Effects of low selenium diet on the behavioral patterns and some constituents of blood in laying hens.

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This study was done to investigate the effects of low selenium diet on the behavioral patterns and some chemical constituents of the blood in laying hens. The relationships between the behavioral patterns and the blood constituents of the laying hens were also studied.Twelve laying hens, 76 weeks old, were used. The hens were fed a control diet during the first 2 weeks, after which they were divided into two groups of 6 hens each. One group was fed a low-selenium diet and the other was fed the control diet during the next 4 weeks. Changes in the diurnal patterns of the behavior of the hens were recorded with VTR for 3 days during the control diet and for 3 days periods during weeks 3 and 4 after the start of the low-selenium diet. The changes in serum constituents were also measured.On the low-selenium diet, the proportion of time spent for feed intake and the feed intake per minute tended to increase and the time spent pecking at feed per day increased significantly. The proportion of time spent pecking other than at feed decreased with this diet. Disturbed behavior decreased and the preening increased significantly with this diet.Triglycerides and glucose in the serum decreased and both total cholesterol and HDL-cholesterol in the serum increased significantly with the low-selenium diet.
日本家禽学会の論文