Diurnal variations in the diet of 0 to 3 years old Atlantic salmon Salmo salar L. under semiarctic summer conditions in the Alta River, Northern Norway
The stomach contents Optics of 0 to 3 year old salmon were investigated throughout a single 20 hour period in each of July, August and September 1981.There was no marked diurnal variation in stomach content of fry, while that of parr indicated nocturnal maxima in all three months.In July and August there was a significant increase from evening to n