Trendy footwear firm Deckers Outdoor Corp on Thursday reported a 68 per cent jump in first quarter earnings from the year-ago period before a change in accounting principle as sales rose nine per cent. The California-based firm, whose brands include Teva and Ugg, said earnings rose to 37 cents a share from 22 cents in the year-ago period with net sales rising to $36.1 million from $33.3m in the year-ago period.