I would like to make an experiment on polychaetes in laboratory and i need some references about how doing it.The polychaetes concerned are considered as deposit feeders (spio,scoloplos nereis...).Thank you for help. Degas Valerie university of east anglia school of biological sciences NR47TJ NORWICH(ENGLAND) E-MAIL:V.Degas at cpca2.uea.ac.uk