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Daphnia studeri is a species of microcrustacean in the genus Daphnia. D. studeri lives in oligotrophic freshwater and slightly brackish lakes in Antarctica and sub-Antarctic islands. Adult Daphnia studeri are typically 1.5 to 2.5 mm (0.059 to 0.098 in) [ 1 ] and colorless or slightly pink.
Daphnia is a genus of small planktonic crustaceans, 0.2–6.0 mm (0.01–0.24 in) in length. Daphnia are members of the order Anomopoda, and are one of the several small aquatic crustaceans commonly called water fleas because their saltatory swimming style resembles the movements of fleas.
Daphnia magna is a key species in many lentic habitats. It can be found in lakes and shallow ponds rich in organic matter sediment. [6] Numerous natural predators are known and can lead to plastic phenotypic responses. In the presence of kairomones, Daphnia spp. develop conspicuous protective structures as an elongated spine and a large body ...
Daphnia pulex. The genus Daphnia (Crustacea: Cladocera: Daphniidae) contains over 200 species of water fleas, many of which are in need of further taxonomic investigation (species inquirendae; marked with asterisks). [1]
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Daphnia lumholtzi is a small crustacean that is 2–3 mm in length. [4] It has a large helmet and a long tailspine, usually longer than the length of its body, [3] that fluctuates in size. [2] [5] Its body structure is arched, extending to a sharp point. [3] There are roughly 10 prominent spines on the margin of the abdominal shield covering. [3]
Daphnia pulicaria have a translucent carapace and two prominent second antennae, which they use to move. [11] The carapace, composed primarily of chitin, helps protect the feeding apparatus, and it is periodically shed during an individual's life. [11] Daphnia have a compound eye, and they are known to have an optomotor response. [12]
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