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The importance of the mesh size for the extraction of the muddy bottom meiofauna 1
Author(s) -
de Bovée F.,
Soyer J.,
Albert Ph.
Publication year - 1974
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1974.19.2.0350
Subject(s) - meiobenthos , fauna , population , extraction (chemistry) , terrigenous sediment , sort , biology , ecology , mathematics , paleontology , sedimentary rock , chemistry , chromatography , medicine , arithmetic , environmental health
A set of five screens (mesh apertures: 100, 80, 63, 50, and 40 µ) was used to sort twelve samples collected from fine gray terrigenous mud, at 32.5‐m depth. The data show higher counts (2,917–8,881 individuals 10 cm −2 ; annual avg = 4,855) than those previously reported by others from similar areas. Substantial variations in the percentage of extracted fauna are observed through the year. In most cases, the 100‐, 80‐, and 63‐ µ screens retain 90% of the meiofauna. A 40‐ µ mesh is necessary to study the dynamics of the nematode population; at certain times more than 30% of the individuals of some species may pass through a 50‐ µ screen.