254 Thirty-fourth Annual Meeting. 
Mr. Clark: The temperature was 35 degrees to 39 degrees. 
Mr. Bower: And in the St. Clair river they did not begin to 
spawn until over a month later. I have known pike-perch eggs 
to be taken there as late as the 5th or 7th of June. They are all 
through spawning by the 5th of May in Saginaw Bay. We al- 
ways get a very much higher percentage of fertilization in St. 
Clair river than in Saginaw Bay or anywhere else, as far as I 
know. 
In regard to the effect of low temperature on eggs, I remem- 
ber in 1893 we were conducting experiments as to retarding the 
development of eggs so as to make a shipment, if possible, for 
the World’s Fair in Chicago. We lowered the temperature with 
ice, and while I am not absolutely certain as to the temperature, 
but my memory is that we reduced it to 38 degrees. JI am speak- 
ing now of the green eggs; and it was fatal to nearly all of 
them. They did not survive a temperature of 38 degrees. We 
made a number of experiments and found that we could not 
successfully retard them; and I do not believe you can success- 
fully retard the development of any fish eggs very much below 
the normal. I think it is very injurious at least to have the 
development of the eggs arrested. I believe that is one of the 
causes of the poor eggs that were taken under Mr. Clark’s 
supervision last spring. I was at the hatchery frequently when 
the eggs were received, when different lots of eggs came in while 
the water temperature was 45 degrees, later falling to 39 de- 
grees, and hovering about there for several days. I do not be- 
lieve when the development has started that it can be arrested 
for any length of time without more or less injury. It must go 
forward at a greater or less rate, and when you arrest the devel- 
opment or check it entirely, as must have been the case, or nearly 
so at least, when the temperature dropped from 45 to 39 degrees, 
I believe it killed a good share of the eggs. 
Mr. Lydell: What percentage did Mr. Fullerton get in his 
hatching ? 
Mr. Fullerton: We had 90 per cent hatched in the sample, 
roughly. We had 49 per cent in the general hatching. 
Mr. Lydell That is a big percentage. 
ol ene 
