Showing papers on "Coturnix published in 1971"
TL;DR: The average sensitivity of any one species to the 16 pesticides did not differ statistically from that of any other species, and at the same time, the species varied widely in their sensitivity to any given compound.
53 citations
01 Jan 1971
TL;DR: Coturnix quail is one of the few among the birds so far described that have metacentric or submetacentric chromosomes recognizable to about chromosome size twenty.
Abstract: The materials for the karyograms were prepared from feather pulp and embryonic tissue of coturnix quail secured through the courtesy of Dr. Hans Abplanalp, University of California, Davis. This colony originated from Japan. This species is one of the few among the birds so far described that have metacentric or submetacentric chromosomes recognizable to about chromosome size twenty.
45 citations
TL;DR: The purpose of this study was to determine the effects of aging on egg laying, fertility, hatchability and mortality of Japanese quail maintained under normal laboratory conditions.
45 citations
TL;DR: As the interest in the study of Japanese quail (coturnix) developed, the maintenance of populations on diets containing about 28% crude protein was adopted and recent studies indicate that coturnix can be started on dietscontaining 25–26% protein.
39 citations
TL;DR: In both turkeys and chickens, increases were noted in ovum weight and the duration of rapid development with increasing age, while clutch length and position in the clutch had no effect.
35 citations
TL;DR: The body-water half-life in coturnix quail was 2·1 days and the turnover was 0·2 ml water/g body wt.
30 citations
TL;DR: The present study follows the effects of DDT and DDE on egg production and egg shell quality in Japanese quail fed an adequate calcium diet.
22 citations
18 citations
TL;DR: The size to hatchability of Coturnix eggs is related to the results of Romanoff (1938) who found that Bobwhite quail eggs need slower air movement than pheasant eggs.
16 citations
TL;DR: To determine the effects of light-temperature interactions on the gonadal function and energy consumption of old and young adult coturnix, and further to determine the amount of feed intake associated with egg formation, two experiments were conducted.
14 citations
TL;DR: Early growth of chickens has been arrested at a physiological age of about 10 days over a period of six months either by severely restricting the intake of a well-balanced diet or by decreasing food intake via tryptophan deficiency as in the corn-dextrose diet of McRoberts (1965).
TL;DR: The use of Bobwhite quail in genetic, nutritional and management research is well documented; however, very few references are available concerning the preparation and use of these birds for human food, (Crispens, 1960; Greenberg, 1949).
TL;DR: Two coccidia-free chicks 8 days old were inoculated with 50,000 oocysts each of E. bateri, but patent infections did not occur, and this coccidium is therefore presumably host-specific.
Abstract: SYNOPSIS. Eimeria bateri Bhatia, Pandey, Pande, 1965 is described from the Hungarian quail Coturnix c. coturnix for the first time in the U.S. Its oocysts are either ellipsoidal or ovoid, 14–28 by 12–19 μ with a mean of 20.5 by 15.3 μ. Its sporocysts are elongate ovoid, with a Stieda body, 8–12 by 6–9 μ with a mean of 10.3 by 7.5 μ.
Two coccidia-free chicks 8 days old were inoculated with 50,000 oocysts each of E. bateri, but patent infections did not occur. This coccidium is therefore presumably host-specific.
Journal Article•
TL;DR: Studies reported here show differences in viability, hatchability, fertility, egg production and weight and age at sexual maturity between the recently imported wild species and the domesticated coturnix, leading to speculation that the bird might still be established as a game bird in this country, despite previous unsuccessful attempts with the domestication strains.
Abstract: Domestic coturnix, or Japanese quail, have been used for research in several disciplines at the Avian Sciences Department, Davis, since 1957…including investigations in environmental physiology, nutrition, genetics, cancer, environmental toxicology, and embryology. The small, fastmaturing birds allow savings in research time and money. Studies reported here show differences in viability, hatchability, fertility, egg production and weight and age at sexual maturity between the recently imported wild species and the domesticated coturnix…leading to speculation that the bird might still be established as a game bird in this country, despite previous unsuccessful attempts with the domesticated strains.
TL;DR: The physiological mechanisms of quail which deal with divalent cations are affected similarly by both Ca and Mg, without distinguishing sharply between the two, as shown in experiments to indicate the abilities of birds to tolerate and excrete Mg and Ca in drinking water.
TL;DR: The photoperiodic induction of gonadal growth in coturnix (Japanese quail) was studied in relation to the existence of a daily photosensitive phase and significant differences in sexual maturation were not apparent.
Abstract: The photoperiodic induction of gonadal growth in coturnix (Japanese quail) was studied in relation to the existence of a daily photosensitive phase. A cycle of 14 hrs of dim green light and 10 hrs of darkness was used to synchronize activity rhythms of three groups of birds. In addition to this treatment, the second group of quail received a 3‐hr pulse of white light at the beginning of the green phase, and another group was given a 3‐hr light pulse at the end of the green phase. A fourth group was maintained in total darkness for 16 weeks. The control group for each experiment was given 14 hrs of white light and 10 hrs of darkness daily. Control birds reached sexual maturity before 8 weeks of age. Some quail kept in total darkness were sexually mature by 10 weeks of age. Significant differences in sexual maturation were not apparent among the three groups of birds receiving 14 hrs of dim green light daily, two of which were given white light pulses either at the beginning or at the end of the gr...