Journal of Experimental Biology was alerted by readers and on PubPeer to an issue with J. Exp. Biol. (1996) 199, 237-244 (doi.10.1242/jeb.199.1.237).
The length of the experimental tunnel is 3.35 m in Fig. 6, but the same results are reported for a tunnel of length 3.20 m in Srinivasan et al. (1997) (doi:10.1242/jeb.200.19.2513). Unfortunately, the original data, analyses and figure plots are not available to determine the reasons for this discrepancy.
The corresponding author, M. V. Srinivasan, believes that the length of the tunnel was not 3.35 m as reported in the 1996 paper, but 3.20 m as indicated in Srinivasan et al. (1997) and in several later review articles. Srinivasan takes sole responsibility for the error and apologises for any inconvenience caused, but states that the issue does not alter the overall results and conclusions of the paper.
We are publishing this Expression of Concern to make readers aware of the issue and our efforts to resolve it.
See also doi:10.1242/jeb.248085.