FISHERIES IN MICHIGAN WATERS OF GREEN BAY 



9 



Table 4. — Production in the commercial fisheries of Green Bay, by species, t929-49 



[In thousands of pounds] 



i Includes chubs, or ciscoes (Coregonus spp.). carp (Cvprinus carpio), round whiteflsh, burbot (Lota lota), bullheads, catfish, northern pike (Esox lucius), 

 saugers. Iongnose suckers (Catostomus catostomus), sheepsbead, or freshwater drum (Aplodinotus grunniens), white bass (Moroni chrysops), rock bass (A mbloplites 

 rupestris), bowfln (Amia calm) , and garfish (probably Lepisostcut ossein). 



3 Less than 500 pounds. 



Table 5. — Percentage composition of the catch in the 

 commercial fisheries of Green Bay, by species, 1929-49 



Catch records for the principal species in the 

 individual years reveal a wide range of fluctuation 

 in the take of all species and a strong tendency 

 toward cyclic fluctuations in some. The trends of 

 production for the different kinds and for the total 



catch are summarized briefly in the paragraphs 

 that follow. > 



Lake trout: After increasing from 182,000 

 pounds in 1929 to 220,000 pounds in 1931, the take 

 declined to a low of 72,000 pounds in 1934, rose to 

 a second peak of 248,000 pounds in 1938, declined 

 again (except for an irregularity in 1943) to a 

 minimum of 11,000 pounds in 1946, jumped to 

 178,000 pounds in 1948, and dropped to 149,000 

 pounds in 1949.* (See fig. 9.) 



Whiteflsh : Production exceeded a million 

 pounds in each of the 3 years 1929-31, but from the 

 high figure of 1,195,000 pounds in 1931 decreased 

 (with an irregularity in 1934) to the 21-year min- 

 imum of 90,000 pounds in 1936 (fig. 10). A re- 

 covery to the relatively low peak of 354,000 pounds 

 in 1938 was followed by another decline to 93,000 

 pounds in 1942. Successive increases in each of 

 the next 6 years carried the take to the all-time 

 recorded high of 3,066,000 pounds in 1948. The 

 catch dropped to 2,263,000 pounds in 1949. 



* See Hile, Eschmeyer, and Lunger (1951a) for a discussion of 

 the cause of the sharp recovery in the production of lake trout in 

 1948 and 1949. 



