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REPORT OF BOARD OF FISH AND GAME COMMISSIONERS. 
become attached to slide and cover glass by their tails, and their 
swimming ceases within one minute. Occasionally milt taken from a 
male does not show active spermatozoa at first, but after being left in a 
dish exposed for half an hour they become active when placed in 
water. If first they are placed in normal salt solution (.05 per cent), 
they will become very active on being placed in water. The salt solution 
seems to have a stimulating effect. The spermatozoa are active in water 
ranging from the temperature of freezing up to 90 degrees Fahrenheit. 
They are most active at temperature of 68 degrees Fahrenheit. They 
are killed at temperature of 100 degrees—110 degrees Fahrenheit. At 
a lower temperature than 42 degrees they are very sluggish. It was 
found that milt left in a dish exposed to the air, at a temperature 
ranging between 54 degrees and 68 degrees Fahrenheit, showed active 
spermatozoa after twenty hours. 
We hope to demonstrate that striped bass eggs can be kept in an open 
dish and fertilized after several hours, as has been done with salmon 
and whitefish eggs, but all the lots of eggs saved for experiment 
happened to be from lots that turned out to be immature. 
FOOD OF ADULT STRIPED BASS. 
The food of the adult striped bass in the rivers is principally of carp, 
hardheads, and split-tails. Nearly all the fishermen claim that when 
the carp is plentiful it is their principal food. They even advance the 
theory that the bass are not so numerous in the San Joaquin because 
the carp are not so plentiful on the lower river, and they run up the 
Sacramento because of their great abundance in those waters. 
FOOD OF YOUNG STRIPED BASS. 
An examination of the stomachs of fifty young bass averaging 3 
inches in length, which were taken at “Morrison’s Bite” in Napa Creek 
on September 10, 1908, shows the following contents: Crustaceans, a 
species of Mysis, 30 per cent; of young shrimp, 15 per cent; of a species 
of Gammarus, 1 per cent; of an Isopod, 1 per cent, and 1 small crab. 
Marine worms or annelids, a species of Nereis, 45 per cent; of species 
not recognizable, 5 per cent; small fish, species not recognizable, 2 per 
cent. 
It will, therefore, be seen that on this feeding ground, at least, marine 
worms comprise 50 per cent of the food, crustaceans of marine species 
48 per cent, and small fish only 2 per cent. The young shrimp and 
young fish were taken from the stomachs of young bass of 3 to 4 inches 
in length and the other small crustaceans from the stomachs of speci¬ 
mens 3 inches and under in length, showing that the young bass begin 
feeding on the small species of crustaceans and worms, and as they 
grow in size are able to take the shrimp and young fish. 
