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marinescotlandscience

Where is Sea Lice Research Required?Rob Raynard

Sea Lice Multination

Gordon Ritchie - MHKjell Maroni - FHFRandi Grontvedt - NVI

http://www.lusedata.no/Sider/FaktaTema.aspx?Tema=Sea%20lice%20multination

Medicine as control

1990 1995 2000 2005 2010 2015

Other methods of control

Sustainable control

Integrated Pest Management

• Strategic use of a number of measures to provide sustainable control – combine good husbandry/management practices &

biological control– optimise the effectiveness of available medicines– avoid resistance development– prolong the market life of medicines– minimise environmental inputs– With focus on ;

• 1.Preventative measures• 2.Strategic and coordinated measures

Integrated Pest Management - 5 Critical Measures

1. Well defined operational plans, biosecurity plans etc.

2. Monitoring – lice identification, medicine resistance monitoring..

3. Management by prevention– Good husbandry and management– Biological approaches– Alternative technologies

4. Optimise medicinal control

5. Coordinated measures

Validation & implementation of all mitigating measures

R&D

Development of best Integrated Pest Management Procedures

Broad implementation

Research needs - output from 2nd multination meeting

1. Structural measures and dispersion modelling– Aim: To develop scenario testing and decision support tools

for a strategic approach to integrated pest management• Optimising use of assets in sea lice control• Modelling tools to predict best production plans with

deployment of cages and treatment/control strategies• Need for data and new knowledge includes;

• Oceanographic data• Sea lice data on farms• Sea lice biology• Treatment data

Research needs

2. Farming and use of cleanerfish– Intensive culture– Sustainable capture fishery– Sustainable use– Fish health and welfare

Research needs

3. Biological measures and molecular knowledge building– Aim: Sea lice control that involves the use of measures

which exploit aspects of the parasite or host biology or environment

• In-feed supplements• Vaccines• Breeding resistant salmon

Research needs

4. Use of medication– Aim: Ensure that re-infection only occurs from wild source sea

lice i.e. no added risk of lice infestation from fish farm• Integrated Pest/Resistance management• Minimal use of therapeutants• Optimal use of therapeutants

– Assess treatment efficacy– Sensitivity testing– Technology development of bath and in-feed treatments– Generic best practice for sea lice control– Optimal intervention strategy – treatment thresholds, timing and

size of management areas

5. Access to effective range of medicines

Research needs

6. Resistance and surveillance– Aim: Standardisation of lice surveillance methods for

counting lice and assessing treatment efficacy• International standard• Surveillance in wild fish• Measuring treatment efficacy• Comparable bioassay protocols• Pen-side bioassay kits• Integration of data and systems enabling analysis

within regions and comparison across regions

7. Novel non-medical technologies

• Examples– Lights– Depth– Physical removal

Prioritised knowledge Gaps

1. Spatial distribution for development of IPM decision support. Farmed and wild interactions.

2. Sustainable use of wrasse.

3. Host pathogen interaction, resistant fish, immune modulation.

4. Optimal use of medicines.

5. International “meta data” standards enabling comparison of lice counts and bioassay data within and between regions.

6. Validation of novel non-medical controls.