Eichwald's riffle minnow

biology_ecology

Habitat. Foothill streams and rivers with well-oxygenated, fast-flowing water. Also, lakes and reservoirs. Spawns in streams on gravel. Lake populations migrate to inflowing streams and rivers to spawn. Biology. Lives up to 7 years. Females larger than males. Matures at 1 – 3 years. Spawns April – June at water temperatures between 13 and 18 ° C, over gravel beds in fast currents. Females lay 2 – 3 portions of eggs per season. Eggs are sticky and adhere to substrate. Feeds mainly on benthic invertebrates and terrestrial organisms, falling on water, and algae.

Handbook of Freshwater Fishes of West Asia

diagnosis

Diagnosis. Distinguished from other species of Alburnoides in Caspian basin and Hari drainage by: ○ horizontal eye diameter smaller than interorbital distance / ○ 13 − 15, usually 14, predorsal vertebrae / ○ body depth at dorsal origin usually greater than head length / ○ ventral keel scaleless, partly or completely covered by scales, usually completely or almost completely scaleless / ○ snout slightly to markedly rounded / ○ upper lip slightly projecting lower lip / ○ tip of mouth cleft situated at a horizontal line slightly to markedly below middle of eye / ○ 45 − 54 + 2 − 3 lateral-line scales / ○ 10 − 14 ½, usually 11 − 13 ½, branched anal rays / ○ 5 − 9, usually 7 − 8, gill rakers / ○ 13 − 15, usually 14, predorsal vertebrae. Size up to 142 mm SL.

Handbook of Freshwater Fishes of West Asia

discussion

Remarks. Molecular studies suggest that A. eichwaldii hybridises with A. samiii in small coastal rivers south of Kura.

Handbook of Freshwater Fishes of West Asia

description

Common name: Kura chub Taxonomy: Original description: Alburnus eichwaldii DeFilippi 1863: 392 [Kura River near Tiflis [T'bilisi], Georgia, Eurasia; syntypes: MZUT 677 (4), NMW 55516 (2)]. Revisions. None. Illustrations. Jouladeh-Roudbar et al. (2020: 114, fig. 201).

Freshwater lamprey and fishes of Iran: Reappraisal and updated checklist with a note on Eagderi et al. (2022)