Observation 1 --- Week 3 (observation time: 2nd Nov 2012)

I miss the first week's observation, therefore my first observation is about 12 days later from the start, on 2nd Nov, and there are huge changes within these 12 days.

Fig 3 

   

1.Chironomus 

From the picture we can see there is a insect at the up right coner, lets have a closer look 

 

Fig 3.1

   I lost this insect when i was doing my observation under microscope. however i found out the remains of the larva of this insect

Fig 3.2

 Referance:

Ward HB, Whipple GH. 1918. Fresh-Water Biology. New York: Jonh Wiley & Sons, INC. Fig 1384, 915p.

2.Anisonema

 During the observation, i found a interesting single cell organism with two tails at each side of the cell. It moves in a normal speed, therefore i am able to get clear pictures under microscope.

   

Fig 4.1

I also got another picture the two Anisonema hold together, i guess they may have some kind of comunication between. see Fig below 

Fig 4.2  

Referance:

    Patterson DJ.1992. Free-Living Freshwater Protozoa. Washingon DC: ASM Press. Fig 78, 54p. 

3.Vorticella

This is bell shape single cell organism attaching to the plant stem, it is Vorticella, they always comes with several individual together. see fig below

Fig 5.1

 Let's get a closer look of this organism. This organism almost keep stationary all time, the bell head may shake a little bit according to the water flows nearby.

 Fig 5.2

 Referance:

    Patterson DJ.1992. Free-Living Freshwater Protozoa. Washingon DC: ASM Press. Fig 232-236, 113 p.

4.Eucblanis

Eucblanis is the very unique organism i found in the observation. it moves in a fast speed with the help of its tail. 

 Fig 6

Referance:

Smith DG. 2001. Penna's Frashwater Invertebrates of The United States. New York: John Wiley & Sons, INC. 131p.  

5.Coleps

From the Larva of the Chironomus, i observed a gourp of single cell oganisms moving rapidly in side the remains of the Chironomus. Below is the short vedio i recorded

blow is the simple coleps i found from the microscope, this organism is moving very fast, but sometimes it will just keep stationary for a second or two. 

  

Fig 7

 Referance:

    Patterson DJ.1992. Free-Living Freshwater Protozoa. Washingon DC: ASM Press. Fig 375-377, 162 p.