While watching In-Fisherman the other day, they were promoting "selective harvest". As I understand it, "selective harvest" is keeping the smaller fish, and releasing the larger fish. The theory behind selective harvest appears to be that the genetically superior fish (the big healthy ones) should be released (so they can reproduce), and the unhealthy-genetically inferior fish should be weeded out of the gene pool, right? While the theory sounds nice, is it actually possible to weed out the genetically inferior fish? In other words, how do "selective harvesters" know when they harvest a small fish, it's not a healthy youngfish. In other words, it is possible genetically superior fish are being harvested because they are only a year to two old. In my mind this practice could result in putting a major dent in a young generation of fish... Any other thoughts?