"While there are bright spots within Sealord Group, unfortunately heavy losses from Sealord's Argentinian operations have dragged down the performance of the group."
Sealord intended to completely close down the Argentinian business by the end of the financial year.
As a consequence, Sealord had made an investment write-down to bring the Argentinian assets in line with their realisable values.
This resulted in Aotearoa's share of the Sealord profit for the six months ending 31 March 2013 being a loss for the period.
Business conditions in the second half of the year were expected to remain similar to the first half, Aotearoa said.
Aotearoa's business also comprises Moana Pacific Fisheries, OPC Fish and Lobster, Prepared Foods, Pacific Marine Farms and Kia Ora Seafoods.
Aotearoa said the performance of its own business units, outside Sealord, was "pleasing".