One of the inherent flaws with looking at body condition is that there is a 6 to 8 week period every year that a female largemouth bass can give the illusion of having a low relative weight because they have deposited eggs. If you could get to even an 80% accuracy with sex identification then you could harvest twice as many fish, but have a resultant significant decrease in females harvested. This would leave you a lot more fish with high-end potential but also simultaneously decrease intra-species competition.