Chesapeake Bay: An Introduction to an Ecosystem Section 4: Communities II-1E4: Swimmers View this quiz as a slide show from “the beginning” During the slide show, you can right click on any slide and choose pointer options then pen or highlighter to write on any slide. But you will need to right click & choose pointer options then arrow before you can click on any of the navigation links again. Click to Start

Identify the fish Phytoplankton Hint – word bankAnswerNext Slide II-1E4-1 A D C B E Bluefish Striped Killifish Bay Anchovy Weakfish Striped Bass D. Bluefish C. Striped Killifish A. Bay Anchovy B. Weakfish E. 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 HintAnswerNext Slide II-1E4-2

Approximately ______ species of fish can be found in the Chesapeake Bay Hint – multiple choiceAnswerNext 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 HintAnswerNext 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 HintAnswerNext Slide II-1E4-5

What is the most abundant fish in the Bay? Initials b.a. bay anchovy HintAnswerNext Slide II-1E4-6

Bay anchovies feed primarily upon _____________. Adult anchovies also may consume _____________, ____________ and some _______________. Initials z, l.f., c.l., & b.s. HintAnswerNext Slide II-1E4-7 larval fish zooplankton crab larvae benthic 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 HintAnswerNext Slide II-1E4-8 weakfish striped bassbluefish

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 HintAnswerNext Slide II-1E4-9 catadromous anadromous

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 HintAnswerNext 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 HintAnswerNext 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 HintAnswerNext Slide II-1E4-12 herring Shad

______________ are the only catadromous species in the Bay. E. Eels HintAnswerNext 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. Sargasso Sea HintAnswerNext 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.Croaker 2.Drum 3.Menhaden 4.Weakfish 5.Spot HintAnswerNext Slide II-1E4-15

The abundance of ________________ supports a commercial fishing industry and provides food for predatory fish and birds. Not women menhaden HintAnswerNext Slide II-1E4-16

___________ enter the Bay only as young adults or mature fish. A color fish Bluefish HintAnswerNext Slide II-1E4-17

Besides fish, _________________ and _______________ may be part of the nekton community. No hint HintAnswerNext Slide II-1E4-18 invertebrates crustaceans

Name five larger animals that enter the Bay though two of the five only occasionally. No hint 1.Sharks 2.Rays 3.sea turtles 4.marine dolphins 5.whales HintAnswerNext 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. HintAnswerNext 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 HintAnswerNext 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 HintAnswerNext 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. HintAnswerNext 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. HintAnswerNext Slide II-1E4-24

A C B Label the life stages of a blue crab Immature crab Megalops Zoea Hint – word bankAnswerLast Slide II-1E4-25 C. Immature crab B. Megalops A. Zoea