FISHERY BULLETIN: VOL 75, NO. I 



'Hjort's stage; Bowers and Holliday (1961). 



TABLE 2. — Mean and range of female standard length, wet weight; ovary length and wet weight; and maximum egg 

 diameter for Pacific herring. Linear equation describes the regression of wet weights on lengths for both whole female fish 

 and left ovaries. Sample size = 59 females; 59 ovaries (spent females excluded). 



Female 



Standard length (X) 

 Benzene 



concentration Range Mean 



(ppb) (cm) (cm) 



Ovary (Stages lll-VI) 



Wet weight (Y) 

 Range 



(g) 



Total length (X) 



Wet weight (/) 



Max egg diameter 



Mean 



(g) 



Range 

 (cm) 



Mean 

 (cm) 



Range 



(g) 



Mean 



(g) 



Range 

 (mm) 



Mean 

 (mm) 



'Tests of significance between slopes (to) and elevations (a) of regressions showed no significant difference (0.100<P<0.250) between 

 concentrations (Snedecor and Cochran 1967:432-436). 



TABLE 3. — Analysis of covariance of wet weight on standard length of female, wet weight of ovary 

 on wet weight of female, and wet weight on total length of ovary for Pacific herring. Analysis of ripe 

 ovaries (Stage VI) only. Treatments: Concentrations (0 vs. 800 ppb); Days (1 to 4); 2x4 = 8 treat- 

 ment combinations x 5 observations per treatment combination = 40. 



Analysis of dependent variable (wet wt female) after adjustment for covanate (standard length female) 

 Source of variation 



df 



SS 



MS 



F ratio' 



Probability 



Between concentrations (C) 



(0 vs. 800 ppb) 

 Between days (D) 

 Interaction (CD) 

 Within cells 



1 



3 



3 



31 



5.2508 



675.2348 



485.9035 



6.721.2742 



5.2508 

 2250783 

 161.9678 

 2168153 



0.24 

 1.04 

 075 



P>0250 

 P>0.250 

 P>0.250 



NS 2 



NS 



NS 



Analysis of dependent variable (wet wt ovary) after adjustment for covanate (wet wt female) 



Source of variation 



Between concentrations (C) 



(0 vs. 800 ppb) 

 Between days (D) 

 Interaction (CD) 

 Within cells 



df 



SS 



MS 



F ratio 



Probability 



1 



3 



3 



31 



6940 



2.5351 



19.4057 



165.5181 



06940 

 8450 

 64686 

 53393 



0.13 

 0.16 

 1.21 



P>0250 

 P>0.250 

 P~>0.250 



NS 

 NS 

 NS 



Analysis of dependent variable (wet wt ovary) after adjustment for covanate (total length ovary) 



S ource of va riation df SS MS F ratio Probability 



Between concentrations (C) 



(0 vs 800 ppb) 

 Between days (D) 

 Interaction (CD) 

 Within cells 



'F 0.05=4.16, df = 1,31;F 0.05=2.91, df=3,31. 

 2 NS = not significant 



46 



