Improved Methods of Sampling Post-Larval Young Fish and Macroplankton

In recent years the general adoption of high-speed plankton samplers has given new impetus to studies of the distribution and survival rate of larval and post-larval fishes; instruments ranging in size from the small Hardy Indicator type to enlarged versions of the Gulf III have been widely employed (e.g. Glover, 1953, 1961; Gehringer, 1952, 1962; Ahlstrom, Isaacs, Thrailkill & Kidd, 1958; Bary, de Stefano, Forsyth & van den Kerkhof, 1958; Bridger, 1958; Hempel, 1959, 1964; Miller, 1961; Kinzer, 1962, 1966; Clarke, 1964; Beverton & Tungate, 1967). At Plymouth a version of the Gulf III proved exceptionally useful for rapid surveys of the distribution of macroplankton indicator species in the Western English Channel and approaches in 1958–60 (Southward, 1962).