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Chesapeake Bay Watershed #2
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17
Science
7th Grade
10/07/2013

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Cards

Term
What does Sav stand for?
Definition
Submerged Aquatic Vegies
Term
Why are savs so important
Definition

Food source for ducks, geese, and crabs

Habitat for crabs and small fish

Traps sediment, protects floor from erosion

 provides o2

Term
why is SAV disapearing
Definition

sediment smothers and blocks sunlight

nurtients such as fertilizers sewage treatment and lawn chemicals

algae bloom blocks sunlight

chemicals kill SAV's

Term
how many gallons of water do oysters filter in a sinlge day
Definition
60
Term
juvenile oysters are called?
Definition
spat
Term
what gender can a single oyster be
Definition
it ccan be both they can change gender  when they are about 3  months old
Term
how big does an oyster have to be before it can be caught
Definition
3 inches
Term
how do oysters eat
Definition
by sucking water into their shells then filtering out small plants called phytoplankton
Term
what factors effect the oysters demise
Definition
overharvesting, msx and dermo, and sedimentation
Term
what are plankton
Definition
plankton are organisms which passivly drift with the current
Term
another name for rockfish is
Definition
stripped bass
Term
fishing mortorium
Definition
ban on fishing
Term
What do rockfish eat
Definition
fish sofcrabs and eel
Term
Where do rockfish live most of there lives
Definition
saltwater of the oceans
Term
Where do juvenile fish start their lives
Definition
shallow marshes and grassy beds hiding from predators
Term
counter shading
Definition
having there bellies white so you cant seethem when you look up and having the uperalf of the body a dark color to match the depth of the sea
Term
how did rockfish recover from being endangered
Definition
a five year moritorium, and restoration of spawning grounds
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