Gjørs

Gjørs is the common Norwegian name for the gudgeon, a small freshwater fish in the carp family (Cyprinidae). The species most often associated with this name is Gobio gobio, known in English as the common gudgeon. It is a slender, bottom-dwelling fish found in many rivers and lakes across Europe and parts of western Asia.

Distribution and habitat

Gjørs is native to a wide range of European waters, where it favors slow-moving or still habitats with abundant vegetation and soft, silted bottoms. In Norway, it occurs mainly in southern rivers and some larger bodies of water. It typically inhabits shallow zones where it can feed along the substrate.

Description

Gjørs is small, usually reaching about 6–12 centimeters in length, occasionally longer. It has a streamlined body, a bronze-brown back, and a lighter belly. A subterminal mouth with small barbels helps it locate food along the bottom. The coloration provides camouflage against vegetation and sediment.

Biology and ecology

The gudgeon feeds on a mix of small invertebrates, insect larvae, crustaceans, and plant matter. Spawning occurs in spring to early summer, with eggs laid on submerged vegetation or debris and adhering to surfaces. Juveniles hatch and mature in freshwater habitats, contributing to the biodiversity of their ecosystems.

Human use and conservation

Gjørs is not a major target of commercial fisheries and is of limited importance for recreation. It can serve as forage for larger fishes and plays a role in the food web of freshwater systems. Globally, Gobio gobio is listed as Least Concern by the IUCN, though local populations can be affected by water quality and habitat alteration.