Description and characteristics
The ide (Leuciscus idus) is a medium-sized cyprinid with an elongated, robust body covered with silvery scales. It has orange-red pelvic and anal fins, which intensify at maturity.
Habitat and distribution
It prefers clean fresh waters with moderate currents — Danube branches and canals of the Danube Delta. It lives in schools, near the bottom or vegetation.
Diet and behaviour
It is omnivorous, feeding on invertebrates, larvae, insects, vegetation and small fish. It is active and opportunistic.
Reproduction
Spawning occurs in spring at 8–12°C, with females laying eggs on vegetation and bottoms. The fry grow moderately.
Economic and ecological importance
The ide has value for sport fishing, appreciated for its resistance on the hook. Ecologically, it contributes to the balance of flowing waters.
Threats and conservation
It is sensitive to pollution and modification of water courses. Protection of clean flowing habitats is important.
Fishing and legal minimum size
The ide is caught with a rod, natural or artificial baits. In the table of minimum legal sizes, the ide (Leuciscus idus) has a minimum legal size of 30 cm.
Conclusion
The ide is a robust, active cyprinid, important for the biodiversity of the fresh waters of the Danube Delta.