what is seed transportation?......(Transportation and Acclimatization of Fish Seeds)

 

Transportation and Acclimatization of Fish Seeds

Key Concepts

• Dissolved Oxygen (DO): Essential for fish survival during transportation.
• Volume of Water (V): Measured in liters, affects the concentration of oxygen.
• Rate of Oxygen Consumption (C): Measured in mg/kg/hour, indicates how much oxygen fish seeds use.
• Period of Transportation (h): Duration in hours that fish seeds are transported.

Transportation Methods

• Oxygen Packing: Best method for transporting fish seeds.
• Anaesthetics: Used to minimize metabolic activities, reducing nitrogenous waste excretion.
• Sunlight Protection: Avoid direct sunlight on packing bags to maintain temperature.

Packing Techniques

• Wet Gunny Bags: Cover seed packing bags to keep temperatures low.
• Glucose Powder: Can be added for long-distance transport to provide energy.

Ammonia Management

• Toxic Ammonia Removal: Use absorbents to reduce ammonia levels by 50% during 24-hour transport.
• Materials:
• Synthetic amberline resin
• Pulverized earth
• Permutile
• Sodium Phosphate: 2 g/l as a buffer
  

Acclimatization Process

1. Transport: Use closed polythene bags carried in cushioned bamboo baskets.
2. Temperature Balancing: Upon arrival, place bags on the water surface to equalize temperatures.
3. Condition Check: Assess seeds for:
• Position
• Swimming behavior
• Resting behavior
• Agility
• Reaction to light
• Dead individuals
4. Release Procedure
• Open bags after 5-15 minutes when temperatures are balanced.
• Gradually add receiving pond water to transport water before releasing fish.

Disinfection and Monitoring

• KMnO4 Application: Apply 1-2 ppm in the pond area where seedlings are introduced for disinfection.
• Hapa Monitoring: Introduce seedlings into a small hapa for close monitoring before final release into the pond after 2-5 hours.

Final Release Steps

• Gradual Water Mixing: While releasing from the truck, gradually add receiving pond water to the transport water.
• Acclimatization: Wait 15-20 minutes before slowly releasing fish seedlings into the pond using a small hapa or scoop net.