Arthropods: “Jointed Foot” Crustaceans

Characteristics Examples Picture

Swimmers Play a central role in _________________________.

• Primary and secondary consumers of phytoplankton and zooplankton; many organisms have ability to eat them

How do they eat? ________________________________ What is used to swim? ________________________

________________

They are sessile filter feeders. What do they eat? ___________________________________ What are common places they permanently attach? __________________________________ Two groups: gooseneck and acorn Bodies enclosed by heavy plates Live in intertidal to shallow subtidal zones Development: _N________________ _C_________________ __a_______________

________________

Major piece of ____________________________ How do they eat? _________________ What are they classified as? ______________ What do they do twice a day? Vertical migration( swimmers) Bioluminescent, Most numerous animals on earth; exceeds total human weight on the planet

________________

Are not true crabs and are part of a primitive group. What does it include? ____________________________________________________________________ Scavengers. When do they eat? night Have six pairs of appendages, one used for feeding Can walk or swim. How can they swim? ______________________________________ Three regions: cephalothorax, abdomen, telson What is the hard outer covering called? ___________________________________ Lay eggs on the beach. Which is the smaller gender with claspers? MALE or FEMALE (circle)

________________

General Characteristics Examples C

rust

acea

ns: D

ecap

ods (

10 le

gs)

Mostly scavengers and omnivores. What lifestyle do they have? _______________________ What are their claws used for? ________________________________________________________ Largest group of crustaceans (10,000 species) and largest crustaceans in size Live in intertidal and subtidal zones Structure

• Pereopods: 5 Pairs of legs – first pair has claws • Maxillipeds: Filter devices located near mouth - three pairs • Carapace: Head is fused with some body segments that covers the anterior half of the body (______________) like armor • Abdomen: Rest of decopod body

Shrimp, crabs, lobsters

Characteristics Picture Shrimp

• Broad term • Live on muddy and rocky bottoms: subtidal. Considered Nekton or Plankton depending on size.

• Which can they do better? SWIM or WALK (circle) How do they swim? _____________________ • Important food source for fish and whales • What do they eat? ______________________________________________________

Blue Crab • Omnivores; swim or walk • What live style do they have? ___________________ • Live on subtidal rocky or muddy bottoms. Tropical to mid-latitude waters.

• What are males called? ___________________ What are females called? ___________________________

• How can you determine gender? ____________________________

Lobster • What is their life style? ________________________; swim or walk • Live on the subtidal rocky or muddy bottoms. Tropical to mid-latitude waters.

• Use ________________________ as sensors • What color is their blood? __________________________ why? _____________________________________________

• The green in lobster is due to a special pancreas. • Eat live prey such as small fish and mollusks. Sometimes eat other lobsters