(Pacific white shrimp) FARM BIOSECURITY - Blue Archipelago

27 Pages·2010·4.65 MB·English

by  Nyan Taw

INTERNATIONAL CONFERENCE ON SHRIMP AQUACULTURE
SHRIMP (Pacific white shrimp) FARM BIOSECURITY:
PRACTICAL METHODS TO PREVENT VIRUS ENTERING
FARM AND QUARANTINE IF INFECTED TO PREVENT
FROM SPREADING.
Nyan Taw
Hang Tuah University,
Surabaya – INDONESIA
October 28-29, 2010
Introduction
The success or failure in shrimp aquaculture is how successful one can
prevent and control the viral (mainly WSSV) out breaks. Biosecurity had
been applied in Indonesia since introduction of L. vannamei from 2002
(Nyan Taw et al, 2002, 2007, 2008 & 2009; Nyan Taw, 2005 & 2010).
Most recently an article specifically on farm biosecurity will be published
in GAA November/December, 2010 issue (Nyan Taw, 2010b)
Most locations in Asia are not viral free. One must be able to operate
amid viral threats. One important factor is to understand the character of
virus you are trying to protect from. Biosecurity starts with quality of
farm design. This is followed by biosecure operation system. With quality
farm design, operation system and biosecurity awareness training, the
viral (WSSV) issue can be minimized.

What we are protecting from ?
WSSV
IMPORTANT POINTS TO FOLLOW
1. Biosecurity (Correct defination)
2. Know your enemy (Information)
3. Preventive measures (Information)
4. Implementation (Do it)
5. Timely (On time)
6. Strict discipline (No exceptions)
7. Be serious (Better safe then sorry)

WAF, AW & NT (2005 ) WAS Bali
Basic WSSV Characters
1. Mass mortality: DOC <45 days
2. Temperature >30 less prone; <29 more prone; <26 dangerous.
3. Onset of heavy rain (season) with low temperature trigger outbreaks.
Seasonal occurrence is well document.
4. Virus dies in free water in 72 hours
5. Crustacean are carrier (crabs) – lives with virus.
6. Virus lives in freshly dead, indefinitely in fresh processed frozen condition
7. Virus can live and survived after mortality Vannamei
8. Bacteria white patch (spots) on carapace can be mistaken as WSSV spots.

Farm Biosecurity - Factors
Farming Technology SPF Broodstock SPF Post Larvae (PL)
Reservoir system – module Use SPF broodstock from Healthy PLs from hatchery which
with quarantine & treatment certified Nucleus Breeding use NBC broodstock
ponds Center (NBC)
Stocking Density
Water borne
Pond Construction
Stocking density/ Energy input/
Crustaceans; Free living WSSV in
HDPE lined ponds Pond construction/system -
water; human and equipments.
balanced
Semi-lined ponds
Earthen ponds Land borne
Human transmission.
Carriers – crustaceans
People involved in farming
Farm Management crabs, human, domestic
(Technicians, workers, guests, etc)
and wild animals, etc
Follow strict biosecurity on
Environmental stress
the management system
Air borne
Minimize stress on shrimp in ponds.
Birds pickup infected dead or
Feed
Application of feeds, treatment of pond
live shrimp and drops into
water, paddle wheels in right place and
Do not use fresh feed - culture ponds; Human ?
in operation, high density without
trash fish, bivalves, etc.
appropriate energy input, etc.
Farm Biosecurity - Implementation
1. Use SPF post larvae (PL)
2. Use reservoir module system- water treatment system, operate as SOP
3. Balanced - stocking density, energy input, pond construction & system.
4. Use crab fence – all in place
5. Use bird scare lines - all in place
6. Control workers’ movement – farm/farm; module/module, row/row
7. No handling (touching) unnecessary – only person responsible can handle.
8. Minimize workers – minimum worker team: stocking, harvest, sampling.
9. Use chemical (sun drying) to disinfect all equipment– screen net, cast net, etc.
10.All equipment in operation – eg. PWAs, water pumps, siphon equipment, etc.
11. Educate people on biosecurity
12. Environmental cleanliness – Car dip, pond, water, housing, etc.
13. Control Human traffic– guest, workers, technicians, Management personal, etc.