La biologie du suceur cuivré (Moxostoma hubbsi) comparée à celle de quatre autres espèces de Moxostoma (M. anisurum, M. carinatum, M. macrolepidotum et M. valenciennesi)

摘要: The copper redhorse, Moxostoma hubbsi (Legendre), which was discovered in 1942, is a threatened and endemic fish species of the lowlands around Montreal (Quebec). A survey historical data, an investigation preserved specimens, comparison selected biological characteristics five Quebec living sympatry Richelieu River show that this redhorse has unique combination life history characteristics. Compared with other redhorses, it among most long-lived (more than 20 years), highest growth rate fecundity, latest spawner, its reproduction probably taking place at end June or beginning July. shows high degree specialization use alimentary resources feeds almost exclusively upon molluscs. stomach contents different little diet overlap. This may be due to their pharyngeal apparatus t...