Please make the following correction in an issue of this journal:
Volume 135(3), May 2006: ““Observer Error Structure in Bull Trout Redd Counts in Montana Streams: Implications for Inference on True Redd Numbers,”” by Clint C. Muhlfeld, Mark L. Taper, David F. Staples, and Bradley B. Shepard, pages 643––654.
Page 647. The variance of the number of true redds was incorrectly given as [;[T′′p(1 −− p) ++ λλ]]/p 2.
The second sentence in the first paragraph of the second column should read as follows:
If λλ and p are assumed to be known and constant, the pseudo-likelihood (Hall 1990) estimate of the mean number of true redds given an observed count (T′′) is equal to (R −− λλd)/p, and its associated variance is [;[T′′p(1 −− p) ++ λλd]]/p 2.