SALMON farmer Tassal Group has appointed Trevor Gerber as a non-executive director, after three directors quit last week.

Mr Gerber, a chartered accountant, is a director of Sydney Airport Holdings Ltd and a member of the advisory board of construction and property firm St Hilliers Group.

Mr Gerber was nominated by the Orbis Group, which has a substantial holding in Tassal.

On March 30, Tassal chairman Allan McCallum said in a statement to the Australian Securities Exchange that David Groves, Gary Helou and Clive Hooke had quit Tassal's seven-person board.

In that statement, Mr McCallum provided no reasons for the resignations but said later that the three directors had quit for "a range of personal issues".

Mr McCallum was not immediately available to comment on Mr Gerber's appointment yesterday.

Tassal booked a profit for the first half of the 2011-12 financial year of $12.96 million, down from $14 million in the prior corresponding period.

The company is focusing on growing per capita consumption of salmon in the domestic market and has forecast improved earnings for the second half of the 2011-12 financial year.

Shares in Tassal were two cents lower at $1.34 at 12.18pm AEST yesterday.