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Distribution in scandinavian waters
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Maximum length: 0,15 cm. Compare
with the size of a hair.
Appearance: Cladocerans of the Evadne family are transparent
with a slight yellow to grey tone. The two quite complex eyes have grown
together and are large and dark. The second pair of antennae are large
and used for swimming. There are four pairs of legs on the abdomen.
With the different specie of the Evadne family, the head and
pointed carapace are not seperated by a sharp indentation. Compare the
Evadne-species with the cladocerans
of the Podon family and the water
fleas.
Depth: Evadne-species are found from sea-level to a depth
of 2 000 metres, but are probably more common in shallow water.
Environment: Pelagic.
Misc: The Evadne-species eat small organisms and other
particles that they find in the water. In turn, they themselves are
often eaten by larger creatures, for example, fish. Like the water
flea the young can develope without the eggs being fertilized.
Classification: TheEvadne-species is a cladoceran, a crustacean
under the arthropods. In the picture above is a female of the species
Evadne nordmanni. The other species that is often observed in
large quantities in scandinavian waters - Evadne spinifera, has
a much more prominent point.
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