chesapeake bay: an introduction to an ecosystem section 4: communities ii-1e4: swimmers
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Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E4: Swimmers. View this quiz as a slide show from “the beginning” - PowerPoint PPT PresentationTRANSCRIPT
Chesapeake Bay:An Introduction to an Ecosystem
Section 4: CommunitiesII-1E4: Swimmers
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Identify the fish
Phytoplankton
Hint – word bank Answer Next Slide
II-1E4-1
A
DC
B
EBluefishStriped KillifishBay AnchovyWeakfishStriped Bass
D. BluefishC. Striped KillifishA. Bay AnchovyB. WeakfishE. Striped Bass
Swimmers comprise the _____________ community whose organisms can control and direct their movements. This group includes fish, some crustaceans and other invertebrates.
Starts with n
nekton
Hint Answer Next Slide
II-1E4-2
Approximately ______ species of fish can be found in the Chesapeake Bay.
350475538780
350
Hint – multiple choice Answer Next Slide
II-1E4-3
True or False: The resident fish in the Bay tend to be smaller in size and do not travel the long distances that migratory species do.
No hint
True
Hint Answer Next Slide
II-1E4-4
Smaller resident species, such as killifish, normally occur in shallow water where they feed on a variety of ____________.
No hint
invertebrates
Hint Answer Next Slide
II-1E4-5
What is the most abundant fish in the Bay?
Initials b.a.
bay anchovy
Hint Answer Next Slide
II-1E4-6
Bay anchovies feed primarily upon _____________. Adult anchovies also
may consume _____________, ____________ and some
_______________.
Initials z, l.f., c.l., & b.s.
Hint Answer Next Slide
II-1E4-7
larval fishzooplankton
crab larvaebenthic species
In turn, the bay anchovy is a major food source for predatory fish like _____________, _____________ and ________________, as well as some birds and mammals.
No hint
Hint Answer Next Slide
II-1E4-8
weakfishstriped bass bluefish
Migratory fish fall into two categories: ______________, which spawn in the
Bay or its tributaries, and ___________ fish, which spawn in the ocean.
Makes me think of mice & what eats them
Hint Answer Next Slide
II-1E4-9
catadromousanadromous
Anadromous fish migrate varying distances to spawn in freshwater and can
even be considered Bay residents. For instance, during the spawning season, ______________________ travel short
distances from the brackish water of the middle Bay to freshwater areas of the
upper Bay or tributaries. 2 colors of a fish that reminds me of a bird group
yellow and white perch
Hint Answer Next Slide
II-1E4-10
_______________ also spawn in the tidal freshwater areas of the Bay and major
tributaries. Some remain in the Chesapeake to feed while others migrate
to ocean waters.
S. B.
Striped bass
Hint Answer Next Slide
II-1E4-11
____________ and ____________ are truly anadromous, traveling from the
ocean to freshwater to spawn and returning to the ocean to feed.
S & h
Hint Answer Next Slide
II-1E4-12
herringShad
______________ are the only catadromous species in the Bay.
E.
Eels
Hint Answer Next Slide
II-1E4-13
Although they live in the Bay for long periods, eels eventually migrate to the
__________________ in the central North Atlantic to spawn
S. S.
Sargasso Sea
Hint Answer Next Slide
II-1E4-14
Name five that fish utilize the Bay strictly for feeding, journeying into the Bay while still in their larval stage to take advantage of the rich supply of food.
C, D, M, W & S
1. Croaker2. Drum3. Menhaden4. Weakfish5. Spot
Hint Answer Next Slide
II-1E4-15
The abundance of ________________ supports a commercial fishing industry and provides food for predatory fish and birds.
Not women
menhaden
Hint Answer Next Slide
II-1E4-16
___________ enter the Bay only as young adults or mature fish.
A color fish
Bluefish
Hint Answer Next Slide
II-1E4-17
Besides fish, _________________ and _______________ may be part of the nekton community.
No hint
Hint Answer Next Slide
II-1E4-18
invertebratescrustaceans
Name five larger animals that enter the Bay though two of the five only occasionally.
No hint
1. Sharks2. Rays3. sea turtles4. marine dolphins5. whales
Hint Answer Next Slide
II-1E4-19
Why is the blue crab is difficult to place in any one community?
No hint
because it requires a variety of aquatic habitats, from the mouth of the Bay to fresher rivers and creeks, in order to complete its life cycle. Throughout the year, crabs may burrow into the Bay bottom, shed and mate in shallow waters and beds of bay grasses or swim freely in open water.
Hint Answer Next Slide
II-1E4-20
The first life stage of a blue crab, called the ___________, is microscopic and
lives a planktonic free-floating existence.
Starts with Z
zoea
Hint Answer Next Slide
II-1E4-21
After several molts, the zoea reaches its second larval stage: the ___________. Another molt and a tiny crab form is
apparent.
No hint
megalops
Hint Answer Next Slide
II-1E4-22
How do crabs use the bottom of the Bay?
No hint
Both juvenile and adult blue crabs forage on the bottom and hibernate there
through the winter.
Hint Answer Next Slide
II-1E4-23
Describe the movement & distribution of crabs though the seasons.
No hint
In spring, the crab quickly begins migrating from the southern part of the Chesapeake to tidal
rivers and northern portions of the Bay. During the rest of the year, adult blue crabs are dispersed throughout the Bay, swimming
considerable distances using their powerful paddle-like back fins.
Hint Answer Next Slide
II-1E4-24
A C
B
Label the life stages of a blue crab
Immature crabMegalopsZoea
Hint – word bank Answer Last Slide
II-1E4-25
C. Immature crabB. MegalopsA. Zoea