Monday, November 15, 2010

Week 5

Observations
The web of filaments continued to reign. The segmented cyanobacteria is lightly covering the lower portion of the  aquarium. There was a lack of seed shrimps, and I specifically observed a dead seed shrimp resting in Plant B. I captured the image below to illustrate not only the seed shrimp, but also the filamentous cyanobacteria:



Overall my MicroAquarium was relatively inactive. In addition to the cyanobacteria and the rare spottings of seed shrimps, I also observed a significant amount of water fleas, also known as daphnia. These water fleas were scattered along the top layer of the soil and both plants. I once again observed two cyclops. According to Ken McFarland, they were young. Both a water flea and one of the cyclops are pictured in the photo below:


Of the few remaining organisms, I luckily observed the annelid, a typical inhabitant of my aquarium. It was actively taking in particles, allowing me to see the particles' movement through its clear skin. There were also two active planerians. These organisms emit a bovine quality, but both planerians were actively weaving through the open water and the soil, often times coming into contact with one another.

The identification of each of these creatures was found using:

Thorp, James H. and Alan P. Conch, eds. 1991. Ecology and Classification of North American Invertebrates. Academic Press, Inc, San Diego, CA.

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