1. Some announcements… Lab is worth 140 points, including 50 points for participation and attendance Points off for tardiness and absences Exams include material from text, other readings, lecture and lab. Study guide to exam will be online by next Thursday before field trip 5-minute presentations are worth 5 points extra credit.

2. Today: - Martin Marquez presentation (online, too) -Invertebrates - Sponges & Cnidarians -The ultimate cooperators!

3. Animal Beginnings: The Protozoans Fig. 5.2, A planktonic foraminiferan, Globigerina. (a) Drawing of an intact animal emphasizing extended pseudopodia. From Brady 1884. (b) Photograph of Globigerina test. Chapter 5

4. Defining Animals Members of kingdom Animalia are typically distinguished from the Protista by the presence of contractile muscles, signal-conducting neurons, and multicellular bodies Chapter 5

5. Other characteristics (=characters) of animals: Ingest food particles for nutrition (heterotrophic) Greater dependence on sexual reproduction (comp with protists)

6. 25 phyla of animals are significantly represented in marine environment (table 5.1, text) 13 phyla exclusively marine, 7 phyla50% or more marine 20 phyla (80%) marine or mostly marine

7. Chapter 5

8. Sponges (Phylum Porifera)  Multicellular (loosely aggregated cells)  No true tissues (totipotent cells = have potential to become any other cell type)  Pores, holes and channels  Mostly marine  Internal support with spicules (of calcium carbonate, silica, spongin)

9. Sponges Fig. 5.6 A group of marine finger sponges and several of the specialized cell types that make up the sponge wall. Chapter 5

10. Sponges (Phylum Porifera), more characters…  Aquiferous system (pump water through their bodies) for feeding, reproduction, gas and nutrient exchange  Asexual and sexual reproduction  Many symbioses with bacteria and other animals! (video clip on shrimp in sponge cavities)

11. Field Trip information!

12. US State Department Public Announcement http://travel.state.gov/travel/cis_pa_tw/pa/pa_2100.html

13. Posted on course web page “announcements”

14. For entire release form, see course web page “announcements” Sign release form in lab on Monday …

15. Field Trip Update Must tell me (KM) or TA by Monday in lab Feb 7 at latest if you are not going on field trip, $8.50 due in lab for one dinner. No-shows on field trip lose 50 points Sign slip acknowledging risk and presentation Sign in today that you heard presentation $50 refund if you don’t go (credit to account) Alternative assignment worth 100 pts (17% of grade)

16. Alternative Assignment to Field Trip (100 pts) lab practical on invertebrate classification and ecology in lab, Feb 14th (50 pts), AND 10 page research paper on pre-approved topic (summarizing 6 minimum research articles from primary lit) (40 pts) Due Feb 28, AND Public presentation on paper topic (webpage, or 5-minute presentation in lecture/lab, or printed flyer/brochure) due Feb 28th (10 pts) posted on course webpage http://eebweb.arizona.edu/COURSES/Ecol183/index1.html

17. Questions? Contact me at 626-5076, mangin@u.arizona.edumangin@u.arizona.edu To summarize field trip update: Field trip is optional (due to public announcement) Alternative assignment is rigorous, and worth 17% of grade MUST tell me or TA in lab Feb 7 if you are NOT going We will assume that you ARE going if we don’t know by end of your lab next Monday No $50 credit if we don’t know by Monday. Feb 7 lab, and minus 50 points if you are a no-show for field trip Course website has public announcements