** Shares of U.S. trucking firm J.B. Hunt Transport Services JBHT.O fall 4.6% to $128.91 in aftermarket trading

** Company reports fall in Q1 profit due to a decrease in average truck count

** Reports Q1 profit of $117.7 million or $1.17 per share compared to $127.5 million, or $1.22 per share last year

** Posts Q1 revenue of $2.92 billion, a 1% decline from $2.94 billion last year

** As of Tuesday's close, stock down 20.8% YTD

(Reporting by Vallari Srivastava in Bengaluru)

((Srivastava.Vallari@thomsonreuters.com;))