Tm• paucity of data on the body temperatures of small gallinaceous birds prompts us to report miscellaneous observations which we have made over the past several years on the body temperatures of the California Quail, Lophortyx californicus, a common resident in grassland and chaparral from southern Oregon to southern Baja Cal/fornia, and the Gambel's Quail, L. œambelii, a resident in the deser...

Sex ratio theory suggests that females should bias offspring sex ratios based on maternal condition and the availability of critical food resources. Work in birds indicates do, indeed, according to quality quantity. Yet it is unknown whether these skews occur due fluctuations particular micro‐ or macro‐nutrients, caloric content overall even perception availability. We hypothesized dietary fats...

The aim of the present study was to evaluate the effect of acute heat stress on the production of mitochondrial reactive oxygen species (ROS), the gene expression of the avian uncoupling protein (avUCP) and glutathione peroxidase (GPX 7), and the activity of the enzyme GPX in the liver of meat quail. Two groups of 15 meat quail (Coturnix coturnix japonica) that were 23 d of age were initially h...

Colibacillosis caused by avian pathogenic Escherichia coli (APEC) is an economic threat to the poultry industry throughout the world. Some of the virulence genes may enhance the ability of E. coli isolates to grow in the tissues of broilers. The APEC strains are assigned to a few distinct phylogenetic groups. The purpose of the present study was to detect the virulence genes and phylogenetic gr...

Evidence from both field and laboratory is consistent with the hypothesis that animals can acquire mate preferences by observing the mating behavior of others. It is difficult, however, to distinguish social learning about mates from a host of other social effects on mating that do not produce changes in preferences. Examples are drawn from laboratory studies on mate choice in female and male J...

The somitic involvement in the formation of the vertebral column was examined using the chick-quail chimaera model. Single cervical somites from quail donor embryos were transplanted into similarly staged chick host embryos. Following further incubation, serial sections of variously staged embryos were stained with the Feulgen reaction to distinguish the two cell populations. Quail cells were g...

The main purpose of this study is to extend the microscopic investigations of the pecten oculi in the quail in order to add some information on the unresolved functional anatomy of this unique avian organ. The pecten oculi of the quail was studied by scanning electron microscopy. Eighteen- to-twenty two highly vascularised accordion-like folds were joined apically by a heavily pigmented bridge ...

Previous studies from this laboratory have dealt with the protein, calcium, phosphorus, vitamin D, manganese, zinc, riboflavin, niacin and choline requirements of pheasants (Scott, et al., '54, '58a, '59) . The phosphorus requirements of young Bobwhite quail also have been reported (Scott, et al., '58b). Although many studies have been made on the effects of various levels of salt in rations fo...

The fate map of the early neural plate and neural fold has been established at the cephalic level by using the quail-chick marker system (Le Douarin, 1969,1973). The experimental design comprised the replacement of definite territories belonging to the neural plate and neural folds in the chick embryo by their counterparts from quail embryos at the same developmental stage. This technique is re...

In recent years, Japanese quail meat has gained much popularity among consumers. The aim of this study was to evaluate the meat quality characteristics and nutritional composition of Nandanam Quail-III (Coturnix coturnix japonica) meat as influenced by age at slaughter. Totally twelve birds were divided into two different age groups. The birds were slaughtered and breast muscle was obtained. Th...