814 margarete gihr and georg pilleri 



Table 1 



Body length (cm) and body weight (kg) of Stenella styx and Delphinus delphis 



Species 



Sex 



weight 



length 



Sex 



weight 



length 







Kg 



cm 





Kg 



cm 



Stenella styx 





35 



147 



o 



42 



166 



Gray 



s 



51 



168 





71 



196 





n 



Q 



56 



159 



$ 



65 



180 





9 



63 



186 



$ 



64 



182 





9 



36 



155 



$ 



65 



178 





9 



62 



172 



$ 



45 



160 



Delphinus delphis 



& 



o 



58 



185 



O 



54 



178 



Linné 



o 



59 



159 



o 



50 



180 





9 



47 



162 



<? 



42 



161 





9 



40 



160 



i 



55 



175 





£ 



37 



153 



3 



48 



167 







61 



190 



$ 



59 



186 





$ 



52 



168 





50 



172 





<? 



65 



195 



cî 



66 



193 







50 



156 



c? 



43 



163 







52 



164 



s 



61 



176 







37 



153 



s 



43 



158 





? 



52 



172 





16 



111 



for foetuses and calves of Globicephala melaena Traill. Here, again, length was 

 measured in cm and weight in kg. The distribution of the individual values 

 obtained both for Stenella and for Delphinus showed, in a double logarithmic 

 scale, a relative linear arrangement. The régression line was calculated by the 

 calculating scheme of Riedwyl (1966): 



s 



Sample size 

 log body length (cm) 

 log body weight (kg) 

 Summation values 

 Auxiliary quantities 



N 



= x 



y 



Ix h 



Iy h Ixf, Ix t y h lyf 



S xy = 



Arithmetic mean 



x = 



X( Xi -xf 



£<x,— *)(* 



y) 



