In the below website you can find details about restrictions pertaining to certain nationalities:
Crew changes are possible here in the port of Manta or at anchorage area. In case nationalities of the above details you will have to pay the Migration fees which have to find details calling to the Migration office: + 593-52-921200
There are no restrictions but depends on the crew nationalities.
There is no seaman mission here in Manta.
Manta has the following consulates available here as follows:
Spain, Panama, Germany, China, South Korea and Chile.