Thursday, November 6, 2008

MicroAquarium Observation Week 3




















It's Week 3 of the observation and I've noticed a slight very slight decrease in Colpidiums in the tank, but they are still rapidly and randomly moving everywhere. I also noticed that the randomly, moderately moving Chilonomas stayed about the same, while the mainly stationary photosynthetic cyanobacteria nearly doubled in number. The very large Philodina is still alive and moving around just as swiftly as ever. There is still an innumerable amount of Phacus and Euglena (pg 146, Rainis and Russell) in the tank. In addition, there are also still several slow-moving large, orange, and round Arcella(First picture at the top) (Figure 173 pg 91 Patterson and Hedley) in the microaquarium. There were some new discoveries in the tank this week. One of the few new discoveries in the tank was all the different kind of dinoflagellates, such as Peridium cinctum (Figs 980-983 pg 308, Tiffany and Britton). They swim randomly and moderately fast. In addition, there were many, many Rodifers(third picture from the top) in the tank. These are somewhat big in size and they swim around relatively fast and dig under the dirt and they like to swim in the dirt as well. There were also many flagellates, Peranema(Fig 71 pg 52 Paaterson and Hedley) mainly, and they were attacking an organism that was unidentifiable because they wouldn't move away from the organism so it could be indentified. The cyanobacteria that was mentioned earlier had two different varieties in the tank. Below are some pictures of the different species of cyanobacteria. One species was not easily identified but they were J-shaped with what look like heterocists on the end of their tails(pictured above to the immediate left and the second picture from the top)[taken in the lab]) and the other species was identified as Nostoc carneum (the fourth picture from the top) (pg 407 figure 642 Handbook of Algae) they have a ball in the middle of their bodies. I apologize for the disarray of the pictures. This happened because my computer keeps freezing up when i try to move them.
















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