Division Size dataF1

Considering that size data are of key importance for most tuna stock assessment, length data, including the total number of fish measured, should be routinely submitted to the IOTC on a 5° grid area and month basis, by gear and fishing mode (e.g. free/log schools for the purse seiners). Size data should be provided for all gears and for all species covered by IOTC. Size data sampling should preferably be run under strict and well described random sampling schemes which are necessary to provide unbiased figures for the sizes taken. The exact recommended level of sampling could vary between species (as a function of various parameters), but the specific level of recommended sampling needs to be established by the working party on statistics. More detailed size data, for instance size by individual samples, should also be made available to IOTC when requested by specific working groups, but under strict rules of confidentiality.