262 
PACIFIC SCIENCE, Vol. XXII, April 1968 
TABLE 5 
Summary of One Factor Analysis of Variance of Measurements of Cyclops kolensis, 
Same Population as in Table 4 
ITEM 
SOURCE 
SUM OF 
SQUARES 
DEGREES 
FREEDOM 
MEAN 
SQUARE 
F VALUE 
Length of segment 
Main effect 
1921 
4 
72.58 
3.925** 
3 endopod leg 4 
Deviation 
513 
28 
18.49 
Total 
2434 
32 
Length outer spine 
Main effect 
2527 
4 
103.45 
6.239* 
endopod leg 4 
Deviation 
464 
28 
16.58 
Total 
2991 
32 
Length inner spine 
Main effect 
1053 
4 
39.85 
.637 
endopod leg 4 
Deviation 
1635 
28 
62.50 
Total 
2688 
32 
Length ramus 
Main effect 
8716 
4 
328.07 
2.75** 
Deviation 
3445 
29 
119.28 
Total 
12161 
33 
Length outer 
Main effect 
3197 
4 
127.63 
2.429 
terminal seta 
Deviation 
1528 
29 
52.54 
Total 
4725 
33 
Length inner 
Main effect 
9227 
4 
318.45 
1.598 
terminal seta 
Deviation 
5777 
29 
199.22 
Total 
15004 
33 
* Significant at .01 level. 
** Significant at .05 level. 
TABLE 6 
Ratios of Mean Measurements of Cyclops kolensis from Three Localities* 
ANEBODA, SWEDEN 
LAKE BAIKAL 
ANEBODA, SWEDEN 
VS 
vs 
vs 
GROSSER PLONER 
GROSSER PLONER 
item 
LAKE BAIKAL 
SEE, GERMANY 
SEE, GERMANY 
Length outer seta as % 
length ramus 
2.24* * 
2.04* 
* 
.598 
Length inner seta as % 
length ramus 
1.44 
6.61* 
* 
2.34** 
Insert, lateral seta % length 
ramus 
.578 
0 
—.142 
Length med. inner seta % length ramus 
.87 
18.45** 
—4.38 
Width furca as % length 
ramus 
1.26 
3.09* 
❖ 
.205 
Length inner seta as % outer 
-.353 
3.29* 
* 
3.73** 
Length inner med. seta as 
% 
inner seta 
— .33 
4 . 37 *: 
* 
2.46** 
Length outer med. seta as 
% 
inner med. 
.236 
— 1.61 
— 6 . 88 ** 
* Data from Lindberg 1957. 
** Significant at .05 level. 
(1961) further noted that the 4th and 5th 
thoracic segments of the Siberian animals were 
relatively much wider than those of other C. 
kolensis examined. 
ECOLOGY 
Rzoska (1932) indicated that biological 
characteristics and ecological differentiation as 
well as morphological features should be of help 
in working out the systematics of the Cyclopidae. 
Unfortunately, there does not appear to be as 
much information on the ecology of C. kolensis 
and C. vicinus as on their morphology. 
Apparently, C. kolensis is generally a cold 
water species. Kozminski (1933) reported that 
in Lake Wigry, Poland, C. kolensis is a dicyclic 
species with the maximum population occurring 
