Susceptibility variation to the main pathogens of Crassostrea gigas at the larval, spat and juvenile stages using unselected and selected oysters to OsHV-1 and/or V. aestuarianus.

Journal of Invertebrate Pathology
Lionel DegrémontMarie-Agnès Travers

Abstract

French commercial hatcheries are massively producing Crassostrea gigas selected for their higher resistance to OsHV-1, and soon should also implement selection for increasing resistance to Vibrio aestuarianus. The first objective of this study was to optimize the breeding programs for dual resistance to OsHV-1 and V. aestuarianus to determine the earliest life stage for which oysters are able to develop disease resistance. Wild stocks and selected families were tested using experimental infections by both pathogens at the larval, spat and juvenile stages. Oyster families could be evaluated for OsHV-1 as soon as the larval stage by a bath method, but this only highlighted the most resistant families; those that showed the highest resistance to V. aestuarianus could be determined using the cohabitation method at the juvenile stage. The second objective of this study was to determine if selection to increase/decrease the resistance to OsHV-1 and V. aestuarianus could have an impact on other major pathogens currently detected in hatchery at the larval stage, and in nursery and field at the spat/juveniles stages (V. coralliilyticus, V. crassostreae, V. tasmaniensis, V. neptunius, V. europaeus, V. harveyi, V. chagasi). No relationshi...Continue Reading

References

Jun 24, 2004·Diseases of Aquatic Organisms·Mélanie GayFrédérique Le Roux
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Dec 10, 2014·The ISME Journal·Astrid LemireFrédérique Le Roux
Jun 4, 2015·Journal of Invertebrate Pathology·Lionel DégremontStandish K Allen
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Feb 24, 2018·G3 : Genes - Genomes - Genetics·Alejandro P GutierrezRoss D Houston
Jul 6, 2018·Environmental Microbiology·Leila ParizadehMarie-Agnès Travers

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Citations

Sep 17, 2021·Microbiology Resource Announcements·Gracinda M M Sanches-FernandesRodrigo Costa

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