1. Arthropods Animals with jointed appendages

2. General Characteristics of Arthropods §Most successful phylum of animals l jointed appendages l Exoskeleton §exoskeleton l protein + chitin l molting §two marine groups: l chelicerates l mandibulates Crabzilla a 100 year old crab Living in an England Aquarium

3. Horseshoe crab North Shore,LI

4. Chelicerates §Chelicerata §Horseshoe crabs l shallow coastal waters l cephalothorax, abdomen, telson l Six pairs of appendages

6. Horseshoe crabs on Long Island §Can be found on the North shore on/in the sound Late May they mate at night Near the shore. Sexually mature around 8-10 years of age. This is a problem because they are overharvested for bait.

7. Horseshoe crabs as pets?????

8. Chelicerates §Sea spiders l common in polar seas l 8-16 walking legs l male carries eggs l feed on invertebrates with their proboscis l Not true spiders l http://www.youtube.c om/watch?v=cQOS_ mBlbms&safety_mod e=true&persist_safety _mode=1&safe=activ e http://www.youtube.c om/watch?v=cQOS_ mBlbms&safety_mod e=true&persist_safety _mode=1&safe=activ e Ahhhhhhhh

9. Sea Spiders: Science Fiction based on oceans marine life. §http://www.popscreen.com/v/6pa1m/Promet heus-Giant-Facehugger-Scene-Cuddleshttp://www.popscreen.com/v/6pa1m/Promet heus-Giant-Facehugger-Scene-Cuddles http://www.youtube.com/watch?v=uuapyExYJBI&safety_mode=true&persist_safety_mode=1&safe=active

10. Mandibulates §Have Mandibles §Mandibulates include crustaceans l Examples: decapods, krill, copepods, amphipods, barnacles, mantis shrimp, lobsters §head, thorax, abdomen §walking legs and swimmerettes §gas exchange through body surface or gills §molting decreases as animal ages

11. Krill Blue crab Lobster Copepod Barnacles Fairy Shrimp Mantis Shrimp Amphipod

12. Decapods: “ten feet” §Crabs, lobsters, true shrimp §5 pair of walking legs, first pair are chilipeds (pinchers) §range in size up to 4 meters (giant spider crab) §behavioral adaptations l hermit crabs l blue crabs

13. Mantis Shrimp §Predators of fish, crabs, shrimp, molluscs §tropical seas up to North Atlantic §rocks or coral crevices or in burrows §second pair of appendages is enlarged with a movable finger, punch their prey with over 50 mph hits.

14. Krill § Krill averages only about two inches in length, but it represents a giant- sized link in the global food chain. §They are the fuel that runs the engine of the Earth’s marine ecosystems.

15. §Krill feed on phytoplankton, that drift near the ocean’s surface and live off carbon dioxide and sun’s rays. They in turn are the main staple in the diets of hundreds of animals, from fish, to birds, to baleen whales. http://www.youtube.com/watch?v=01Runa3neb0&featu re=related&safety_mode=true&persist_safety_mode=1 &safe=active http://www.youtube.com/watch?v=01Runa3neb0&featu re=related&safety_mode=true&persist_safety_mode=1 &safe=active

16. Amphipods §3 posterior pairs of appendages turned backward;look like shrimp. §beach fleas are terrestrial but retained gills, so must stay in moist sediments. §Important for the food chain

17. Copepods §Most abundant members of zooplankton; §important food source §vertical daily migration §suspension feeders primarily, some are carnivorous and some have wives that are computers

18. Ohhhh Barnacles §Sessile (do not move) §exoskeleton of calcium carbonate §cirripeds stick out of shell to filter feed §larvae with compound eyes and carapace of two shell plates. When larvae settles, it adheres and metamorphoses into an adult. Barnacle with legs out feeding

19. Can you name that Long Island Arthropod? 1.1. 4.4. 3.3. 2.2. 5.5. 6. 7.7.

20. Giant spiny lobster

22. Lobster decline in NYS Fisheries. Why?