15 



I— 



o 

 O 



10 



1 1 1 1 1 1 1 1 1 r- 



T 1 1 1 r- 



-I 1 1 1 1 r 



_L 



_L 



20 



40 60 80 



TRUNK LENGTH (MM.) 



100 



120 



Figure 9. — Relation of bcxly depth to tnink length in sailfish from the western Atlantic. 



Table .5. — Slatisties describing regressions of body parts on trunk length, or body length, for sailfish from the 



western Atlantic 



Ix, mean ot values of X; y, mean of values of Y; N, number of specimens; b, slope of regression line; a, Y-intercept of regression line; Sy.x, standard deviation 



from regression (standard error of estimate)] 



Independent variable X and specimen size ' 



Dependent variable Y 



Sy.x 



Trunk length: 



Small _ Head length.. 



Large _ do 



Small Snout length 



Large do.__ 



Small Eye diameter 



Large ..do 



Small Body depth 



Large do 



Small Pectoral fin length. 



Large do 



Small Pelvic fin length... 



Large do 



Small Pelvic fin-anal fin.. 



Large ...do 



Body length: 



Small Trunk length 



Large do 



> Small, 16.0-61.5 imn. trunk length; large, 64.5-126 mm. trunk length. 



186 



U.S. FISH AISTD WILDLIFE SERVICE 



