Intra‐population variability of life‐history traits and growth during range expansion of the invasive round goby, Neogobius melanostomus

摘要: Fish can undergo changes in their life-history traits that correspond with local demographic conditions. Under range expansion, a population of non-native fish might then be expected to exhibit suite differ between the edge and centre population’s geographic range. To test this hypothesis, an expanding round goby, Neogobius melanostomus (Pallas), early newly established sites Trent River (Ontario, Canada) were compared 2007 2008. Round goby area first introduction exhibited significant decrease age at maturity, increased length 1 they GSI from While individuals edges promote growth under low intraspecific density, yearly variability suggests additional processes such as declining density fluctuating food availability are influencing reproductive strategy during invasion.