Topic
Coturnix
About: Coturnix is a research topic. Over the lifetime, 953 publications have been published within this topic receiving 23305 citations.
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TL;DR: This article showed that Japanese quail and White Pekin duck host jaw muscles acquire quail-like shape and attachment sites due to the presence of quail donor neural crest-derived skeletal and muscular connective tissues.
65 citations
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TL;DR: The date ingredient diets supported broiler weights and feed conversions comparable to or better than the control diet, and the quail breeder feed consumption decreased at the 30% date level; however in the second trial 24% dates supported normal intake.
64 citations
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01 Nov 1994-Journal of Comparative Physiology A-neuroethology Sensory Neural and Behavioral Physiology
TL;DR: The role of the pineal organ and the optic nerve in the circadian system of Japanese quail has been investigated in this article, which supports the hypothesis that the eyes are the loci of circadian pacemakers in quail that act via both neural and hormonal outputs.
Abstract: Japanese quail exhibit a robust circadian rhythm in body temperature. This rhythm is readily entrainable by 24 h light-dark (LD) cycles and persists under constant conditions. Because both the pineal organ and the eyes have been implicated as major components of the circadian system of birds, the role of these organs in generating the rhythm of body temperature was investigated. Pinealectomy, when performed alone, had little effect on the body temperature rhythm of quail either under LD or under constant darkness (DD). Most birds subjected to optic nerve section alone remained rhythmic in DD although the "robustness" of the rhythm was decreased, and 25% became arrhythmic. Birds subjected to both pinealectomy and optic nerve section behaved similarly to birds subjected to optic nerve section alone. However, complete eye removal, when performed alone or in combination with pinealectomy, caused all birds to become arrhythmic in DD. The data support the hypothesis that the eyes are the loci of circadian pacemakers in quail that act, via both neural and hormonal outputs, to preserve the integrity of (self-sustaining or damped) circadian oscillators located elsewhere.
63 citations
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TL;DR: It is shown that acute stress rapidly alters AA in the male and female brain and that these changes are specific to the brain nuclei and sex of the individual.
Abstract: The rapid and temporary suppression of reproductive behavior is often assumed to be an important feature of the adaptive acute stress response. However, how this suppression operates at the mechanistic level is poorly understood. The enzyme aromatase converts testosterone to estradiol in the brain to activate reproductive behavior in male Japanese quail (Coturnix japonica). The discovery of rapid and reversible modification of aromatase activity (AA) provides a potential mechanism for fast, stress-induced changes in behavior. We investigated the effects of acute stress on AA in both sexes by measuring enzyme activity in all aromatase-expressing brain nuclei before, during, and after 30 min of acute restraint stress. We show here that acute stress rapidly alters AA in the male and female brain and that these changes are specific to the brain nuclei and sex of the individual. Specifically, acute stress rapidly (5 min) increased AA in the male medial preoptic nucleus, a region controlling male reproductive behavior; in females, a similar increase was also observed, but it appeared delayed (15 min) and had smaller amplitude. In the ventromedial and tuberal hypothalamus, regions associated with female reproductive behavior, stress induced a quick and sustained decrease in AA in females, but in males, only a slight increase (ventromedial) or no change (tuberal) in AA was observed. Effects of acute stress on brain estrogen production, therefore, represent one potential way through which stress affects reproduction.
63 citations
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TL;DR: The data suggest that CLA may affect hatchability possibly by changing the fatty acid composition of the yolk, and the effects of dietary CLA on quail egg fatty acid content and hatchability.
63 citations