Presentation on theme: "WATER ENVIRONMENTS Chapter 7"— Presentation transcript:
1 WATER ENVIRONMENTS Chapter 7 Describe various structures and equipment used in growing aquacrops Examples: ponds, cages, raceways, tanks, cagesDescribe infrastructure necessary for aquaculture production Examples: labor, feed, manufacturing, transportation
2 LEARNING OBJECTIVES Explain structures for growing aquacrops Distinguish between pond typesExplain pond constructionCompare tank and raceway cultureEvaluate cage cultureIdentify habitats for growing aquacropsCompare recirculating and closed systemsAnalyze infrastructureDiscuss aquaculture equipment
3 WATER SUPPLY 70% of the earth is covered in water 97% of that is salty 3% is freshwater2% of freshwater is frozenThat leaves 1% for homes, industries, farms, livestock, aquaculture, etc.We get our water from underground aquifer
5 WATER AND SPECIESWater needs to be matched to the species being grown as each species has specific water requirements.There is a huge existing supply of saltwater but it has limited access.Australian redclaw crawfish need freshwater with moderate to high calcium levels.We have to add calcium to well water to make it suitable for the crawfish.
6 WATER FACILITIESPondsRacewaysTanksVatsAquariumsCages and pens
45 SELECTING A WATER FACILITY Supply of available water – need to know the amount of water needed and availableDisposal of used water – may contain feces, uneaten food and cannot be run directly into natural body of waterCharacteristics of water / species grown – the available water must be matched to the aquacrop or must have economical way to make it suitable
46 SOURCES OF WATER Wells Streams Lakes and Oceans Springs Industrial effluentMunicipal water systemsRecycled wastewaterSurface runoff