Studies involving wildlife management can not technically be proven, that is why words such as 'suggests' and 'further studies needed', are used and why words such as 'proves' can not be used, because there are so many variables to consider and each population is different.
I can not 'prove' this but I would venture to say that the limit change from 25 to 15 has ZERO effect on the trout population (numbers, size, health, fecundity, etc.) of Big Lake. Recreational fishermen put hardly a dent in the population of a species such as trout. I would also venture to say that an increase from 15 even up to 50 would have such a small effect it would not matter.
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