Larval and Juvenile Management Quiz

What is the purpose of the harvesting and stocking of larvae?

• To prepare the larval and juvenile rearing system

• To manage water quality

• To provide nutrition to the larvae

• To control the size of the stocked larvae

Which technique can be used to harvest actively swimming larvae?

• Swimming out technique

• Chemical separation technique

• Siphoning technique

• Automatic separation technique

What is the recommended stocking density for Clarias gariepinus?

• 100-200/m2

• 50-100/m2

• 100-200/tonne

• 30-50/m2

What is the purpose of weaning in fish larvae?

• To transition from live food to processed feed

• To separate healthy fry from infected fry

• To control the size of the stocked larvae

• To improve water quality in the rearing system

What is the recommended feeding frequency for small size fish larvae?

• 3-4 times daily

• 1-2 times daily

• Once a day

• Every other day

What is the purpose of purging in fry management?

• To remove waste feed from the tank

• To separate healthy fry from infected fry

• To improve water quality in the rearing system

• To prevent cannibalism among the fry

What is the recommended method for transporting fry?

• Open method with continuous aeration

• Closed method with plastic bags and oxygen

• Transporting fry in a tank with sedative water

• Transporting fry in a tank with water stabilizers

What is the purpose of acclimatization when receiving fish or fry?

• To reduce stress and adjust to the new environment

• To separate healthy fry from infected fry

• To control the size of the stocked larvae

• To improve water quality in the rearing system

What is the recommended temperature for transporting fry?

• Same as the receiving water temperature

• Higher than the receiving water temperature

• Lower than the receiving water temperature

• Does not matter as long as the fry are packed properly

What is the purpose of using iodine-free salt when transporting fry?

• To reduce stress and promote natural slime coating

• To separate healthy fry from infected fry

• To control the size of the stocked larvae

• To improve water quality in the rearing system