internal-wave-mediated larval transport hypothesis 

 outlined in the introduction can be made. 



The distribution of organisms followed a pattern 

 similar to that of Sargassum floats (Tables 1, 2, 4). 

 In the tows from internal waves oriented perpen- 



FISHKRY HI.'LLETIN: VOL. 8t;, NO. 4 



dicular to shore there was only one instance in which 

 the density of an organism was significantly higher 

 in the convergence than the divergence zone (total 

 larval fish, 14 July 1985, Table 1) indicating that 

 these internal waves were not transporting larvae. 



Table 2. — The density (mean no. /1 00 m + SE) of invertebrates and Sargassum floats in front of tfie set of inter- 

 nal waves, tfie weighited average over thie internal waves, in tfie internal wave slick (convergence zone), tfie rippled 

 water between slicks (divergence zone), and befiind tfie internal waves. Significance compares tfie density between 

 tfiese samples using a Wilcoxon's two-sample test. 



'Wilcoxon's two-sample test (Sokal and Rohlf 1969). • = P < 0.05. 



^Weighted average density over an internal wave assuming a 30 m wide slick and a 100 m wide ripples. Internal wave 

 no./m^ X 30 m^) + (ripples no./m^ x 100 m2)/130 m^) x 100. 



[(slick 



Table 3. — Comparison of tfie density of various types of megalopae and larval fisfi caugfit in neuston, oblique, and 



bottom plankton tows. 



'Juvenile or late postflexion stages only. 



708 



