1 / 17

Gilthead Sea Bream

Gilthead Sea Bream . Taxonomy . Common Aquaculture Sea Bream -Family: Sparidae - Sparus aurata (Europe) - Pagrus major(Japan, China) - Diplodus sargus sargus (Europe) - Lithognathus mormyrus (China) - Diplodus puntazzo (Europe). Economic Importance . Important to European culture

penn
Download Presentation

Gilthead Sea Bream

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. Gilthead Sea Bream

  2. Taxonomy • Common Aquaculture Sea Bream -Family: Sparidae -Sparusaurata(Europe) -Pagrus major(Japan, China) -Diplodussargussargus(Europe) -Lithognathusmormyrus(China) -Diploduspuntazzo(Europe)

  3. Economic Importance • Important to European culture • Economy wise • Food

  4. Market Price • Europe 5.50€/kg for 350kg • Fry costs 0.28 euros • http://thecornishfishmonger.co.uk/shop/gilt-head-sea-bream-whole.html

  5. Market Locations • Greece- the largest producer • Spain • Italy • Turkey • France

  6. Origin • Mediterranean Sea • Eastern Atlantic Coasts: United Kingdom to the Canary Islands • Rare in Black Sea

  7. Life Cycle and Larval Stage • Protandrous (Male then female) • Male for two years of its life • Female for the rest • Spend their initial years in lagoons and estuaries

  8. Reproduction • Spawning season (October-December) • Move into deeper waters to give birth • In captivity -Photomanipulation(controlling the length of daylight) -Manipulating the water temperature

  9. Production Methods • Traditionally, they were cultured in coastal lagoons and brackish ponds, particularly in valliculture in northern Italy and in esteros in southern Spain • 1980- were reproduced in captivity • Hatcheries - Hatch in 48 hours • Nurseries • Semi-intensive • Intensive

  10. Extensive System

  11. Intensive System

  12. Feeding • Larva - Yolk (2-4 days) -Zooplankton and microalgae - Weaning(40-50 days) -50%-60% protein diet • Juveniles -Feed on larger protein pellets • Adults -Fishmeal and Fish oil - Some vegetable extract

  13. Water Chemistry and Environmental Requirements • Sensitive to low temperatures(4oC) • Brackish water • Needs light and social interaction with mates to determine reproduction • Optimal Water Temperature= 24-26ºC • 16-20 months growth • pH=8.5 • Salinity= 50nM

  14. Advantages • They are the tastiest of the sea bream family • Reproduction can be controlled • Can reproduce off-spawn season • Sold whole • Good FCR I may be ugly but at least I taste good!

  15. Disadvantages • If the Gilthead escapes from its cage, it could interbreed with wild Giltheads and corrupt the local food web • Become pests • Easily diseased • Hard to handle without killing it • Can disease wild sea bream if they pass by the cage • Due to high price, farmers have a difficult time to make a fair profit

  16. Thanks for listening!

  17. Any questions?

More Related