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The Crustaceans -- Marine Arthropods

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Title: The Crustaceans -- Marine Arthropods


1
The Crustaceans -- Marine Arthropods their
Relatives
  • March 7, 2012

2
ALL ARTHROPODS
  • are covered with an exoskeleton
  • are bilaterally symmetrical
  • have a segmented body
  • have jointed appendages
  • molt

3
What is the difference between an exoskeleton and
an endoskeleton?
4
What does it mean when a crustacean molts?
Video of blue crab moulting
Because they must carry it around, the heavy,
rigid exoskeleton of crustaceans limits their
growth. Most are small.
5
Barnacles vs. Copepods
  • Planktonic larvae sessile adults
  • Filter feeders
  • Planktonic
  • Some filterers some parasitic

6
How can you tell the difference between an
amphipod and an isopod?
  • Amphipods
  • Laterally compressed
  • Isopods
  • Dorsoventrally flattened

7
Giant Isopods- Yikes!
8
What is the significance of krill to the food
chains in polar waters?
Antarctic Krill Provide Carbon Sink In Southern
Ocean ScienceDaily (Feb. 6, 2006) New research
on Antarctic krill (Euphausia superba), a
shrimp-like animal at the heart of the Southern
Ocean food chain, reveals behaviour that shows
that they absorb and transfer more carbon from
the Earth's surface than was previously
understood.
9
Decapods
  • The word decapod means ten legs.
  • This group includes
  • Lobsters crayfish
  • Shrimps
  • Hermit crabs
  • True crabs

10
The Decapod Body Plan
  • cephalothorax

abdomen
11
How can you tell the difference between a male
and female true crab?
Blue Crab Abdomens
As you can see highlighted in red, the aprons
allow you to quickly determine the gender and
maturity of the blue crab.
12
Male - Jimmy
13
Immature Female Sally
14
Mature Female Sook
15
What is the difference between a maxilliped and a
pereopod?
Specialized for walking 5 pairs, first modified
into claws called chelipeds
Maxillipeds
Specialized for bringing food to the mouth,
ripping, tearing, and eating. 3 pairs
Pereopods
16
Swimming Crabs
Clockwise from top left common swimming crab,
ocellated swimming crab, chocolate brown swimming
crab
17
Circulation and Respiration
open
  • Crustaceans have a(n) ____________ circulatory
    system and rely on _____________ to exchange
    gases with their surroundings.

gills
18
Work Cited
  • Anderson, Genny. Buckshot barnacle. Marine
    Science The Splash Zone. 26 June 2003. 9 Feb.
    2009 lthttp//www.marinebio.net/marinescience/03eco
    logy/flimg/02804buk5466.jpggt.
  • "Antarctic Krill Provide Carbon Sink In Southern
    Ocean." Science Daily News Articles in
    Science, Health, Environment Technology. 6 Feb.
    2006. British Antarctic Survey. 09 Feb. 2009
    lthttp//www.sciencedaily.com/releases/2006/02/0602
    06230630.htmgt.
  • Brooks, Cassandra. "Zooplankton Soup Ice
    Stories Dispatches From Polar Scientists."
    Exploratorium. 15 Mar. 2008. 09 Feb. 2009
    lthttp//icestories.exploratorium.edu/dispatches/zo
    oplankton-soup/gt.
  • Copepod shortly before oviposition. Research
    Activities in the Haus des Meeres. Haus de Meeres
    - Aqua Terra Zoo. 9 Feb. 2009 lthttp//www.haus-des
    -meeres.at/forschung/7_copepod.jpggt.
  • Dr. Eckart Pott/Bruce Coleman Ltd. Common
    swimming crab (Portunus holsatus), showing its
    paddle-shaped feet. Encyclopedia Britannica. 10
    Feb. 2009 lthttp//www.britannica.com/EBchecked/top
    ic-art/577077/9685/Common-swimming-crab-showing-it
    s-paddle-shaped-feetgt.
  • Human_endoskeleton. Hermit crab housing Part 1
    how and why, physical. 9 July 2008. Affordable
    Housing Institute U.S. 9 Feb. 2009
    lthttp//affordablehousinginstitute.org/blogs/us/wp
    -content/uploads/imageshuman-endoskeleton-gt.
  • Ironman. Power Suits and Bionic Bones. 2009. How
    stuff works express. 9 Feb. 2009
    lthttp//express.howstuffworks.com/gif/express-exos
    keleton-ironman.jpggt.
  • "Krill Discovered Living In The Antarctic Abyss."
    Science Daily News Articles in Science,
    Health, Environment Technology. 26 Feb. 2008.
    British Antarctic Survey. 09 Feb. 2009
    lthttp//www.sciencedaily.com/releases/2008/02/0802
    25122334.htmgt.
  • Lobster. How stuff works express. 2009. 9 Feb.
    2009 lthttp//express.howstuffworks.com/gif/express
    -exoskeleton-lobster.jpggt.
  • "Lysianassid Amphipod mdash Centre for Marine
    Biodiversity." Centre for Marine
    Biodiversity mdash Centre for Marine
    Biodiversity. 09 Feb. 2009 lthttp//www.marinebio
    diversity.ca/cmb/Photo20galleries/atlantic-benthi
    c-invertebrates/picture10.jpg/viewgt.
  • MacDiarmid, Alison. Crayfish moulting. Crabs,
    crayfish, and other crustaceans. 21 Sept. 2007.
    Te-Ara The Encyclopedia of New Zealand. 9 Feb.
    2009 lthttp//www.teara.govt.nz/EarthSeaAndSky/SeaL
    ife/CrabsCrayfishAndOtherCrustaceans/1/ENZ-Resourc
    es/Standard/2/engt.
  • Matuta / Ashtoret (always confusing these two),
    Madagascar. Flickr.com. 24 July 2008. Lunar
    crab's friendly face. 10 Feb. 2009
    lthttp//flickr.com/photos/80125969_at_N00/2699936081/
    gt.
  • "Nauplius Larva of a Barnacle, Light micrograph
    of Nauplius larva of a barnacle at a
    magnification of x100., Acirccopy Visuals
    Unlimited/Corbis, RM, Animals, Barnacle, Biology,
    Color effect, Crustacean, False color,
    Invertebrate, Larva, Life science, Microbiology,
    Micrography, Natural science, Natural sciences,
    Nobody, One animal, Plankton, Science, Sciences,
    Zoology, Zooplankton." Stock photography,
    footage, rights Corbis. 09 Feb. 2009
    lthttp//pro.corbis.com/search/Enlargement.aspx?CID
    isgmediauid7B0D5B64B4-F4F1-4B15-A2AD-989C3C0AB
    8F77Dgt.
  • Orstan, Aydin. "An isopod from Canada Procellio
    spinicornis." Weblog post. Snail's Tails. 22 Oct.
    2007. 9 Feb. 2009 lthttp//snailstales.blogspot.com
    /2007/10/isopod-from-canada-porcellio.htmlgt.
  • Palaemon pacificus. Key to Aquatic Arthropods.
    2008. AECOS, Inc. 10 Feb. 2009 lthttp//www.aecos.c
    om/CPIE/Palaemon_pacificus.jpggt.
  • SPLASH Protecting Water and Habitat Through
    Education. 09 Feb. 2009 lthttp//www.sacsplash.org/
    cimages/copepod2.jpggt.
  • Swimming crab (Thalamita sp.). Flickr.com. 10
    Feb. 2009 lthttp//flickr.com/photos/wildsingapore/
    427830551/gt.
  • T-800 Endoskeleton Cinemaquette. RTM News. 2009.
    Raving Toy Maniac. 9 Feb. 2009 lthttp//www.toymani
    a.com/news/images/1205_t800.jpggt.
  • Two-eyed or ocellate swimming crab (Portunus
    sebae), Caribbean coast of Panama. Flickr.com. 10
    Feb. 2009 ltTwo-eyed or ocellate swimming crab
    (Portunus sebae), Caribbean coast of Panamagt.
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