Abstract
A new quantitative grab for sampling benthos is described. It is constructed of stainless steel to retard corrosion, and incorporates six features designed to make it outperform other grabs: 1) a frame support; 2) counter-weighted arms; 3) overlapping buckets; 4) upright posts on the frame for addition of weights; 5) a fine mesh cover on each bucket; and 6) a moving elliptical pivot point. These features result in high reliability compared to other grabs, and a somewhat quadrangular bite profile. The model in use digs to 6 cm depth over the entire area sampled, and penetrates to a maximum of 11.5 cm.
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Grizzle, R.E., Stegner, W.E. A new quantitative grab for sampling benthos. Hydrobiologia 126, 91–95 (1985). https://doi.org/10.1007/BF00008392
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DOI: https://doi.org/10.1007/BF00008392