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Handling of Fish After Unloading
Icelandic International Development Agency (ICEIDA)
Iceland
United Nations University Fisheries Training Programme (UNU-FTP)
Iceland
National Aquatic Resources Research and Development Agency (NARA)
Sri Lanka
Department of Fisheries and Aquatic Resources (DFAR)
Sri Lanka
Quality and safety issues in fish handling-----
A course in quality and safety management in fishery harbours in Sri Lanka
NARA, DFAR, ICEIDA and UNU-FTP
Content• This lecture contains:
• information regarding current handling practices for fish at and around fishing harbours in Sri Lanka
• methods to improve the quality of the fish handled are introduced
• possible role of the harbours
Learning objectives
• After this lecture the participants will have:• an overview of the situation in Sri Lanka harbours
regarding handling after unloading• ideas on how to improve the situation
Process Flow DiagramLanding and distribution of fish in fishery
harbour Fish in the hold (box or hold)
Unloading
Washing
Deliver to the auction hall / pier
Auctioning
Cutting Re-loading
Consumer Re-icing
Transport
Consumer
Video showing harbour activities
Video
Fish in the hold – current practices
• Fish kept in melted water – not using bilge pump
• Ice clumping
• Loosening ice with harbour water
• No sorting• by species• by catching day
• Food kept in the hold – chicken etc.
Fish in the hold – Improvements
• Use boxes for the fish
• Use day labelling
• Make sure drainage from the boxes is good and use bilge pump• introduce false bottom in hold ?
• Food should be kept in closed boxes
Unloading - current practices
• Fish is unloaded straight onto the pier and mostly by hand
• The pier is highly contaminated due to unwanted human activities
• The pier is used for auctioning in some cases
• The pier is used for packaging fish for transport
• Video
Unloading - improvements
• Fish must be unloaded on to pallets or to/in suitable containers
• The pier must be cleaned with potable water of suitable pressure (20-70 bar)
• Zoning should be implemented for the pier• unloading area• washing area• berthing area• loading area (food, ice, oil, water etc..)
Washing – current practices
• Fish is often washed with contaminated harbour water
• Fish is often put straight onto the pier concrete and splashed with harbour water for better appearance before sale
• Equipment, containers and pallets are often washed with harbour water
• Water used for washing fish is not changed frequently
Washing - improvement
• Fish must be washed using potable / clean sea water• Harbour water is not acceptable for celaning and
washing as the water is highly contaminated• All equipment, containers and pallets should be
thoroughly washed• using potable / clean sea water of appropriate pressure
• using suitable cleaning agents
Washing - improvement
• Blood with melted ice and dirty slime layer should be removed by washing
• Running water is recommended for washing • If water used for washing is in a box, tray or any
other container, water must be changed frequently
• Care should be taken to prevent cross contamination during washing
Washing - improvement
• If fish is landed iced in boxes there should be no need to wash it before transport
Preparing for the auction – current practices
• Designated auction area is not always used for auctioning
• Fish from boats further from the pier sometimes gets rough handling
• Fish is usually delivered by hand, not in boxes
Preparing for the auction - improvements
• Fish should not be dragged on the pier floor, and suitable containers / carts should be used
• Fish should not be damaged during unloading and delivery by rough handling
• Minimum handling will reduce the risk of cross-contamination and physical damage
Auctioning – current Auctioning – current practices
• Fish is sold straight from the pier / concrete Fish is sold straight from the pier / concrete
• Unrelated traffic (people and vehicles) in the Unrelated traffic (people and vehicles) in the auctioning area auctioning area
• Auctioning takes too long Auctioning takes too long
• Temperature abuseTemperature abuse
Auctioning - Auctioning - improvements
• Pallets or boxes should be used during Pallets or boxes should be used during auctioningauctioning
• Temperature abuse can be minimized by Temperature abuse can be minimized by • using iceusing ice• shortening the auction timeshortening the auction time
• Zoning should be implemented to reduce Zoning should be implemented to reduce traffictraffic
Re-loading – current practices
• Reloading outside of designated area• Inappropriate vehicles used for transport• Icing not done correctly or at all• Inside of vehicles
• cross-contamination from feet / footwear
• containers / boxes• unsuitable material
• dirty, damaged
• reuse of polystyrene
Re-loading - improvements
• Zoning should be applied to the transport area• Use insulated boxes / insulated or refrigerated
vehicles• Polystyrene (rigifoam) and wooden boxes should be
lined with plastic bags • Ice should be available at the harbour premises• Re-icing must be done as soon as possible according
to transportation time using fresh ice
Re-loading - improvements
• Boxes / vehicles should not be over- or under-loaded
• Use separate footwear inside trucks
• Practice careful handling of fish
• Avoid unnecessary handling
• Fish should be transported separately from other items (tools, boxes etc..)
Transportation – current practices
• Many different types of transport• Refrigerated trucks• Unrefrigerated trucks• Three wheelers• Motorbikes• Bicycles
Transportation - improvements
• Keep fish cool during transport• shield from direct sunlight
• Use clean packaging and vehicles
• Quick transport• Vehicles should leave as soon as they are ready
Cutting – current practices
• Not following hygienic practices • cleaning with harbour water • wooden cutting boards, difficult to clean• no waste bins
Cutting - improvements
• Access to potable water
• Clean / scrape and disinfect wooden surfaces
• Waste bins at each table
Some examples of how hygienic handling, gutting and careful handling can affect quality
2
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0 3 6 9 12 15 18 Days in Ice
Normal Handling
Aseptic Handling
Clean Handling
Effect of Hygienic Handling on Bacterial Number
0
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2
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0 3 6 9 12 15
Normal Handling
Clean Handling
Aseptic Handling
Quality Score
Days in Ice
Effect of Hygienic Handling on Quality Score
0123456789
2 5 90123456789
2 5 9
Gutted
Un-gutted
Effect of Gutting on Quality Score
Days Days
Cooked FilletRaw FilletScore Score
0
1
2
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2 5 9 120
20
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60
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120
2 5 9
Emptied GutGut ContentFilletLiver
TVA mEg/100g TVB mN/100g
Days Days
Development of Volatile Acids and Bases
Un-gutted Cod