food agriculture n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Food & Agriculture PowerPoint Presentation
Download Presentation
Food & Agriculture

Loading in 2 Seconds...

play fullscreen
1 / 12

Food & Agriculture - PowerPoint PPT Presentation


  • 131 Views
  • Uploaded on

Food & Agriculture. Chapter 15, Section 3: Animals & Agriculture Standards: SEV4c. What are domesticated animals?. Animals bred and managed for human use. Over 50 species have been domesticated Examples: Sheep Cattle Chicken Honey bees Silkworms Shellfish Pigs.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Food & Agriculture' - isabel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
food agriculture

Food & Agriculture

Chapter 15, Section 3: Animals & Agriculture

Standards: SEV4c

what are domesticated animals
What are domesticated animals?
  • Animals bred and managed for human use.
  • Over 50 species have been domesticated
  • Examples:
    • Sheep
    • Cattle
    • Chicken
    • Honey bees
    • Silkworms
    • Shellfish
    • Pigs
what animal foods come from water
What animal foods come from water?
  • Fish & shellfish
  • Many countries can’t maintain cattle so fish are a good source of protein.
  • Most commercial fish species are suffering from overharvesting.
    • Catching or removing more organisms than the population can replace
what can be done to prevent overharvesting
What can be done to prevent overharvesting?
  • Create no-fishing zones (marine preserves) so populations can recover.
  • U.S. Fish and Wildlife Services puts limits on
    • # of fish caught
    • Size of fish caught
    • Gender of fish (sometimes)
  • Increase aquaculture
what is aquaculture
What is aquaculture?
  • Raising fish or shellfish for human use or consumption.
  • China is leader in aquaculture of freshwater fish.
  • 23% of all seafood comes from aquaculture worldwide
what are some aquaculture methods
What are some aquaculture methods?
  • Oyster farm:
    • Oysters are submerged in cages to keep predators out.
  • Fish farm:
    • Several large pools house fish at different stages of growth. Fish are harvested & sold at appropriate age.
  • Ranch:
    • Fish are raised until they are a certain size and then released into the wild where they will be later harvested by fishermen (ex: salmon)
what are the problems with aquaculture
What are the problems with aquaculture?
  • Masses of fish create large amounts of waste which must be disposed of & can cause pollution.
  • Uses & wastes lots of water
  • Damages wetlands when aquaculture operations are built there.
what animal foods come from land
What animal foods come from land?
  • Livestock- domesticated animals that are raised on a farm or ranch and sold for profit
  • Used for:
    • Meat
    • Leather
    • Eggs
    • Wool
    • Manure- fertilizer or fuel source (developing countries)
    • Draft animals- Pull plows/carts (developing countries)
what are the major types of livestock
What are the major types of livestock?
  • Ruminants
    • Cattle, sheep, goats
    • Cud-chewing animals
      • Regurgitate food and rechew it a few times to mechanically digest the vegetation.
    • Have 3-4 chambered stomachs with specialized bacteria that help them break down the cellulose in the plant matter that they eat.
what are the major types of livestock1
What are the major types of livestock?

Cattle

  • Most common ruminant livestock.
  • Most cows in US raised in CAFO- concentrated animal feeding operation (aka feedlot)
    • Because animals are cramped and wade in their own feces they are given antibiotics to prevent infections.
    • Scientists worry this overuse of antibiotics may be creating resistance in bacteria.
  • Not always used for meat
    • Hindus consider cows sacred and use them for milk, manure, and as draft animals
    • Masai tribe in Africa only drink milk or blood of cow.
what are the major types of livestock2
What are the major types of livestock?
  • Poultry
    • Domesticated birds raised for meat or eggs
    • Chickens, turkey, ducks, geese
    • Population of chickens has increased by 320% since 1961!
    • Poultry also raised in CAFO type environment.
      • Birds are fed artificial hormones to make them “beef up” faster so they can be harvested quicker.
      • Chicken breasts so large their legs cannot support the unnatural weight.
you should be able to
You should be able to…
  • Explain why the percentage of seafood produced by aquaculture is increasing so rapidly.
  • Explain how overharvesting affects the supply of fish such as salmon.
  • Describe the importance of livestock to cultures that consume no meat.