scholarly journals Search for QTL affecting the shape of the egg laying curve of the Japanese quail

BMC Genetics ◽  
2006 ◽  
Vol 7 (1) ◽  
Author(s):  
Francis Minvielle ◽  
Boniface B Kayang ◽  
Miho Inoue-Murayama ◽  
Mitsuru Miwa ◽  
Alain Vignal ◽  
...  
Keyword(s):  
Japanese Quail ◽  
Egg Laying

scholarly journals Anatomical and histological changes in the oviducts of Japanese quail, Coturnix japonica, after embryonic exposure to ethynyloestradiol

Reproduction ◽  
2001 ◽  
pp. 155-165 ◽  
Author(s):  
C Berg ◽  
L Holm ◽  
I Brandt ◽  
B Brunstrom
Keyword(s):  
Japanese Quail ◽  
Egg Laying ◽  
Coturnix Japonica ◽  
In Ovo ◽  
Histological Changes ◽  
Bird Populations ◽  
Embryonic Exposure ◽  
Exogenous Oestrogen ◽  
Tubular Gland ◽  
Sexually Mature

Oestrogen is needed for normal oviductal development in female birds, but excessive early exposure to oestrogen can cause oviductal abnormalities and impair egg-laying ability. In this study, the anatomical and histological effects of in ovo exposure to the synthetic oestrogen ethynyloestradiol on the oviducts of immature and adult female Japanese quail, Coturnix japonica, were investigated. A series of abnormalities was observed after injection of ethynyloestradiol (2 or 20 ng g(-1) egg) into the yolk on day 3 of incubation. Ethynyloestradiol induced precocious differentiation of the luminal epithelium and tubular glands in immature chicks. Right-side oviduct retention occurred at all the ages studied, whereas certain other effects were not evident until sexual maturity. The left oviduct was reduced in size and tubular gland density in the uterus (shell gland) was reduced in sexually mature birds that had been treated with ethynyloestradiol. The utero-vaginal junction was longer than in control birds and had a higher tubular gland density. The epithelial cells in the magnum were taller in birds treated with ethynyloestradiol. Embryonic exposure to the environmental contaminant ethynyloestradiol may cause persisting structural malformations in oviducts of quails, which can impair fertility. As oviductal malformations are indicative of embryonic exposure to exogenous oestrogen, they are potentially useful as biomarkers of xenooestrogen exposure in wild bird populations.

scholarly journals Lipid sources in diets for egg-laying japanese quail: performance and egg quality

2016 ◽  
Vol 38 (3) ◽  
pp. 281 ◽  
Author(s):  
Letícia Abaker Bertipaglia ◽  
Márcia Izumi Sakamoto ◽  
Liandra Maria Abaker Bertipaglia ◽  
Gabriel Maurício Peruca de Melo
Keyword(s):  
Japanese Quail ◽  
Alternative Energy ◽  
Egg Quality ◽  
Grape Seed ◽  
Egg Laying ◽  
Production Performance ◽  
Animal Origin ◽  
Total Period ◽  
Randomized Design ◽  
Grape Seed Oil

This study evaluated the effect of using lipid sources of plant and animal origin in diets for Japanese quail (Coturnix coturnix japonica) on production performance and internal egg quality. Japanese quails (n = 160) were distributed in a completely randomized design with four treatments and eight replications of five birds each. Lipid sources evaluated were: soybean oil, from poultry slaughterhouse, fish waste and grape seed. The characteristics of performance and internal egg quality were measured every 21 days for a total period of 84 days. Data were subjected to analysis of variance and the means were compared by Tukey’s test. There was no effect of treatments on the production performance of birds, except for feed intake, which was higher for birds fed grape seed oil in the diet. Lipid sources evaluated had no influence on the internal egg quality. It can be concluded that the lipid sources evaluated here in can be used as alternative energy in feed for laying quails, without affecting the performance and internal egg quality. 

Vitamin D metabolism: physiological regulation in egg-laying Japanese quail

1976 ◽  
Vol 230 (6) ◽  
pp. 1609-1615 ◽  
Author(s):  
AD Kenny
Keyword(s):  
Japanese Quail ◽  
Vitamin D3 ◽  
Physiological State ◽  
Reproductive Period ◽  
Egg Laying ◽  
Ovulatory Cycle ◽  
Vitamin D Metabolism ◽  
Dihydroxyvitamin D3 ◽  
Enhanced Production ◽  
Egg Shell

Homogenates of kidney removed from reproductivity active female Japanese quail were incubated with tritiated 25-hydroxyvitamin D3, and the metabolites were extracted and identified by chromatographic methods. Kidneys removed from birds with and without an egg in the oviduct revealed that ovulation results in enhanced production of 1, 25-dihydroxyvitamin D3, the active hormonal form of vitamin D3. Further examination of this phenomenon in relation to the ovulatory cycle revealed that 1, 25-dihydroxy-vitamin D3 production is enhanced throughout the 24 h following ovulation. Particularly important is the finding that its synthesis is already enhanced during the first 6 h after ovulation, at a time before any calcification of the egg shell begins. If, following oviposition, no ovulation occurs, 1, 25-dihydroxy-vitamin D3 production decreases rapidly and significantly within the first 6 h following oviposition. This study has revealed for the first time a physiological state, namely the reproductive period in the female bird, in which endogenous control over 1, 25-dihydroxyvitamin D3 production is exhibited without any previous manipulation, dietary or otherwise, of the animals.

scholarly journals Seasonal changes in plasma retinol-binding holoprotein concentration in japanese quail (Conturnix coturnix japonica)

1980 ◽  
Vol 43 (2) ◽  
pp. 357-366 ◽  
Author(s):  
J. Glover ◽  
D. J. Heaf ◽  
Suzanne Large
Keyword(s):  
Vitamin A ◽  
Japanese Quail ◽  
Seasonal Changes ◽  
Late Summer ◽  
Hormonal Control ◽  
Egg Laying ◽  
Coturnix Japonica ◽  
Mean Values ◽  
Natural Lighting ◽  
Plasma Retinol

1. Seasonal changes in retinol-binding holoprotein (holoRBP) concentration in plasma of group of male and female Japanese quail (Coturnix coturnix japonica) were examined over 18 months.2. In Expts 1 and 2 the birds were maintained under natural lighting conditions and in Expt 3 under artificial-light photoperiods corresponding to the changing daylength at 56° N latitude. All groups were at 18–20° and received Superlayers' (Rank Hovis McDougall) pellet diet.3. The mean plasma holoRBP concentration in all groups changed in an annual cycle with minimal values in September–October and maximal values in February–April, when daylength or light photoperiod increased to more than 10 h.4. The group mean values in the female cycle change 2- to 3-fold from 50–100 μg/ml in late summer to 220–280 μg/ml in the spring, whereas in the male the range is only 1.3–1.5 times, from 140–170 to 180–250 μg/ml.5. In the female the rate of egg laying was maximal in April–May and lowest in November–December.6. The spring increase in plasma holoRBP reflects the increased vitamin A requirement of birds for reproduction and it is presumably under hormonal control. The wider amplitude in the female cycle compared with the male probably arises from the additional demand for the transfer of vitamin A into the eggs and hence the need for a higher initial secretion rate from the female liver to meet it.

scholarly journals A by-product of pinto beans in diets for quail in the laying phase

2020 ◽  
Vol 42 ◽  
pp. e48883
Author(s):  
Gisele Maria Nunes Vieira ◽  
Adriana Aparecida Pereira ◽  
Dirceu Neutzling Griep Júnior ◽  
Wilson Araújo da Silva ◽  
Samila Santos Viana ◽  
...  
Keyword(s):  
Japanese Quail ◽  
Egg Quality ◽  
Quality Parameters ◽  
Egg Laying ◽  
Egg Mass ◽  
Feed Conversion ◽  
Randomized Design ◽  
Final Weight ◽  
Completely Randomized Design ◽  
Pinto Beans

The aim of this study was to evaluate levels of inclusion of pinto beans in diets for quail in the laying phase on their performance and egg quality. A total of 280 Japanese quail in the laying phase were distributed into five treatments in a completely randomized design with eight replicates and seven birds per plot. Treatments consisted of five levels (0, 2, 4, 6, and 8%) of inclusion of pinto beans in the diets, which remained isoenergetic and isoproteic. The experiment began with the quail at 70 days of age and lasted 63 days, with their performance assessed every 21 days and egg-quality parameters on the last two days of each cycle. The following parameters were evaluated: final weight, feed intake, egg-laying rate, feed conversion (per dozen eggs and per egg mass), egg weight, eggshell thickness, specific gravity, yolk color, and weights of shell, yolk, and albumen. No difference was detected between the bean inclusion levels for any of the performance and egg-quality traits assessed or the birds' final weight. In conclusion, up to 8% raw pinto beans may be added in diets for Japanese quail in the laying phase without compromising their performance or internal-external egg quality.

Sign in / Sign up

Export Citation Format

Share Document