Tuesday, November 1, 2011

Week 3 Observations

On Friday October 21, 2011 "ONE" Beta Food Pellet was inserted into each MicroAquarium according to Dr. McFarland. On Thursday October 27, 2011, I observed that my MicroAquarium was teaming with life. I observed groups of Vortecilla sp. on the plants placed in my MicroAquarium. I also observed mites, nematodes, and Rotifera swimming around my MicroAquarium. I observed what looked like an amoeba surrounded by small moving dots, Dr. McFarland told me that it was an amoeba and it was surrounded by bacteria. The amoeba would slowly move over clumps of bacteria and engulph them in a vacuole like substance so that it could absorb them and use them as a food source. As I was observing an Epalxis, Dr. McFarland pointed out an unuasual organism that moved quickly past the screen. We took pictures of it and after doing some research discovered that it was a type of amoeba know as Amoeba radiosa. It is the floating form adopted by an amoeba. I was also able to observe a Volvox and Saprodinium in the aquarium.

Amoeba sp. absorbing bacteria.  Patterson D.J. 1996.  p80.


 Floating Form adopted by amoeba. Patterson D.J. 1996.  p80 Figure 142.

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