Correction to: Nature Ecology & Evolution https://doi.org/10.1038/s41559-019-0974-3, published online 16 September 2019.

In the version of this Brief Communication originally published, in the legend above the graph in Fig. 1i the descriptions for the white and grey data were inadvertently switched; they should have read “Cyprinus (black), Carassius (white), others (grey)”; this has now been corrected.