Table 1. -- Factor analysis results for prespawning striped bass. 
Proportion of variance in data base accounted for by different factors, 
or sets of variables. San Joaquin River prespawning females (n=157 
fish); 1978-1983. The names of factors indicate the major controlling 
variables in factor sets. 
PROPORTION OF VARIANCE 
FACTOR % ACCUMULATIVE % 
1 
AGE, WET WEIGHT 
10 
10 
2 
COLOR PATTERN-GENERAL 
9 
19 
3 
SEXUAL MATURITY 
8 
27 
4 
PETROLEUM HYDROCARBONS: 
(Gonad & Liver-o-Xylene) 
7 
34 
5 
YEAR 
6 
40 
6 
CHLORINATED HYDROCARBONS: 
(Gonad & Liver-PCB’s) 
5 
45 
7 
CHLORINATED HYDROCARBONS: 
(Gonad & Liver-DDT) 
5 
50 
8 
TIME, TEMPERTURE 
4 
54 
9 
PARASITES-CESTODE LESIONS 
4 
58 
10 
YEAR 
3 
61 
11 
METALS:Liver-(LSI) 
3 
64 
12 
PETROLEUM HYDROCARBONS: 
(Gonad-Ethylbenzene, m-Xylene) 
3 
67 
13 
SEXUAL MATURITY 
3 
70 
14 
PETROLEUM HYDROCARBONS: 
(Liver-Ethylbenzene, 
1,2-Dimethylcyclohexane) 
2 
72 
15 
BODY CONDITION 
2 
74 
16 
PETROLEUM HYDROCARBONS: 
2 
7 6 
(Liver-Benzene, m-Xylene, 
_ 1.2-Bimvlcyclohexane ) _ 
INHERENT FACTORS ENVIRONMENTAL FACTORS UNIDENTIFIED 
NATURAL FACTORS POLLUTANT FACTORS 
32%17%27% 24% 
FACTOR 
NO. FACTOR NAME 
88 
