FISHERY BULLETIN: VOL. 81, NO. 3 



the immediate north in runs A and B and, to a lesser 

 extent, in runs C, D, and F. 



North of the patches the broad areas of uniform con- 

 centration were maintained and expanded by the 

 continued entry of leptocephali into the Gulf Stream. 



This region extended along the North American 

 coast to lat. 38°N, at which point it curved out into the 

 Atlantic. It was best represented by the 10" 3 con- 

 tours in runs A, C, D, and F. The pattern was similar 

 for run B, but the radial expansion of the main patch 



70 60 50 40 82 v 70 60 50 



FIGURE 8. — Concentration contours of American eel leptocephali after 270 d of drift (26 November). 



494 



