Table 5. — Regression of morphometric character on eye-fork length (cm) for blue marlin 

 from the eastern Pacific. Weight-length relation is based on log transformed data (log Y = a 

 + blogX); all other relations are based on untransformed data (Y = a + bX). Data are for 

 females. (* = 5% significance level; ** = 1% significance level). 



SAILFISH 



>- 30 

 O 



z 



UJ 

 3 20 



O 

 111 

 IE 10 



-rn — I — n — i — n — i — rn — i — i — n — i i i — i n i r 



Mazatlan 



N X 

 — M 341 171.2 

 F 371 175.4 



•f->-i 



Buena Vista 



-M 28 168.0 

 •F 71 1794 



_] I I L ^'T^^j . 



100 110 no 130 140 ISO 160 170 ISO 190 200 210 

 105 115 125 135 145 155 165 175 185 195 205 215 



EYE-FORK LENGTH (cm) 



Figure 2. — Length frequency of sailfish sampled in this 

 study. 



-1 1 1 1 1 1 1 1 1 1 1 1 I I I I r- 



FEMALES(»)^'' 



_l I I L. 



_l I I 1_ 



.jM-»-»^ 



DORSAL HEIGHT 



FEMALES (•) 

 N.274 



J I I I L_ 



_l I \ I I 1- 



100 130 140 160 ISO 200 220 240 260 



EYE-FORK LENGTH (cm) 



Figure 3. — Weight and dorsal height as a function of eye- 

 fork length of sailfish from the eastern North Pacific. 



Samples from both locations consisted of only 

 females. We have no adequate explanation for this 

 phenomenon; however, we note that in the central 

 Pacific, which is west of our sampling area, more 

 males than females are generally caught in the sport 

 fishery (Strasburg, 1969). In the longline fishery sex 

 ratios vary greatly both temporally and spatially 

 (Kume and Joseph, 1969). 



Regressions of each of the characters as a func- 

 tion of eye- fork length are shown in Table 5. Ex- 



112 



