Rutilus caspicus, Caspian roach

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Rutilus caspicus (Yakovlev, 1870)

Caspian roach
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No image available for this species;
drawing shows typical species in Leuciscidae.

Classificatie / Names Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Cypriniformes (Carps) > Leuciscidae (Minnows) > Leuciscinae
Etymology: Rutilus: Latin, rutilus = reddish (Ref. 45335).

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

; zoet water; brak water benthopelagisch. Temperate; 1°C - 17°C (Ref. 59043)

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Eurasia: Northern and northwestern Caspian Sea; enters Volga, Ural, Emba, Terek and Kura drainages for spawning.

Grootte / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 45.0 cm SL mannelijk / geslacht onbekend; (Ref. 59043); max. gepubliceerd gewicht: 2.0 kg (Ref. 59043); max. gerapporteerde leeftijd: 10 Jaren (Ref. 59043)

Korte beschrijving Morfologie | Morfometrie

Can be diagnosed from its congeners in Caspian Sea basin by having the following characters: 39-48 (usually 42-44) scales along the lateral line; body laterally compressed, depth 24-37% SL; dorsal fin usually with 9½ branched rays; anal fin usually with 10½ branched rays; mouth subterminal; snout rounded; iris silvery grey; pectoral pelvic and anal fins grey with dark margins (sometimes slightly red in autumn, outside spawning season); breeding males with fine, scattered tubercles on top and side of head (Ref. 59043)

Biologie     Verklarende woordenlijst (bv. epibenthic)

A semi-anadromous species which occurs mostly in shallow brackish coastal waters. During summer at the sea, adults are most abundant at water depth of 2.5-4.0 m and salinity of 2-4 ppt. Enters freshwater of estuaries, lagoons and lower reaches of large rivers to spawn. In rivers, juveniles take plankton (mostly Cladocera) and small benthic animals as food. At the sea, they feed on oligochaetes, chironomid larvae and algae. Adults also prey on crustaceans, worms and chironomids larvae. Spawns on shallow shores of coastal lakes and flooded areas. After spawning adult move back to the sea to join groups of immature juveniles, not traveling for long distances, staying in areas with high abundance of prey. Larvae migrate to the sea (Ref. 59043).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Deposits sticky eggs among plants. An annual spawner, but some females spawn only every second year (Ref. 59043)

Hoofdreferentie Upload your references | Referenties | Coördinator | Medewerkers

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

Status op de Rode Lijst van het IUCN (Ref. 130435)

  Niet bedreigd (LC) ; Date assessed: 01 January 2008

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

FAO - Publication: search | FishSource |

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Estimates based on models

Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5020   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00724 (0.00358 - 0.01465), b=3.14 (2.98 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.4   ±0.40 se; based on food items.
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tm=2-5).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (42 of 100).