''Alburnus arborella'', the alborella or Italian bleak, is a species of freshwater fish in the family

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. minnows and related fishes This fish is found in northern Italy, Switzerland, San Marino, Slovenia and Croatia.

Taxonomy

''Alburnus arborella'' was first formally described as ''Aspius arborella'' in 1841 by the French

biologist A biologist is a scientist who conducts research in biology. Biologists are interested in studying life on Earth, whether it is an individual Cell (biology), cell, a multicellular organism, or a Community (ecology), community of Biological inter ...

and

art collector A private collection is a privately owned collection of works (usually artworks) or valuable items. In a museum or art gallery context, the term signifies that a certain work is not owned by that institution, but is on loan from an individual ...

Charles Lucien Bonaparte Charles Lucien Jules Laurent Bonaparte, 2nd Prince of Canino and Musignano (24 May 1803 – 29 July 1857) was a French naturalist and ornithology, ornithologist, and a nephew of Napoleon. Lucien and his wife had twelve children, including Cardinal ...

with its type locality given as the lakes of northern Italy. This taxon has been regarded as a subspecies of the

common bleak The bleak or common bleak (''Alburnus alburnus'') is a small freshwater coarse fish of the family Leuciscidae, which includes the minnows, daces and bleaks. The common bleak is found in Europe and Western Asia. Description The body of the ...

(''A. alburnus'') but is now regarded as a valid species. The genus ''

Alburnus ''Alburnus'' is a genus of fish in the family Leuciscidae, the daces and minnows. They are known commonly as bleaks. A group of species in the genus is known as shemayas. The genus occurs in the western Palearctic realm, and the center of diversi ...

'' is classified 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 Leuciscidae.

Etymology

''Alburnus arborella'' belongs to the genus ''Alburnus'' a name derived from the

Latin Latin ( or ) is a classical language belonging to the Italic languages, Italic branch of the Indo-European languages. Latin was originally spoken by the Latins (Italic tribe), Latins in Latium (now known as Lazio), the lower Tiber area aroun ...

for whitefish but it also refers to the bleak, a name which means pale in English, in reference to the pale non lustrous colour of ''A. alburnus''. 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 ...

, ''arborella'', is thought to be a misspelling of ''alborella'', the

Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...

common name for this fish.

Description

''Alburnus arborella'' is distinguished from related species around the

Adriatic Sea The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkans, Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Se ...

by having the origin of 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 ...

immediately to the underneath the 4th to 8th branched

dorsal fin A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found ...

rays. The anal fin has between 13 and . The ventral keel is exposed and is partially or completely scaled. In life there is a faint stripe along the

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 ...

and this becomes more distinct in preserved specimens. The

pectoral fin Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish aquatic locomotion, swim. Apart from the tail or caudal fin, fish fins have no direct connection with the vertebral column ...

does not extend as far as the base of the

pelvic fin Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hi ...

. The mouth is upward pointing. This species has a maximum

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 ...

is .

Distribution and habitat

''Alburnus arborella'' 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 rivers which drain into the northern part of the

from the

Chienti The Chienti is a river in the Marche region of Italy. Its source is near Serravalle di Chienti in the Appennino Umbro-Marchigiano mountains in the province of Macerata. The river flows northeast through the mountains past Muccia and enters and ...

drainage basin in

Marche Marche ( ; ), in English sometimes referred to as the Marches ( ) from the Italian name of the region (Le Marche), is one of the Regions of Italy, twenty regions of Italy. The region is located in the Central Italy, central area of the country, ...

Istria Istria ( ; Croatian language, Croatian and Slovene language, Slovene: ; Italian language, Italian and Venetian language, Venetian: ; ; Istro-Romanian language, Istro-Romanian: ; ; ) is the largest peninsula within the Adriatic Sea. Located at th ...

, there is an isolated population in the

Zrmanja Zrmanja (, ) is a river in southern Lika and northern Dalmatia, Croatia. It is long and its basin covers an area of . It was known to the ancient Romans as ''Tedanius''. The spring of Zrmanja is located in southern part of Lika under Postak - th ...

bain in Croatia. This fish has been introduced other parts of Italy, including northern Sardinia, and Croatia. The alborella can be found in a wide range of aquatic habitats from large subalpine lakes to lowland rivers and small streams. It is also found in anthropogenic habitats such as reservoirs and canalised rivers.

References

{{Authority control arborella Fish described in 1841 Taxa named by Charles Lucien Bonaparte