Ref ID : 5870
M. Ladle and G.J. Bird; The biology of Psammoryctides barbatus (Grube) in English chalk streams. Hydrobiologia 115:109-112, 1984
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The tubificid Psammoryctides barbatus is common in the sediments of English chalk streams. The species is primarily a spring and summer breeder with the most intense period of reproduction from April to June throughout its distribution in the river. Recruitment of juveniles takes place chiefly from June to August and most of the worms attain maturity in the following spring. In culture at 15 degrees C worms had attained 38 mm within 90 days of hatching and showed early signs of maturity. Growth rates and rates of cocoon production in culture are presented.