Abstract
In order to examine the influence to rise the temperature of water on the life, and to aware on the mortality to the highest temperature of water on these young fishes Salmo irideus (Rainbow trout), Salvelinus fontinalis (Brook trout), and Oncorhynchus masou (Brevoort) (Kizakimasu), at first these fishes are put in a water-tank, and then the temperature of water are rised leisurely, it's need 10-20 minutes to. rise the temperature of water 1°C, and keep up untill these fishes die.
The results were shown as follows:
(1). According to these species of fishes, the highest temperature of water of mortal were differenced namely Salmo irideus were extent at 25.6-31.6°, Oncorhynchus masou 28.7-31.0° and Salvelinus fontinalis 24.5-28.9°, and the greatest extremes of temperature of watere were on Salmo irideus (Tale 1 & Figl).
(2). Accrding to the extremes of livintng temperature of water of these parents of Salmo irideus, there were the difference of the bearing power of the young fish whish transplanted from these parents live (Tale 2, 4 & Fig 6).
