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Sea Bass Aquaculture

Sea Bass Aquaculture . John Lawson. Species of Sea Bass Grown in Aquaculture . Lutes c alcarifer , Barramundi Dicentrarchus labrax , European Sea Bass Lateolabrax japonicus , Japanese Sea Bass Dicentrarchus punctatus , Spotted Sea Bass Centropristis striata , Black Sea Bass.

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Sea Bass Aquaculture

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  1. Sea Bass Aquaculture John Lawson

  2. Species of Sea Bass Grown in Aquaculture • Lutes calcarifer, Barramundi • Dicentrarchuslabrax, European Sea Bass • Lateolabraxjaponicus, Japanese Sea Bass • Dicentrarchuspunctatus, Spotted Sea Bass • Centropristisstriata, Black Sea Bass

  3. Lutes calcarifer, Barramundi

  4. Dicentrarchuslabrax, European Sea Bass

  5. Lateolabraxjaponicus, Japanese Sea Bass

  6. Dicentrarchuspunctatus, Spotted Sea Bass

  7. Centropristisstriata, Black Sea Bass

  8. Economical Importance • High market value, more expensive than other fish. • Grown in countries bordering the Mediterranean Sea, Western Pacific, Indian Ocean, and along the Atlantic Coast. • No more than $10.00 per a pound. • Economically important food fish all over the world depending on where they are grown and which species. • Marketable size fish is around 300-600 grams depending on species. • For European Sea Bass annual production is around 60,000-65,000 tons.

  9. Life Cycle and Larval Stages • Fertilized eggs need 13 to 15 hours in 29 to 31 degrees Celsius seawater in order to hatch. • Larva at 2.05 mm (1 day after hatching). Yolk absorbed. • Larvae at 3.60 mm (10 days after hatching). • Juveniles at 5.5 mm (18 days after hatching).

  10. Life Cycle and Larval Stages 2

  11. Reproduction in Captivity

  12. Production Methods • Hatchery • Broodstock/Spawning Tanks – wild caught sea bass or ponds/cages. Used for reproduction of sea bass. • Incubation Tanks – store and help fertilized eggs produce into larvae. • Rearing Tanks – large enough larvae are transferred here for growth until they are large enough to be place in cages or ponds. • Factors • Species • Production Target • Level of Financial Input • Salinity most have minimal fluctuation (28-32ppt) • Site needs to be near sandy or rocky shore • Spacious, flat, minimal water movement

  13. Hatchery Broodstock/Spawning Tank Incubation Tank Larval Rearing Tank

  14. Production Methods 2 • After larvae have grown to large enough size. • Nursery – for juveniles that are 1-2.5cm in length. • Nursery Pond – pond culture specifically for juveniles. • Nursery Net/Cage – net or cage specifically for juveniles. • Concrete Tanks – should be avoided. • Grow Out – juveniles reaching 8-10cm to market size. • Cages – floating cages and stationary cages. • Ponds – monoculture and polyculture. • Intensive

  15. Nursery Nursery Pond Nursery Cage

  16. Grow OutCages Stationary Cage Floating Cage

  17. Grow OutPonds

  18. Feeds and Feeding • Larvae < 2.05mm – yolk sac • Larvae > 2.05mm – zooplankton and phytoplankton such as diatoms, algae, small shrimp, and small fish. Rotifer and brine shrimp are commonly used as feed. • Juveniles – Chopped up trash fish or brine shrimp. • Adults – Chopped up trash fish.

  19. Feed and Feeding Rotifer Brachionusplicatilis Brine Shrimp Life Cycle Artemia

  20. Water Chemistry and Environmental requirements • pH – 7.5 to 8.5 • Dissolved Oxygen – 4 to 9 ppm • Salinity – 10 to 30 ppt • Temperature – 26 to 32 °C • NH3– less than 1 ppm • H2S – less than 0.3 ppm • Turbidity – less than 10 ppm

  21. Advantages vs. Disadvantages • Advantages • High market value. Economically important food fish around the world. • More expensive than other types of fish. • Variety of cultures used for growth. • Large production rate. • Can live in catadromous habitats. • Disadvantages • High levels of management. • High operating cost. • Land cost to start aquaculture farm is high. • High labor and equipment cost. • Cannibalism at young age. • Breed during Winter and Spring. • Inconsistent supply of fry collected from wild. Hard to start culture. • Low survival rate for young. • Food for larvae hard to manage. • Culture cropping period 6 months at 2 cropping per a year.

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