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Chesapeake Bay Watershed #2
Arbaugh
49
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
Definition
1. food source
2. habitat
3. stabilizes bay bottom
4. provide O2
Term
Why are SAV's disappearing
Definition
1. sediment
2. too much algae
3. toxic chemicals
Term
Blue crabs begin as
Definition
larvae
Term
females are called
Definition
sooks
Term
males are called
Definition
jimmies
Term
when a mating pair is made what does the female do
Definition
molt
Term
what is the first step of crabs called
Definition
zoea
Term
the second step in life is called
Definition
megalops
Term
zoea and megalops are
Definition
zooplankton
Term
the crbs live for
Definition
3 years
Term
blue crab have how many sets of legs
Definition
10
Term
what is the crabs shell called
Definition
exoskeloton
Term
?/4 legal sized crabs are caught each year
Definition
3/4
Term
Juvenile attached oysters are called what
Definition
spat
Term
legal size to keep oysters
Definition
3 inches
Term
can oysters change gender
Definition
yes
Term
how do they eat
Definition
they suck in phytoplankton
Term
when they were abundant how long did it take to filter the bay
Definition
3-4 days
Term
what percent remains of what used to be
Definition
1%
Term
why did oyster populations decline
Definition
1. Overhavesting
2. MSX and Dermo
3. Sediment covering oysters because of devloping
Term
do we need to stop overharvesting
Definition
yes
Term
MSX and DERMO are killing oysters T/F
Definition
true
Term
how long does it take for the oysters to filter the bay now
Definition
3-4 years
Term
oysters can attach to sand and other non-hard objects T/F
Definition
false
Term
oysters filter water with gills T/F
Definition
false
Term
plankton
Definition
small animals that move with the current
Term
phytoplankton
Definition
plant like algea
Term
zooplanton
Definition
animal plankton
Term
copepods
Definition
type of zooplankton
Term
plankton are what
Definition
part of the food chain
Term
Rockfish are also called what
Definition
Striped Bass
Term
Ban on fish is called what
Definition
moratorium
Term
what do rockfish eat
Definition
fish, soft crabs, eels
Term
where do rockfish spend most of their time
Definition
saltwater ocean
Term
where do they spend their time as young rockfish
Definition
marshes and grass beds
Term
camouflage that is diferent on the top and bottom
Definition
counter shading
Term
how did the rochfish recover
Definition
a 5 year moratorium and restored spawning grounds
Term
Menhaden what do they eat
Definition
phytoplanton
Term
Menhaden how do they eat
Definition
filter feed
Term
Menhaden predators
Definition
rockfish bluefish humans
Term
Menhaden what do humans use them for
Definition
bait/Oil
Term
Menhaden what is Omega Protein and what do they do
Definition
they catch and process menhaden and sell them
Term
Diamondback Terrapin feeds on
Definition
clams fish
Term
Diamondback Terrapin are females bigger than males
Definition
yes
Term
Diamondback Terrapin can you tell age by the rings on there back
Definition
yes
Term
Diamondback Terrapin can temp. affect gender of the eggs
Definition
yes
Term
Diamondback Terrapin is it the only turtle that only lives in brackish water
Definition
yes
Term
Diamondback Terrapin why was the pop. decimated 18th and 19th centry
Definition
for soup
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