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Salmo dentex : ウィキペディア英語版
Salmo dentex

''Salmo dentex'' is a variety of trout, a freshwater fish in the Salmonidae family, found in the western Balkans.〔Freyhof, J. & Kottelat, M. 2008. (Salmo dentex ) In: IUCN Red List of Threatened Species. Version 2010.1. Downloaded on 21 May 2010〕 Until recently the identity, biological distinctness and species status of the dentex trout were not properly clarified,〔(【引用サイトリンク】url=http://www.balkan-trout.com/studied_taxa_6_dentex.htm )〕 but genetic data now suggest it is not a monophyletic unit that could be distinguished from other salmonids as a separate species.〔
''Salmo dentex'' has been reported to inhabit the Neretva river and Hutovo Blato wetlands in Bosnia and Herzegovina, and is also found in Albania and Montenegro in Lake Skadar and its tributaries. It is reported that ''S. dentex'' is extinct from Croatian rivers, Cetina and Krka, but has recently bee reported by anglers from the Cetina river in Croatia. Some reports indicate its presence in the rivers of Livanjsko field in Bosnia and Herzegovina and in river Alfeios in Greece.
The status of ''S. dentex'', locally known as the zubatak, long remained unclear due to lack of samples for detailed analyses, hybridisation with other trout lineages and diverse and multiple designations of the same trout in different areas. One of the inhabited areas, the Hutovo Blato wetlands, is situated North West of the Neretva river estuary in southern part of Bosnia and Herzegovina. This is an atypical type of wetland, characterized by several shallow lakes and channels filled with clear and cold water (around 13°C whole year) creating conditions suitable also for salmonids.〔
Recently the genetic structure of ''S. dentex'' and its relations to other co-existing salmonids in the Neretva and Skadar river systems have been sudied using mitochondrial DNA, microsatellite and 21 other nuclear DNA loci. Genetic analyses showed that the Neretva ''S. dentex'' ("zubatak") and the co-existing marble trout (''S. marmoratus'') formed a genetically unified cluster, while Skadar ''S. dentex'' ("strun") was "genetically distinct from ''S. marmoratus'' in the same river system and indistinct from local brown trout (''S. trutta'')". Thus the Neretva and Skadar ''S. dentex'' are not closely related but rather "''S. dentex'' () a particular life history form of ''S. marmoratus'' in the Neretva basin and of ''S. trutta'' in the Skadar basin". "These results clearly demonstrate that ''S. dentex'' does not represent a monophyletic lineage and should not be considered a distinct species."〔
==References==



抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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