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Terminal operator says it will seek other carriers for container terminal.
Spot rate for 40-foot container moving from Shanghai to the U.S. East Coast estimated to be more than $5,000.
Move comes as ILWU, PMA talks enter 10th month.
Marine terminal officials agree that future contracts will require ongoing collaboration.
Maersk Line CEO Soren Skou told American Shipper container lines need to adapt to permanent overcapacity, and cited Maersk's network management as the primary driver of bumper profits in recent years.
Economist revised forecasts, predicting lower import growth and a second year of declines in exports.