Scheldegroppe
| Scheldegroppe | ||||||||||||
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Scheldtegroppe ( Cottus perifretum ) |
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| Scientific name | ||||||||||||
| Cottus perifretum | ||||||||||||
| Freyhof , Kottelat & Nolte , 2005 |
The Scheldtegroppe ( Cottus perifretum ) is a small, only ten centimeters long freshwater fish . It occurs in Great Britain , in the French and Belgian Scheldt , in the Rhine south to Karlsruhe , in the Moselle , in the Sieg , in the lower Loire and the lower Garonne .
features
Cottus perifretum becomes ten centimeters long. Cottus perifretum differs from other Cottus species in north-western Europe in that it lacks a transverse ligament in the pelvic fins and extends the body spines down to the caudal fin stalk in juveniles and most adults . However, it is sometimes absent in large males. The eye diameter is 18 to 21% of the head length. The dorsal fin is black or marbled in males ready to mate. The anal fin is supported by 11 to 13 rays . Its last fin ray is connected to the body by a membrane over almost its entire length.
Way of life
Cottus perifretum inhabits all types of flowing and stony waters, including large rivers. The scheldtegroppe feeds on small, bottom-dwelling invertebrates.
See also
literature
- Jörg Freyhof , Maurice Kottelat & Arne Nolte: Taxonomic diversity of European Cottus with description of eight new species (Teleostei: Cottidae). Ichthyol. Explor. Freshwaters, Volume 16, No. 2, June 2005 © by Verlag Dr. Friedrich Pfeil, Munich, Germany - ISSN 0936-9902
Web links
- Scheldegroppe on Fishbase.org (English)
- Cottus perifretum inthe IUCN 2013 Red List of Threatened Species . Posted by: Freyhof, J. & Kottelat, M., 2008. Retrieved January 27, 2014.