WLF 448: Fish & Wildlife Population Ecology
Lab Notes 14, Fall 2004

  Lab 14: Population Regulation Lab

(tables and figures)

Table 1. Annual estimates of the number (in thousands) of sockeye salmon harvested (seining + gill netting) from the Karluk River, Alaska.

Year Catch Year Catch Year Catch Year Catch
1812 59 1903 1064 1925 1319 1947 110
. . 1904 1639 1926 2384 1948 657
1883 189 1905 1788 1927 775 1949 450
1884 282 1906 3414 1928 1198 1950 504
1885 469 1907 2930 1929 381 1951 149
1886 646 1908 1608 1930 238 1952 219
1887 1005 1909 924 1931 867 1953 77
1888 2631 1910 1493 1932 771 . .
1889 3056 1911 1723 1933 1143 . .
1890 2580 1912 1245 1934 1399 . .
1891 2932 1913 868 1935 944 . .
1892 2140 1914 540 1936 1078 . .
1893 2198 1915 828 1937 1071 . .
1894 2638 1916 2232 1938 984 . .
1895 1344 1917 2350 1939 309 . .
1896 2070 1918 1120 1940 452 . .
1897 1635 1919 1105 1941 697 . .
1898 965 1920 1371 1942 507 . .
1899 830 1921 1642 1943 806 . .
1900 2074 1922 658 1944 641 . .
1901 3629 1923 728 1945 676 . .
1902 2715 1924 891 1946 228 . .

 

 

Table 2. Number of sockeye salmon allowed to travel upstream (= spawners), number harvested (= catch), and total number in the population (= spawners + catch). Note: all numbers are expressed in thousands.

Year Spawners Catch Total
1919 . 1090 .
1920 . 1369 .
1921 1500 1643 3143
1922 400 658 1058
1923 695 730 1425
1924 1063 891 1954
1925 1621 1323 2944
1926 2534 2386 4920
1927 872 715 1587
1928 1094 1001 2095
1929 901 227 1128
1930 1087 167 1254
1931 873 752 1625
1932 738 674 1412
1933 968 845 1813
1934 1450 919 2369
1935 876 655 1531
1936 1375 1078 2453
1937 1265 1071 2336
1938 1230 984 2214
1939 706 509 1215
1940 816 451 1267
1941 932 698 1630
1942 629 507 1136
1943 921 806 1727
1944 769 641 1410
1945 659 676 1335
1946 442 228 670
1947 485 110 595
1948 753 657 1410
1949 691 420 1111
Sum 24,546 19,690 44,236

Text Box: Karluk River  

 Figure 1. Total returning population of sockeye salmon (total = catch + spawners).

Figure 2. Sockeye salmon passing through weir per week.

Figure 3. Time diagram of life-history stages of sockeye salmon in the Karluk River drainage.

Revised: 29 November 2004