Hematopoiesis, Kazal Inhibitors and Crustins in a Crustacean
Crustacean powerpoint
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Transcript of Crustacean powerpoint
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CRUSTACEA
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• Phylum Arthopoda• Subphylum Crustacea• 30,000 species•Mostly marine
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Examples of Crustaceans
Crabs
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Examples of Crustaceans
Shrimp
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Examples of Crustaceans
Lobster
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Examples of CrustaceansBarnacles
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Examples of Crustaceans
Copepods – 70% of all Crustaceans
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Examples of Crustaceans
Krill – greatest biomass of any species on earth
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Examples of Crustaceans
Isopods
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Examples of Crustaceans
Amphipods
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ANATOMY
• Anatomy varies depending on type of crustacean
• Body divided into two major parts:Cephalothorax – head and main body cavityAbdomen – muscular, segmented dorsal part of
body
• Usually 16 – 20 body segments• Carapace – shell covering cephalothorax
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cephalothorax
abdomen
carapace
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ANATOMY
• Many specialized, jointed appendages:– Gills – usually underneath for breathing– Walking legs - pereopods– Swimming legs - pleopods– Feeding appendages
• maxillipeds and mandibles - mouthparts• chela - claws
– Sensing - antennae– Defense– Tail – telson and uropods
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pereopodsgills pleopods
antennae
chela
eye
telson
shrimp anatomy
uropods
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antennachela eye
walking legs
abdomenswimming
legs
carapace
crab anatomy – dorsal view
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mandibleschela eye
abdomen
crab anatomy –ventral view
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Crustacean Feeding
• Methods vary:• Predators and scavengers – crabs and lobsters• Filter feeders – barnacles• Parasites – isopods (fish lice), whales
barnacles
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Crustacean Reproduction
• Separate sexes• Males release sperm packetusing modified appendages• Females mate during molting – hold sperm packet untilfertilization• Females carry fertilized eggs under abdomen until hatching
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Crustacean Life Cycle
• Meroplanktonic larvae
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Other Facts
• Largest – king crab – legspan of 12 feet• Heaviest – 48 pound lobster