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 PROTISTS Sargassum

12. PLANT-LIKE PROTISTS KELP

13. PLANT-LIKE PROTISTS ALGAE

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

15. FUNGI-LIKE PROTISTS
dodder
Water mold
Slime mold

16. FUNGI

17. PLANTAE

18. ANIMALIA