This record describes the datasets obtained on Courageous Cruise 011. The data were obtained from waters in the Bass Strait, and in waters off the coasts of northeast Tasmania, Victoria and New South Wales in August and September 1976. Data were obtained from acoustic and trawl surveys of Jack mackerel (Trachurus declivis) and other demersal and pelagic fish. Year class, length and gonad stage were determined. Additional information regarding this dataset is contained in the cruise summary for this voyage.(derived from the cruise report) - Biological Field Data Sheets recorded during this voyage have been scanned to PDF, and are available (to CSIRO Staff) on-line. See the details link under "Stored Media List" (below).