VERTICAL MIGRATION 



245 



1-1- 



SCOLECITHRICELLA MINOR 



AVERAGE OF 



S STATIONS 10 STATIONS 



DAY NIGHT 



IOOO J 



MICROCALANUS PYGMAEU5 



AVERAGE OF 



6 STATIONS II STATIONS 



DAY NIGHT 



METRIDIA GERLACHEI 



AVERAGE OF 



S STATIONS 6 STAT IONS 



DAY NIGHT 



METRIDIA LUCEN5 



AVERAGE OF 

 4 STATIONS 10 STATIONS 

 DAY NIGHT 



10 



SCALE Imiliiiilinili 



20 



% PER 50m. DEPTH 



Fig. 115. Chart showing the vertical distribution of four deep-water Copepoda expressed as average per- 

 centages per 50 m. haul with the closing N 70 V nets used in a series of six hauls from 1000 m. to the surface 

 (1000-750 m., 750-500 m., 500-250 in., 250-100 m., 100-50 m., and 50-0 m.) at day and night stations. 



Table XL 



The depth distribution of Euphausia frigida furcilia as shown by the N 70 V 

 nets for stations of 500 m. depth and over 



32 



