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Table 3
Number of mature females and females with postovulatory follicles (POFs) <24 h old, spawning frequency, and spawning interval for Pacific bluefin tuna in the Kuroshio and Kuroshio-Oyashio transition areas.
| Year | Mature female with POF (n) | Mature female (n) | Spawning frequency | Spawning Interval | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| May | June | July | August | September | May | June | July | August | September | May | June | July | August | September | May | June | July | August | September | |
| 1994 | 0 | 0 | 2 | 0 | 0.00 | NA | ||||||||||||||
| 1995 | 6 | 37 | 0.16 | 6.17 | ||||||||||||||||
| 1996 | 0 | 29 | 0.00 | NA | ||||||||||||||||
| 1997 | 0 | 17 | 0.00 | NA | ||||||||||||||||
| 1998 | 0 | 3 | 0.00 | NA | ||||||||||||||||
| 1999 | 0 | 24 | 0.00 | NA | ||||||||||||||||
| 2000 | 17 | 22 | 0.77 | 1.29 | ||||||||||||||||
| 2002 | 20 | 0 | 24 | 9 | 0.83 | 0.00 | 1.20 | NA | ||||||||||||
| 2004 | 0 | 16 | 17 | 18 | 0.00 | 0.89 | NA | 1.13 | ||||||||||||
| 2005 | 15 | 0 | 16 | 0 | 0.94 | NA | 1.07 | NA | ||||||||||||
| 2006 | 7 | 29 | 0.24 | 4.14 | ||||||||||||||||
| 2007 | 0 | 0 | 19 | 27 | 0.00 | 0.00 | NA | NA | ||||||||||||
| 2016 | 0 | 0 | 9 | 19 | 0.00 | 0.00 | NA | NA | ||||||||||||
| Total | 17 | 33 | 31 | 0 | 0 | 41 | 142 | 108 | 30 | 0.41 | 0.23 | 0.29 | 0.00 | NA | 2.41 | 4.30 | 3.48 | NA | NA | |
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