Correction to: Mammal Research

https://doi.org/10.1007/s13364-020-00485-z

The original published version of this article contained an error.

The reference Hartman et al. 2015 should have been cited as Hartman et al. 2016. The reference information is shown as follows:

Reference

Hartman KL, Wittich A, Cai JJ, van der Meulen FH, Azevedo JM (2016) Estimating the age of Risso's dolphins (Grampus griseus) based on skin appearance. J Mammal 97:490–502

The original article has been corrected.