That's not good, you should be training for the game, if practice isn't in concert with game time situations that is not a good sign. You should look at power and endurance on opposite ends of a continuum, training for one naturally detracts from the other. You are probably not going to change the way your coach runs practice so I would probably try to counter what he is doing by training for power off-ice.
@Dave: I'm 40 years old and this is a hobby. I'm just tired of gassing out during practice. I can squat 300 lbs for several reps, but that doesn't have a lot of carryover to standing in the net in my goalie stance for 10 minutes at a time while people shoot on me. I'm actually confident that my game will be fine. Incidentally, I'm not talking about doing one to the exclusion of the other, once I feel my cardio is up to snuff, I'll add back in my heavier squats. I'm doing a bunch of plyo work too, so that helps with the power.