''Scardinius graecus'', the Greek rudd or Yliki rudd, is a

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

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 the daces, Eurasian minnows and related fishes. This species is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

to Central Greece.

Taxonomy

''Scardinius graecus'' was first formally described in 1937 by the Greek

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 ...

Alexander I. Stephanidis with its type locality given as

Lake Yliki Lake Yliki ( ''Yliki'', Ancient Greek: Ὑλίκη ''Hylike'', Latinised as ''Hylica'') is a large natural lake of Boeotia, central Greece. Situated 8 km north of Thebes at 78 m elevation, it has been an important source of drinking water for the ...

near Thebes in Greece. This species belongs to the genus ''

Scardinius ''Scardinius'' is a genus of freshwater ray-finned fishes belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. The fishes in this genus are commonly called rudds. Locally, the name "rudd" without ...

'', commonly referred to as rudds, which belongs to 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 Leuciscidae.

Etymology

''Scardinius graecus'' belongs to the genus ''Scardinius'' and this name is thought to be a latinisation of ''scardafa'', a

vernacular name Vernacular is the ordinary, informal, spoken form of language, particularly when perceived as having lower social status or less prestige than standard language, which is more codified, institutionally promoted, literary, or formal. More n ...

in Italy, Rome in particulat, for the Tiber rudd ('' Scardinius scardafa''). 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 ...

, ''graecus'', means "Greece", the country this fish is endemic to.

Description

''Scardinius graecus'' may de told apart from other

Balkan 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 ...

rudd species by having between 38 and 43 scales along its

lateral line The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelia ...

; the

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 ...

typically has branched fin rays; there are between 14 and 18 pectoral fin rays; 17 to 24

gill rakers Gill rakers in fish are bony or cartilaginous processes that project from the branchial arch (gill arch) and are involved with suspension feeding tiny prey. They are not to be confused with the gill filaments that compose the fleshy part of the ...

; the dorsal profile of the head is clearly concave, the snout with its tip level with the centre of the eye; the eye is close to the dorsal profile of the head in lateral view; the articulation of lower jaw is in below or behind of the middle of the eye; and the length of the head is equivalent to 24 to 35% of the standard length. The Greek rudd has a maximum

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 ...

of , although is more typical.

Distribution and habitat

''Scardinius graecus'' is endemic to

Boeotia Boeotia ( ), sometimes Latinisation of names, Latinized as Boiotia or Beotia (; modern Greek, modern: ; ancient Greek, ancient: ), is one of the regional units of Greece. It is part of the modern regions of Greece, region of Central Greece (adm ...

in central Greece, being a remnant of the fish fauna that was found in

Lake Copais Lake Copais, also spelled Kopais or Kopaida (; ), was a lake in the centre of Boeotia, Greece, west of Thebes. It was first drained in the Bronze Age, and drained again in the late 19th century. It is now flat dry land and is still known as Kop ...

which was drained in the 19th Century. Their modern distribution is in the drainage system of the

Cephissus (Boeotia) The Cephissus (), called the Boeotian Cephissus to distinguish it from other rivers of the same name, or Kifisos () is a river in central Greece. Its drainage basin is . The river rises at Lilaia in Phocis, on the northwestern slope of Mount P ...

River including Lakes Yliki and

Paralimni Paralimni () is a town within the Famagusta District of Cyprus, situated on the island's east coast. Since the Turkish invasion in 1974, it has increased in size and status, primarily due to the migration of refugees fleeing from the north. Ma ...

. It has also been introduced in to the reservoirs at Beletsi and

Marathon The marathon is a long-distance foot race with a distance of kilometres ( 26 mi 385 yd), usually run as a road race, but the distance can be covered on trail routes. The marathon can be completed by running or with a run/walk strategy. There ...

. In lakes the Greek rudd is mainly found in the

pelagic zone The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the sur ...

Conservation

''Scardinius graecus'' is classified as

Endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

by the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

. The threats to this species include water abstraction, pollution and climate change.

References

Sources

* {{Taxonbar, from=Q527051

graecus __NOTOC__ In Greek mythology, Graecus (; ) was the son of Zeus and Pandora, daughter of Deucalion, and the eponym of the Graecians. According to the Byzantine author John the Lydian (c. AD 490 – 565), Hesiod, in his ''Catalogue of Women'', stat ...

Fish described in 1937 Taxonomy articles created by Polbot Taxa named by Alexander I. Stephanidis Habitats Directive species Endemic fauna of Greece