FUR-SEAL FISHERIES OF ALASKA, 1909. 33 
a steady decrease in rookery bulls, namely, that such reservation 
must equal at least 50 per cent of the adult bulls in existence at the 
time the reservation is first made. 
CHANGE IN HAREMS BY ROOKERIES. 
We have seen from the foregoing that an increase of 9 harems 
occurred on St. Paul Island and of 26 on St. George Island.” This 
increase represents a percentage of only eight-tenths of 1 per pent 
on St. Paul and of over 10 per cent on St. George. The counts dis- 
close an increase upon all the rookeries on St. George excepting one, 
and that one, Little East, is the same as in 1908, while on St. Paul 
only 1 of the 4 large rookeries (Gorbatch) shows any increase what- 
ever. With this single exception, such increase on St. Paul as did 
occur took place on the smaller rookeries. 
A count of the bulls on all rookeries in 1908 and 1909, with a state- 
ment of the changes occurring during the interval, follows: 
Count of Bulls on All Rookeries, 1908 and 1909. 
Rookery. 
Harem. 
Increase 
(+) or 
1908. 
1909. 
decrease 
(-)• 
St. Paul: 
Ardiguen 
8 
11 
+ 3 
-16 
Reef 
200 
184 
Ketovi 
42 
51 
+ 9 
Amphitheater 
6 
7 
+ 1 
Lukanin 
44 
41 
- 3 
Tolstoi 
88 
87 
— 1 
Toistoi Cliffs 
20 
25 
+ 5 
Lagoon 
13 
12 
— 1 
Northeast Point 
237 
229 
- 8 
Little Polavina 
16 
19 
+ 3 
Polavina Cliffs 
24 
23 
— 1 
Polavina 
36 
42 
+ 6 
Zapadni 
148 
147 
— 1 
Little Zapadni 
64 
62 
- 2 
Zapadni Reef 
10 
11 
+ 1 
Gorbatch Cliffs 
3 
2 
— 1 
Gorbatch 
103 
118 
+15 
St. George: 
Little East 
5 
5 
East Reef 
20 
25 
+ 5 
„ East Cliffs 
41 
42 
+ 1 
Staraya Artel 
41 
42 
+ 1 
Zapadni 
40 
44 
+ 4 
North 
94 
109 
+15 
This fact, that the rookeries on St. George Island show increase in 
bulls in a marked degree, is strongly corroborative of the tentative 
conclusion advanced by me in 1908, that the continued disturbance 
of seals in the water about St. Paul Island by the pelagic sealers has 
had the effect of driving off seals to the other island, where they suffer 
but little annoyance from the sealers. In 1908 the change in the 
habits of the bachelors in hauling on the Reef, where they were least 
disturbed, in preference to Northeast Point, where two-thirds of the 
