QUAST: BODY WEIGHT, FAT, AND GONADS OF PACIFIC HERRING 



250 



200 — 



x 

 r- 

 O 



z 



UJ 



_l 



> 



a 

 o 



150 



100 — 



BL 



N 



54.855 + 0.6309 S 



= 234, R = 0.84 



OL^J I I I I I I I I I I I I I I I I I I I I L 



100 



200 300 400 



PROJECTED SCALE SIZE (S) IN MM 



500 



Figure 1.— Relationship between body length (BL) and projected scale size (S) of Pacific herring from Auke 



Bay, AK. 



in the back-calculations. When the estimates of 

 growth to ages 1 and 2 were compared for all 

 specimens, those from herring aged 2-4 at time of 

 capture (back-calculated over a span of 0-2 yr) had 

 slower-than-average growth, and those herring aged 

 4-7 (back-calculated over a span of 3-5 yr) had faster- 

 than-average growth (Fig. 2). Estimates for the 

 oldest herring (back-calculated over a span of >6 yr), 

 however, gave mixed results. The trends in fish of 

 5 yr and younger may have been caused by en- 

 vironmental influences because the trends occur in 

 sets of years (fish aged 2-4, when captured, spent 

 their first or second growth years in 1970-72, and 

 those aged 4-7 spent their first or second growth 

 years principally in 1966-69). 



GROWTH 



The average size-at-age data in my samples of 

 Pacific herring from the eastern Pacific and east- 

 ern Bering Sea and data from the literature for 

 those regions usually formed two stanzas on Wal- 

 ford graphs and inflected at ages 2 or 3 (see Figure 

 3 for examples). The data for Norwegian and Mur- 

 man stocks of Atlantic herring, Clupea harengus 

 harengus, (Svetovidov 1952) also formed two stan- 

 zas and intersected at age 2. Although the stanzas 

 for all of my back-calculated data from the eastern 

 Pacific Ocean intersected at age 2, stanzas for two 

 populations from California (data from Spratt 1981) 

 intersected at age 3, and a plot of Naumenko's 



707 



