Iceland Seafood International (ISI) posted a 33 percent increase in first-quarter earnings as retail sales continued to lift the company's operations and insulate it from foodservice industry declines.

The Reykjavik-based company reported earnings before interest and taxes (EBIT) of €3.6 million ($4.4 million), despite a 1 percent decrease in sales from a year earlier to €104.4 million ($126.9 million).

Sales in the southern European region fell nearly 10 percent compared with the opening quarter of 2020 to €37.2