138 University of California Publications in Zoology [Vol. 13 



TABLE 12 



Distribution of Nyctiphanes at the Surface, by Two-Hour Periods Through the 



Day, Winter Months 



Time of 

 Day 



A.M. 



No. 



Total 



A 



of hauls: 

 Success. 

 B 



No. of hours: 

 Total Success. 

 C D 



No. of animals : 



Total Per hour 



E F 



Frequency : 



Haul Time 



G H 



1. 6- 8 



17 



2 



16.5 



1.25 



11 1.4 



12 7 



2. 8-10 



19 



4 



14.15 



3.17 



4 0.7 



21 22 



3. 10-12 



11 







7.9 















P.M. 















4. 12- 2 



10 







8 















5. 2- 4 



5 







4 















6. 4- 6 



7 







5.7 















7. 6- 8 



4 







4 















8. 8-10 



























9. 10-12 



























A.M. 















10. 12- 2 



























11. 2- 4 



2 







2.8 















12. 4- 6 



12 



7 



13.4 



7.1 



537 40. 



58 53 



the Kofoid net. These data are considered in table 13, which follows ; 

 it deals with winter hauls necessarily, since no animals were obtained 

 except in December (table 5). 



TABLE 13 



Distribution of NycUpnanes at Different Levels and at Different Times of Day 

 AS Shown by the Kofoid Net; "Winter Months 









6 A.M 



A 



[.-6 P.M. 



A 





2 A.M 



B 



[.-6 A.M 



A 







9- 



101- 



201- 



^ 



9- 



101- 



201- 







Depth in meters 



100 



200 



400 



401 + 



100 



200 



400 



401 + 







1 



2 



3 



4 



1 



2 



3 



4 



1. 



Total hauls 



50 



17 



13 



7 



3 















2. 



Successful hauls 



8 



3 



2 







3 















3. 



Total hours 



9. 



3.6 



2.9 



1.7 



.65 















4. 



Successful hours 



1.8 



0.7 



1. 







.65 















5. 



Total animals 



141 



156 



15 







351 















6. 



Animals per hour 



16. 



43. 



5.2 







542 











'. 



7. 



Haul frequency 



16 



17 



15 







100 















8. 



Time frequency 



20 



20 



35 







100 















The preceding table is similar to table 10 for Euphausia, and it is 

 of interest to compare the two. Nyctiphanes is shown to be more 

 abundant, during the day, at depths between 101 and 200 meters, 

 while Euphausia is more abundant below 200 meters (compare section 

 A, line 6 in tables 10 and 11). Nyctiphanes is much more abundant 



