Pseudochondrostoma polylepis  (Steindachner, 1864)

Iberian nase
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Pseudochondrostoma polylepis
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Leuciscinae
Etymology: Pseudochondrostoma: Name refers to its morphological similarity with the genus Chondrostoma as a consequence of homoplasy in multiple traits..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic.   Temperate; 41°N - 36°N, 10°W - 2°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Europe: Tagus drainage in Spain and Portugal; Vouga, Modego, Algoa and Sado drainages in Portugal. Introduced in Jucar and Segura drainages in Spain. In Appendix III of the Bern Convention (protected fauna).

Length at first maturity / Size / Weight / Age

Maturity: Lm 9.0  range ? - ? cm
Max length : 40.0 cm SL male/unsexed; (Ref. 59043)

Short description Morphology | Morphometrics

Diagnosed from its congeners by having the following characters: lower jaw edge straight; 61-75 + 3-4 scales on lateral line; anal fin usually with 9½ branched rays; 22-31 gill rakers; usually 6-5 pharyngeal teeth; and caudal peduncle depth 1.8-2.2 times in its length (Ref. 59043).

Biology     Glossary (e.g. epibenthic)

Inhabits middle stretches of rivers in areas with current. Can survive in reservoirs. Occurs in groups, especially during pre-reproduction migration (Ref. 59043). Also found in lakes (Ref. 26100). Feeds on vegetal matter, small invertebrates and detritus (Ref. 59043). Spawning occurs in spring in shallow water, on gravel and sometimes on timber pilings in the river. Threatened due to the introduction of other species (Ref. 26100).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Kottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. (Ref. 59043)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: subsistence fisheries; gamefish: yes
FAO(Publication : search) | FishSource |

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Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00759 (0.00451 - 0.01275), b=3.13 (2.99 - 3.27), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic Level (Ref. 69278):  2.5   ±0.24 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.18; tm=2; tmax=7).
Vulnerability (Ref. 59153):  Moderate to high vulnerability (49 of 100) .
Price category (Ref. 80766):   Unknown.