Squalius carolitertii, the Northern Iberian chub,[2] is a species of freshwater ray-finned fish belonging to the familyLeuciscidae, which includes the daces, Eurasian minnows and related fishes. It is found in Portugal and Spain, and known there as the bordallo, escalo or gallego.[3]
Squalius carolitertii belongs to the genus Squalius, this name was proposed by the French bioogist Charles Lucien Bonaparte in 1837 for a subgenus of the genus Leuciscus for the Italian chub (Squalius cephalus), inserting and additional "i" to prevent homonymy with the spurdog genus Squalus. In classical Latin the chub and the spurdog were homonyms as squalus. An alternative explanation was that the name is a latinisation of squaglio, a vernacular name for the Italian chub in Rome and its environs. The specific name, carolitertii, is a latinisation of Carlos III, the King of Spain who founded the Museo Nacional de Ciencias Naturales in Madrid, where Doadrio worked and the holotype was deposited.[6]
Distribution
Squalius carolitertii is a small endemic leusciscid inhabiting the rivers of the Iberian Peninsula across a large area, including the Douro, Mondego, Lima, Minho, and Lérez basins.[7] Recently several researchers have reported this species for the first time from the upper reaches of the Alberche River (a tributary of the Tagus basin in central Spain) and in the Oitavén River (a tributary of the Verdugo River in northwestern Spain).[8]
Diet
S. carolitertii is an omnivorous fish feeding predominantly on aquatic invertebrates, being nymphs of Baetis spp. The most abundant prey, although detritus, is an important food item.[9] Moreover, in S. carolitertii, as in many other fish species, there is normally a change in the diet composition during the life of the fish, and these age-related diet shifts occur at three different levels: (1) frequency of occurrence of detritus decreases with fish age; (2) prey selection varies with fish age; and (3) mean prey size increases as fish size increased.[10]
↑ Doadrio I., ed. (2001). Atlas y libro rojo de los peces continentales de España. Ministerio de Medio Ambiente y Consejo Superior de Investigaciones Científicas, Madrid.
↑ Perea S.; Garzón P.; González J.L.; Almada V.C.; Pereira A.; Doadrio I. (2011). "New distribution data on Spanish autochthonous species of freshwater fish". Graellsia. 67 (1): 91–102.
↑ Sánchez-Hernández J. & Cobo F. (2011). "Summer food resource partitioning between four sympatric fish species in Central Spain (River Tormes)". Folia Zoologica. 60 (3): 189–202.
↑ Sánchez-Hernández J. & Cobo F. (2012). "Ontogenetic dietary shifts and food selection of endemic Squalius carolitertii (Actinopterygii: Cypriniformes: Cyprinidae) in River Tormes, Central Spain, in summer". Acta Ichthyologica et Piscatoria. 42 (2): 101–111.
Further reading
"Reading the history of a hybrid fish complex from its molecular record". Molecular Phylogenetics and Evolution. 45 (3): 981–996. December 2007. doi:10.1016/j.ympev.2007.05.011. hdl:10400.12/1432.</ref>
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