Salmo obtusirostris

Last updated

Salmo obtusirostris
Softmouth.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Salmo
Species:
S. obtusirostris
Binomial name
Salmo obtusirostris
(Heckel, 1851)
Subspecies

Salmo obtusirostris, also known as the Adriatic trout, [2] Adriatic salmon, [1] and softmouth trout, [3] is a species of salmonid fish endemic to the rivers of Western Balkans in southeastern Europe. The scientific name has changed several times through history; synonyms include Thymallus microlepis, Salmothymus obtusirostris and Salar obtusirostris. [2]

Contents

This species spawns in the early spring and is an obligatory freshwater fish. [3] They are an important game fish. [2]

Distribution and subspecies

Salmo obtusirostris is found naturally in four drainages of the Adriatic Sea, in Croatia, Bosnia and Herzegovina and Montenegro: the Neretva-Vrljika system, the Jadro, the Morača-Zeta system, and possibly the Krka river drainage around Knin although it is presumed extinct for some time now. [2] [3]

In addition, sometimes during 1960's, it has been introduced from the Jadro river to the nearby Žrnovnica river, both being small karst, single river drainages, of very short course, in vicinity of Split. [2]

Although the Vrljika belongs to the Neretva River drainage it's a sinking river, divided in several on surface and underground segments, hence separated from the Neretva River in significant manner regarding softmouth trout populations. However, the Vrljika softmouth trout is apparently most similar to the Neretva's subspecies, while some autapomorphies exist in the Vrljika population. The Vrljika softmouth trout appears to have originated from a vicariance that split a common ancestral population into large (Neretva) and small (Vrljika) fragmented populations. [4]

The different populations are sometimes classified into subspecies: [3]

Appearance and anatomy

The most obvious characteristic of the Adriatic trout is an elongated snout. It also has a small and fleshy mouth, relatively large scales and high body depth. [3] The color of the body varies between subspecies, it is mostly green with red and black dots. There are no vertical stripes that are common in brown trout of the Adriatic Sea drainages that can be found.[ citation needed ]

Conservation

Adriatic trout are threatened by excessive damming, hybridization with introduced species and overfishing. [1] 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).[ full citation needed ] 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.[ citation needed ]

Related Research Articles

<span class="mw-page-title-main">Dinaric Alps</span> Mountain range in the Balkan Peninsula of Southeastern Europe

The Dinaric Alps, also Dinarides, are a mountain range in Southern and Southcentral Europe, separating the continental Balkan Peninsula from the Adriatic Sea. They stretch from Italy in the northwest through Slovenia, Croatia, Bosnia and Herzegovina, Serbia, Montenegro, and Kosovo to Albania in the southeast.

<span class="mw-page-title-main">Neretva</span> River in Bosnia and Herzegovina and Croatia

The Neretva, also known as Narenta, is one of the largest rivers of the eastern part of the Adriatic basin. Four hydroelectric power plants with large dams provide flood protection, power and water storage. It is recognized for its natural environment and diverse landscapes.

<i>Salmo</i> Genus of fishes

Salmo is a genus of ray-finned fish from the subfamily Salmoninae of family Salmonidae, and is part of the tribe Salmonini along with the sister genera Salvelinus and Salvethymus. Almost all Salmo species are native only in the Old World, the only exception being the Atlantic salmon, which is also naturally found across the North Atlantic in eastern North America.

Salmo obtusirostris salonitana is an endemic trout subspecies found in the Jadro River in the vicinity of Solin, and in the nearby Žrnovnica River, where it was introduced in 1964. The upper reaches of the Jadro River including Jadro Spring, covering an area of 7.8 hectares, have been protected as an ichthyological reserve since 1984, for the purpose of preserving this endangered fish species, S. o. salonitana.

Cobitis narentana is a species of ray-finned fish in the true loach family (Cobitidae). It is found in Bosnia and Herzegovina and Croatia. This fish was long believed to be part of the widespread Spined Loach.

<span class="mw-page-title-main">Jablaničko lake</span> Reservoir in North Herzegovina

Jablaničko lake is a large artificially formed lake on the Neretva river, right below Konjic where the Neretva expands into a wide valley. The river provided lot of fertile, agricultural land there, before the lake flooded most of it. The lake was created in 1953 after construction of Jablanica Dam near Jablanica in central Bosnia and Herzegovina.

Salmo ohridanus, also known by the local name as the belvica in North Macedonia or belushka in Albania, is a species of freshwater salmonid fish, endemic to Lake Ohrid in Albania and North Macedonia.

<i>Salmo dentex</i> Species of fish

Salmo dentex is a variety of trout, a freshwater fish in the family Salmonidae, found in the western Balkans. Until recently the identity, biological distinctness and species status of the dentex trout were not properly clarified, but genetic data now suggest it is not a monophyletic unit that could be distinguished from other salmonids as a separate species.

<i>Salmo marmoratus</i> Species of fish

Salmo marmoratus, the marble trout, is a species of freshwater fish in the family Salmonidae. It is characterized by a distinctive marbled color pattern and high growth capacity. The marble trout is found in only a handful of drainages and rivers of the Adriatic basin in Italy, Slovenia, Croatia, Bosnia and Herzegovina, and Montenegro, while in Albania, the species is considered most likely extirpated.

<span class="mw-page-title-main">Jadro</span> River in Croatia

The Jadro is a watercourse in Dalmatia, Croatia, that discharges into the Adriatic Sea. The upper reaches of the Jadro River, as well as its source, Jadro Spring, are protected as an ichthyological nature reserve, partly due to the presence of an endemic species of soft-mouthed trout. The headwaters of the Jadro River were the original water supply for the ancient city comprised by Diocletian's Palace. Contemporary studies indicate favourable water quality levels of the river near the headwaters at Jadro Spring.

<span class="mw-page-title-main">Konjic</span> City in Federation of Bosnia and Herzegovina, Bosnia and Herzegovina

Konjic is a city and municipality located in the Herzegovina-Neretva Canton of the Federation of Bosnia and Herzegovina, one of two entities that make up Bosnia and Herzegovina. It is located in northern Herzegovina, around 60 kilometres (37 mi) southwest of Sarajevo, in a mountainous, heavily wooded area, and is 268 m (879 ft) above sea level. The municipality extends on both sides of the Neretva River. According to the 2013 census, the city of Konjic has a population of 10,732 inhabitants, whereas the municipality has 25,148.

<span class="mw-page-title-main">Herzegovina</span> Historical region in the Balkans

Herzegovina is the southern and smaller of two main geographical regions of Bosnia and Herzegovina, the other being Bosnia. It has never had strictly defined geographical, cultural or historical borders, nor has it ever been defined as an administrative whole in the geopolitical and economic subdivision of Bosnia and Herzegovina.

<span class="mw-page-title-main">Rakitnica</span> River in Bosnia and Herzegovina

Rakitnica is the main tributary of the first section of the Neretva river, also called Upper Neretva (Bosnian: Gornja Neretva). It meets Neretva from the right, flowing from north to south, between Bjelašnica and Visočica mountains.

<span class="mw-page-title-main">Trebižat (river)</span> River in Čapljina, Bosnia and Herzegovina

The Trebižat is a river in the southern part of Bosnia and Herzegovina, and major right tributary of the Neretva River.

<span class="mw-page-title-main">Glavatičevo</span> Village in Federation of Bosnia and Herzegovina, Bosnia and Herzegovina

Glavatičevo is a small village in Konjic Municipality, Bosnia and Herzegovina, which is a central village to a group of villages of a wider Glavatičevo, positioned 30 km southeast of Konjic, within a wide Župa Valley straddling the Neretva river. The village and its wider areal, with surrounding villages and the valley, is also referred to as Župa Glavatičevo, or Komska Župa, or simply Župa (transl. parish).

<span class="mw-page-title-main">Upper Neretva</span> Region around the upper course of the Neretva river in Bosnia and Herzegovina

Upper Neretva, is the upper course of the Neretva river, including vast mountainous area surrounding the Neretva, with numerous human settlements, peaks and forests, numerous streams and well-springs, three major glacial lakes near the river and even more scattered across the mountains of Treskavica and Zelengora, in a wider area of the Upper Neretva with its flora and fauna.

The fish fauna of the Neretva river basin in the western Balkans is representative of the Dinaric karst region and characterized by several endemic and endangered species.

<span class="mw-page-title-main">Vrljika (river)</span> River in Croatia, Bosnia and Herzegovina

The Vrljika is short sinking river in Croatia and Bosnia and Herzegovina, belonging to Neretva River basin. Its source is located on the outskirts of village Proložac near town of Imotski, Croatia. The Vrljika River is home of endangered endemic Softmouth trout, also known as Adriatic trout.

<span class="mw-page-title-main">Žrnovnica (river)</span> River in Croatia

Žrnovnica is a river in Croatia that springs at the foot of the Mosor, near Dvori village, in Split municipality, and in its short course flows through Žrnovnica and Podstrana settlements, in the wider area of city of Split, in the Split-Dalmatia County. The total length of the river is 4,800 meters. Its basin is a direct Adriatic Sea watershed.

<i>Salmo farioides</i> Species of fish

Salmo farioides, commonly known as the West Balkan trout, the Adriatic brown trout, or the Balkan brook trout, is a species of ray-finned fish found in the Balkans, including Albania, Croatia, North Macedonia, among others. It is an important fish in numerous rivers and lakes throughout the region. Identification of Salmo farioides is difficult due to the high degree of endemism in the western Adriatic and Mediterranean area, particularly among salmonid species, and because of high phenotypic diversity among trout populations specifically.

References

  1. 1 2 3 Crivelli, A.J. (2006). "Salmo obtusirostris". IUCN Red List of Threatened Species . 2006: e.T19862A9056634. doi: 10.2305/IUCN.UK.2006.RLTS.T19862A9056634.en . Retrieved 19 November 2021.
  2. 1 2 3 4 5 Froese, Rainer; Pauly, Daniel (eds.) (2007). "Salmo obtusirostris" in FishBase . May 2007 version.
  3. 1 2 3 4 5 "Softmouth trout". Balkan Trout Restoration Group. Retrieved 19 February 2011.
  4. "Softmouth trout from the River Vrljika – Salmo obtusirostris ssp". balkan-trout.com. Balkan Trout Restoration Group. Retrieved 3 April 2015.
  5. Weiss et al. 2018, pp. 118–123.
  6. Weiss et al. 2018, pp. 105, 112.
  7. Weiss et al. 2018, p. 112.
  8. Weiss et al. 2018, pp. 124–129.

Bibliography