674 BULLETIN OF THE BUREAU OF FISHERIES, 
The second group of areas as arranged in table 17 includes the north shore 
of Lake Michigan, the west shore of Lake Huron from Mackinaw City to Port 
Huron, and the south shore (Michigan waters) of Lake Superior. In this group 
the intensity of the plant of whitefish fry per square mile varies from about 
5,000 to about 10,000. But two negative percentages appear in the table 
opposite these areas; these are both in passing from the first to the second 
period, and both are reversed in passing from the second to the third period, 
where they become positive. 
The third group of areas includes the north shore of Lake Ontario, the 
east or Canadian shore of Lake Huron, the north shore of Lake Superior, and 
Georgian Bay. The plant per unit area has been largest in Lake Ontario, but 
has not there exceeded 3,600 per square mile. It diminishes progressively in 
the order in which the areas are named above, and becomes practically nothing 
in Lake Superior and Georgian Bay. The percentage column shows no positive 
value, while the sum of the negative values is very large. 
TABLE 17.—SHOWING THE RELATIONSHIP OF THE AVERAGE PLANT OF WHITEFISH FRY PER UNIT AREA 
IN CERTAIN WATERS OF THE GREAT LAKES, TO THE AVERAGE CATCH IN THE SAME UNIT AREA FOR 
THREE FIVE-YEAR PERIODS. 
1892-1896. 
| Per cent of in- 
m ee (plus 
tch, pounds, | values) or de- 
Plant per = x ic : 
A . | per square crease (minus 
Whitefish areas, potency it \mile (to nearest values) of each 
Sead Io). period over the 
| preceding 
period. 
| 
[Manistee and btanktort. <5 o5025—222-cec enna aaa eS 3 87, 800 
ios Horie \(Cnadiat ee See aS ae a ee oe 21,900 
Lake Michigan (southeast shore) >--25-- 2250535 en ae eee 22,000 
ate Michipan (orto SuOte)) —— a= ae ae en a ee 9,000 
2 |*Gaketuron (west suore) © . 2 2a a ae Se Be 5,600 
1 |Lake Stiperior: (Gout shore) S2oSe~ soe Pan Oo eo eee oe see 4,600 
Lake Ontario (north shore) -_ 3,000 
Lake Huron (east shore) - -- I, 000 
3 ee Superior (north shore) 
Georgian Bay 
Mati stee andubramitorte sane 2 ome nn ao ene ee eee 58,900 1,690 + 318 
ei ueakke ore (Canadian) Sn 20 sea ea ee ee ee ee eee 28, 900 168 + 78 
(Lake Michigan (southeast 'shore)= 24-5. . 555 s2nn2 3-5-2 a= 6,700 96 = 43 
Lake Michigan (north shore) ----- 7,300 I, 200 + ar 
2 {rake Huron (west shore) - - 6,300 148 — 6 
Lake Superior (south shore) 9,200 490 — 44 
‘Lake Ontario: (north: shore)oo ~~ = ee eee a ee ees 3.500 175 — “x26 
ate (intro (east shore) _ 22 = a oe ne ee eee I, 200 310 — 43 
3 |\Dake Superior (north shore) Sas soa neo Peas eee eee nee 194 164 — 47 
LeVlorgsrthaal Sth Ai cle yes Ue ee See SS So Se ee Bs 152 166 70 
2,344 H + 28 
n 169 Be ain 
440 +350 
Lake. Michigan (north shore) oo20- 202-4 ao. ae eee eee I, 500 -.as 
2 fiake IpbivwassN QGestsieloas) Meee, oe ee eon ene Se ee ee ee 9, 160 +6 
Lake Superior! (sowth shore) 2 = == = so ee aoe 6, 400 500 + 2 
ake Oirtaro (norta SuOte) = = nese ee er ieee , 170 —- 2 
‘Lake Sturon (east shore) 2 = So= 5 ee a 350 - 1 
3 |\Lake Superior (north shore) _______--------------- 128 eae 
Georgian Bay 156 —- 6 
