Aquaculture slideshow


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Aquatic habitats , Aquatic Ecosytems and Aquaculture Systems.-Introduction

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Aquaculture slideshow

  1. 1. Aquaculture
  2. 2. What we will coverTheory Fresh Water Aquatic Habitats Aquatic Food Web Aquaculture Design Focus on PondsPractice Tyre Pond building after lunch
  3. 3. Rivers- Rain FedHead Waters-Upper Reaches Middle Reaches-Un spoilt Lowland Rivers Spring-Fed Rivers Lake Fed Rivers Short Mountain Rivers Estuaries
  4. 4. Brackish Still Water Dune Slack Saltpans Brackish Lagoons and Pools
  5. 5. Upland Still Waters Acid, Peat-Bog Pools Tarns Glacial, Linear Valley Lakes
  6. 6. Lowland Still Waters Fens Meres Ponds
  7. 7. What determines The Plant and AnimalBiota ?- •Nutrient Content •Depth and light penetration •Acidity
  8. 8. What determines The Plant and AnimalBiota ?-Nutrient Content The level of nutrients in the water underpins the existence of all life, plant and animalThe nutrient content is affected by The geology of the catchment. The topography of the catchment. Intensiveness of agriculture in the surrounding area Size of surrounding human population (sewage)
  9. 9. Nutrients Nutrients and Light = Phytoplankton Algae-Diatoms-CyanoBacteria
  10. 10. Oligotrophic Waters Glacial, Linear Valley Lakes Tarns
  11. 11. Eutrophic Waters Meres Fens Ponds
  12. 12. What determines The Plant and AnimalBiota ?-Depth and light penetration A high density of phytoplankton quickly absorbs the light and reduces the depth at which the light can penetrate to approx 2m ,below this point nothing can grow and animals cannot live.
  13. 13. What determines The Plant and AnimalBiota ?- Acidity Some species only live in PH 4-6 and some species only exist in slightly alkaline waters pH >7.
  14. 14. An Optimum Aquatic Habitat A good supply of Nutrients supporting a high diversity of Plant and Animal life A balanced level of phytoplankton (PRIMARY PRODUCERS) so that light can penetrate through the water A water body deep enough for plants to grow on the floor utilizing the filtered light We can easily design this optimum Habitat.
  15. 15. Chinampas
  16. 16. Aquaponics
  17. 17. Ponds
  18. 18. Niche habitats for Aquatic plants
  19. 19. EmergentsPhragmites australis – Common ReedUses Edible shoots, roots Insulation Fast growing biomass Basketry Tolerant of Wind
  20. 20. Deep MarginalNymphaea alba-White Water LillyUses Edible roots and seeds Medicinal Shade
  21. 21. OxygenatorsMyriophyllum sp.-Water-mifoilUSES Forage for Fish Providing oxygen Edible roots
  22. 22. FloatersLemna minor- Duckweed USES Forage for Fish Shade the water Edible –great for Chickens The dried plant repels mosquitoes Medicinal properties
  23. 23. Common Carp - Cyprinus carpioUses High Protein food Tolerance of a lack of oxygen Rapid growth Easy to feedInfo•Common carps feed on small plants andzooplankton, molluscs, detritus and deadplants.•The deep water is needed for winterhibernation•Logs and rocks with cavities for young fishto shelter
  24. 24. Toads and FrogsUses Frogs and Toads will keep pest populations low A single adult toad can eat as many as 10,000 insects per summer. Including Mosquitoes Edible Frog Frogs legs , taste a bit like chicken apparently :- Rana esculenta Rana esculenta Water quality control :they need clean water ,if you have them around you can be assured your water is clean. If they start growing extra legs be concerned..Position•The ideal pond for frogs and toads includes plenty of shallows for toadsto rest and breed.•A deep area of at least 1.3 meters for overwintering frogs, and plenty ofvegetation around the edges to hide out in.•Provide shallow, not steep, edges so frogs and toads can easily climb inand out, or add a couple logs partly in and partly out of the water.• Both frogs and toads will also really appreciate some rocks around theedges for sunning themselves
  25. 25. Edge
  26. 26. Paulownia Garden Pond Design