METHODOLOGICAL INSIGHTS: Comparing the precision and cost‐effectiveness of faecal pellet group count methods

摘要: Summary 1 Faecal pellet group (FPG) count data are widely used to estimate animal abundance, with two alternative methods normally employed. Faecal accumulation rate (FAR) techniques measure the daily of groups, while faecal standing crop (FSC) overall density. To both require estimates defaecation rate. FSC also an decomposition In general, FAR considered less prone bias more precise and cost-effective. On balance, majority authors practitioners prefer methods, although little empirical evidence supports this decision. 2 FPG were obtained from 26 study areas compare precision when applied wild deer populations in UK uplands. The time needed collect was quantified 10 areas. 3 The coefficients variation (CV) ranged 9% 23% approximately 0·7–0·9 times those equivalent data. related density groups. average, took 80 min per plot obtain, taking 1·6–1·9 longer. 4 For abundance be comparable range conditions studied, trials would a CV 5–20%. While number studies report possible, obtain level generally exceed net available that results deployment rather than counts. 5 Synthesis applications. Using levels finance most managers uplands, using on individual sites up 20 000 ha appear cost-effective compared terms their precision. As thought have potential for appropriate environmental conditions, they should preferred over estimating concealing habitats.