Application of computer sampling in the estimation of seal diet

P. S. Hammond*, P. Rothery

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


The diet of seals is often estimated using the remains of otoliths found in their faeces. The fish weight of a given species is estimated from the partially digested otolith thickness, using empirically derived relationships and digestion coefficients. Errors of estimation arise from natural variation in the amount of fish represented in each faeces sample and measurement errors in estimating the fish weight from the partially digested otoliths. Computer sampling is used to estimate the bias and variance of the estimates, and to calculate the confidence intervals. The method is applied to data from samples of grey seal faeces in four study areas in different seasons.

Original languageEnglish
Pages (from-to)525-533
Number of pages9
JournalJournal of Applied Statistics
Issue number5
Publication statusPublished - 1 Dec 1996


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