No. 12. GILPAT.pdf - Marine Institute Open Access Repository

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Appendix I: Project Outputs ............................................................................................. 60Appendix II: Atlantic Salmon paramyxovirus Assay ..................................................... 64Appendix III: Neoparamoeba perurans Assay .................................................................. 66Appendix IV: Tenacibaculum maritimum Assay .............................................................. 68Appendix V: Piscichlamydia salmonis Assay ..................................................................... 70Appendix VI: Desmozoon lepeophtheirii Assay ................................................................ 72References............................................................................................................................. 74
NDP Marine Research Sub-Programme 2007-2013EXECUTIVE SUMMARYThe role of jellyfish as causative agents of gill disorders and mortalities in marine-farmed finfishhad received very little attention until the advent of the GILPAT project. Without knowledgeof the abundance, distribution, and seasonality of the detrimental jellyfish species aroundaquaculture sites an understanding of such interactions cannot be developed. There arenumerous species of jellyfish throughout our coastal waters capable of forming high densityblooms, however their potential to cause gill damage remains largely unknown. It was the aimof this project (GILPAT) to begin an investigation into the jellyfish species found around thecoast of Ireland and their potential impact on the finfish aquaculture industry. Thereforeextended targeted monitoring of the health of marine-farmed fish and jellyfish populations, incombination with the development of controlled experimental studies, were performed to gaina more comprehensive understanding of mechanisms behind jellyfish-induced gill disorders. Inaddition to this a range of molecular diagnostic methods were developed and used to screenfarm samples for potential pathogens which have been linked to the development of gill diseasein other countries.This project has resulted in 14 peer-reviewed publications (either published, in press oraccepted) and a PhD thesis. Work from GILPAT has been presented at a range of internationalmeetings including those organised by the European Parliament, European Association of FishPathologists, and the Fish Veterinary Society. A number of training workshops were also heldfor industry at the Marine Institute and the National Maritime College of Ireland.Literature reviews and epidemiological investigationsA review of the literature highlighted the large knowledge gaps which exist at present. Gilldisease is a multi-factorial condition occurring due to the interactions of particularenvironmental conditions, the presence of phyto/zooplankton blooms, and pathogen (viral,bacterial or parasitic) involvement. The Marine Institute’s phytoplankton monitoringprogramme provides a lot of information on the occurrence and distribution of these species,however there is no current programme available for zooplankton/jellyfish species. There isalso little known about the prevalence and role played in gill disease by pathogens such as thebacterium Tenacibaculum maritimum, and the parasite Desmozoon lepeophtherii. Epitheliocystisalso appears to be linked to gill disease, but it has yet to be established whether this is aprimary or secondary factor.An epidemiological investigation highlighted gill disease as a significant cause of mortality, itresulted in fish welfare challenges and gave rise to loss of growth in the majority of the marinei
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