observation five 11/10/10

Observation: Today when I came upon my micro-aquarium the top was off and it looked like a little of the water had evaporated.  None the less when I looked at my micro-aquarium under the microscope I did not see the dead zone I observed last week. This week some of the organisms I observed in passed weeks had returned although not all of them. I still did not see any Vorticella. I did see a Marochaetus (Donner) and some Rotifers moving around this coincided with the fact that I did not notice any Actinophrys, which were the only organisms I saw last week.

   

Marochaetus prefer to live in mud or places with lots of cover or sediment.

  Rotifer are small aquatic organisms that can live in a variety of environments such as arctic lakes. They use their tail to propel themselves though the water in search for food (Gilbert).  

Citations: 

Dormancy in Rotifers

John J. Gilbert

Transactions of the American Microscopical Society
Vol. 93, No. 4, Symposium: Perspectives on the Biology of Dormancy (Oct., 1974), pp. 490-513

Published by: Blackwell Publishing on behalf of American Microscopical Society

Stable URL: http://www.jstor.org/stable/3225154

Donner, Josef. Rotifers. Frederick Warne & Co. 1966