PDO 또한 북서 태평양 및 북부 산란장 면적과 음의 상관성이 있으며, 시기별로 1990년대, 2000년대, 1980년대순으로 그 평균값이 낮았다.
Additionally, the PDO had a negative correlation with the Northwest Pacific and northern spawning grounds, and its average value was low in the 1990s, 2000s, and 1980s, respectively.