April 26 (Reuters) - Canada’s main stock index rose on Monday, boosted by energy stocks, although gains were limited by a plunge in shares of Fortuna Silver Mines after a C$1 billion ($884.32 million) deal to buy Roxgold Inc. * Canada’s Fortuna Silver Mines Inc’s shares tumbled 12%, the most on the TSX, while Roxgold jumped nearly 20%. * At 9:54 a.m. ET (1354 GMT), the Toronto Stock Exchange’s S&P/TSX composite index was up 26.91 points, or 0.14%, at 19,129.24. * Four of the index’s 11 major sectors were higher, led by the energy sector, which climbed 0.9%, even as crude prices fell. * The largest percentage gainers on the TSX were First Quantum Minerals Ltd, which jumped 4.5%, and Turquoise Hill Resources, which rose 4%. * The most heavily traded shares by volume were Roxgold, Tetra Bio-Pharma Inc and Uex Corp. * The materials sector, which includes precious and base metals miners and fertilizer companies, lost 0.1% as gold futures fell. * On the TSX, 88 issues were higher, while 139 issues declined for a 1.58-to-1 ratio to the downside, with 23.30 million shares traded. * The TSX posted 14 new 52-week highs and no new low. * Across all Canadian issues there were 78 new 52-week highs and four new lows, with total volume of 57.06 million shares. (Reporting by Devik Jain in Bengaluru; Editing by Amy Caren Daniel)