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A new quantitative bottom sampler is described. It is basically a corer with top valve and core catcher, supported by a frame, and can be used for in situ studies of bottom invertebrates. It functions very well in mixed and soft sediments and fairly well in sand; it can be operated from a motor boat provided with a power winch. The area sampled is about 150 cm2, the sampling depth about 25 cm in mixed and soft sediment and about 10 cm in hard sand.
Kanneworff et al. (1972) studied this question.