Coturnix

About: Coturnix is a research topic. Over the lifetime, 953 publications have been published within this topic receiving 23305 citations.

Renal Clearance Studies in Stubble Quail Coturnix pectoralis and King Quail Coturnix chinensis under Conditions of Hydration, Dehydration, and Salt Loading

Abstract: Glomerular filtration rate (GFR) and effective renal plasma flow (ERPF) were measured in two species of Australian quail-stubble quail, Coturnix pectoralis, and king quail, Coturnix chinensis-under conditions of full hydration, dehydration, and salt loading. Iodine-125-labeled [125I] sodium iothalamate was found to be a suitable GFR marker for these species, since its clearance is not significantly different from that of inulin. Creatinine is secreted by the renal tubules of stubble quail and is therefore unsuitable as a GFR marker. The GFR of hydrated birds was 8.31 ml(min· kg)⁻¹ for stubble quail and 10.3 ml(min · kg)⁻¹ for king quail. For both species, GFR was reduced by dehydration and salt loading. ERPF for hydrated animals was 36.9 ml(min · kg)⁻¹ and 30.7 ml(min · kg)⁻¹ for stubble and king quail, respectively. ERPF decreased in both species in response to dehydration and in stubble quail to salt loading. An allometric equation relating GFR to body weight (M) is derived using 39 data points from 13 ...

Effects of Atrazine and Glyphosate ingestion on body weight and nutritional well-being of Coturnix quail

Abstract: A test on how the herbicides Atrazine and Glyphosate affect nutritional well-being of Japanese quail (Coturnix quail japonica) was run. Individual quail were fed control, Atrazine or Glyphosate-treated food with concentrations as follows: food was treated with Atrazine or Glyphosate at 1-fold, 4-fold, or 10-fold estimated concentrations or spilled grain that label concentrations of the herbicides would produce. These treatments corresponded to 347, 1388, or 3470 ppm of the active ingredients of each herbicide. Each treatment group had 10 individually penned quail. Twelve controls were used. Amounts of each food consumed were recorded for each quail. Data from controls were compared against both Atrazine-treated and Glyphosate-treated food groups as all treatments were run simultaneously. Quail fed Atrazine-treated food had reduced (P<0.05) body masses for all 3 Atrazine treatments. Body fat content was reduced (P<0.05) in 4-fold and 10-fold treatments in comparison to body fat content of quail fed Glyphosate-treated food and to controls. Atrazine contamination of foods appears to adversely influence nutritional well-being and body fat content. Glyphosate appears not to impact body masses and fat masses.

Origin of ovarian follicle cells in birds.

Abstract: In the embryonic Japanese quail ovary, transplanted on chicken chorioallantoic membrane (CAM), follicle cells are derived from somatic cells of the ovarian surface epithelium. No evidence was found for a contribution of other cell groups of the quail ovary in the formation of follicle cells. This may be demonstrated on PAS stained sections, by following the transfer of carbon particles, initially applied on the surface epithelium.

Association of the FADS2 gene with omega-6 and omega-3 PUFA Concentration in the egg yolk of Japanese quail

Abstract: This study focused on the association of polymorphisms of the FADS2 gene with fatty acid profiles in egg yolk of eight Japanese quail lines selected for high and low omega-6:omega-3 PUFA ratio (h2 = 0.36-0.38). For the identification of polymorphisms within the FADS2 gene 1350 bp of cDNA sequence were obtained encoding 404 amino acids. Five synonymous SNPs were found by comparative sequencing of animals of the high and low lines. These SNPs were genotyped by single base extension on 160 Japanese quail. The association analysis, comprising analysis of variance and family based association test (FBAT), revealed significant effects of SNP3 and SNP4 genotypes on the egg yolk fatty acid profiles, especially the omega-6 and omega-3 PUFAs (P < 0.05). No effects of the other SNPs were found - indicating that these are not in linkage disequilibrium with the causal polymorphism. The results of this study promote FADS2 as a functional candidate gene for traits related to omega-6 and omega-3 PUFA concentration in the egg yolk.

Luteinizing hormone secretion from the quail pituitary in vitro.

Abstract: An enzymatically dispersed pituitary preparation from Japanese quail (Coturnix coturnix) was used to study the dynamics of gonadotropin release. After an 18-h incubation, the cells were challenged with different luteinizing hormone-releasing hormones (LHRH) for 90 min. Using pituitary cells from mature males, mammalian and chicken LHRH I (Gln8-LHRH) had approximately equal luteinizing hormone (LH)-releasing activity whereas chicken LHRH II (His5, Trp7, Tyr8-LHRH) was 8-9 times more potent. The LHRH agonist (Trp6, Pro9-NEt-LHRH) had 15 times greater potency than chicken LHRH I. Pre-incubation with an LHRH antagonist (D-Phe2, D-Trp6-LHRH) significantly suppressed LH release. Acid extracts of median eminence released LH from pituitary cells, extracts from short-day and long-day males had equal activity, while tissue extracts from castrated males had significantly greater LH-releasing activity. Pituitary cells from sexually immature males released LH in response to chicken LHRH I in a similar profile to cells from mature males. These data indicate that the quail LHRH receptor in the male recognizes several different molecular species of LHRH and the response to LHRH is comparable between short- and long-day males. Pituitary cells from ovulating females were variably sensitive to LHRH peptides, possibly due to changes in pituitary sensitivity during the ovulatory cycle. Pituitary cells from immature females did not release LH in response to chicken LHRH I. However, pituitary cells from immature females photostimulated for 1 wk displayed a response to chicken LHRH I and II similar to that of pituitary cells from males.(ABSTRACT TRUNCATED AT 250 WORDS)