La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Selective feeding by the aquatic oligochaete Tubifex tubifex (Tubificidae, Clitellata)
Auteurs :	P. Rodriguez, Auteur ; M. Martinez-Madrid, Auteur ; J. A. Arrate, Auteur ; E. Navarro, Auteur
Type de document :	Article
Dans :	Hydrobiologia (463 NOV 1 2001)
Article en page(s) :	133-140
Résumé :	The particle size distribution of faecal pellets produced by the tubificid worm Tubifex tubifex in laboratory culture, was measured with a Coulter(R): Multisizer. The faecal material from worms cultured in a range of sediments was composed of particles with a mean diameter of less than 63 mum, and only a few isolated larger particles were found by microscopic analysis. This suggests that this species actively selects the silt-clay fraction, avoiding larger sand particles. A more detailed analysis of faeces revealed that about 75%, by volume, was composed of particles with a mean diameter

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