182 
that we have definite clues to the answers 
of the vital questions, and it but remains 
for a more extended study to corroborate 
and substantiate facts which we have con- 
cerning the age, rate of growth, migra- 
tion and spawning. A complete report 
of findings will be published by the fish- 
eries research laboratory at an early date. 
Of course large questions of yearly 
fluctuations in abundance and sizes, with 
their important bearing on depletion, can 
be comprehended in the results of 
one season’s data, but the data taken 
this last season are invaluable as the first 
of a series of consistently comparable 
scientific observations of each season’s 
catch, without which nothing concerning 
depletion can be detected before the harm 
is already done. It now remains for con- 
tinuance of this study to solve all of the 
problems concerned, and insure’ the 
not 
CALIFORNIA FISH AND GAME. 
perpetuity of our great resource, through 
the adoption of intelligent conservational 
measures. OFLES- Ss 
LARGE TUNA. 
A large proportion of the blue-fin tuna 
caught during the month of August this 
year was of unusually large size. <A six- 
ton load of excessively large ones was 
brought in to San Pedro by the boat 
“Little Perina” on August 16. The fish 
averaged 1183 pounds, the largest tuna 
weighing 182 pounds and measuring five 
and a half feet in length, and the smallest 
measuring over four and a half feet in 
length. The average weight of tuna, and 
the size most convenient to handle, varies 
around 30 or 40 pounds. The fishermen 
complain of much damage to their nets 
by the large tuna, the meshes not being 
strong enough to withstand the assaults 
of these monsters. OURS: 
LIFE HISTORY NOTES. 
BAND-TAILED PIGEON NESTS IN SE- 
QUOIA NATIONAL FOREST. 
On September 1, 1920, Guard Arnold 
and myself, while working on the head 
waters of Deer Creek, ‘Section 85, T. 
S., R. 31 E., M. D. M., at an elevation 
of approximately 6500 feet, discovered 
the nest of a band-tailed pigeon, Columba 
fasciata fasciata. 
The nest consisted of a few small dry 
fir limbs and twigs about 10 feet from 
the ground in a dogwood tree. The nest 
was so rudimentary that it did not seem 
possible that it could be a nest at all. 
On it was one small squab about one- 
fourth the size of the parent bird. It was 
naked except for a few sparse reddish- 
brown hairs on the head and back. We 
saw eight adult birds near where we 
found the nest and they acted as if they 
had nests near by. W. EF... DERBY. 
» 
Peas 
LARGE MACKINAW CAUGHT 
DONNER LAKE. 
On July 10, 1920, Mr. J. C. Purdy of 
Sacramento, California, caught a fifteen- 
and-a-half-pound mackinaw trout in 
Donner Lake. This large fish was caught 
with a trolling tackle. The mackinaw 
trout was first planted in Lake Tahoe in 
1895 and a year later in Donner and 
other nearby lakes after the successful 
hatching of a shipment of eggs. Although 
IN 
fish of this species are occasionally caught 
in lakes of the Truckee Basin, the mack- 
inaw, or Great Lakes trout as it is some- 
times called, has never thrived to the 
extent expected when introduced into this 
part of the country. 
Mackinaw trout caught by 
Fic. 47. 
J. C. Purdy, in Donner Lake, Truckee, 
California. 
