Table 6. — Results of analysis of covariance of morphometric character as a function of 

 eye-fork length. The statistical test is whether the relation is significantly different among 

 areas, (n.s. = not significant; * = 5% significance level; ** = Wo significance level). 



Character 



Weight 



Maximum body depth 

 Depth at vent 

 Length of pectoral fin 

 Length of pelvic fin 

 Snout to mandible length 

 Snout to eye length 

 Dorsal fin height 

 Length of maxillary 



Blue marlin 



Sailfish 



Striped 

 Male 



marlin 



Female 



Male 



Female 



Female 



n.s. 



n.s. 



n.s. 



** 



** 



— 



n.s. 



* 



** 



** 



— 



n.s. 



n.s. 



** 



** 



— 



n.s. 



n.s. 



** 



** 



n.s. 



n.s. 



n.s. 



n.s. 



** 



— 



n.s. 



n.s. 



** 



** 



— 



— 



* 



* 



** 



n.s. 



n.s. 



* 



* 



** 



n.s. 



n.s. 



n.s. 



n.s. 



n.s. 



eluding results for weight-length relations, results of 

 the statistical test of a = indicate that most of the 

 a's are significantly different from zero. This sug- 

 gests that growth of the body parts is allometric, or 

 the parts do not grow as a constant proportion to 

 body size, which is characteristic for most body 

 parts of fishes (Martin. 1949). 



Analysis of covariance was performed to test 

 whether the regressions differed between sampling 

 locations. No significant differences were found 



(Table 6). Samples from Buena Vista and Mazatlan 

 were therefore pooled and the regressions were re- 

 calculated (Table 7). 



SAILFISH 



A total of 81 1 sailfish was sampled at Buena Vista 

 and Mazatlan. Sampling at Buena Vista was in 

 1967-70 and at Mazatlan, only in 1967-69. More 

 fish, however, were sampled at Mazatlan than at 



Table 7. — Regression of morphometric character on eye-fork length (cm) for pooled (loca- 

 tions and sexes) samples of blue marlin and sailfish from the eastern Pacific. Weight-length 

 relation is based on log transformed data (log Y = a 4- £>log.Y); all other relations are based 

 on untransformed data (Y = a + bX). 



Character 



Range of length 



N 



Blue marlin 

 Weight (kg) 



Maximum body depth (cm) 

 Length of pectoral fin (cm) 

 Length of pelvic fin (cm) 

 Dorsal fin height (cm) 

 Length of maxillary (cm) 



Sailfish 

 Weight (kg) 



Maximum body depth (cm) 

 Depth at vent (cm) 

 Length of pectoral fin (cm) 

 Length of pelvic fin (cm) 

 Snout to mandible length (cm) 

 Snout to eye length (cm) 

 Dorsal fin height (cm) 

 Length of maxillary (cm) 



-5.690 



3.318 



154.0-265.1 



57 



-5.887 



0.245 



154.0-239.8 



14 



18.594 



0.163 



154.0-265.1 



35 



49.263 



-0.056 



154.0-242.2 



36 



17.129 



0.103 



154.0-265.1 



56 



12.366 



0.103 



154.0-265.1 



55 



-4.360 



2.628 



115.1-221.7 



802 



2.824 



0.150 



121.5-221.7 



239 



10.160 



0.073 



121.5-221.7 



239 



0.703 



0.211 



121.5-221.7 



279 



12.171 



0.274 



115.1-203.0 



529 



16.382 



0.099 



133.2-203.0 



196 



24.707 



0.207 



156.0-203.0 



34 



8.292 



0.202 



115.1-203.0 



559 



9.910 



0.110 



115.1-203.0 



553 



113 



