ANSC 10200 Lecture Notes - Lecture 12: Overfishing, Environmental Degradation

• School: Purdue University
• Department: Animal Sciences
• Course: ANSC 10200
• Professor: Dr. Karcher

Document Summary

Defining aquaculture: cultivation and harvest of aquatic organisms, fish, mollusks, crustaceans, aquatic plants, not wild-catch. Importance of aquaculture: efficient use of land, low space requirements for fish, can use land unsuitable for crops, efficient use of feed, excellent feed conversion ratios, able to use waste and by-product feeds. Us aquaculture production: 594 million pounds total production in 2012- valued at . 23 billion, not a major aquaculture producer globally (ranked 15th, over 90% of seafood consumed is imported, half of this comes from aquaculture. Aquaculture in indiana: ~50 fish producers and million in sales in 2013, up from 18 producers and . 5 million in 2006. Disadvantages: hugh construction costs, oxygen often scarce at greater depths. Advantages: ease of handling/harvesting fish, constant water flow controls waste buildup. Disadvantages: difficult to find sites with water at correct temperature. Advantages: can use existing lakes and ponds. Disadvantages: decreases production efficiency, disease spreads quickly. Recirculating systems: water is biofiltered and reused.