Fishery bulletin of the Fish and Wildlife Service - NOAA
Fishery bulletin of the Fish and Wildlife Service - NOAA
Fishery bulletin of the Fish and Wildlife Service - NOAA
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WHITEFISH FISHERY OF LAKES HURON AND MICHIGAN 317<br />
was good agreement between conclusions as to <strong>the</strong> course <strong>of</strong> <strong>the</strong> fishery based on statistical<br />
data <strong>and</strong> on <strong>the</strong> testimony <strong>of</strong> <strong>the</strong> fishermen <strong>the</strong>mselves.<br />
WHITEFISH,FISHERY OF LAKE HURON, 1929-1939<br />
In part I attention was called to <strong>the</strong> general increase in <strong>the</strong> abundance <strong>and</strong> production<br />
<strong>of</strong> whitefish that occurred in <strong>the</strong> waters <strong>of</strong> <strong>the</strong> Great Lakes in <strong>the</strong> late 1920's<br />
<strong>and</strong> early 1930's. Emphasis was placed on <strong>the</strong> fact that <strong>the</strong> increase in yield in Michigan<br />
waters <strong>of</strong> Lake Huron was relatively much higher than in o<strong>the</strong>r waters. The<br />
average Michigan catch in Lake Huron in <strong>the</strong> two peak years, 1931 <strong>and</strong> 1932, was 3.67<br />
times <strong>the</strong> average annual production over a period <strong>of</strong> earlier years, <strong>and</strong> <strong>the</strong> years 1930,<br />
1933, 1934, <strong>and</strong> 1935 had yields well above normal, whereas in o<strong>the</strong>r waters <strong>the</strong> average<br />
annual productions during <strong>the</strong> recent maximum were only 1.26 to 2.86 times <strong>the</strong> earlier<br />
averages (p. 309). The excessive catch in Lake Huron was attributed'to <strong>the</strong> widespread<br />
use <strong>of</strong> <strong>the</strong> deep trap net in that lake. The detailed data that will be presented for <strong>the</strong><br />
six statistical districts in <strong>the</strong> State <strong>of</strong> Michigan waters <strong>of</strong> Lake Huron fully support this<br />
earlier position. In fact, <strong>the</strong> origin <strong>and</strong> expansion <strong>of</strong> <strong>the</strong> deep-trap-net fishery dominate<br />
<strong>the</strong> recent history <strong>of</strong> Michigan's whitefish fishery <strong>of</strong> Lake Huron so completely that a<br />
summary <strong>of</strong> <strong>the</strong> 1929-1939 statistics constitutes in reality little more than a study <strong>of</strong><br />
<strong>the</strong> effects <strong>of</strong> this new gear.<br />
The deep trap net was introduced into Lake Huron <strong>of</strong>f Alpena, Mich., in district<br />
H-2 in July 1928, <strong>and</strong> continued to be fished in <strong>the</strong> same area in 1929. The rapid<br />
expansion qf <strong>the</strong> deep-trap-net fishery got under way in 1930. In this year <strong>the</strong> net was<br />
fished extensively not only in <strong>the</strong> neighborhood <strong>of</strong> Alpena but also in H-l (especially<br />
in Hammond Bay) <strong>and</strong> in H-3 (mostly from Au Sable-Oscoda) ; a few deep trap nets<br />
were used also in 1930 on <strong>the</strong> "Middle Grounds" <strong>of</strong>f Saginaw Bay (H-4). No new statistical<br />
districts were added to <strong>the</strong> deep-trap-net grounds until 1932, in <strong>the</strong> latter part<br />
<strong>of</strong> which season <strong>the</strong> net was introduced into <strong>the</strong> waters <strong>of</strong> sou<strong>the</strong>rn Lake Huron <strong>of</strong>f<br />
Harbor Beach (H-5). The expansion into H-6 in 1933 completed <strong>the</strong> coverage <strong>of</strong> <strong>the</strong><br />
Michigan waters <strong>of</strong> <strong>the</strong> lake. This sequence makes <strong>the</strong> history <strong>of</strong> <strong>the</strong> deep-trap-net<br />
fishery, in a sense, discontinuous as <strong>the</strong> major "scene <strong>of</strong> action" shifted from year to<br />
year.<br />
FLUCTUATIONS IN THE PRODUCTION OF WHITEFISH<br />
IN LAKE HURON<br />
The production <strong>of</strong> whitefish in Lake Huron 22 increased phenomenally in 1930 <strong>and</strong><br />
1931 (table 3). The catch <strong>of</strong> 2,879,000 pounds in 1930 was nearly twice <strong>the</strong> 1929 yield<br />
<strong>of</strong> 1,456,000 pounds, <strong>and</strong> <strong>the</strong> 1931 production <strong>of</strong> 4,140,000 pounds represented an additional<br />
increase <strong>of</strong> 1,260,000 pounds above <strong>the</strong> 1930 level. The decline from <strong>the</strong> 1931<br />
yield was relatively insignificant in 1932 (decrease <strong>of</strong> 89,000 pounds). The reduction in<br />
<strong>the</strong> catch was large, however, in <strong>the</strong> succeeding years, averaging 719,000 pounds per year<br />
for <strong>the</strong> 3 years, 1933-1935, 446,000 pounds for <strong>the</strong> 3 years, 1936-1938, <strong>and</strong> 303,000<br />
pounds in 1939. Despite <strong>the</strong>se large decreases <strong>the</strong> catch did not return to an approximately<br />
normal level until 1936. The subsequent declines carried <strong>the</strong> production far<br />
below normal. The 1938 yield <strong>of</strong> 558,000 pounds was only a little above <strong>the</strong> lowest<br />
catch recorded for any previous year (555,000 pounds in 1900), <strong>and</strong> <strong>the</strong> 1939 production<br />
<strong>of</strong> only 255,000 pounds was less than half <strong>the</strong> previous all-time low. The 11-year<br />
period (1929-1939) saw, <strong>the</strong>refore, a remarkable cycle in <strong>the</strong> yield <strong>of</strong> whitefish in Lake<br />
Huron. From a nearly normal level in 1929 <strong>the</strong> catch increased suddenly to <strong>the</strong>, unprecedented<br />
height <strong>of</strong> more than 4 million pounds in 1931 <strong>and</strong> 1932 only to decline<br />
rapi.dly to an unprecedented low yield in 1939.<br />
Much <strong>of</strong> <strong>the</strong> increase to <strong>the</strong> 1931-1932 peak <strong>and</strong> <strong>of</strong> <strong>the</strong> high production in 1933-1935<br />
can be traced to <strong>the</strong> new gear, <strong>the</strong> deep trap net. The catch by this gear jumped from<br />
87,000 pounds in 1929 to 871,000 pounds in 1930 (a ten-fold increase), 2,080,000 pounds<br />
in 1931, <strong>and</strong> 2,764,000 pounds (<strong>the</strong> peak production for <strong>the</strong> gear) in 1932. The catch<br />
<strong>of</strong> deep trap nets did not fall below 2 million pounds in <strong>the</strong> 4 years, 1931-1934.<br />
n In this <strong>and</strong> <strong>the</strong> following section <strong>the</strong> terme, "Lake Huron" <strong>and</strong> "<strong>the</strong> entire lake," refer to <strong>the</strong> State <strong>of</strong> Michigan waters only.