Benthos Trapped Leaving the Bottom in Bideford River, Prince Edward Island

摘要: Inverted funnel traps, designed to catch animals swimming up from the bottom, set in Bideford River estuary, P.E.I., during the summer of 1969 caught numerous benthic and hyperbenthic invertebrates. Many crustaceans generally considered to be planktonic appeared to enter the substratum during the day and to leave it at night. Several polychaetes, some of which were not known to swim, were regularly collected. The average catch per square meter per day was 23 individuals, amounting to 0.08 g (decalcified dry weight).