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The biology of Psammoryctides barbatus (Grube) in English chalk streams
Ladle, M.; Bird, G.J. (1984). The biology of Psammoryctides barbatus (Grube) in English chalk streams, in: Bonomi, G. et al. (Ed.) Aquatic Oligochaeta: Proceedings of the 2nd International Symposium on Aquatic Oligochaete Biology, held in Pallanza, Italy, September 21-24, 1982. Developments in Hydrobiology, 24: pp. 109-112
In: Bonomi, G.; Erséus, C. (Ed.) (1984). Aquatic Oligochaeta: Proceedings of the 2nd International Symposium on Aquatic Oligochaete Biology, held in Pallanza, Italy, September 21-24, 1982. Reprinted from Hydrobiologia, vol. 115. Developments in Hydrobiology, 24. W. Junk Publishers: Dordrecht. ISBN 90-6193-775-2. 240 pp., more
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, more

Also published as
  • Ladle, M.; Bird, G.J. (1984). The biology of Psammoryctides barbatus (Grube) in English chalk streams. Hydrobiologia 115: 109-112, more

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Keyword
    Marine

Authors  Top 
  • Ladle, M.
  • Bird, G.J., more

Abstract
    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° 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.

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