What are the principles of aquaculture? How is stock selected? How are the fish bred? How are nutrition, disease and competition controlled? How is the environment manipulated?

Aquaculture… a definition Aquaculture (also known as fish or shellfish farming) refers to the breeding, rearing, and harvesting of plants and animals in all types of water environments including ponds, rivers, lakes, and the ocean. This is done through control of the environment by selecting suitable species and controlling limiting factors.

TASK Use the following resources to complete the grid Textbook pages 265-267 Teachers notes Powerpoint on aquaculture (on website) https://www.youtube.com/watch?v=6C8tCXIf6BY

The principles of aquaculture Stock selection for desirable characteristics eg colour, growth rate, tolerance of high population density Breeding collection of eggs and milt (sperms), fertilization, raising of young fish Control of disease immunisation use of antibiotics reduced stocking density Control of competition exclusion/killing of predators/competitors Nutrition for herbivores - provision/growth of plant foods for carnivores - provision of food from waste/low value fish catch Manipulation of the environment (temperature , O2, light levels) temperature control - growth rate, dissolved oxygen levels dissolved oxygen - survival of sensitive species eg trout, salmon light levels - control of breeding