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The husbandry of marine or saltwater organisms

Mariculture. The husbandry of marine or saltwater organisms. Major Species of Fish (KY). 1 st Catfish Prawn (Freshwater) Trout Large Mouth Bass Hybrid Striped Bass Paddlefish Musky Baitfish. Minor Species (KY). Walleye Common Carp Yellow Perch Tilapia Crappie Crayfish

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The husbandry of marine or saltwater organisms

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  1. Mariculture The husbandry of marine or saltwater organisms

  2. Major Species of Fish (KY) • 1st Catfish • Prawn (Freshwater) • Trout • Large Mouth Bass • Hybrid Striped Bass • Paddlefish • Musky • Baitfish

  3. Minor Species (KY) • Walleye • Common Carp • Yellow Perch • Tilapia • Crappie • Crayfish • Hybrid Bluegill

  4. External Anatomy • Lateral Line – sensory organ that senses water currents, pressure, and movement in the water • Operculum – a bony flap-like protective gill cover • Scales – a plate-like protective covering of the skin • Caudal Fin – the tail fin of fish, provides thrust/movement • Pectoral Fin – the chest fins, provides maneuvering • Pelvic Fin – the hip fins, provides maneuvering • Dorsal Fin – the back fin, provides maneuvering • Nostrils/ Nares – opening of the nasal cavity, detects odors in water (feed/danger) • Vent – an external opening to the digestive and reproductive tract

  5. Internal Anatomy 1. Swim Bladder – (air bladder) an internal, inflatable gas bladder that enables a fish to regulate its buoyancy 2. Gills – an internal organ used in respiration and excretion 3. Liver – internal organ that breaks down fat, stores fat and carbohydrates, excretes waste, and maintains proper blood chemistry 4. Gonads – the reproductive organs, testes or ovaries

  6. Catfish Production • Catfish is the largest enterprise of all aquacultural products. • Today there are over 150,000 acres of catfish ponds in the United States. • They are raised in the southern part of the U.S. because they are warm-water fish. • Warm-water fish grow best in water temperatures around 85 degrees. • Mississippi leads the nation in catfish production.

  7. Broodfish • The production of catfish begins with the breeding process. (Selective Breeding) • Brood fish range from 3 to 5 lbs. • Brood ponds are used to keep fish that are used to breed and lay eggs.

  8. Roe/Eggs • The female catfish lays approximately 10,000 eggs. called “roe” at a time. • Next, the male fertilizes the eggs by depositing sperm into the mass of eggs. • Egg hatching occurs in 7 to 8 days.

  9. Fry • After eggs hatch, the small fish are called “fry”. • Up to 1 inch length • From birth to 4 to 8 months

  10. Fingerlings • Fry develop into fingerlings • 4 to 8 months • Fingerlings are 1 to 8 inches

  11. Stockers • Fingerlings develop into “stockers” • Stockers are ¾ of a pound.

  12. Foodfish • Stockers develop into foodfish • 1 to 2 pounds • Selected fish are then taken to market

  13. Broodfish • Choice foodfish males and females are kept for breeding purposes. • These are known as broodfish • Cycle begins again.

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