How accurately can retention of benthic macrofauna by a particular mesh size be predicted from body size of organisms?

Thomas Schlacher; T H Wooldridge

doi:10.1007/BF00017592

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How accurately can retention of benthic macrofauna by a particular mesh size be predicted from body size of organisms?

Journal article

Peer reviewed

How accurately can retention of benthic macrofauna by a particular mesh size be predicted from body size of organisms?

Thomas Schlacher and T H Wooldridge

Hydrobiologia, Vol.323(2), pp.149-154

1996

DOI: https://doi.org/10.1007/BF00017592

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Abstract

benthos

macrofauna

mesh-size

sampling

estuary

Size of organisms is frequently the prime criterion in selecting a mesh size to sample benthic assemblages. This study quantified the accuracy in estimating the sampling efficiency of screens from body size of macrozoobenthos in the upper, sandy, reaches of a small, shallow estuary, where the community consisted primarily of peracarid crustaceans and polychaetes. Body size of organisms retained by a 0.25, 0.5 and 1.0 mm screen was used to predict the retention efficiency of each gear by multiple discriminant analysis (MDA), or by simply assuming that an animal of known size will be retained by a screen of the same aperture size ('body aperture match'). MDA-models classified about 70% of all cases correctly, whereas matching of body- to screen-size gave at best spurious, and often seriously wrong estimates of retention efficiency for all tested mesh sizes. Regardless of the method employed, hotly size was found to be an extremely poor predictor of mesh retention. Consequently, sampling performance of each mesh size in a particular habitat x community combination should be determined experimentally and not from body size measurements obtained during pilot studies.

Details

Title: How accurately can retention of benthic macrofauna by a particular mesh size be predicted from body size of organisms?
Authors: Thomas Schlacher (Author) - University of Port Elizabeth, South Africa
T H Wooldridge (Author) - University of Port Elizabeth, South Africa
Publication details: Hydrobiologia, Vol.323(2), pp.149-154
Publisher: Springer Netherlands
Date published: 1996
DOI: 10.1007/BF00017592
ISSN: 0018-8158
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99449716202621
Output Type: Journal article

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