. Additional Nutritional Factors Water Quality Action and Reaction Water Quality Management and Biofilter Maintenance Post larval fitness parameters YOU ARE IN HEALTH MANAGEMENT Risk Management, Bio-security and HACCP Implementation System Disinfection Procedures Record Keeping and Report Templates
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. Stress Test for Post Larva Used to measure the fitness of a population of post larvae prior to sale or stocking in grow-out. Equipment Required: 100 post larvas. Centigrade thermometer. Refractometer. Saltwater 32-34ppt. Freshwater 0-1ppt. 10-15 litre bucket. Procedure: Two Parameter Test (temperature and salinity). Fill the 10-15 litre bucket with water at 22°C and 5ppt salinity. Measure and record temperature and salinity from the larval tank (normally at 27-28°C and 32-34 ppt). Randomly collect 100 postlarvae from the tank and transfer into the test bucket. Hold for one hour and count the number of survivors (those that respond and swim normally when stimulated). Eighty percent or more active indicates the population has passed the test. Single Parameter Test (salinity). Fill the 10-15 litre bucket with water at 27-28°C and salinity at 0-1 ppt. Measure and record temperature and salinity from the larval tank (normally at 27-28°C and 32-34 ppt). Randomly collect 100 postlarvae from the tank and transfer into the test bucket. Hold for one hour and count the number of survivors (those that respond and swim normally when stimulated). Eighty percent or more active indicates the population has passed the test. If the postlarvae do not pass the stress test then conditions need to be improved prior to a retesting. |
. HEALTH MANAGEMENT & DISEASE CONTROL INDEX Variables to be used in health evaluation Health evaluation tests Shrimp Diseases Disease control . |
