The rotifers are little organisms with bilateral symetry. They have a side between 50 micrometers and 3 millimeters. They have lashes around their mouse and these lashes make them move forward. Some rotifers are free swimming, others move by inchworming along a substrate, and some are sessile, moving inside tubes or gelatinous holdfasts that are attached to a substrate. Rotifers are an important part of freshwater zooplanktons being a major foodsource and with many species also contributing to the decomposition of soil organic matter.
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Temperature results (Aline and Juliette)
This graph shows the evolution of the temperature of two artificial puddles during two weeks.
We have measure the temperature of the inside puddle in blue and we have measure the temperature of the outside artificial puddle in red.