Natal origin of Pacific bluefin tuna from the California current large marine ecosystem

R.J. David Wells, John Mohan, Heidi Dewar, Jay Rooker, Yosuke Tanaka, Owyn Snodgrass, Suzanne Kohin, Nathan Miller & Seiji Ohshimo
Natal origin of subadult (age-1) Pacific bluefin tuna (PBT, Thunnus orientalis) from the California Current Large Marine Ecosystem (CCLME) was determined using natural tracers in ear stones (otoliths). Age-0 PBT collected from the two known spawning areas in the western Pacific Ocean (East China Sea, Sea of Japan) were used to establish baseline signatures from otolith cores over four years (2014-2017) based on a suite of trace elements (Li, Mg, Mn, Sr, Zn, and Ba)....
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