1 / 21

Crustaceans: A Guide to Barnacles, Copepods, and Ostracods

Explore the fascinating world of crustaceans including barnacles, copepods, and ostracods. Learn about their anatomy, development, and ecological roles in the marine environment.

mtenney
Download Presentation

Crustaceans: A Guide to Barnacles, Copepods, and Ostracods

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. ZOO 115 Invertebrate Zoology Subphylum Crustacea Part II

  2. Copepods Barnacles Ostracods Branchiura • Tantulocarida • Pentastomida • Mystacocarida http://www.sacsplash.org/cimages/Copepod.jpg http://museum.utep.edu/archive/arthropods/ostracod.jpg http://www.ucmp.berkeley.edu/arthropoda/crustacea/images/branchiura3.jpg http://shiftingbaselines.org/blog/Barnacle.jpg Class Maxillopoda • Small crustaceans with a small trunk • Subclasses • Thecostraca* • Copepoda* • Ostracoda* • Branchiura*

  3. http://hthbiotech.sandiegostc.org/boat_channel/animals/w-barnacle.gifhttp://hthbiotech.sandiegostc.org/boat_channel/animals/w-barnacle.gif http://www.dereila.ca/dereilaimages/Gooseneck%20Barnacle.jpg http://www.werc.usgs.gov/news/2003-02-06b.jpg Subclass Thecostraca (Barnacles) • Most sessile • Acorn • Stalked (Gooseneck) • Some Parasitic

  4. http://www.forsea.org/bncle4.gif http://www.mesa.edu.au/friends/seashores/images/barnacle2.jpg http://www.mesa.edu.au/friends/seashores/images/barnacle.gif Subclass Theostraca - Anatomy • Sessile forms • Shell (calcareous plates) for preventing dessiciation and protection • Hermaphrodites • Penis 15X body length

  5. http://www.microscopy-uk.org.uk/mag/imgjan99/cypbar.jpg http://www.microscopy-uk.org.uk/mag/imgjan99/naup.jpg Subclass Thecostraca • Development • Nauplius larvae • Cypris larvae

  6. http://www.ambio.bham.ac.uk/images/text%20images/barnacle2.jpghttp://www.ambio.bham.ac.uk/images/text%20images/barnacle2.jpg Subclass Thecostraca • Economic importance

  7. http://www.biosci.ohiou.edu/faculty/currie/ocean/gallery/calanoid-copepod.jpghttp://www.biosci.ohiou.edu/faculty/currie/ocean/gallery/calanoid-copepod.jpg Subclass Copepoda • Number of species • ~ 12,000 species • 2nd largest class in Arthropoda (Malocostraca 1st) with respect to number of species • Possibly numerically the most abundant metazoans on earth. • Size • Most small 1-5 mm • Some freeliving up to 17 mm • Parasitic up to 32 cm

  8. Simple Median Eye Caudal Rami http://www.wsg.washington.edu/images/copepod.gif http://www.sahfos.ac.uk/images/education/a_level/Images/Copepod%20morph.jpg Subclass Copepoda – General Anatomy • Single median eye • Distinctive narrowing of body at abdomen • No abdominal appendages • Well developed caudal rami

  9. http://www.biosci.ohiou.edu/faculty/currie/ocean/gallery/calanoid-copepod.jpghttp://www.biosci.ohiou.edu/faculty/currie/ocean/gallery/calanoid-copepod.jpg Subclass Copepoda – Calanoid • Live primarily in plankton • both marine and freshwater • 1st pair of uniramous Antennae for propulsion and flotation • In males used to hold female for copulation • 2nd pair of biramous antennae for propulsion • Large oil sac in thorax for flotation and food reserves (often red or blue)

  10. Pareuchaeta norvegica (Foto: Hege Vestheim) http://www.ucmp.berkeley.edu/arthropoda/crustacea/images/copepoda03.jpg From Ruppert, Fox and Barnes (2004) Subclass Copepoda – Calanoid • Suspension feeders • 2nd pair of maxilla used for suspension feeding • Few are predators • Few are omnivores Eats juvenile fishes

  11. Tigriopsis californicus Tisbe sp. http://www.fish.washington.edu/people/cordell/images/Tisbe.JPG Swarms over small fish, eats fins then devours the body as it drifts to the bottom http://www.bio.unc.edu/faculty/willett/lab/copepod2.jpg Subclass Copepoda - Harpacticoid • Most epibenthic • most detrivores • some predators • some planktonic forms • Also use large oil sac for flotation and food reserves (often red or blue) • Some predators

  12. Cyclops sp. http://www.microscopy-uk.org.uk/micropolitan/fresh/arthropod/cyclops2.jpg Subclass Copepoda - Cyclopoid • Most planktonic • most predators • some suspension feeders

  13. Psychrolutes sp (Fathead fish) Subclass Copepod - Parasites • Ectoparasites • Endoparasites

  14. Cyclops sp. http://www.microscopy-uk.org.uk/micropolitan/fresh/arthropod/cyclops2.jpg Subclass Copepoda • Fertilization is internal • indirect with spermatophore • Males usually smaller than females • Some brood eggs • Some release eggs into sea

  15. http://www.serc.si.edu/labs/phytoplankton/guide/addtl_collections/Microzoops/Images/Copepod-nauplii-BEL.jpghttp://www.serc.si.edu/labs/phytoplankton/guide/addtl_collections/Microzoops/Images/Copepod-nauplii-BEL.jpg http://cyclot.hp.infoseek.co.jp/kenmiji/cyccop2.jpg Subclass Copepoda • Nauplius larva • Copepodid larva • Freshwater forms can create cysts to protect them in winter.

  16. Eye Ostracods http://museum.utep.edu/archive/arthropods/ostracod.jpg Subclass Ostracoda (seed shrimps) • Found in freshwater and marine • swim or crawl • Most < 1mm • Gigantocypris 25mm • Enclosed in a bivalve shell but not hinged

  17. http://www.geo.arizona.edu/palynology/geos462/ostracod.gif Subclass Ostracoda (seed shrimps) • 1st antennae used for sensory but sometimes digging • Swim (and sometimes walk) with 2nd antennae

  18. http://www.senckenberg.de/images/Templates%20Paul/070305_gigantocypris.jpghttp://www.senckenberg.de/images/Templates%20Paul/070305_gigantocypris.jpg Subclass Ostracoda (seed shrimps) • Nutrition • Most suspension feeders • some predators or scavengers • Gigantocypris sp is known to feed on fish • some deposit feeders

  19. http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/ostracods-11.jpghttp://www.eeob.iastate.edu/faculty/DrewesC/htdocs/ostracods-11.jpg Subclass Ostracoda (seed shrimps) • Large fossil record • most extensive of any crustaceans • continuous from Cambrian period

  20. Subclass Ostracoda (seed shrimps) - Reproduction • Most use bioluminescence to attact mates • Fertilization is internal and direct • some freshwater species are parthenogenic (like the Cladoceran Daphnia) • Nauplius larvae

  21. Suckers http://www.fao.org/docrep/008/v9551e/V9551E38.jpg http://www.ucmp.berkeley.edu/arthropoda/crustacea/images/branchiura2.jpg Subclass Branchiura (fish lice) • Ectoparasites • marine and freshwater fish • In Argulus sp, large preoral spine connected to poison glands • Can swim • Copulation occurs on host but eggs deposited elsewhere

More Related