Thanks guys for all the great data collection. We will have a very beneficial data set with all your help.
Some of the variation in measuring the gape can be in the amount of stretch of the jaw and how the fish is held. Numerous variables can enter the measurement gathering 'picture'. Generally a smaller fish does not have a larger gape assuming each is the same species. When that happens, I question my technique and I re-measure. There is some natural variation of sizes (lengths-widths) among the same species. I'm not saying it is impossible, just doubtful or questionable. It does make evolutionary sense that an individual with a slightly bigger mouth has a competitive, predatory advantage.
A fish that is growing extra fast may have a slightly smaller head & mouth as evidenced by those here that are raising "football" shaped fish. Also a bass with low RW or is stunted may have a slightly over sized mouth compared to the body length? Basically we are looking for averages or trends for the species.
Last edited by Bill Cody; 05/29/14 11:42 AM.
