Abstract
A feeding classification scheme of free-living marine nematodes devised by Wieser (1953) is presented for ecological studies of the nematode assemblages as a valuable analytical tool. The classification is based upon the structure of the buccal cavity and each of the feeding types, 1A (selective deposit feeders), 1B (non-selective deposit feeders), 2A (epigrowth feeders), 2B (predators/ omnivores), is speculated to utilize different food resources. Their relative proportions in a nematode assemblage depend upon the nature of the available food connected with other environmental factors in the habitat. The change of these proportions is believed to indicate the variation of the environmental conditions.
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