Daphnia magna is a small planktonic crustacean (adult length 1.5–5.0 mm) that belongs to the subclass Phyllopoda.It inhabits a variety of freshwater environments, ranging from acidic swamps to rivers made of snow runoff, and is broadly distributed throughout the Northern Hemisphere and South Africa.. The species has been subject of biological research since the 18th century.
Daphnia species have been studied extensively because of their importance to aquatic ecosystems, and they show a striking ability to contend with environmental challenges. The availability of the D. pulex genome should now be able to provide insights into the adaptation to specific environmental conditions, from the ecological to the genetic level.
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Background information on Daphnia Part 1 - Physical description Daphnia, commonly called water fleas, are a freshwater zooplankton found in ponds and lakes all over the world. Daphnia received the name water flea due to their jerky swimming motions.
Working with Daphnia Daphnia magna and other cladocerans are of great importance in the aquatic food chain. They are a food sta-ple for young and adult fish; stomach contents of a variety of fish can contain up to 95% cladocerans. Hydra and both immature and mature insects also eat Daphnia.
Why are Daphnia magna important? They serve as an important source of food for fish and other aquatic organisms. Daphnia are excellent organisms to use in bioassays because they are sensitive to changes in water chemistry and are simple and inexpensive to raise in an aquarium.
Why Daphnia? Daphnia, popularly known as water fleas, are small crustaceans that live in fresh water such as ponds, lakes, and streams.They serve as an important source of food for fish and other aquatic organisms. Daphnia are excellent organisms to use in bioassays because they are sensitive to changes in water chemistry and are simple and inexpensive to raise in an aquarium.
Daphnia as an emerging model for toxicological genomics Joseph R. Shaw1,, Michael E. Pfrender2, Brian D. Eads3, ... ecologically important (Carpenter et al., 1987) as they are often the ... who deﬁned the range of sodium chloride tolerated by Daphnia magna (Straus). These studies were not only the ﬁrst to quantitatively
Daphnia is a large genus – comprising over 200 species – belonging to the cladoceran family Daphniidae. It is subdivided into several subgenera (Daphnia, Australodaphnia, Ctenodaphnia), but the division has been controversial and is still in development.Each subgenus has been further divided into a number of species complexes.The understanding of species boundaries has been hindered by ...
Daphnia are also known to migrate toward or away from the banks of ponds or lakes. Again, the most likely explanation for this behavior is predator avoidance. Certain species of Daphnia, e.g., D. magna, can be observed clinging occasionally to plants or other substrate. Furthermore, they may browse over the surface substrates to pick up small ...