The Adriatic trout or Adriatic salmon (Salmo obtusirostris) is a species of salmonid fish endemic to the rivers of Western Balkans in South-East Europe. The species was first described by Johann Jakob Heckel in 1851. Other common names are softmouth trout and soft muzzled trout. The scientific name has also changed several times through history; synonyms include Thymallus microlepis, Salmothymus obtusirostris and Salar obtusirostris.
Subspecies and distribution
- Salmo obtusirostris oxyrhynchus: Neretva and its tributaries the Buna, the Bregava, the Rama, the Trebižat in Bosnia and Herzegovina and the Vrljika within both Bosnia and Herzegovina and Croatia
- Salmo obtusirostris salonitana: the Jadro River and the Žrnovnica River in Croatia
- Salmo obtusirostris krkensis: the Krka river in Croatia
- Salmo obtusirostris zetensis: the Zeta River and the Morača River in Montenegro.
Appearance and anatomy
The most obvious characteristic of the Adriatic trout is an elongated snout. It also has a small and flashy mouth, relatively large scales and high body depth. Color of the body varies between subspecies, mostly it is green with red and black dots. No vertical stripes that are common in brown trout of the Adriatic Sea drainages can be found.
Adriatic trout are threatened by hybridization with introduced species and overfishing. In the river Neretva, natural hybrids (named kosor by locals) between Adriatic and brown trout can be found. Hybridization was also confirmed experimentally (Kosorić & Vuković. 1969). Adriatic trout prefers rivers with more water and wide riverbed. Adriatic and brown trout have different spawning times that overlap only slightly every few years, which is why natural hybridization is not widespread and both species live sympatrically in the same rivers.
- ^ a b c Crivelli, A.J. (2006). Salmo obtusirostris. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 2009 September 25.
- ^ a b c "Salmo obtusirostris". FishBase. Ed. Ranier Froese and Daniel Pauly. May 2007 version. N.p.: FishBase, 2007.
- ^ a b c d "Softmouth trout". Balkan Trout Restoration Group. http://www.balkan-trout.com/studied_taxa_1_softmouth.htm. Retrieved 2007-05-17.