The Spatio-Temporal Distribution and Population Dynamics of Chub Mackerel (<i>Scomber japonicus</i>) in the High Seas of the Northwest Pacific Ocean.

Analysis of Gravity Center of Fishing Grounds In general, the gravity center of chub mackerel fishing grounds showed a trend moving towards the northeast ( Figure 3 B), which has been observed since 1970 [ 11 ].

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Studies have shown that the catch and catch proportion of Japanese sardine ( Sardinops melanostictus ) in the high seas of the NPO have shown an increasing trend year by year [ 50 ], leading to increased food competition with chub mackerel larvae groups.

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