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

NDP Marine Research Sub-Programme 2007-2013Clavochlamydia salmonicola, however their role in the development and progression of gilldisease has yet to be determined (Steinum et al. 2010).SummaryDevelopment of early warning systems and the employment of oceanographic tracking modelswould be advantageous to predict deleterious coastal blooms. Such advance warning wouldallow for more time to put a chosen management strategy in place (Table 2.1). Predictivemodels and mitigation techniques employed to minimise the harmful effects of algal blooms areinsufficiently advanced or developed to ensure the complete safety of aquaculture animals. Inaddition there is a significant lack of information and studies on the potential synergismsbetween the infectious agents mentioned above and their interactions with environmentalparameters and natural phenomena such as phytoplankton blooms and zooplankton swarms(Table 2.2).Table 2.1: Selected non-infectious gill disease conditions with research priorities (from Rodger et al.2011a).PhytoplanktonbloomsRisk Factors Potential Control PrioritiesGeographicallocationEnvironmentalconditionsRoutine monitoringOxygenation/aerationProtective penenclosuresBenefit or otherwise ofaerationIs gas supersaturationtriggered in someblooms?Submersion of pensDietary modificationsZooplanktonswarmsGeographicallocationEnvironmentalconditionsRoutine monitoringOxygenation/aerationProtective penenclosuresSubmersion of pensUse of bubble curtainsUse of flocculating agentsDevelopment ofpredictive modelsEarly warning systemsRelationship withpathogensSignificance of biofoulingorganismsTowing pens out ofbloomChallenge trials withsuspect organismsImproved mitigation ofimpact of swarms10