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ch bay watershed 2
abrecht
46
Science
7th Grade
10/07/2013

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Cards

Term
what does sav stand for
Definition
submerged aquatic vegitation
Term
why are sav important
Definition
-food source
-shelter/habitat
-stabilize bay floor/filter and trap sediment
Term
why are sav disappearing
Definition
-toxic chemicals kill them
-sediment[erosion]
-turbidity=no light for plants
-too much alga[from fertilizer]
Term
larvae
Definition
first stage of a blue crab
Term
sooks
Definition
female crabs
Term
jimmies
Definition
male crabs
Term
how do crabs grow
Definition
molt or shed shell
Term
how long do crabs live for
Definition
3-4 years
Term
zoea
Definition
hatched eggs
Term
megalops
Definition
the second larval stage
Term
how many legs do crabs have
Definition
10
Term
what do zoea and megalops have in common
Definition
booth zooplankton which is a floating animal
Term
exoskeleton
Definition
hard and covered with pointy ends
Term
how may crabs that are caught are eaten
Definition
3 out of 4
Term
what are juvenille oysters called
Definition
spat
Term
how big do oysters have to be to be legally caught
Definition
3 inches
Term
what are oysters that other species aren't
Definition
bisexual
Term
how do oysters help clean the bay
Definition
they filter the bay
Term
what is the percent of the historic population
Definition
1
Term
how long did it take the oysters to filter the bay in historic times
Definition
only a few days because the population was so abundant
Term
what are the 3 factors that are killing the oysters
Definition
overharvesting, sedimentation, and diseases
Term
what are the 2 diseases
Definition
msx and dermo
Term
plankton
Definition
organisms that drift with the current
Term
phytoplankton
Definition
microscopic plants that move with the current
Term
zooplankton
Definition
floating animals whose movements are controlled by the current
Term
copepods
Definition
zooplankton that never grow to be bigger than a pencil tip
Term
food web
Definition
interconnected system
Term
what is the other name for rockfish
Definition
stripped bass
Term
fishing moratorium
Definition
a band on fishing and hunting
Term
what do large rockfish eat
Definition
large quantities of fish, soft crabs and eel
Term
where do rockfish live for most of their life
Definition
saltwater
Term
what do juvenile rockfish do for protection
Definition
they hid in shallow marshes and grass beds to hide from larger predators, it also provides a great supply of food
Term
what is a more specific name for camouflage
Definition
counter shading
Term
why has rockfish population come back
Definition
because of a band on fishing and spawning grounds which are protective
Term
how do menhaden eat
Definition
they filter feed
Term
what do they eat
Definition
phytoplankton
Term
what are their predators
Definition
stripped bass, bluefish
Term
what is omega product and what do they eat
Definition
company that catches menhaden, process them and sell them
Term
what do humans use them for
Definition
oil, bait, dog food, protein
Term
only turtle in world that lives in brackish water
Definition
diamondback terrapin
Term
what does it eat
Definition
mussels, clams, fish
Term
which crab turtle is bigger female or male
Definition
female
Term
what temperature makes the most babies
Definition
warmer temperature
Term
how do you tell how old a turtle is
Definition
by the rings on the shell
Term
why has the turltle population decimated
Definition
because people were catching turtles to makke turtle soup
Term
only turtle in world that lives in brackish water
Definition
diamondback terrapin
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