1912] Esterly: Copepoda of the San Diego Region 293 
TABLE 19 
Distribution of Calanus at surface with regard to salinity 
A, 4-8 a.m. 
No. of hauls No. of hours No. of animals Frequency 
Salinity Total Success. Total Success. Total Perhour Haul Time 
1 2 3 4 5 6 i 8 
1. 33.604 or less 10 3 9.0 3.2 11 1.2 30 35 
2. 33.605-33.648 2 2 8 8 31 3.9 100 100 
3. 33.649 or more 11 5 6.4 3.8 689 108.0 45 59 
B. 8 a.m.-4 p. m 
1. 33.604 or less 6 2 4.3 AlzIL 11 2.6 33 25 
2. 33.605-33.648 5) 0 3.2 0.0 0 0.0 0 0 
8. 33.649 or more 9 3 7.0 23 37 5.3 33 33 
C. 4 p.m.-10 p.m 
1. 33.604 or less 11 9 6.0 5.4 4669 778.1 82 90 
2. 33.605-33.648 8 5 4.2 3.0 954 226.0 62 71 
3. 33.649 or more 7 4 44 36 293 665 57 82 
D. 10 p.m.-4 a.m. 
1. 33.604 or less 0 0 0.0 0.0 0 0.0 0 0 
2. 33.605-33.648 1 1 2.8 2.8 3825 1368.0 100 100 
3. 33.649 or more 2 2 5.7 5.7 378 61.3 100 100 
TABLE 20 
Summary of table 19 
Salinity aed Suenos etal“ Guecens otal’ Serene Sault ae 
A B Co D E F G H 
1. 33.604 or less 27 14 19.3 ONT. 4691° 271.0 82 50 
2. 33.605-33.648 16 fy At) 6.6 4810 437.2 50 60 
3. 33.649 or more 29 14 23.5 18.6 397 16.7 48 81 
In table 20, which deals with distribution in relation to 
salinity apart from time of day, we see that the highest hourly 
average (column F’) is when the salinity is between 33.605 and 
33.648 (line 2); the highest haul frequency is at a salinity 
33.604 or less and the highest time frequency at a salinity of 
33.649 or more. 
