1956
DOI: 10.2307/1933055
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A Statistical Evaluation of Stream Bottom Sampling Data Obtained from Three Standard Samplers

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Cited by 47 publications
(15 citation statements)
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“…Sites numbers were adjusted at the superior point. The proposed formula for n calculation have been established to obtain a little more samples than the number of samples required to the stabilisation of the taxon THE LAKE BIOTIC INDEX (3) 3 richness following the Gaufin's method (Gaufin et al 1956). For small lakes, the minimum number of samples was fixed at 4 for each isobath.…”
Section: Number Of Samples and Distribution In The Lakementioning
confidence: 99%
“…Sites numbers were adjusted at the superior point. The proposed formula for n calculation have been established to obtain a little more samples than the number of samples required to the stabilisation of the taxon THE LAKE BIOTIC INDEX (3) 3 richness following the Gaufin's method (Gaufin et al 1956). For small lakes, the minimum number of samples was fixed at 4 for each isobath.…”
Section: Number Of Samples and Distribution In The Lakementioning
confidence: 99%
“…The effects on production estimates of a prolonged recruitment period (less synchronous development) and differential size-specific mortality (Benke 1976) were not considered. Problems associated with stream benthos sampling methods (Chutter 1972;Gaufin et al 1956;Kroger 1972) may well dwarf errors arising from the production calculation. The instantaneous-growth method was sensitive to both the sampling regime and the growth curve.…”
mentioning
confidence: 99%
“…The frequency of occurrence of the abundant or common kinds or groups of organisms was much less variable. Gaufin (1956) presented evidence that as many as 10-15 percent of species were not encountered, on the average, until at least 8 samples had been taken. Hellawell (1978) confirmed this, and looking in more detail at qualitative surveys based on species lists, found that more than 50 percent of the species present were collected in the first sample.…”
Section: Statistics Of Benthic Invertebrate Samplingmentioning
confidence: 99%