Rando, that's an unknown. My take - tailor will spawn as a school or in multiple schools at the same location when the conditions are suitable for maximum reproduction. If what you say is right, and I don't rule it out, it means that they would potentially be spawning at a time and place that is not conducive to maximum reproduction and therefore be detrimental to the overall success of that spawning. I don't personally believe that it would trigger a mass spawning. If there were say 100 anglers all releasing the eggs and milt over a short time span in the same location, then maybe, but I'd still be sceptical.