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ObjectivesDefine aquaculture.Recall terms dealing with aquaculture.Describe animals surviving in the aquatic
environment.Explore photosynthesis.
What is Aquaculture?Management of the aquatic environment to
increase the harvest of useable plant and animal products
OCEANSRepresents the largest body of water
Salinity in this water is high
Salinity : is the measure of total mineral solids in the water, and is measured by either Electrical Conductivity or converted to Parts Per Thousands (PPT)
Gradient: deals with types of organisms that flourish in the ocean. Gradient measures the amount of salt and its effects over time.
Types of Water…Brackish: is a
mixture of fresh water and salt water.
Ex- Colorado river meeting the Gulf of Mexico in Matagorda bay
Bull shark can survive in this type of water. Any others??
Where Do You Think We Can Survive?
FrogsTurtlesReptilesAmphibians- A cold-blooded, smooth-
skinned vertebrate of the class Amphibia, such as a frog or salamander, that characteristically hatches as an aquatic larva with gills.
Land vs. WaterAmphibians
Frogsturtles reptiles
Are all animals that live part of their life in fresh water and the remaining on land.
Aquatic AnimalsShellfishCrustacceans Fish
These animals live their entire life either in fresh water, brackish water, and/or salt water
Are plants important?Plants harvest energy from the sun through
photosynthesis
What is photosynthesis? the process by which plants some bacteria and protistans
use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things
6H2O + 6CO2 ----------> C6H12O6+ 6O2
Also serve as waste recyclers
How does it work?How do fish breathe?
They use gills to breathe in oxygen from the water
Crustacceans have what kinds of skin?Exoskeleton , which they molt during certain
times of the year. Ex- hermit crab
Aquatic lifeLarvae: are mobile
aquatic organisms that grow into nonmobile adults
Ex- Coral
How do fish reproduce?Called spawning
which is to lay eggs
Salmon leave salt water and travel upstream to spawn
The harvesting of fish is called seining or to seine.
More to know…TAN= Total
Ammonial NitrogenToo much is often
toxic to aquatic species.
Toxins can have an adverse affect on the growth and development of plants and animals
pH =Measures acidity and alkalinity of water
pH scale 7 = neutralBelow 7 = acidic Above 7 = basic or
alkaline water
Watch a little about aquatic life
http://dsc.discovery.com/videos/life-nemertean-worms-and-sea-stars.html