The Rudd is medium-sized, top-feeding species that can grow to 20-25 cm and 0.5-1.0 kg. The species is native to Europe where it is widespread. The species usually matures at 2-4 years and lives 10-14 years. They prefer zooplankton, weed-dwelling invertebrates and terrestrial insects on the surface. Rudd apears always to spend their time in compact shoals, no matter how large they get. The Rudd is a popular fish to catch, being attractive and readily taking bait.
While rudd are tolerant, it is likely that environmental conditions can be stressful at least some of the time for them to develop squamous cell carcinomas. Although the exact cause is still unknown, but the possibilities of carcinogenic compounds resulting from the high nutrient levels, or of carcinogenic algal toxins produced during algal blooms, may be the factors.
- Fisheries Management: A manual for still-water coarse fisheries. Ian Wellby, Ash Girdler, Robin Welcomme
- Epidemiology of squamous cell carcinomas in rudd Scardinius erythrophthalmus from SE Ireland.