''Leucos basak'', the Albanian roach, Dalmatian roach or Croatian roach, is a species of is a species of freshwater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Leuciscidae Leuciscidae is a family of freshwater ray-finned fishes, formerly classified as a subfamily of the Cyprinidae, which contains the true minnows. Members of the Old World (OW) clade of minnows within this subfamily are known as European minnow ...

, which includes teh daces, Eurasian minnow and related fishes. It is found in the

Balkan Peninsula The Balkans ( , ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. The region takes its name from the Balkan Mountains that stretch throug ...

where its natural

habitat In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...

s are intermittent rivers and freshwater lakes.

Taxonomy

''Leucos basak'' was first formally described in 1843 by the Austrian

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Johann Jakob Heckel Johann Jakob Heckel (23 January 1790 – 1 March 1857) was an Austrian taxidermist, zoology, zoologist, and ichthyology, ichthyologist from Mannheim in the Electoral Palatinate. He worked at the Royal natural history cabinet in Vienna which later ...

with its type locality given as Croatia. It is a species in the genus ''

Leucos ''Leucos'' is a genus of fishes in the family Leuciscidae, from Southern Europe. They are a taxon which is closely related to the genus ''Rutilus ''Rutilus'', commonly known as roaches, is a genus of freshwater ray-finned fish belonging to ...

'' within the

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

Leuciscinae Leuciscinae is a subfamily of freshwater Actinopterygii, ray-finned fishes belonging to the Family (biology), family Leuciscidae, which includes the fishes known as daces, chubs, shiners and minnows. The fishes in this subfamily are mainly found i ...

of the family

Etymology

''Leucos basak'' belongs to the genus ''

'', this name is derived from the Greek ''leukos'' which means "white", the genus was named by

and he did not explain why he chose this name, it may be that it refers to the silvery colour of '' Squalius aula''. The

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

, ''basak'', which is the Croatian common name for this species.

Description

''Leucos basak'' has its

dorsal Dorsal (from Latin ''dorsum'' ‘back’) may refer to: * Dorsal (anatomy), an anatomical term of location referring to the back or upper side of an organism or parts of an organism * Dorsal, positioned on top of an aircraft's fuselage The fus ...

and

anal fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported o ...

s each supported by 11 soft rays. It can be distinguished from the other species in the genus ''Leucos'' by its moderate size, typically having a

standard length Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is ...

between , the absence of a mid-lateral band; the body is plain silvery in life, the peritoneal membraneis black and there are normally 36-38 pored scales on lateral line, less than the other ''Leucos '' species. This species has a maximum published

total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ...

Distribution and habitat

''Leucos basak'' is endemic to the western Balkans. Here it is found from the

Neretva River The Neretva (, sr-Cyrl, Неретва), 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 (higher than 15 metres) provide flood protection, electri ...

in Bosnia and Herzegovina and Croatia south to the Bojana in Montenegro and Albania, including the

Lake Skadar Lake Skadar or Lake Scutari (, ; cnr-Cyrl-Latn, Скадарско језеро, Skadarsko jezero, )also called Lake Shkodra (and ''Lake Shkodër'')lies on the border of Albania and Montenegro, and is the largest lake in Southern Europe. It is n ...

Lake Ohrid Lake Ohrid is a lake which straddles the mountainous border between the southwestern part of North Macedonia and eastern Albania. It is one of Europe's deepest and oldest lakes, with a unique aquatic ecosystem of worldwide importance, with more th ...

and

Prespa Prespa (, , ) is a region shared between North Macedonia, Greece and Albania. It shares the same name with the two Prespa lakes which are situated in the middle of the region. The largest town is Resen in North Macedonia with 9,000 inhabitan ...

basins. The Albiania roach is found in shallow, sreaches of karstic streams with slow currents and rivers, Oligotrophic lakes, backwaters and reservoirs with abundant vegetation.

References

{{Taxonbar, from=Q2236235 Freshwater fish of Europe Leucos, basak Fish described in 1843 Endemic fish of the Neretva basin