Like Steph, I think this idea is sort of silly. There too many unfounded assumptions that have to be made about the nature of consciousness for it to work. You would have to assume that it is an elemental substance that follows it's own law of conservation for example. I think that is patently absurd. If there was a finite supply of consciousness on earth, we would either see a fixed level of humans on earth or if we are generous enough to allow that different animal consciousnesses are mixable, a finite level of neural life in general. Both assumptions are emperically unfounded.

Consciousness is likely a pattern in existing matter and patterns do not follow laws of conservation. Yes, there is a limit to how much consciousness there can exist in our universe but that limit is founded on the material substrate that the consciousness is imprinted upon, not some consciousness meter of the universe!