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Diagnostic Description

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Mouth subterminal, snout rounded; head length about equal to maximum body depth; infraorbitals 4 and 5 expanded; communication preopercular-mandibular and infraorbital canals present; supraethmoid narrow and short (Ref. 28035). Diagnosed from its congeners in Iberian Peninsula by the following characters: scales on lateral line 39-44 + 2-3; 3-4½ scale rows between lateral line and pelvic fin origin; infraorbital bones narrow, width of infraorbitals 2 and 5 about 2 times width of sensory canal on same bones; snout rounded, mouth subterminal; and head length about equal to body depth (Ref. 59043).
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Recorder
Armi G. Torres
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Life Cycle

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Interspecific hybridization occurs between males of L. carolitertii and females of L. alburnoides.
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Rainer Froese
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Morphology

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Dorsal spines (total): 3; Dorsal soft rays (total): 7 - 9; Analspines: 3; Analsoft rays: 6 - 9; Vertebrae: 39 - 41
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Biology

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Inhabits from hill streams to middle stretches of rivers (Ref. 59043). Occurs in rivers on the low plains and at high attitudes. Can withstand low levels of oxygen during summer. Juveniles are omnivorous whereas adults feed on arthropods and other animals (Ref. 35754). Reported to feed on fry of other fish species. Involved in the Iberocypris alburnoides hybrid complex (Ref. 59043). Threatened due to habitat destruction, pollution and the introduction of other species (Ref. 26100).
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Importance

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fisheries: of no interest
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Squalius carolitertii

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Squalius carolitertii is a species of fresh-water fish in the family Cyprinidae. It is found in Portugal and Spain, and known there as the bordallo, escalo or gallego.

Its natural habitats are rivers and intermittent rivers. It is not considered threatened by the IUCN.

Distribution

The Northern Iberian chub, Squalius carolitertii is a small endemic cyprinid inhabiting the rivers of the Iberian Peninsula across a large area, including the Douro, Mondego, Lima, Minho, and Lérez basins.[2] 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).[3]

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.[4] 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.[5]

References

  1. ^ Crivelli, A.J. (2006). "Squalius carolitertii". IUCN Red List of Threatened Species. 2006: e.T61261A12455457. doi:10.2305/IUCN.UK.2006.RLTS.T61261A12455457.en. Retrieved 14 November 2021.
  2. ^ 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.
  3. ^ 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.{{cite journal}}: CS1 maint: uses authors parameter (link)
  4. ^ 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.
  5. ^ 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.
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Squalius carolitertii: Brief Summary

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Squalius carolitertii is a species of fresh-water fish in the family Cyprinidae. It is found in Portugal and Spain, and known there as the bordallo, escalo or gallego.

Its natural habitats are rivers and intermittent rivers. It is not considered threatened by the IUCN.

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