FISHERY Bl'LLKTIN; VOL. «7, NO. 1 



E 

 E 



o 



6.200 

 6.100 

 6.000 

 5.900 

 5.800 

 5.700 

 5.600 

 5.500 

 5.400 

 5.300 



8.500 8.600 8.700 8.800 8.900 9.000 9.100 9.200 

 log (Otolith Length) (/xm) 



Figure 1.— Regression of the natural logarithm of FL on the log of otolith length (OL) (focus to distal 



margin of postrostrum). 



log(FL) = -3.783 + 1.074 log(OL), 



with r~ = 0.76 and standard errors for the slope 

 and intercept equal to 0.0634 and 0.5665, respec- 

 tively. 

 The sagittae of gindai display microstructure (Fig. 



2) typical of daily increments observed in other 

 studies (Dunkelberger et al. 1980; Tanaka et al. 

 1981; Watabe et al. 1982). Light incremental zones 

 and dark discontinuous zones are clearly visible in 

 the photomicrograph. One daily growth increment 

 is composed of the bipartite combination of a single 



I to focus 

 < 2160 pm  



~1 



lo oooooooo 

 )« 78um 



Figure 2.— Photomicrograph of a sectioned gindai otolith showing increment microstructure. The 

 10 daily increments in a short 78 ym segment are enumerated and increment width, i.e., otolith growth 

 rate, is calculated (7.80 (jm/d). The distance to the focus is also shown (2,160 jim). 



