Asynchronous bimodal stimulation during prenatal development elicits higher levels of behavioral and physiological arousal in precocial avian embryos than does unimodal sensory stimulation. To investigate whether the increased arousal associated with prenatal bimodal stimulation has enduring effects into postnatal development, bobwhite quail (Colinus virginianus) embryos received no supplementa...

--This study compares developmental changes in the behavior, morphology, and body composition of three species of birds with different types of development: Starling (Sturnus vulgaris) (altricial), Common Tern (Sterna hirundo) (semi-precocial), and Japanese Quail (Coturnix coturnix japonica) (precocial). The Starling grows four times and the tern, two and one-half times more rapidly than the qu...

The present study makes an investigation into expression of genes related to cardiac development in chicken, quail and chicken-quail hybrids during the early stage of embryogenesis. Real-time PCR was used to detect mRNA expressions of Nkx2-5, GATA4 and TBX5 in the heart of chicken, quail and chicken-quail hybrids embryos during the 3rd to 7th days of incubation. Results showed that NKX2-5 mRNA ...

The ex vivo culture of avian embryos is a technique for the long-term culturing of embryos outside of their own shell and shell membrane. It allows easy access to the developing embryos and embryo manipulation. The two-step system is widely applied when the culture is performed after oviposition. Japanese quail as well as bobwhite quail are used as models for avian safety assessment as recommen...

Cultured quail myocytes were much more resistant to H2O2 toxicity than cultured mouse myocytes. The intracellular concentration of glutathione ([GSH]i) and the activity of gamma-glutamylcysteine synthetase (gamma-GCS) in quail heart cells were about five and three times higher, respectively, than in mouse heart cells, although catalase and glutathione peroxidase (GSHpx) activity was similar in ...

Animals perceiving repeated aversive events can become chronically stressed. Chronic activation of the hypothalamic-pituitary-adrenal (HPA) axis can have deleterious consequences on physiological parameters (e.g. BW, blood chemistry) and behaviour (e.g. emotional reactivity, stereotypies, cognition). Environmental enrichment (EE) can be a mean to reduce animal stress and to improve welfare. The...

The present trial was conducted to investigate the effect of using bay leaf powder and its oil on male semen characteristics, female reproductive traits, plasma hormonal alteration hatchability local quails. results were summarized uses different levels (Laurel nobilis L.) as feed additives in quail diets significantly (P≤0.05) higher body weight, testis relative gonadosomatic index, size area ...

this study was conducted to evaluate the effect of camphor levels on performance, organ weight, testosterone and thyroid hormones, intestinal selective bacteria, and meat peroxidation of japanese quail. two-hundred 1-d chicks were allocated in 20 cages with five treatments and four replicates (10 chicks per each cage) using complete randomized block design. treatments were including: 0, 62.5, 1...

A total of one thousand and eighty (1080) unsexed day-old quail chicks with an average initial weight 7.68±0.39g were used in a feeding trial to determine the growth response fed iso-nitrogenous rations various dietary energy levels Nigerian (tropical) environment. Six (26% CP) diets containing 2500, 2600, 2700, 2800, 2900 3000 Kcal/kg ME complete randomized design, respectively for study. The ...