Doesn’t make the results less accurate. Might make them irrelevant, refutable, biased, abnormal, etc. But, the accuracy of an experiment isn’t inherently affected by human influence. In fact, I’m struggling to visualize a scientific experiment without human influence.
Regardless, do you have a link to any of the peer-reviews? That could prove to be equally educational, specifically if they’re refuting his information based on their own research/experiments and elaborate on their methods, findings, interpretations, etc.
Also, I replied because your responses seemed to indicate the concept of scientifically studying fish as a whole, not specifically Dr. Jones’ book.