Invasive round goby shows higher sensitivity to salinization than native European perch

Salinity is an influential abiotic environmental factor in aquatic species, specifically freshwater, where salinization causes ecosystem degradation. Secondary salinization, that increases salinity due to anthropogenic activities, can affect both osmoregulation and behaviour freshwater fishes. It generally believed invasive species handle climatic change degradation better than native which one reason for their invasion success. However, how cope with changes remains little understood. Therefore, we investigated low (500 µS/cm) high (2000 conditions affected oxygen consumption the round goby ( Neogobius melanostomus ) European perch Perca fluviatilis ). Our results showed increased swimming non-swimming movements changed response increments, whereas was not by salinity. Thus, it seems as if more sensitive perch. fit minority of studies indicating being less tolerant some changes. This finding could be explained adaptation its long establishment River Rhine. Further, our are also confirming effect species-specific. In addition, show diametrically different behavioural disturbance holding ecological niches well anatomical differences.