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The biology of Oligochaeta from Dorset chalk streams
Author(s) -
LADLE M.
Publication year - 1971
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1971.tb01547.x
Subject(s) - tubifex tubifex , oligochaeta (plant) , tubifex , biology , streams , ecology , ditch , invertebrate , computer network , computer science
Summary Fewer species and more individuals of Tubificidae were present in the soft sediments of a polluted ditch than in the relatively unpolluted Bere Stream. Changes in width frequency of natural populations of Tubifex tubifex and Limno‐drilus hoffmeisteri throughout the year were similar at both the sites investigated. In laboratory experiments larger populations of Tubifex tubifex developed in fine sediments than coarse. By means of a width‐dry‐weight relationship it was possible to estimate the weight of the experimental populations.