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Achondrostoma occidentale  (Robalo, Almada, Sousa Santos, Moreira & Doadrio, 2005)

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Portugal country information

Common names: Ruivaco do Oeste, Western ruivaco
Occurrence: endemic
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known only from the rivers Sizandro, Safarujo and Alcabrichel in Estremadura, central western Portugal (Ref. 55625). Fish populations are under critical situation. The drainages where this species occurs receive discharges of large amounts of sewage from pig farms, distilleries and the very intense agriculture of the surrounding area (Ref. 55625). Threatened due to pollution, intensive agriculture and water abstraction (Ref. 59043). Status of threat: endangered (Ref. 59043).
National Checklist: Portugal
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/po.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Robalo, J.I., V.C. Almada, C.S. Santos, M.I. Moreira and I. Doadrio, 2005
National Database: Portuguese Freshwater Fishes

Classification / Names

Actinopterygii (ray-finned fishes) > Cypriniformes (Carps) > Cyprinidae (Minnows or carps) > Leuciscinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 9.5 cm SL male/unsexed; (Ref. 59043)

Environment

Freshwater; benthopelagic

Climate / Range

Temperate

Distribution

Europe: Alcabrichel, Sizandro and Safarujo drainages in Estremadura, Portugal.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Belongs to the Chondrostoma arcasii - C. oligolepis species group characterized by lack of horny blade on the lower lip and having a lateral line scale which is much lower than other bladeless species of Chondrostoma. Distinguished from C. arcasii and C. oligolepis by the following combination of characters: 40-43 canaliculate scales on the lateral line; 6-7 scales above the lateral line; 2-3 scales below the lateral line. Axillary pelvic scale shorter than or equal to the insertion of the pelvic fin; and the coronoid process of the dentary is very thick (Ref. 55625). Diagnosed from its congeners by the possession of the following characters: lateral line usually with 37-41 + 2-3 scales; 3-4 (modally 3) scale rows between lateral line and pelvic fin origin; 14 circumpeduncular scale rows; eye diameter greater than snout length; snout usually pointed, conical; and ventral profile of head without marked angle at articulation of lower jaw (Ref. 59043).

Biology     Glossary (e.g. epibenthic)

Found in small coastal streams that have a greatly reduced water flow in the dry summer period (Ref. 55625). During dry summer time, fish become concentrated in a few pools seeking shelter in shady areas under the cover of vegetation (Ref. 55625). Occur in lower stretches of rivers. Threatened due to pollution, intensive agriculture and water abstraction. Size reaches up to at least 9.5 cm SL (Ref. 59043).

IUCN Red List Status (Ref. 115185)

  Endangered (EN) (B1ab(iii)+2ab(iii))

Threat to humans

  Harmless



Human uses

More information

Countries
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Ecology
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Morphometrics
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Internet sources

BHL | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | ECOTOX | FAO(Publication : search) | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | National databases | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | uBio RSS | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record | Fishtrace

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.5625 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.0   ±0.2 se; Based on size and trophs of closest relatives

Resilience (Ref. 69278)
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Vulnerability (Ref. 59153)
Low vulnerability (23 of 100)
Price category (Ref. 80766)
Unknown