Oklahoma commercial fishermen on Lakes Texoma, Grand, Eufaula, and Gibson were studied from July 1967 to June 1968. In each quarter samples of fish were weighed prior to cleaning, by a commercial fisherman, and immediately afterwards. Linear and curvilinear regressions are fitted to these data. Between lake and between season comparisons are made. Information is presented for smallmouth buffalo, bigmouth buffalo, flathead catfish, carp, drum, river carpsucker, and paddle fish.