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KIERON HARPER DAPHNIA PROJECT Introduction One of the most common inhabitants to be found in lakes, ponds and quiet streams are Daphnia (Also known as the water flea). Daphnia are usually less than 3mm in size and are closely related to Crab and Shrimp, and therefore a crustacean. Daphnia are commonly so called "Water Fleas" due to there erratic jumpy swimming motion through the water, caused through there second antenna being thrust downwards. Daphnia are vital elements of the food chain in fresh water areas, as they are a staple diet of small and large fish alike, and keep the water clear as part of the vital plankton feeding community. Daphnia feed on bacteria, yeast, micro-algae, detritus, and other organic matter. Their limbs draw water, which contain food particles towards their mouths. Before being swallowed the food passes through sticky mucus in the mouth entrance, which is used to mesh the food. Daphnia...

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