MORPHOLOGY OF RINGS ON OTOLITH AND SPINE CHARACTERS FROM NORTH ATLANTIC ALBACORE OF 40-44 CM FORK LENGTH

The otolith growth pattern of daily rings can be described as (1) a clear nuclei piled with constant oval shaped ring increment to about 12 counts, yet unfortunately, this segment was often lost; (2) followed by greater ring increment alongside the oval long axis direction for a period of time; (3) then followed by a sudden shifting of growth direction of about 60 degrees toward the oval short axis, in such a way that often produced a notch alongside the oval long axis. A In company with such growth pattern, four groups of daily ring gatherings can be identified.