The proportions of mycl-ophids in all three samples are high, with the myctophids 

 accounting for 53 percent to 67 percent of the species and 64 percent to 83 

 percent of the specimens. Specimens of Lepidophanes pyrsobolus are prominent 

 in all three samples, as are specimens of Notolychnus valdiviae In sample 8-Tl-A 

 and of Hygophum hygomi and Notoscopelus resplendens in sample 8-Tl-B, 



Tow 8-T3 sampled the ascending scattering layers at approximately 

 88 meters, which meant that this tow was also sampling in the lower half of the 

 daytime surface scattering layer before the evening ascent (Figure 12). 

 Unfortunately, gate 4 again malfunctioned resulting in only three samples. 

 However, Table IV shows clearly that sample 8-T3-C and D, during which 

 the main DSL ascent reached the level of the tow, had a much heavier collection 

 of fish than the two earlier samples. No myctophids were taken in the two 

 earlier samples except for a single larva, while in sample 8-T3-C and D 

 myctophids account for 70 percent of the species and 85 percent of the specimens. 

 Three species, all myctophids, were much more numerous than the other fish in 

 the sample: Lepidophanes pyrsobolus , Diogenichthys atlanticus and Ceratoscopelus 

 warmingi . From one to three small specimens of a trichiurid Diplosplnus multistriatus 

 were present in every sample of tows 8-Tl and 8-T3, indicating that these small 

 fish may not be part of the diurnal ly migrating layers. 



Tow 9-Tl sampled from 2330 - 0235 hours (local), during which time a 

 weak scattering layer descended gradually from below the level of the surface scat- 

 tering layer (Figure 13). Another weak, but deeper and narrower, scattering layer 

 descended at the same rate but had faded away by the time the net was in a position to 

 sample it. Thus, 9-Tl-A sampled below the descending scattering layer. The only 

 fish It contained were three specimens of a gempylid or snake mackeral, Neslarchus 

 nasutus , ranging from 245 to 258 mm In standard length. The erratic tow path during 

 this sample may be a reflection of the deep currents of the Gulf Stream. Sample 

 9-Tl-B coincided almost exactly to the depths encompassed by the descending 

 scattering layer but contained no fish other than two eel leptocephali and a 

 postlarval antennariid or frogfish. 



Sample 9-Tl-C and D from above the descending layer to the surface, 

 caught many more fish than the two earlier samples (Table IV), though the estimated 

 fish concentration is low compared to the heavy samples from station 8. Myctophids 

 accounted for 80 percent of the specimens in the sample, but only single individuals 

 were taken except for ten specimens of Lepidophanes guntheri. 



Tow 9-T2 sampled in the lower part of the surface scattering layer, 

 but may have been at the level of the main descending scattering layer for about 

 five minutes during the first part of sample 9-T2-A (Figure 14). As may be seen 

 in Table IV, this sample had the heaviest estimated fish concentration of the four 



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