New York—After ending 2005 on a positive note, magazine ad pages and revenue declined in January, according to figures released Wednesday by the Magazine Publishers of America’s Publishers Information Bureau. Ad pages fell nearly 2% and total magazine rate-card reported ad revenue dropped 0.3%, compared with January 2005. In December, ad page volume had risen 3.4% and revenue was also up 3.4%, compared with the year-earlier period. It was a mixed bag for the business books in January. Fortune took a severe hit, as ad revenue plunged 31% compared with the same period in 2005, and ad pages fell 35%. Ad revenue for Forbes was down 7%, while ad pages fell 5%. Ad revenue was down 2% for The Economist and ad pages off 14%. BusinessWeek, which ended 2005 in negative territory adwise and late last year shuttered its European and Asian print editions, bucked the downward trend. Its ad revenue was up 13% while pages rose 19%.