Mud shrimps

Several litters and fast growing young

The female carries the eggs on the underside of her nether regions and mud shrimps are almost 1 mm long when they hatch. They stay in their nursery until they have sloughed their exoskeleton for the first time. After about 2 weeks they have developed enough to leave their mothers burrow to dig their own. Mud shrimps can increase in numbers very rapidly because they are able to have several litters during the same summer, and the young from the first litter are able to reproduce that same summer. Populations can in this way reach a density of 70 000 individuals per m2.

Fishfood and aviation fuel

Because mud shrimps can appear in such quantities they are an important source of food for the common shrimp, shore crab, fish and birds.
    Most mud shrimps live only one summer, but a few individuals can hibernate during the winter and thereafter build new populations the following summer.

There are several specie of mud shrimps

Corophium volutator has been the most studied and probably the most noticable of the 6 sea-living specie within the phylum that have been found in southern scandinavia. In addition there are 3 freshwater specie known in the river systems of Finland and those that merge into the southern Baltic and North Sea. These specie are also found in brackish water and it is very likely that at least some of these specie are found in Swedish estural areas.
    To distinguish between the different specie, the legs and antennae need to be magnified and studied closely.

Bo Johannesson

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Digs skillfully

Decorates with detrious

Several litters

Fishfood and aviation fuel

More specie

Mud shrimp     More facts     Other names
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Bo Johannesson | Martin Larsvik | Lars-Ove Loo | Helena Samuelsson