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Chesapeake Bay Watershed 2
lkelly
50
Science
7th Grade
10/07/2013

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Cards

Term
What does SAV stand for?
Definition
Submerged Aquatic Vegetation
Term
Wy are SAV's important?
Definition
1. food source(ducks, geese, and crabs)
2. provide habitat for crabs and small fish
3. protect bottom from erosion
4.provide oxygen
Term
What causes SAV's to disappear?
Definition
1.buried by sediment(construction and farms)
2.algae blocks sunlight( too much fertilizers)
3.toxic chemicals
Term
Plankton
Definition
organisms which passively drift with the current
Term
Phytoplankton
Definition
microscopic plant: by far the most numerous plankton in the bay
Term
Zooplankton
Definition
are animals whose movements are controlled by tital current
Term
Copepods
Definition
never grow to be bigger than the tip of a pencil
Term
food web
Definition
another name for a food chain
Term
Spat
Definition
young oyster
Term
how big until a oyster is legal to catch
Definition
3 inches
Term
true or false: crabs have a the ability to change gender
Definition
true
Term
how do oysters eat
Definition
by sucking water through their shells and filtering out
Term
how long did it take to filter the whole chesapeake bay
Definition
a few days
Term
how long does it take to filter the Chesapeake Bay today
Definition
3 to 4 years
Term
3 factors to oyster demise
Definition
Overharvesting, Disease, and sedimitation
Term
blue crabs start as...
Definition
larvae
Term
female crabs
Definition
sooks
Term
male crabs
Definition
jimmies
Term
what is a molt
Definition
when the crab sheds its shell
Term
zoea are...
Definition
larvae crabs
Term
Zoea are considered...
Definition
zooplankton
Term
larvel form crabs are considered...
Definition
megalops
Term
how long do crabs live
Definition
3 years
Term
atlantic blue crabs have how many legs
Definition
10 legs
Term
zoea are...
Definition
larvae crabs
Term
Zoea are considered...
Definition
zooplankton
Term
larvel form crabs are considered...
Definition
megalops
Term
how long do crabs live
Definition
3 years
Term
atlantic blue crabs have how many legs
Definition
10 legs
Term
shells are also called...
Definition
exoskeleton
Term
what fraction of legal sized crabs are caught
Definition
3/4 crabs
Term
What is another name for a Rockfish
Definition
striped bass
Term
fishing moratorium
Definition
law saying you can't catch fish
Term
What do mature rockfish eat
Definition
fish, soft crabs, and eel
Term
rockfish spent most of their lives in
Definition
saltwater
Term
where do juvinile rockfish live
Definition
shallow marshes and grass beds
Term
counter shading
Definition
try to blend in with their colors
Term
why has rockfish pop. recovered
Definition
5 year moratorium

restoration of spawning grounds
Term
what do menhaden eat?
Definition
plankton
Term
how do menhaden eat?
Definition
filter feed
Term
What are their predators?
Definition
rock fish, blue fish, trout, drum
Term
What do humans use them for?
Definition
bait, chum
Term
What is Omega Protein and what do they do?
Definition
reduction company
Term
what do terrapins eat
Definition
clams mussels fih worms
Term
where do terrapins live
Definition
brackish
Term
which is larger the male or the female terrapin
Definition
female
Term
how can you tell the terrapins age
Definition
rings on the shell
Term
warmer the tep. which gender is born
terrapin
Definition
female
Term
colder the tep. which gender is born
terrapin
Definition
male
Term
why was the terrapin pop. low
Definition
turtle soup
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