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bwilson13
Cheseapeke Watershed 2
45
Science
7th Grade
10/07/2013

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Cards

Term
What does SAV stand for?
Definition
Submerged Aquatic Vegetation
Term
Why are SAV's important? (4 reasons)
Definition
1)food source (geese, ducks, crabs)
2)provides habitat
3)protects bottom from erosion
4)provides O2
Term
Why are SAV's disapearing?
Definition
1)buried by sediment (construction, farming)
2)algae blocks sunlight (too much ferdilizer)
3)toxic chemicals
Term
larvae
Definition
the young of any invertebrate animal
Term
sooks
Definition
a female crab
Term
jimmies
Definition
a male crab
Term
molts
Definition
to cast or shed the feathers, skin, or the like, that will be replaced by a new growth.
Term
zoea
Definition
any of the free-swimming larva of certain crustaceans, as the crab, having rudimentary legs and a spiny carapace.
Term
What are zoea considered as?
Definition
zooplankton
Term
megalops
Definition
the larval stage of marine crabs immediately prior to and resembling the adult stage.
Term
How many years do crabs live for?
Definition
crabs live for about three years.
Term
How many legs do crabs have?
Definition
crabs have ten legs.
Term
exoskeleton
Definition
an external covering or integument, especially when hard, as the shells of crustaceans
Term
how many crabs are caught and eaten out of 4 leagle crabs each year?
Definition
3 out of 4 crab are caught and eaten each year.
Term
spat
Definition
juvenile attached oysters
Term
What is the legal size of oysters to eat?
Definition
three inchs is the legal size of oysters to eat .
Term
What is the one unique characteristic that oysters have?
Definition
they can change from female to male or male to female.
Term
How do oysters eat their food?
Definition
they suck water into their shell and filter out small plants called phytoplankton.
Term
A long time ago how long did it take for oysters to filter the bay?
Definition
it only took a few day for oysters to filter the bay.
Term
how long does it take for oysters to filter the bay today?
Definition
it takes three to four years for oysters to filter the bay.
Term
what are the two diseases that are killing oysters?
Definition
the two diseases that are killing oysters are dermo and MSX.
Term
Overharvesting
Definition
taking to many of one thing
Term
sedimentation
Definition
it is depositing or covering oysters prime habitat.
Term
Plankton
Definition
organisms which passively drift with the current.
Term
phytopplankton
Definition
they are microscoic plants and are the most numerous plankton in the bay.
Term
zooplankton
Definition
animals whose movement are controlled by tidal current.
Term
copepods
Definition
any of a large group of usually tiny freshwater and saltwater crustaceans
Term
food web
Definition
the totality of interacting food chains in an ecological community
Term
fishing moratorium
Definition
to suspend fishing for rockfish
Term
rockfish
Definition
striped bass.
Term
what is the rockfish's diet?
Definition
fish, soft crabs, and eel.
Term
Where do most juvenile fish live and why?
Definition
they live in shallow marshes and grass beds they live in them to hide from larger perdators and to feed on abundant foods supply.
Term
counter shading
Definition
the development of dark colors on parts usually exposed to the sun and of light colors on parts usually shaded, especially as serving for protection or concealment.
Term
why has rockfish pop. recovered?
Definition
the 5 year moratorium and repatation of spawning grounds.
Term
how do menhaden eat?
Definition
filter feeders
Term
what do they eat?
Definition
phytoplankton
Term
what are their predators?
Definition
rockfish
drum
blue fish
Term
what do humans use them for?
Definition
crab bait
fish bait
chum
Term
what is Omega Protein and what do they do?
Definition
company (Virginia) that catch and process menhaden.
they catch 80% of them.
Term
What do diamondback terrepin eat?
Definition
Feed on clams, mussles, and fish.
Term
Where do diamondback terrepin live?
Definition
Only turtle that live in brackish water.
Term
True or False

Females are bigger than the male
Definition
True
Term
How do you tell how old a turtle is?
Definition
Count the rings on the shell of the turtle.
Term
True or False

The colder the temp. the more felmales hatch.
Definition
False
Term
Why is the pop. of diamondback terrepin low?
Definition
Pop. is low because of turtle soup.
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