Fig. 4From: Maturation at a young age and small size of European smelt (Osmerus eperlanus): A consequence of population overexploitation or climate change? a Temporal trend in mean long-term mean abundance of copepod nauplii from mid-May to late-July, b sea surface temperatures from mid-May to late-July, c and the sum of mean monthly winter (January–March) air temperature in European smelt larval and YoY retention grounds in 1982–2013Back to article page