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ⓘ Asellus aquaticus is a freshwater crustacean resembling a woodlouse. It is known by common names including waterlouse, aquatic sowbug and water hoglouse. ..




Asellus aquaticus
                                     

ⓘ Asellus aquaticus

Asellus aquaticus is a freshwater crustacean resembling a woodlouse. It is known by common names including "waterlouse", "aquatic sowbug" and "water hoglouse".

                                     

1. Ecology

Known as "cress bugs" to anglers, Asellus aquaticus is common throughout the temperate zone including Europe, Russia, and North America. It is found in rivers, streams and standing water particularly where there are plenty of stones under which it hides although not where the water is strongly acidic. It is a detrivore.

Asellus aquaticus is relatively tolerant of a range of pollutants and has been used as an indicator of water quality.

                                     

2. Life Cycle and Reproduction

Asellus aquaticus can breed throughout the year, if the temperature is high enough: they do not breed under cold temperatures. Maturity can be reached in few months under warm summer temperatures, but maturation may take as much as two years in permanently cold water bodies e.g., high-latitude or mountain waters. Life span varies similarly: from 9 months in South Africa to 20 months in Northern Europe. Females carry eggs in brood pouches underneath their body.

                                     

3. Conservation

A number of subspecies are considered to be endangered including:

  • Asellus aquaticus carniolicus, endemic to Slovenia.
  • Asellus aquaticus cyclobranchialis, endemic to Slovenia.
  • Asellus aquaticus cavernicolus found only in Italy and Slovenia.
                                     
  • following species: Asellus alaskensis Bowman Holmquist, 1975 Asellus amamiensis Matsumoto, 1961 Asellus aquaticus Linnaeus, 1758 Asellus balcanicus Karaman
  • British Isles but less frequently recorded than the very similar Asellus aquaticus from which it can be distinguished by the continuous pale band along
  • 1999 early 2000 also documented larvae of Chironomidae flies and Asellus aquaticus crustaceans A few species of beetles and caddisflies, including species
  • non - biting midges while deeper layers contain the freshwater crustacean Asellus aquaticus and larvae of mayflies and Odonatas. Gyraulus crista and Hippeutis
  • habitats in North America and Europe. The family includes these genera: Asellus Geoffroy, 1762 Baicalasellus Stammer, 1932 Bragasellus Henry Magniez
  • will dive to the bottom of the pond to reach Asellus larvae, but only in shallow waters. To reach the Asellus larvae there is an increase in the energy used
  • interstitialis Thermosphaeroma milleri Subspecies Asellus aquaticus carniolicus Asellus aquaticus cyclobranchialis Monolistra racovitzai conopyge Species
  • pill - bug, pill woodlouse, roly - poly, doodle bug, potato bug, carpenter Asellus aquaticus waterlouse, aquatic sowbug, water hoglouse Proasellus meridianus
  • interstitialis Thermosphaeroma milleri Subspecies Asellus aquaticus carniolicus Asellus aquaticus cyclobranchialis Monolistra racovitzai conopyge Species
  • Chironomidae, mostly Phytotendipes gripekoveni comprise 40.2 and Asellus aquaticus 27.6 as well as Corixidae, copepods, Ceratopogonidae, Cladocera
  • Species for which aquatic life is assumed include Typhlotricholigoides aquaticus Mexico and Cantabroniscus primitivus Spain Woodlice are eaten by

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