which the pathogen has been observed although no mortality event has occurred. Because historical data suggest that eutrophication process may directly or indirectly play a role in the disease outbreak, we focussed our research on its dynamics. A higher variability of the phytoplanktonic compartment linked to an imbalance in the molar N:P ratio was observed in farm DF compared to farm HC, implying a modification on the linkage between the bacteria and phytoplankton compartments at DF. The beginning of the mortality outbreak at DF followed a shift from picoto nanophytoplankton. The organic matter...
Tipo: Text
Palavras-chave: Aquaculture; Shrimp; Eutrophication; Ecosystem shift; Phytoplankton; Vibriosis.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11368/8119.pdf

Sperm features in turbot (Scophthalmus maximus): a comparison with other freshwater and marine fish species
Provedor de dados: 5
Autores: Suquet, Marc; Billard, Roland; Cosson, Jacky; Dorange, Germaine; Chauvaud, Laurent; Mugnier, Chantal; Fauvel, Christian.
This paper presents some features of turbot sperm and compares them with data reported in the literature on other freshwater and marine fish. In captivity, turbot spermiation period lasts 6 months. When compared to other fish species, turbot males are characterized by low values of maximum gonadosomatic index (0.6-0.8%) and are poor sperm producers in terms of volume (0.2-2.2 ml), concentration (0.7-11.0 x 10(9) spermatozoa/ml) and total sperm number released per stripping (0.2-12.0 x 10(9) spermatozoa). Compared to most freshwater species, the duration of cell movement is long (1-17 min). The spermatozoon of turbot can be considered to be of a primitive type. A very high protein content (8.8 mg/ml) is found in the seminal fluid of turbot. Increasing...
Tipo: Text
Palavras-chave: Scophthalmus maximus; Turbot; Biologie du sperme; Liquide séminal; Mobilité du spermatozoïde; Morphologie du spermatozoïde; Poisson marin; Scophthalmus maximus; Turbot; Sperm biology; Seminal fluid; Sperm motility; Sperm morphology; Marine fish.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/00188/29893/28334.pdf

A relationship between antimicrobial peptide gene expression and capacity of a selected shrimp line to survive a Vibrio infection
Provedor de dados: 5
Autores: De Lorgeril, Julien; Gueguen, Yannick; Goarant, Cyrille; Goyard, Emmanuel; Mugnier, Chantal; Fievet, Julie; Piquemal, D; Bachere, Evelyne.
Understanding of antimicrobial defence mechanisms of penaeid shrimp should help in the design of efficient strategies for the management and disease control in aquaculture. In this study, we have specifically analysed the expression in circulating hemocytes of antimicrobial peptides (AMPs) encoding genes, such as PEN2 and PEN3, ALF, crustin, lysozyme and a putative cysteine-rich peptide. We evidenced a relationship between the level of expression of some AMPs and the successful response of the shrimp, Litopenaeus stylirostris, to circumvent a pathogenic Vibrio penaeicida infection. Additionally, significant differences in some AMP transcript amounts are evidenced between control, non-selected shrimp line and the third generation breeding of shrimp selected...
Tipo: Text
Palavras-chave: Real time PCR; Cysteine rich peptide; Crustin; Anti LPS factor; Lysozyme; Penaeidins; Immune response; Vibrio penaeicida; Penaeid; Decapoda; Crustacean.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4524.pdf

Evaluación de los parámetros biológicos, fisiológicos, inmunológicos y nutricionales en camarones Litopenaeus stylirostris afectados por vibriosis
Provedor de dados: 5
Autores: Mugnier, Chantal; Justou, Carole; Lemonnier, Hugues; Patrois, Jacques; Ansquer, Dominique; Goarant, Cyrille; Lecoz, Jean-rené.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00354/46555/46366.pdf

Sediment accumulation in earthen shrimp ponds
Provedor de dados: 5
Autores: Lemonnier, Hugues; Brizard, Raphael; Herlin, Jose; Mugnier, Chantal.
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00354/46556/46367.pdf

Biological, physiological, immunological and nutritional assessment of farm-reared Litopenaeus stylirostris shrimp affected or unaffected by vibriosis
Provedor de dados: 5
Autores: Mugnier, Chantal; Justou, Carole; Lemonnier, Hugues; Patrois, Jacques; Ansquer, Dominique; Goarant, Cyrille; Le Coz, Jean-rene.
Shrimp aquaculture in New Caledonia is subject to seasonal mortalities during grow-out due to highly virulent Vibrio nigripulchritudo (Vn). To understand the mechanisms affecting shrimp resistance and leading to significant mortality, a shrimp ecophysiology and immunology survey was conducted on two farms, the first considered as a "control" farm (HC), the second affected by the disease (DF). Mortality observed during the survey at DF started 50 days after stocking and was typical of this disease. The main observations regarding shrimp were: (a) growth was not affected by the disease and was faster in the DF than in the HC pond; (b) disease did not affect one sex more than the other, or a specific part of the population in terms of weight; (c) the physical...
Tipo: Text
Palavras-chave: Vibriosis; Penaeid shrimp; Field survey; Physiology; Immunology; Nutritional status.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28764/27567.pdf

Physiological response of the blue shrimp Litopenaeus stylirostris to short-term confinement on a pond bottom
Provedor de dados: 5
Autores: Mugnier, Chantal; Lemonnier, Hugues; Legrand, Alexandre.
The blue shrimp Litopenaeus stylirostris was exposed to pond sediment for 48 h and its physiological response was studied in relation to molt stage. Shrimp were maintained in cages within a semi-intensive pond after 4 months of rearing. Hypoosmoregulatory capacity (hypo-OC), magnesium ions (Mg ions), glucose, total proteins and oxyhaemocyanin were assayed in haemolymph. An increase of 370% to 500% in Mg ions concentration and 200% to 266% in glucose concentration, and a decrease in hypo-OC in shrimp maintained close to the centre of the pond indicated a short-term stress response in all molt stages. Indicators of water and sediment pore water quality were within normal operating limits, however this area was characterized by high water content and...
Tipo: Text
Palavras-chave: Stress; Pond bottom; Penaeid shrimp; Molt stage; Haemolymph constituents; Litopenaeus stylirostris.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1675.pdf

Response of the blue shrimp Litopenaeus stylirostris to temperature decrease and hypoxia in relation to molt stage
Provedor de dados: 5
Autores: Mugnier, Chantal; Soyez, Claude.
The effect of different levels of dissolved oxygen (DO) and a decreased temperature combined with severe hypoxia were studied in the blue shrimp Litopenaeus stylirostris in relation to molt stage. In the first experiment, shrimps were submitted to DO concentrations of 5 to 1 mg l(-1). Osmoregulatory capacity (OC) was measured in shrimps at molt stage C after 6, 24, or 48 h of exposure. No mortality was recorded but a significant negative effect of DO concentration on hypo-OC was observed for DO concentrations below 3 mg l(-1). Osmoregulation improved after 48 h exposure, compared to 6 and 24 h exposure.   In a second experiment, temperature was decreased from 28 to 22 degreesC in 24 h, before a severe hypoxia of 0.5+/-0.1 mg O-2 l(-1) was applied....
Tipo: Text
Palavras-chave: Temperature; Stress; Penaeid shrimp; Osmoregulation; Molt stage; Litopenaeus stylirostris; Hypoxia.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-372.pdf

Metal and metalloid bioaccumulation in the Pacific blue shrimp Litopenaeus stylirostris (Stimpson) from New Caledonia: Laboratory and field studies
Provedor de dados: 5
Autores: Metian, Marc; Hedouin, Laetitia; Eltayeb, Mohamed M.; Lacoue-labarthe, Thomas; Teyssie, Jean-louis; Mugnier, Chantal; Bustamante, Paco; Warnau, Michel.
The present work aimed at better understanding metal and metalloid bioaccumulation in the edible Pacific blue shrimp Litopenaeus stylirostris, using both laboratory and field approaches. In the laboratory, the bioaccumulation kinetics of Ag, Cd, Co, Cr, and Zn have been investigated in shrimp exposed via seawater and food, using the corresponding gamma-emitting radiotracers (Ag-110m, Cd-109, Co-57, Cr-51, and Zn-65) and highly sensitive nuclear detection techniques. Results showed that hepatopancreas and intestine concentrated the metals to the highest extent among the blue shrimp organs and tissues. Moulting was found to play a non negligible detoxification role for Co, Cr and, to a lesser extent, Zn. Metal retention by L stylirostris widely varied (from...
Tipo: Text
Palavras-chave: Crustacean; Metals; Biokinetics; Radiotracers; Moulting; Contamination.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12528/9869.pdf

Combined effect of external ammonia and molt stage on the blue shrimp Litopenaeus stylirostris physiological response
Provedor de dados: 5
Autores: Mugnier, Chantal; Justou, Carole.
The effect of ambient ammonia and molt stage on the physiological response of the blue shrimp Litopenaeus stylirostris was studied. Shrimps were submitted to 54.6 mg l(-1) ammonia-N (1.76 mg l(-1) NH3-N) for 24 h. Only shrimps in stages C, D-0, D-1 and D-2 were used for the analysis. Haemolymph was assayed for osmoregulatory capacity (OC), magnesium ion (Mg ion), total proteins, oxyhaemocyanin, lactate and glucose. Molt stage had an effect on OC, Mg ion and total proteins in control shrimps, and on OC, Mg ion and lactate in treated animals. Ammonia treatment decreased OC and lactate, and increase Mg ion concentration in haemolymph, for all molt stages. It decreased significantly total proteins and oxyhaemocyanin for stages D-1 and D-2, and increased...
Tipo: Text
Palavras-chave: Stress; Peneid shrimp; Molt stage; Litopenaus stylirostris; Haemolymph constituents; Ammonia.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-371.pdf

Amélioration génétique expérimentale de la crevette d'élevage de Nouvelle-Calédonie : Sélection d'une population de L. stylirostris résistante à la bactérie pathogène Vibrio penaeicida. Rapport final pour le Ministère de l'Outre-Mer
Provedor de dados: 5
Autores: Goyard, Emmanuel; Goarant, Cyrille; Bachere, Evelyne; De Lorgeril, Julien; Mugnier, Chantal; Ansquer, Dominique; Broutoi, Francis; Brun, Pierre; Imbert, Frederic; Justou, Carole; Maillez, Jean-rene; Patrois, Jacques; Pham, Dominique; Peignon, Jean-marie.
The New-Caledonian shrimp industry is based on the controlled reproduction of the shrimp Litopenaeus stylirostris, a species which was introduced in the 80s. The major difficulty to which the industry has been faced for 10 years is the occurrence of the "syndrome 93", which corresponds to mortality phases when the temperature falls down in April-May-June. This mortality is associated to the pathogenic bacteria Vibrio penaecida and is expressed at different levels which are variable from year ta year and from pond to pond. No resistance to this pathology has been developed spontaneously. This is likely due to the protocole used to rear spawners, which does not allow to implement an efficient selective pressure at each generation  An experimental selection...
Tipo: Text
Palavras-chave: Amélioration génétique; P. styliroslris; Résistance; Syndrome 93; Lyzozyme; Genetic improvement; P. styliroslris; Résistance; Syndrome 93; Lyzozyme.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00109/22020/19643.pdf