Observation 5

(11/12/09)

OBSERVATION 5

The first part of naked eye observation is visible in the glass tank is annelida (white spiral thread-like) at the surface of the glass tank and Cyclops (motile gray spots) in different area around Plant A & B.

Under microscope of high power, I saw many multicellular Cyclops, even young stages of Cyclops swimming around Plant B. Here is MP4 of Lecane Rotifer, identified by Dr. McFarland, is compressed 1.35 megabytes with a playing time of 6 seconds. It is eating or swimming around zygnema. Zygnema's the bunch of green string of filaments.

MP4: Lecane Rotifer

Many of Aspidisca (Paterson 119) are found at surface of the glass tank. It is more round and has a strange mouth as the beak. It has many flagella to move circular in the tank. See the MP4 video of Aspidisca (please excuse the wrong identity of discomporhia) below. It is compressed in 4.75 megabytes and it is under lightfield illumination at a magnification of high power with a playing time of 20 seconds.

MP4: Aspidisca

Noticed the picture of Coleochaete irregularis (Forest 89) from third week of observation is a family to this picture below of figure 1. It is Coleochaete orbicularis (Prescott 105) because of its filaments attached to the discs and it is branching out to stay.

Fig. 1

More picture of figure 2 below seems to look like one of Coleochaete because it has similar structure and it also has filaments attached to the dics except the cell structure is more rod-like. Other one on the picture of figure 3’s seems like first stage of Coleochaete orbicularis or it has lost some of filaments. (1624, 1625)

Fig. 2

Fig. 3

REFERENCES

Forest, Herman Silva. (1959). Handbook of Algae. The University of Tennessee Press. 89

Paterson, D.J. (2003). Free-Living Freshwater Protozoa. Manson Publishing: Washington D.C. 119 (fig 246).

Prescott, G.W. (1964). The Fresh-Water Algae. W.M.C. Brown Company Publishers. 105