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<br />Table 5. Adult Colorado [ikeminnow 1986-1997IenQth-freQuency data laoe-class structure baseline) <br />Age-class 1 Total Length Numbers of fish In in each totallen th ranae bv vear2 <br />(vearsl Ranoe (mm) 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 <br /> 100-150 1 <br /> 150-200 1 3 <br /> 200-250 3 1 <br /> 250-300 1 2 3 <br /> 300-350 1 1 6 1 <br />5 350-400 2 1 2 3 3 1 3 2 <br />6 400-450 1 1 3 16 5 1 4 2 4 <br />7-8 450-500 3 1 1 1 3 5 12 12 1 5 3 <br />9-10 500-550 4 6 1 1 3 3 4 13 18 11 6 <br /> 550-600 1 1 1 2 2 5 13 12 10 <br /> 600-650 1 1 1 1 2 10 10 <br /> 650.700 1 3 2 1 7 <br /> 700-750 1 1 1 1 2 <br /> 750-800 1 <br /> 800-850 1 <br /> 850-900 1 <br /> 900-950 1 <br /> 950-1 000 1 <br />Sample Size (N = Sum of n)= 11 12 4 5 4 16 31 36 33 41 51 49 <br />Number of 'Age'-classes (S)= 5 7 4 5 4 9 7 8 5 8 9 11 <br />Mean Total Length3 (L)= 498 529 500 515 513 550 451 467 520 540 491 542 <br />Standard Deviation3 (STD)= 72 144 251 146 134 197 63 98 54 65 135 124 <br /> L+STD= 570 673 751 661 647 747 514 565 575 604 626 667 <br /> L -STD= 426 386 249 369 378 353 387 368 466 475 355 418 <br /> <br />1 Age-classes are based on average length of fish of this age. Individual variability in growth rates may blur age-class boundaries (see text). <br />2 Bold values of n indicate the probable age-length progression of the 1986 year-class from age 6 (1992) to age 11 (1997). It becomes more <br />difficun to differentiate older age-classes due to individual variability and slower overall growth rates as fish age. <br />3 Mean total length was calculated by taking the sum of the products of the mid-point of each length range time the number of fish (n) in each <br />length range, then dividing that sum by the total number of fish (N). Standard deviation was computed using n occurrences of each <br />corresponding mid-point value for a total of N values. <br /> <br />. <br /> <br />. <br /> <br />>-' <br />a <br />