. Bulletin. Natural history; Natural history. March, 1965 Starrett & Fbitz: Fishes of Lake Chautauqua 53 in eacli summer during our investiga- tion except that of 1954 (Table 30). The strength of the year-classes varied considerably (Fig. 27). Bailey & Harri- son (1945:69) noted variations in the strength of year-classes of yellow bass at Clear Lake, Iowa. We believe that our data on the an- glers' spring catch at Lake Chautauqua gave a fair representation of the age composition of the population of yellow bass of 2 years and older. Fig. 27, per- taining to the spring months of 1950- 1
. Bulletin. Natural history; Natural history. March, 1965 Starrett & Fbitz: Fishes of Lake Chautauqua 53 in eacli summer during our investiga- tion except that of 1954 (Table 30). The strength of the year-classes varied considerably (Fig. 27). Bailey & Harri- son (1945:69) noted variations in the strength of year-classes of yellow bass at Clear Lake, Iowa. We believe that our data on the an- glers' spring catch at Lake Chautauqua gave a fair representation of the age composition of the population of yellow bass of 2 years and older. Fig. 27, per- taining to the spring months of 1950- 1952, indicates that a fairly large year- class spawned in 1948. Members of this year-class appeared as 2-year-old fish in 1950 (Fig. 27). Our creel data (lengths, weights, and scales) on yel- low bass in the years 1953-1955 were too meager to reflect the fate of the 1948 brood after the fourth year. In 1953, another large spawn of yellow bass was produced. The graph for the spring of 1957 shows the relative strength of the 1953 brood as 4-year-old fish (Fig. 27). Members of the 1953 brood appear as 5-year-olds on the 1958 graph and as 6-year-olds on the 1959 graph. A .'ew yellow bass were found to have attained 7 years of age. White Bass: Age Composition of Catch.—Spawning success of white bass in Lake Chautauqua was quite sporadic in the years of our study. Young white bass ( inches total length) were collected in small num- bers from the lake in the summer months of 1950, 1951, 1952, 1954, and 1959. Only the 1950 and 1954 year- classes appeared in subsequent years as broods of even moderate size. Our tag- ging studies indicated that a large per- centage of the white bass over 1 year old moved out of the lake in periods of high water. Length-frequency distribu- tion graphs of white bass in the com- mercial seine hauls of September, 1951, 1952, and 1956 are presented in Fig. 28. In some years, white bass ( inches or more total length) were too scarce in the commerc
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