1 / 59

Principles of Aquaculture Life Cycle: Larval Nutrition & Feeding Strategies

Learn about the crucial larval stages in aquaculture, from broodstock to juveniles, and the nutritional needs of larvae. Discover the importance of live food such as phytoplankton and zooplankton, essential microalgae species, and feeding strategies to ensure successful development. Find solutions for potential issues like crash in algal cultures and the advantages of using brine shrimp (Artemia) as a primary food source. Dive deep into the world of aquaculture nutrition and optimize your larval feeding practices.

wferguson
Download Presentation

Principles of Aquaculture Life Cycle: Larval Nutrition & Feeding Strategies

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. LIVE FEED AKU3201 Principles of Aquaculture

  2. Life cycle • Broodstock –> larvae -> fry -> fingerling -> juvenile

  3. Larvae • Very small • Extremely fragile • Physiologically not fully developed • Small mouth • Still developing organ (i.e., eyes, chemoreceptors, digestive system)

  4. Yolk sac for 3 weeks

  5. Yolk sac for 3 days

  6. Natural/Live food • Phytoplankton/ Microalgae • Zooplankton • Invertebrate • Nematode

  7. Live Food

  8. Phytoplankton • Microalgae • 2-20 mikrometer

  9. Skeletonema

  10. Pheaodactylum

  11. Chaetoceros calcitrans

  12. Chlorella

  13. Dunaliella tertiolecta

  14. Tetraselmis

  15. General features of micro algae used in aquaculture

  16. General features of micro algae used in aquaculture

  17. Nutritional value • High unsaturated fatty acids (HUFA) • Eicosapentaenoic acid (EPA; 20:5n-3) • Arachidonic acid (ARA; 20:4n-6) • Docosahexaenoic acid (DHA; 22:6n-3)

  18. Microalgae Food for: • Bivalves • Penaeid shrimp • Fish • Rotifer, Artemia

  19. Problem: • Crash of algal culture Solution:

  20. Zooplankton • Rotifer • 50 – 200 mikrometer

  21. Rotifer • Brachionus plicatilis • Euryhaline: able to tolerate wide range of salinities • Suitable for crustaceans & fish

  22. L- type = 119-241 mikron S- type = 93 – 179 mikron SS- type = 90 – 159 mikron

  23. Advantages • Small size & slow swimming velocity • Suitable for fish that can’t ingest Artemia nauplii • Possible to rear at high density • Suitable for bioencapsulation/ enrichment

  24. Brine shrimp (Artemia) • 400m- 800 mikrometer

  25. NAUPLII ADULT

  26. Artemia • Nauplii of Artemia mostwidely used food item

  27. Able to tolerate > 70 ppt & up to 250 ppt. Why? • Able to produce dormant eggs (cyst) = Diapause

  28. Available in cysts • Advantages? • Place cyst in well-aerated seawater => hatch into nauplii after 24 hours • Nauplii positive phototaxis

  29. Artemia = filter feeder

  30. Problems with live food • Problems in obtaining steady supply of adequate quantities at appropriate times • Hard to ensure the quality & quantity of natural food • Nutritive value vary according to culture conditions • Contamination

More Related