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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” 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 II-1E4-1 Identify the fish A B D. C. A. B. E. Bluefish Striped Killifish Bay Anchovy Weakfish Striped Bass C Phytoplankton E Bluefish Striped Killifish Bay Anchovy Weakfish Striped Bass Hint – word bank D Answer Next Slide II-1E4-2 Swimmers comprise the _____________ nekton community whose organisms can control and direct their movements. This group includes fish, some crustaceans and other invertebrates. Starts with n Hint Answer Next Slide II-1E4-3 Approximately ______ 350 species of fish can be found in the Chesapeake Bay. 350 475 538 780 Hint – multiple choice Answer Next Slide II-1E4-4 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. True No hint Hint Answer Next Slide II-1E4-5 Smaller resident species, such as killifish, normally occur in shallow water where they feed on a variety of ____________. invertebrates No hint Hint Answer Next Slide II-1E4-6 What is the most abundant fish in the Bay? bay anchovy Initials b.a. Hint Answer Next Slide II-1E4-7 Bay anchovies feed primarily upon zooplankton Adult anchovies also _____________. larval fish may consume _____________, crab larvae and some ____________ _______________. benthic species Initials z, l.f., c.l., & b.s. Hint Answer Next Slide II-1E4-8 In turn, the bay anchovy is a major food source for predatory fish like _____________, and striped bass _____________ bluefish weakfish ________________, as well as some birds and mammals. No hint Hint Answer Next Slide II-1E4-9 Migratory fish fall into two categories: anadromous which spawn in the ______________, catadromous Bay or its tributaries, and ___________ fish, which spawn in the ocean. Makes me think of mice & what eats them Hint Answer Next Slide II-1E4-10 Anadromous fish migrate varying distances to spawn in freshwater and can even be considered Bay residents. For instance, during the spawning season, ______________________ yellow and white perch 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 Hint Answer Next Slide II-1E4-11 _______________ Striped bass 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. Hint Answer Next Slide II-1E4-12 herring Shad ____________ 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-1E4-13 ______________ Eels are the only catadromous species in the Bay. E. Hint Answer Next Slide II-1E4-14 Although they live in the Bay for long periods, eels eventually migrate to the Sargasso Sea __________________ in the central North Atlantic to spawn S. S. Hint Answer Next Slide II-1E4-15 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. 1. Croaker 2. Drum 3. Menhaden 4. Weakfish 5. Spot C, D, M, W & S Hint Answer Next Slide II-1E4-16 The abundance of ________________ supports a commercial fishing industry and provides food for predatory fish and birds. menhaden Not women Hint Answer Next Slide II-1E4-17 ___________ enter the Bay only as young adults or mature fish. Bluefish A color fish Hint Answer Next Slide II-1E4-18 Besides fish, _________________ crustaceans and _______________ invertebrates may be part of the nekton community. No hint Hint Answer Next Slide II-1E4-19 Name five larger animals that enter the Bay though two of the five only occasionally. 1. Sharks 2. Rays 3. sea turtles 4. marine dolphins 5. whales No hint Hint Answer Next Slide II-1E4-20 Why is the blue crab is difficult to place in any one community? 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. No hint Hint Answer Next Slide II-1E4-21 The first life stage of a blue crab, called the ___________, is microscopic and zoea lives a planktonic free-floating existence. Starts with Z Hint Answer Next Slide II-1E4-22 After several molts, the zoea reaches its megalops second larval stage: the ___________. Another molt and a tiny crab form is apparent. No hint Hint Answer Next Slide II-1E4-23 How do crabs use the bottom of the Bay? Both juvenile and adult blue crabs forage on the bottom and hibernate there through the winter. No hint Hint Answer Next Slide II-1E4-24 Describe the movement & distribution of crabs though the seasons. 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. No hint Hint Answer Next Slide II-1E4-25 Label the life stages of a blue crab A C B Immature crab Megalops Zoea Hint – word bank C. Immature crab B. Megalops A. Zoea Answer Last Slide