Table 7.

Predicted mean and range of δ¹⁸O in otoliths based on mean annual estimates of δ¹⁸O at the surface of the water⁶⁵, mean SST during the period of rapid growth (July–October) and the fractionation equation for Pacific bluefin tuna⁶⁷.

Area number	Location	Predicted δ18O in otoliths (‰)
		Mean	Minimum	Maximum
1	Gulf of Mexico	− 1.84	− 1.93	− 1.71
2	Bahamas	− 1.45	− 1.79	− 1.10
3	Slope Sea west	− 0.83	− 1.45	− 0.14
4	Slope Sea east	− 0.88	− 1.45	0.25
5	Gibraltar	0.32	0.10	0.74
6	Canaries	0.03	− 0.41	0.55
7	Western Mediterranean	0.05	− 0.20	0.80
8	Eastern Mediterranean	0.03	− 0.40	0.59
9	Central Mediterranean	− 0.03	− 0.45	0.75
10	Bay of Biscay	0.75	0.37	1.11
11	Central Atlantic	− 0.08	− 0.76	0.78