112 BULLETIN OF THE BUREAU OF FISHERIES. 
part of the Bay before the establishing of this regulation. It shows that even before the 
institution of the close season there was a low period during the middle or last part of 
the summer. Nearly every curve for the 14 years which were analyzed exhibits the 
following characteristics: There are two high points, one occurring in the late spring, 
about May or June, and one in the fall, somewhere between the middle of September 
and the middle of November. In 7 of the 11 years for which complete records for the 
entire season were available the fall peak was higher than that for the spring. In 3 
aS 
Average number of barrels per man per day. 
Ee 
28 1 8 1522 29 6 15 2027 3 10 17241 8 152229 5 1219 | 8 7 1320273 1017 24 
Mar. Apr. May June Suly Aug. Sepk. Oct. Nov. 
Fic. 2.—Curve showing average daily catch of crabs per crabber for each week during the summer season of 1910. 
The vertical line represents the number of barrels; the horizontal, the weeks. 
years of the 14 the records are not complete, owing to the fact that the firm was closed 
during the fall months and that no crabs were purchased. During August or the first 
part of September there is a depression, often very marked. ‘These curves would indi- 
cate that crabs are most abundant in the late spring and in the fall, and that a slack 
season ensues in August or the early part of September. This is amply borne out by 
observation of the activities of the crabbers in that region. By the month of June the 
