Until 1993, the general length-weight relationship adopted by ICCAT (a=6.303x10-6, b=3.2825) was the one developed by Beardsley (1971), based on fish that ranged from 60 to 115 cm FL. However, the first ICCAT Albacore Workshop (Anon 1990) recommended to build and properly document new area specific relationships based on a broader size range. The new length-weight relationships adopted by ICCAT for the northern, southern and the Mediterranean stocks are shown in Table 2.