RALSTON AND MIYAMOTO: OTOLITH INCREMENTS OF HAWAIIAN SNAPPER 



Rostrum lanteriorl n«...«i n„ 



Dorsal Dome 



Post rost rum 

 I posterior I 



FIGURE 1. — Schematic of an otolith from Pristipomoides filamentosus with specific 

 points of reference discussed in the text. 



Figure 2. — Photomicrograph through the nuclear core region of an otolith from Pristipomoides filamentosus. Note increments become com- 

 pressed in this area 



calibrated ocular micrometer (Fig. 1). Readings were 

 then made at selected points along the postrostral 

 growth axis, wherever increment microstructure was 

 clearly viewed. At such locations the average width of 

 increments was determined by counting the number 



of increments visible {x — 15.95, SD= 11.24) and by 

 measuring the radial length of the short segment in 

 which the increments were observed. In addition, the 

 distance between the midpoint of the sample region 

 and the otolith focus (^) was measured along the 



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