TORONTO, April 13 (Reuters) - Canadian pension manager Investment Management Corporation of Ontario (IMCO) is exiting its C$3.8 billion ($3 billion)investment in fund of hedge funds and re-investing in single-name strategies, CEO Bert Clark told Reuters on Tuesday. IMCO, a top pension manager in Canada with C$73.3 billion ($58.5 billion) in assets under management, had allocated 5% of their portfolio to fund of hedge funds.