Consulta: creatorFacets:"Dufour, Robert"
Registros recuperados: 7
Data/hora: 01/06/2024 18:58:10

DEDUCTION : A research project for shrimp farming sustainability in New-Caledonia
Provedor de dados: 5
Autores: Beliaeff, Benoit; Chim, Liet; Della Patrona, Luc; Goyard, Emmanuel; Herlin, Jose; Labreuche, Yannick; Walling, Emilie; Ansquer, Dominique; Brun, Pierre; Castex, Mathieu; Coatanea, Denis; Courties, Claude; De Lorgeril, Julien; Dufour, Robert; Frappier, Julie; Goarant, Cyrille; Huber, Matthias; Lemaire, Pierrette; Lemonnier, Hugues; Loubersac, Lionel; Le Roux, Frederique; Lucas, Ronan; Patrois, Jacques; Peignon, Jean-marie; Pham, Dominique; Ramage, Yannick; Soulard, Benoit; Vic, Marlene; Vourey, Elodie; Wabete, Nelly.
New Caledonian shrimp farming feasibility studies started in the mid-seventies. Today ca. 2000 tons of Litopenaeus stylirostris, introduced in 1978, are semi-intensively produced each year. Since fifteen years, production has been impacted by two seasonal vibriosis, the “Summer” syndrome caused by Vibrio nigripulchritudo in relation to pond bottom and water column quality, and the “Winter Syndrome” caused by Vibrio penaeicida in relation to drastic temperature drops . With the ambition of elucidating processes possibly leading to mortality outbreaks in ponds, Ifremer has been conducting a research program since 2003 under the DESANS project (2003-2006) and the present DEDUCTION project, equally funded by the South and North Provinces and by the Government...
Tipo: Text
Palavras-chave: Shrimp farming; Technical and scientific support; Vibriosis; Water quality; Pathology; Ecophysiology; Genetics; Zoosanitary monitoring and procedures; Multifactorial and multidisciplinary approach.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00143/25438/23591.pdf

Responses of Planktonic Microorganisms from Tropical Reservoirs to Paraquat and Deltamethrin Exposure
Provedor de dados: 5
Autores: Leboulanger, C; Bouvy, M; Pagano, M; Dufour, Robert; Got, P; Cecchi, P.
This study focused on the effects of two pesticides, paraquat (herbicide) and deltamethrin (insecticide), which are two common molecules used intensively in Burkina Faso. Natural bacterial populations, phytoplankton cultures (one cyanobacterium, Cylindrospermopsis raciborskii, and one chlorophycea, Monoraphidium sp.), and two species of zooplankton (Diaphanosoma excisum and Moina micrura) were isolated from aquatic communities and were used as biological targets in the experimental protocols. Paraquat was moderately toxic to bacteria and phytoplankton, whereas deltamethrin was significantly toxic only to the zooplankton species. Paradoxically, the chlorophycea Monoraphidium sp. exhibited a significant increase of in vitro fluorescence after 48 h at the...
Tipo: Text
Palavras-chave: West Africa; Reservoirs; Planktonic organisms; Deltamethrin; Paraquat.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-5287.pdf

Sécurisation des souches de crevettes d’élevage en Nouvelle-Calédonie. Résultats de la quarantaine et du conservatoire expérimental. Eléments pour la définition d’une stratégie de sécurisation des souches de crevettes en Nouvelle-Calédonie
Provedor de dados: 5
Autores: Patrois, Jacques; Goyard, Emmanuel; Peignon, Jean-marie; Dufour, Robert; Ansquer, Dominique.
A new strain of L. stylirostris was introduced in New Caledonia. Quarantine facilities were set up inland using RAS and artificial seawater. After 5 months of rearing, all the 16 initial families were still represented with a 50% average survival. Three samplings for known pathogens were made during that period, all of them negative. Half the animals were taken to outdoor ponds for rearing to reproduction size when the rest was used to test different arrangements for a biosecure rearing until reproduction.  Numerous spawnings and nauplii were obtained but larval rearings could not be completed. Different options are considered for the set up of a biosecure facility allowing the rearing and the breeding of pathogen free strains of shrimp.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00117/22849/20659.pdf

Amélioration génétique pour la résistance au Syndrome 93 : bilan de 5 générations de sélection expérimentale
Provedor de dados: 5
Autores: Goyard, Emmanuel; Ansquer, Dominique; Brun, Pierre; De Decker, Sophie; Dufour, Robert; Goarant, Cyril; Patrois, Jacques; Peignon, Jean; Pham, Dominique.
Selective breeding of shrimp for viral resistance is established for species like L. vannamei and L. stylirostris. However, selection for bacterial infection resistance is not documented. In New Caledonia, "Syndrome 93" is a vibriosis that affects cultured shrimps during the cool season with survival from 15 to 30%. Current practises for breeders rearing at low densities do not improve the resistance of the offsprings mainly because selection pressures for "Syndrome 93" are low. Even after the fifth generation, survival improvement is not significant.
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00117/22848/20658.pdf

Reproduction of the hawaiian strain of pacific blue shrimp Litopenaeus stylirostris in New Caledonia.
Provedor de dados: 5
Autores: Pham, Dominique; Patrois, Jacques; Goyard, Emmanuel; Maillez, Jean-rene; Broutoi, Francis; Dufour, Robert; Peignon, Jean-marie; Brun, Pierre; Lambert, Christian; Pita, Etienne.
The Pacific blue shrimp Litopenaeus stylirostris was introduced in New Caledonia thirty years ago. Because of its high inbreeding, a SPF strain domesticated in Hawaii, genetically differentiated from the Caledonian strain, had to be imported. The two strains’ reproductive performances were compared at different periods and cross breedings were assessed. The average results show that Caledonian animals give twice as many nauplii than the Hawaiian animals. The best cross breeding is obtained with Caledonian male x Hawaiian female. A possible explanation is the later age or weight of maturity for the Hawaiian strain compared to the Caledonian strain, difference which could come from the geographical origins and/or the zootechnical and climatic domestication...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00198/30881/29249.pdf

Etude du remplacement des proies vivantes en élevage larvaire de Penaeus vannamei par les aliments de la gamme Frippak
Provedor de dados: 5
Autores: Le Moullac, Gilles; Dufour, Robert; Aquacop.
Le CAR (Crustacean Algae Replacement) se substitue totalement aux algues pour un dosage et une fréquence de distribution déterminés. Les résultats de survie à Zoé3 restent malgré tout variables. La raison essentielle semble être la qualité bactériologique de l'eau de mer. Les artémias peuvent être remplacés à 50% par du CD3 (Crustacean Diet), ce taux de substitution offre le meilleur compromis survie et qualité des PL.
Tipo: Text
Palavras-chave: P. vannamei; Microcapsules; Larves; Qualité; Proies vivantes.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00176/28733/27201.pdf

Cross breeding of different domesticated lines as a simple way for genetic improvement in small aquaculture industries: Heterosis and inbreeding effects on growth and survival rates of the Pacific blue shrimp Penaeus (Litopenaeus) stylirostris
Provedor de dados: 5
Autores: Goyard, Emmanuel; Goarant, Cyrille; Ansquer, Dominique; Brun, Pierre; De Decker, Sophie; Dufour, Robert; Galinie, C; Peignon, Jean-marie; Pham, Dominique; Vourey, Elodie; Harache, Yves; Patrois, Jacques.
Two populations of the Latin American shrimp Penaeus (Litopenaeus)stylirostris domesticated in Hawaii and in New Caledonia were previously shown to be genetically differentiated and proven highly inbred. In New Caledonia, where different Vibriosis affect shrimp production and antibiotic use is banned in growing ponds, the Hawaiian population was introduced to increase the allelic variability available for local shrimp farmers and start a genetic improvement program. Growth and survival rates of the two pure populations and the two-way F-1-hybrids obtained by breeding Hawaiian animals with New Caledonian animals were assessed in several simple experiments (earthen ponds, floating cages and experimental infection challenges) during two years on two...
Tipo: Text
Palavras-chave: Vibriosis; Survival; Growth; Penaeus Litopenaeus stylirostris; Shrimp; Cross breeding; Genetic improvement.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4316.pdf