First in the World. Harvest of Bubara / Caranx ignobilis Fish Eggs

Summary

This video outlines the harvesting process of Bubara fish eggs, which can only be collected during the full moon. Initially bred with hormones, Bubara fish are now spawning naturally at the Ambon Sea Aquaculture Fisheries Center. The process includes careful collection and selection of eggs based on their quality, characterized by transparency and buoyancy. Fertilized eggs float, while unfertilized ones sink. After harvesting, the eggs are transferred to a hatching tub for further growth. Notably, Bubara fish exhibit protandrous hermaphroditism, starting as males and becoming females as they grow, adding complexity to the spawning process.

Takeaways

• 🌕 Bubara fish lay their eggs during the full moon, making timing critical for harvesting.
• 🐟 Successful natural spawning of bubara fish has been achieved at the Ambon Sea Aquaculture Fisheries Center.
• 🔬 Eggs harvested are collected in a temporary container for selection of the best quality.
• 👩‍🔬 Good quality bubara fish eggs are transparent and float on the water surface, while unfertilized eggs sink.
• 🐠 Optimal breeding ratio is one female to two males to ensure better fertilization.
• 📏 Mature female bubara fish weigh over 10 kg, while males weigh between 6-8 kg.
• ⏰ Harvesting should occur before 9 AM to ensure high-quality eggs before the sun rises too high.
• 💧 Harvested eggs are maintained in a tub that holds 30 tons of water for optimal conditions.
• 🐣 Bubara fish exhibit protandrous hermaphroditism, starting as males and later becoming females as they grow.
• 👥 The larval rearing team is responsible for handling the eggs after harvesting.

Q & A

What is the optimal time to harvest Bubara fish eggs?

The harvest process must be done before 9 am to ensure the eggs are of the highest quality.

How often can Bubara fish eggs be harvested?

Bubara fish lay their eggs only during the full moon, so harvesting can only occur at that time.

What has changed in the spawning process for Bubara fish?

Initially, Bubara fish were bred with the help of hormones, but they have now succeeded in spawning naturally.

What are the distinguishing features of high-quality Bubara fish eggs?

Good quality eggs are transparent or colorless and will float on the surface of the water, whereas unfertilized eggs are opaque and settle to the bottom.

What is the significance of the size ratio between male and female Bubara fish in breeding?

The recommended breeding ratio is one female to two males to ensure better fertilization and higher quality eggs.

What is the size range of adult Bubara fish for breeding?

Females should be above 10 kg, while males should weigh between 6-8 kg.

What happens to the eggs after they are harvested?

The harvested eggs are placed in a container for temporary accommodation before being taken to a hatching tub.

What is the initial phase of Bubara fish development post-hatching?

After hatching, the Bubara fish larvae are maintained until they reach a size of about 3 cm before entering the next maintenance phase.

What is the unique reproductive characteristic of Bubara fish?

Bubara fish are protandrous hermaphrodites, meaning they start as males and can become females as they grow.

What is the role of the larval rearing team in the harvest process?

After the eggs are harvested, they are handed over to the larval rearing team for further care and maintenance.