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Aquaculture systems

Aquaculture systems rely on both biotic (living) and abiotic (non-living) components to achieve optimal fish production. Key factors include the fish component, which must meet behavioral and physiological requirements, and the water component, crucial for maintaining proper pH and dissolved nutrients. Management varies from extensive, low-input systems to intensive, high-input practices, influencing growth and species sustainability. Public aquaculture focuses on conservation and sport fishing, while private aquaculture emphasizes commercial viability. Key management considerations include feed, equipment, and economic factors.

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Aquaculture systems

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  1. Aquaculture systems • Biotic and abiotic components: • 1. The fish component • Behavioral/physiological requirements – must be in normal (optimal) range • Dissolved inorganic and organic compounds • pH

  2. Aquaculture systems • Biotic and abiotic components: • 2. The water component • – • 3. Pond or rearing area/container • Provide spatial requirements for species

  3. Aquaculture systems • Biotic and abiotic components: • 4. Nutritional requirements • Provides energy requirements to meet – standard metabolic demands • Components associated with water quality

  4. Aquaculture systems • Biotic and abiotic components: • 5. Management of the system • Fish culturist governs how well all components will be “balanced” • Management factors: • Record-keeping • Pond cleaning techniques and frequencies

  5. Aquaculture systems • Management conditions: • Extensive culture: Low degree of input on manager’s part • Low water exchanges • Common in developing regions • Subsistence production

  6. Aquaculture systems • Management conditions: • 2. Semi-intensive • Higher degree of management than extensive • Common in warmwater foodfish industry – catfish • Feed daily • Assess growth and mortality

  7. Aquaculture systems • Management conditions: • 3. Intensive • Common in salmonid culture • Feeding of commercial feeds at high rates • Continual sampling and monitoring

  8. Aquaculture • Public aquaculture: • Purpose: • Mitigation • Conservation/species recovery (ESA) • Management/sport fishing • Mitigation: • Columbia/Snake River systems

  9. Aquaculture • Conservation: • Endangered species preservation • Recovery of listed stock

  10. Aquaculture • Management/sportfishing: • Game fish stocking (non-salmonids) • Bass • Pike • Walleye • Put and take fisheries

  11. Aquaculture • Private aquaculture • Purpose: • Commercial: • Food/table fish and other aquatic species • Fee fishing • Trout/catfish • Common in Midwest/east

  12. Aquaculture • Bait fish – for sportfishing in many states • Forage fish • Tilapia/carp • Ornamental species • Aquarium/hobbyist trade • Direct or wholesale markets

  13. Aquaculture • Components of private and public aquaculture: • Production: • All life stages • Marketing (important in commercial) • Sales and distribution • Processing waste • Disposal • Value added product

  14. Aquaculture • Factors to consider in private aquaculture: • Feed availability/manufacturing • Equipment • Product development/marketing • Engineering/construction • Real estate

  15. Aquaculture • Economics: • Variable costs • Eggs/fingerlings • Feed • Mortality • Utilities • Maintenance • Fixed costs: • Labor • Insurance • Taxes • Advertising

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