Shared Flashcard Set

Details

Chesaepeake Bay watershed #2
Hudak
42
Science
7th Grade
10/07/2013

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Cards

Term
What does SAV stand for?
Definition
submerge aqatic vegatation
Term
Why are SAV important
Definition
food souce ducks, geese, crabs
shelter/habitat small fish, molting crabs
stabilize bay floor
provides o2
Term
why are SAV disappearing
Definition
toxic chemicals kill them
Term
What do blue crabs start as
Definition
Larvae
Term
what are females called
Definition
sooks
Term
What are males called
Definition
jimmies
Term
what does the female do
Definition
she molts
Term
When the eggs hatch, small larval crabs called
Definition
zoea
Term
Prevailing winds and currents sweep them back into the bay where the lucky ones eventually grow into another larval from called
Definition
the megalops
Term
when do they reach there sexual
Definition
After 12 to 16 months
Term
how long can crabs live
Definition
approximately
Term
what provides protection for the crabs
Definition
exoskeleton
Term
Junvenile attached oysters called
Definition
spat
Term
how old can they be to be bisexual
Definition
2-3 months old
Term
how big do they have to be to get cought and eaten
Definition
3 inches long
Term
Oysters eat by sucking water into their shells and filtering out small plants called
Definition
plytoplankton
Term
what is the percent of historic population remaining
Definition
one percent
Term
Plankton are defined
Definition
as organisms which passively drift with the current
Term
Microscopic plants called
Definition
phytoplankton are by far the most numerous plankton in the bay
Term
what are Zooplankton
Definition
animals whose movements are controlled by tidal current
Term
what provides food for the Zooplankton
Definition
phytoplankton provide food for the Zooplankton
Term
what is another name for strip bass
Definition
rockfish
Term
what is moratorium
Definition
is a ban
Term
what do rockfish eat
Definition
small fish and worms
Term
where do rockfish live for their most life
Definition
they live in salt water
Term
where do baby rockfish live
Definition
shallow marshes grass bed
Term
what is the system of counter shading
Definition
its when they are camoflage into the grass to hide
Term
why has the rockfish population come back
Definition
1.5 year moratorium
2.spawning grounds
Term
how do menhaden eat
Definition
filter feeders
Term
what do they eat
Definition
phytoplankton (algae)
Term
what are there predators
Definition
striped bass blue fish
Term
what do humans use them for
Definition
bait and oil
Term
what is omega protein
Definition
omega is an company
Term
only turtle in the world found in the brackish water
Definition
Term
feeds on mussels clams fish
Definition
Term
female is larger then the male
Definition
Term
warmer temperature more eggs hatchas females
Definition
Term
you can tell age by rings on the shell
Definition
Term
population decimated years ago because they were used in soup
Definition
Term
true or false 3 out of 4 crabs are eaten
Definition
true
Term
what is the percent of oysters
Definition
1 percent
Term
what are blue crabs when they are boring
Definition
spats
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