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Coleman
Chesapeake Bay 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 SAVs inportant?
Definition
1.food source(geese, ducks, crabs)
2.habitat(small fish, molting crabs)
3.prevent erosion on the bottom of the Bay
4.provides oygen
Term
Why are SAVs disappearing?
Definition
1.sediment clouds water and prevnts the plants from getting light
2.too much algea(fertilizer) causes cloudy water
3.toxic chemicals(acid rain, Roundup) kill the plants
Term
How do crabs begin their lives?
Definition
as larvae
Term
sook
Definition
female crab
Term
jimmies
Definition
male crab
Term
What is it called when a crab sheds its shell?
Definition
molting
Term
Stage 1 of a blue crab
Definition
zoea
Term
Stage 2 of a crab
Definition
megalops
Term
life span of a crab
Definition
3 years
Term
How many legs does a crab have?
Definition
10 legs
Term
crabs shell
Definition
exoskeleton
Term
Estimated crabs that are caught and eaten each year
Definition
3 of every 4
Term
zoea and megalops are examples of....
Definition
zooplankton
Term
spat
Definition
juvenile attached oysters
Term
What is the legal length that you can harvest oysters?
Definition
3 inches
Term
One unique characteristic of an oyster is...
Definition
They can change gender.
Term
How do oysters eat?
Definition
They suck the water and filter out the phytoplankton.
Term
Once the oysters were so abundant that they could fiter all the water in the Bay in a few days.
Definition
True
Term
Reasons for decreased oyster population
Definition
overharvesting
diseases(MSX and Dermo)
sedimentaion(land development)
Term
One percent of the oyster population remains today.
Definition
True
Term
It would take three to four years for the oysters to filter the water in the Bay.
Definition
True
Term
plankton
Definition
small organisms that drift with the current
Term
phytonplankton
Definition
plant plankton(algae)
Term
zooplankton
Definition
animal plankton
Term
copepods
Definition
common type of zooplankton
Term
food web
Definition
how animals relate in diet
Term
What is another name for a rockfish?
Definition
striped bass
Term
moratorium
Definition
ban on something(fishing)
Term
What does a mature rockfish eat?
Definition
fish, soft crabs and eel
Term
Where do rock fish spend most of their life?
Definition
In the saltwater of the ocean.
Term
Where do juvenile crabs live?
Definition
In shallow marshes and grass beds.
Term
Counter-shading
Definition
a system of 2 or more camouflages that help the animal blend into the environment from different directions.
Term
What has lead to the recovery of the rockfish?
Definition
1.moratorium
2.restoration of traditional spawning grounds
Term
How do menhaden eat?
Definition
They are filter feeders.
Term
What do menhaden eat?
Definition
They eat phytoplankton.
Term
What are menhadens' predators?
Definition
Striped bass, osprey and blue fish.
Term
What do humans use menhadens for?
Definition
Fish oil, fertilizer, animal feed, paint, lipstick, and crab bait.
Term
What is Omega Protein and what do they do?
Definition
The a re a factory in Reedville that catches and processes the menhaden.
Term
What do the diamondback terrapins eat?
Definition
Clams, mussels, fish and mollusks.
Term
Are the female terrapins larger that the males?
Definition
Yes
Term
How do you tell the age of a terrapin?
Definition
You can count the rings on the shell.
Term
What determines the gender of a terrapin?
Definition
The temperature at which it is laid as an egg.
Term
What makes the terrapin unique from other turtles?
Definition
Only turtles to live only in brackish water.
Term
What decimated the terrapin population?
Definition
Terrapin soup
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