NO RTW Objective: Agenda: Homework: Monday, April 17th NO RTW Objective: I will be able to review and prepare for the marine science final. Agenda: Marine Science Final Review Packet Homework: None 

Pg. 118 RTW: Which animal phylum do you think has the most species? Tuesday, April 18th Pg. 118 RTW: Which animal phylum do you think has the most species? Objective: I will be able to cite examples and explain the adaptations to the marine environment of the invertebrate phyla: Arthropoda. Agenda: Arthropoda Foldable Arthropoda group be ready to present tomorrow! Homework: None 

Arthropod Foldable Examples: insects, spiders, crabs, barnacles, copepods, shrimp and lobsters. Class Crustacea : mostly marine arthropods Cirripedia- barnacles Copepoda- Copepods Malacostraca- shrimp, lobster, crab General Characteristics: Gill breathing Specialized appendages for feeding, walking, defense… (jointed appendages) Larvae is planktonic Grow via molting Bilaterally Symmetric Exoskeleton made of chitin hardened by CaCO3

Arthropod Foldable Diagrams: Reproduction: Sexual Some will carry eggs attached to abdomen until they hatch.

Phylum Arthropoda Class Crustacea

Largest phylum of animals w/ approx One million known species

Includes: insects, spiders, crabs Barnacles, shrimp, & lobsters

General characteristics Bilaterally symmetric Have jointed appendages (legs & mouth parts) Exoskeleton made of chitin and hardened by CaCO3 Grow by molting

Molting: Old exoskeleton is shed leaving the animal soft The animal brings in water to expand itself A new exoskeleton is secreted by specialized tissue

Exoskeleton provides protection, support, & flexibility Also imposes limitations to grow & size

Class: Crustacea 30,000 species primarily marine Gill-breathing 16-20 segments Open circulatory system Specialized appendages for food gathering, walking, fighting, defense, etc. Start out life as a planktonic larvae Ex: lobsters, crayfish, shrimp, crabs, copepods, barnacles, etc. Giant King Crab = largest crustacean (~12ft) Heaviest is the lobsters (up to 48 lbs!!)

Have two pairs of antennae (one pair smaller than the other) Small, planktonic crustaceans include copepods, barnacles, isopods, krill

Barnacles Chitin exoskeleton & secretes CaCO3 shell. Feathery feet for filter feeding plankton Some attach to docks or boats and a few on whales Must close up with an operculum during low tide to avoid desiccation (drying up).

Other larger crustaceans include shrimp, lobsters & crabs Considered decapods (5 pairs of legs) Body consists of cephalothorax (fused head & thorax) & abdomen

Crabs have a compact abdomen & a broad cephalothorax Abdomen usually tucked under

Male Female

Abdomen with eggs

Videos Horseshoe Crab Molting Horseshoe Crab Mantis Shrimp

Lobsters http://www.youtube.com/watch?feature=endscreen&v=d5uQ317Osxw&NR=1&safety_mode=tr ue&persist_safety_mode=1&safe=active Slipper lobster http://www.youtube.com/watch?v=8gBtsboSkOU&safety_mode=true&persist_safety_mode=1 &safe=active Spiny Lobster http://www.youtube.com/watch?v=o2QDJwOIa7s&safety_mode=true&persist_safety_mode=1 &safe=active Lobster Life Cycle: Safari Montage

Giant Spider Crab

King and Coconut Crabs

No RTW: Arthropoda group be ready to present when the bell rings! Wednesday, April 19th No RTW: Arthropoda group be ready to present when the bell rings! Objective: I will be able to cite examples and explain the adaptations to the marine environment of the invertebrate phyla: Arthropoda. Agenda: Arthropoda Fish Food Presentation Mollusca group be ready to present Friday! Homework: None 

Pg. 118 RTW: What is one interesting fact about Arthropoda? Thursday, April 20th Pg. 118 RTW: What is one interesting fact about Arthropoda? Objective: I will be able to cite examples and explain the adaptations to the marine environment of the invertebrate phyla: Mollusca. Agenda: Mollusca Foldable Mollusca group be ready to present tomorrow! Homework: None 

Mollusca Foldable Examples: Class Gastropoda- Snails Class Bivalvia- Clams Class Cephalopoda- Octopuses, Squids General Characteristics: Most numerous marine group, very diverse. Soft body covered in CaCO3 (bivalves & gastropods) One way digestion Some herbivores and some carnivores

Mollusca Foldable Diagrams: (please label the class under your diagram) Reproduction: External fertilization- bivalves, chitons, & some snails Sperm & eggs are released into water Internal fertilization-cephalopods & most snails Cephalopods have modified arm (Hectocotylus) to transfer sperm to female

Phylum Mollusca

Includes these classes: Snails-class Gastropoda Clams-class Bivalvia Octopuses, Squids-class Cephalopoda There are more species of mollusks in the ocean than any other group Soft body protected by a shell of calcium carbonate Very diverse in body structures and habits

Mollusk Diversity

Biology Much more complex than Cnidarians or Sponges Has a separate mouth and anus (1 way) Has salivary and digestive glands herbivores & carnivores (predators & filter feeders) circulatory system transports nutrients and oxygen Heart pumps blood to all tissues Most have open circulatory system (leaky), cephalopods a closed circulatory system

Nervous system simple to complex Most have separate sexes Some species are hermaphrodites External fertilization- bivalves, chitons, & some snails Sperm & eggs are released into water Internal fertilization-cephalopods & most snails Cephalopods have modified arm to transfer sperm to female

class Gastropoda Snails-”stomach foot” Largest group Approx 90,000 species Mostly marine Body is coiled up inside shell Shell sits on a ventral foot

Nudibranch (sea slug- no shell) Tulip snail (with shell)

Body Structure thin layer of tissue that produces the shell muscular, used in locomotion some are well developed & have eyes area with small teeth used in scraping algae or other food from surfaces, made of chitin hard plate used to close opening once head/foot retracts into shell Gas exchange is through gills Mantle Foot Head Radula Operculum

class Bivalvia Oysters (cement themselves to hard surface) Clams (burrow) Mussels (attach to rocks using byssal threads), Body compressed between two shells Very large source of food for humans and other marine animals.

class Cephalopoda-2 in to 30 ft Cephalopods-most complex brain of all invertebrates considered intelligent and capable of learning Most cephalopods display color changes correlated to certain behaviors Hectocotylus-Specialized arm transfers a spermatophore (packet of sperm) After eggs hatch female usually dies

Blue-ringed Octopus (Hapalochlaena) giant pacific octopus - Octopus dofleini

Giant Squid

Cephalopoda Camouflage Octopus vs Crab Cone Snail

No RTW: Mollusca group be ready to present when the bell rings! Friday, April 21st No RTW: Mollusca group be ready to present when the bell rings! Objective: I will be able to cite examples and explain the adaptations to the marine environment of the invertebrate phyla: Mollusca. Agenda: Mollusa Fish Food Presentation Homework: None :)