1 / 15

Arthropod Crustacean

Arthropod Crustacean. Paula Martinez-Feduchi 9B. Arthropod Crustacean. h) Arthropod iii)Crustacean Scientific name: Arthropoda Crustacea Arthropoda : jointed feet Crustacea : mandibulate aquatic 40,000 named species Likely + 100,000 Life Expectancy:

forbes
Download Presentation

Arthropod Crustacean

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ArthropodCrustacean Paula Martinez-Feduchi 9B

  2. Arthropod Crustacean h) Arthropod iii)Crustacean • Scientific name: ArthropodaCrustacea • Arthropoda: jointed feet • Crustacea: mandibulate aquatic • 40,000 named species • Likely +100,000 • Life Expectancy: • Lobster: up to 50 yrs, max. 100 yrs • Shrimp: to 6 ½ yrs • Crabs: 1-3 yrs

  3. Characteristics • Chitin exoskeleton • Strengthened w/ calcium salts • Stalked eyes • Wax layer on exoskeleton • survive on land w/o loosing too much water • Biramous appendages • 2 pairs of antennae • First pair--similar structure to insects’ • Second pair– pincer-like claws

  4. Characteristics Continued • Molt--shed old exoskeleton • Segmented bodies--somites(segment) • rigid or flexible • Pair of appendages near mouth--functions as jaw • Can be sessile (not moving) ex: barnacle • Live in: • freshwater • Seawater • inland • brines- water w/ high salt concentration • Carapace #9 enfolds trunk can: • split into valves • projects to form rostrum #8

  5. Fossil Record • Cambrian period : 544 to 505 mya • Canadapsis • Perspicaris • Carboniferous period: 360 to 286 mya– all major groups except Eucarida • Examples: • Ostracodda • Branchiopoda • Cirripedia • Eumalacostraca • Maxillopoda

  6. LifeCycle • Egg • Naupilus– head, unsegmented body, antennas, mandible, 1 eye • Zoea– segmented body, appendages, molts several times • Mysis/Megalopa–structures continue to form • Post-Larval– legs for swimming & walking. Full size & adult appearance • Adult– after 1 yr, capable of mating & reproducing

  7. Reproduction • Sexes separated • Change of sex during life • Sexual Reproduction • Hermaphrodites (male & female reproduction organs) • Males attach to interior of mantle cavity • fertilize eggs (barnacles) • Ovaries contain sperm-producing parts beside eggs • Sexual Reproduction • Parthenogenesis– produce eggs that develop w/o being fertilized by sperm • Asexual Reproduction • Mechanically or chemically stimulated

  8. Reproduction Continued • Sexual Dimorphism (diff. appearance male & female) • Males—smaller & parasitic--enter female genital tract • Males--clasping organs hold females • Females release eggs into water • Carry eggs: • Sac on abdomen • pouch behind limbs • Between limbs • Eggs in strings– may be coiled

  9. Diet and Digestive System • Large--bottom-dwelling predators • Suspension feeders-- create water currents • feed on small organisms • Carnivores, herbivores, scavengers and cannibals • Digestive tract--through length of body, can be coiled

  10. Diet and Digestive System Continued • Foregut • simple tube • gastric mill-- ossicles(calcified plates) • move against each other • grind food • Midgut • Before--setae (hair) filter • prevent particles to pass until certain size • Differs in species • 1 or +1 diverticula (pouches)-- different processes • Hindgut • Short • Waste excreted through anus

  11. Respiratory System • Gas exchange--through carapace (outer shell) many blood vessels • Gills • Circulate water past gills--move them • Blood flow in opposite direction than water: • extract more oxygen than in same direction • Tracheal– tubules network brings oxygen, discharge carbon dioxide

  12. Circulatory System • Open circulatory system • Blood flows in sinuses (channels) • Many no heart • Blood in movement by blood pump or body movements • With heart • In blood sinus (cavity) or pericardium (membrane enclosing heart) • Connected by valvularopenings--ostia • Primitive • Long tube w/ spiral muscles • Spreads almost all of trunk • 2 Ostias in each somite except last

  13. Sensory System • Brain • Subesophageal ganglion--connected to nerve centers • Chain of ganglia through trunk • Nerve cord- pair of ganglia per somite • Control appendages • Nerve connections w/ eyes & antennae • Nerve ring around esophagus • Direct to brain

  14. SensorySystem • Stalked eyes- better eyesight • Compound eyes- w/ pigment cells • expand or contract-- see in light intensities • Statocyst • Balance & orientation • Change in orientation • statoliths(small granules) impact w/ setae at angles • Setae--tactile hairs on body • movement in water & touch • Chemicals on antennae & mouth • taste & smell

  15. Bibliography • http://www.lessonsnips.com/docs/pdf/arthropods.pdf • http://www.globio.org/glossopedia/article.aspx?art_id=15 • http://www.enotes.com/arthropods-insects-arachnids-crustaceans-reference/arthropods-insects-arachnids-crustaceans • http://www.woodbridge.tased.edu.au/mdc/Species%20Register/phylum_arthropoda_crustacea.htm • http://www.blurtit.com/q106454.html • http://www.audioenglish.net/dictionary/class_crustacea.htm • http://www.wetwebmedia.com/marine/inverts/arthropoda/crustace.htm • http://bugs.osu.edu/bugdoc/Shetlar/462/462arthropods/Arthropods17.htm • http://zoology.muohio.edu/crist/zoo312/crustaceans.html • http://www.tafi.org.au/zooplankton/about/glossary.html • http://www.waterencyclopedia.com/Ce-Cr/Crustaceans.html#b • http://www.oceaninn.com/the-nature-preserve/crustaceans/ • http://www.biology-questions-and-answers.com/phylum-arthropoda.html • http://www.britannica.com/EBchecked/topic/144848/crustacean/33810/The-respiratory-system • http://www.uwlax.edu/biology/Zoo-Lab/Lab-08/Crayfish-External-Anatomy-2.htm • http://www.eoearth.org/article/Crustacea • http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20102%20lectures/Respiratory%20System/respirat.htm • http://archimer.ifremer.fr/doc/1989/acte-1486.pdf • http://www.ucmp.berkeley.edu/paleozoic/paleozoic.php • http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20102/bio%20102%20lectures/circulatory%20system/circulat.htm

More Related