Author: (Berg, 1931)
FBname: Ukrainian brook lamprey
Remark: This species needs a complete re-evaluation Renaud (2011; Re. 89241:41), and may be a complex of species.  Please send references, or more studies are needed.
Comments: Adults are found in freshwater; in brooks, rivers, and lakes (Ref. 89241).  They inhabit the mountain and foothill zones of watercourses containing clear water with a strong current and gravel-sand substrate.  The ammocoetes larvae live in detritus-rich sand-mud substrates in areas of weak current, frequently beneath overhanging banks.  Ammocoetes feed on diatoms and detritus; adults don't feed. Metamorphosis occurs in September in Poland and Slovakia and in July in the Ukraine. Ammocoetes used as live bait (Ref. 12283).  Adults are preyed upon by <i>Esox lucius</i> (Ref. 89241), the chub (<i>Leuciscus cephalus</i>) and other predators in the period of their spawning (beginning of May to beginning of June).  Mature individuals form spawning aggregations (Ref. 59043).  Spawning occurs on gravel and sand substrates, also possibly over hard white clay (Ref. 58030),  in late April - early May in the Ukraine. Fecundity, 1,950-7,106 eggs/female (Ref. 89241).  Adults are nonparasitic. However, rare cases of ectoparasitism have been reported in Jelesná Brook, Slovakia and the Prut River, Ukraine (Ref. 89241).