Allegheny Beverage Corp. of Baltimore, which recently bought The Macke Co. and is attempting to sell off its Family Fish House restaurants chain, yesterday reported increased earnings for 1980.

Earnings were $5.4 million ($1.28 a share), up from $4.8 million ($1.14) for the year ended Dec. 31. Revenues were $138.9 million compared with $129.3 million.

Fourth-quarter earnings were $1.1 million (26 cents), up from $1.1 million (25 cents). Revenues were $33.8 million, up from $29.2 million.

Case sales of beverage products last year remained relatively constant, but revenues rose 7 percent over 1979 levels because of higher sales prices, the company said.

Doughtie's Foods Inc. reported its profits last year dropped almost $50,000 to $457,000 (61 cents a share) from $500,000 (66 cents) because of heavy losses by its seafood division.

Seafood operations of the Portsmouth food wholesaler lost the equivalent of 19 cents a share during 1980 and posted a 7-cents-a-share deficit for the fourth quarter.

Doughtie's other operations showed improved earnings for the year, said President Vernon W. Mules. Sales increased to $44.2 million from $37.9 million in 1979.

For the fourth quarter, Doughtie's earned $39,000 (6 cents) on sales of $11.9 million, compared with profits of $120,000 (16 cents) on sales of $9.9 million in the same period a year ago.