April 15 (Reuters) - Canada's main stock index fell on Monday, as oil prices halted their rally, pressuring the energy sector.
* At 9:35 a.m. ET (1335 GMT), the Toronto Stock Exchange's S&P/TSX Composite index .GSPTSE was down 29.33 points, or 0.18 percent, at 16,451.2.
* Five of the index's 11 major sectors were lower, led by the energy sector.
* Energy stocks .SPTTEN dropped 0.3 percent as U.S. crude CLc1 prices were down 0.7 percent, while Brent crude LCOc1 lost 0.6 percent. O/R
* Oil eased with Brent futures falling below $71 per barrel on signals that Russia may exit production cuts.
* The materials sector .GSPTTMT , which includes precious and base metals miners, lost 0.6 percent as gold prices fell on improved risk appetite. GOL/
* On the TSX, 93 issues were higher, while 134 issues declined for a 1.44-to-1 ratio to the downside, with 11.15 million shares traded.
* The largest percentage gainers on the TSX were Lundin Mining LUN.TO , which jumped 7.3 percent after it said it would buy gold-copper mine of Yamana Gold Inc YRI.TO in Brazil for more than $1 billion as it looks to beef up its base metals portfolio. Yamana Gold fell 3.8 percent. Aphria Inc APHA.TO fell 13.7 percent, the most on the TSX, after reporting quarterly revenue that missed expectations.
* The most heavily traded shares by volume were Prometic Life Sciences PLI.TO , Aphria and Aurora Cannabis ACB.TO .
* The TSX posted four new 52-week highs and no new low.
* Across all Canadian issues there were 24 new 52-week highs and six new lows, with total volume of 24.67 million shares.