1 / 21

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.

truman
Download Presentation

Sea Bass Aquaculture

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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.

More Related