Table 2. Year factor; ranked differences among years in inherent 
characteristics, environmental variables and condition of striped bass. 
Based on factor analyses of prespawning female striped bass collected from 
April to June; San Joaquin River. Loadings on factors greater than or 
equal to 0.30. Ranked from highest (1) to lowest (7) total mean values. 
NS = not sampled; NM = sampled, but not measured. 
YEAR1 1978 1979 1980 1981 1982 1983 19842 
<N) (59) (42) (21) (12) ( 7) (16) (21) 
VARIABLE - - - - - - - 
Inherent Factors 
Age 
2 
4 
7 
1 
3 
6 
5 
Color Pattern 
6 
3 
1 
5 
4 
2 
2 
(Stripe Breakage) 
(8.5) 
(9.9) 
(10.5) 
(9.0) 
(9.1) 
(10.1) 
(10.1 
Environmental Factors 
Outflow 
4 
5 
3 
5 
2 
1 
? 
Diversion 
2 
1 
2 
1 
3 
4 
? 
Petroleum HC- 
Monocyclic Aromatics; 
Gonad 
4 
2 
5 
1 
6 
3 
NM 
Liver 
Petroleum HC- 
3 
5 
6 
1 
4 
2 
6 
Alicyclic hexanes 
Gonad 
3 
2 
5 
3 
5 
1 
5 
Liver 
3 
2 
5 
4 
5 
1 
5 
Metals-Gonad 
Copper 
1 
NS 
3 
2 
NM 
NM 
NM 
Zinc 
2 
NS 
3 
1 
NM 
NM 
NM 
Metals-Liver 
Copper 
NS 
NS 
3 
2 
NM 
NM 
1 
Zinc 
NS 
NS 
3 
2 
NM 
NM 
1 
Cadmium 
NS 
NS 
NS 
2 
NM 
NM 
1 
Chromium 
NS 
NS 
NS 
1 
NM 
NM 
2 
Mercury 
NS 
NS 
NS 
1 
NM 
NM 
2 
Selenium 
NS 
NS 
NS 
2 
NM 
NM 
1 
Parasites 
Tapeworm Larvae 
6 
5 
2 
6 
1 
4 
3 
Tapeworm Lesions 
4 
1 
3 
2 
5 
1 
4 
Tapeworm Rafts 
6 
1 
4 
5 
6 
3 
2 
Total Parasite3 
Severity 
2 
2 
5 
4 
1 
4 
3 
Condition Factors 
♦Egg Resorption 
1 
2 
4 
2 
6 
3 
5 
(More resorbed eggs and 
ovaries 
and abnormalities 
, less 
delayed 
maturation). 
1 Sample sizes in 
1981 
and 1982 
were small because of reduced populatic 
size of prespawning adults. 
2 Some outflow and diversion data 
3 All types of parasites and host 
not available, 
reactions. 
89 
