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Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
Aquaculture systems
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Aquaculture systems

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Transcript

  • 1. Aquaculture Systems Current Events: A vaccine for Ich
  • 2. Types of systems <ul><li>Cage </li></ul><ul><li>Raceway </li></ul><ul><li>Pond </li></ul><ul><li>Recirculating Tanks </li></ul>
  • 3. Cage <ul><li>Can move cage to fresh water </li></ul><ul><li>Fish can escape </li></ul><ul><li>Fish can be stolen/released </li></ul>Movie
  • 4. Raceway <ul><li>Need constant flow of water </li></ul><ul><li>Generally built parallel to rivers </li></ul><ul><li>Necessary for trout </li></ul><ul><li>High water quality </li></ul>
  • 5. Pond <ul><li>Most common method </li></ul><ul><li>Large scale production </li></ul><ul><li>Lowest maintenance </li></ul>
  • 6. Recirculating tanks <ul><li>Uses least amount of water </li></ul><ul><li>Best Temperature control </li></ul><ul><li>Lowest water quality </li></ul>
  • 7. Recirculating Tanks <ul><li>Main Tank </li></ul><ul><li>Bio Filters </li></ul><ul><li>Sediment Tank </li></ul><ul><li>Pumps </li></ul><ul><li>Water in/out control </li></ul>
  • 8. Main Tank <ul><li>Holds fish </li></ul><ul><li>Creates circular water pattern </li></ul><ul><li>Collects from the bottom </li></ul><ul><li>Removes Sediment/waste </li></ul>
  • 9. Biofilter <ul><li>Plastic substrate that bacteria can cling to. </li></ul><ul><li>Bacteria convert toxic ammonia (NH 3 ) in fish waste to nitrite (NO 2 ) and then nitrate (NO 3 ) which is least toxic. </li></ul>
  • 10. Biofilter <ul><li>Bacteria ( Nitrosomonas &amp; Nitrobacter ) cling to plastic discs </li></ul><ul><li>Aerobic Bacteria </li></ul><ul><li>Bacteria control the Ammonia </li></ul><ul><li>Takes 2-4 weeks for colonization </li></ul><ul><li>Ammonia -&gt;Nitrite -&gt;Nitrate </li></ul><ul><li>NH 3 &amp; NH 4 + -&gt;NO 2 -&gt;NO 3 </li></ul><ul><li>Most toxic -&gt; Least toxic </li></ul>
  • 11. Sediment Tank <ul><li>Has a cone shaped bottom </li></ul><ul><li>Non-soluble solids settle out </li></ul><ul><li>Soluble solids – give the water a brown color – need special filters </li></ul>
  • 12. Sand filter <ul><li>Removes solids </li></ul><ul><li>Sand clogs quickly </li></ul><ul><li>Must backwash daily </li></ul><ul><li>Residue build-up </li></ul><ul><ul><li>No longer functional </li></ul></ul>
  • 13. Aquaculture Tanks
  • 14. Aerators <ul><li>Keep the water circulating </li></ul><ul><li>Keep oxygen in the water so fish do not suffocate. </li></ul>
  • 15. Equipment <ul><li>Seines – nets with predetermined opening sizes to catch or hold only fish larger than a specific size </li></ul>
  • 16. Shrimp Harvest <ul><li>Video </li></ul>

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