The dopaminergic system and aggression in laying hens
نویسندگان
چکیده
منابع مشابه
Erysipelothrix rhusiopathiae in Laying Hens
The bacterium Erysipelothrix rhusiopathiae can infect a wide range of mammals (including humans) and birds. Disease outbreaks (erysipelas) have been considered unusual in chickens internationally, but outbreaks with high mortality and egg production losses have been diagnosed in Swedish laying hen flocks every year since 1998. Different aspects of E. rhusiopathiae infection in chickens were exa...
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A bulk of studies on the assay of gonadotrophic hormone content of the anterior pituitary from the animals in various reproductive conditions has been done. Riley and Fraps(1942b) assayed pituitary glands from chickens in various reproductive stages, judging the gonadotrophic potency by the increment of uterine weights of immature mice, and concluded that glands from non-laying hens produced a ...
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In this experiment 240 Hy-Line (W-36) laying hens from 65 to 75 weeks distributed in 5 treatments and 4 replicates (12 birds per replicate) in a completely randomized design were used. The amounts of watermelon skin meal (WSM) used to set the treatments were 0, 0.5, 1, 1.5 and 2% in 1 to 5 experimental groups. The results showed that using WSM up to 2% significantly improved the performance and...
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Epilepsy is accompanied with a strong change in neuronal activity not only in excitatory (glutamatergic) and inhibitory (GABAergic) neurotransmission, but also in neuromodulatory agents. Dopaminergic system, as an important neuromodulatory system of the brain, has significant effect on neuronal excitability. In addition, this system undergoes many changes in epileptic brain. Understanding the e...
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The objective of this study was to compare the performance, egg quality, and microbial contamination of egg shells from hens maintained in different housing systems, such as conventional and enriched cages, litter, and aviaries. The housing system significantly (P < 0.001) influenced the performance characteristics. The highest egg production, lowest daily feed consumption, and feed conversion ...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 2011
ISSN: 0032-5791
DOI: 10.3382/ps.2011-01513