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TAXONOMY, HABITAT, AND GENETICS

TAXONOMY, HABITAT, AND GENETICS. Describe the taxonomy of aquatic species Classify important aquaculture species Describe general habitat considerations as related to species Discuss genetic potentials in aquaculture Explain the use of genetically improved species.

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TAXONOMY, HABITAT, AND GENETICS

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  1. TAXONOMY, HABITAT, AND GENETICS • Describe the taxonomy of aquatic species • Classify important aquaculture species • Describe general habitat considerations as related to species • Discuss genetic potentials in aquaculture • Explain the use of genetically improved species

  2. Chapter 3 – Taxonomy, Habitat, and Genetics *Taxonomy – science of classifying, naming, and identifying organisms. *Modern System of Taxonomy – binomial nomenclature formulated by Carol Linne. *Based on Latin (Carolus Linnaeus).

  3. Carolus Linnaeus

  4. Based on the concept of Species *Species - a group of “like” organisms that are reproductively isolated. *Hybrid – a genetic cross between two similar species. *Genus – a group of closely related species. *Scientific Name – genus and species Example: Australian redclaw crawfish Cherax quadricarinatus or Cherax quadricarinatus

  5. Higher Taxonomic Ranks • Family – group of closely related (g-o-c-r) genera • Order – g-o-c-r families • Class – g-o-c-r orders • Phylum – g-o-c-r classes • Kingdom – g-o-c-r phyla • “King Phillip Came Over From Germany Saturday”

  6. Complete classification of the Australian redclaw crawfish • Kingdom – Animalia • Phylum – Arthropoda • Class – Crustacea • Order – Decapoda • Family – Parastacidae • Genus – Cherax • Species - quadricarinatus

  7. The Six Kingdoms • Archaebacteria – ancient bacteria • Eubacteria – true bacteria • Protista – algae and protozoans • Fungi – mushrooms, yeasts, molds • Plantae – true plants • Animalia - animals

  8. Kingdom Archaebacteria • Thermoacidophiles – thrive in hot, acidic water (hot springs, geothermal vents) • Extreme halophiles – thrive in very salty water (Dead Sea) • Methanogens – produce methane gas; live deep in the mud

  9. Kingdom Eubacteria • Cyanobacteria – first photosynthetic organisms; converted Earth’s atmosphere to one that contains oxygen. • Nitrifying bacteria – convert toxic ammonia into harmless nitrate.

  10. Kingdom Protista • Plant-like protists (ex. – algae, seaweeds, kelp, Sargassum) • Animal-like protists (protozoans) • Fungi-like protists (ex. – water molds, slime molds, Dodder) • Scientists theorize that these three groups gave rise to plants, animals, and fungi

  11. PLANT-LIKE PROTISTSSargassum

  12. PLANT-LIKE PROTISTSKELP

  13. PLANT-LIKE PROTISTSALGAE

  14. ANIMAL-LIKE PROTISTS(PROTOZOANS) Stentor Amoeba Paramecium

  15. FUNGI-LIKE PROTISTS dodder Water mold Slime mold

  16. FUNGI

  17. PLANTAE

  18. ANIMALIA

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