Quantitative measurement by telemetry of ovulation and oviposition in the fowl

Abstract

A radio telemetry system was used to establish a deep body temperature cycle in a domestic male and a female fowl under continuous light of constant intensity. Certain sex differences were noted. In the female, the maximum body temperature was reached at time of oviposition. There were two peaks in temperature during the daily temperature maxima in the animal, which laid an egg the next day. Oviposition may account for one peak and ovulation the other. The female had a 28-hr cycle and the male a 24-hr cycle. The data were evaluated by autocovariance, power spectral analysis, harmonic regression, and other methods.

Ovulation and equine body temperature and heart rate circadian rhythms

“…with a circadian range of between 2 and 3° C. The circadian range of oscillation of the DBT rhythm in the horse, approximately 0.5°C (Fig. 1) under constant thermal conditions, is less than that of any other homeotherm studied under constant temperature conditions (Kleitman and Ramsaroop, 1948;Halberg et al, 1954;Chaudhry et al, 1958;Winget et al, 1965;Winget et al, 1968;Ingram and Legge, 1970;Maloiy, 1971;Morishima and Gale, 1972;Winget et al, 1972b, Alliston andRich, 1973;Aschoff et al, 1973;Dills and Manganiello, 1973;Hampton, J973;Ingram and Mount, 1973;Cain and Wilson, 1974), or under a nychthemeral temperature environment (Kleitman and Ramsaroop, 1948;Bligh and Harthoorn, 1965;Blight et al, 1965;Ingram and Legge, 1970;Maloiy, 1971;Alliston and Rich, 1973;Cain and Wilson, 1974). The failure in this study to, in some cases, demonstrate statistically'significat 24-hr rhythms in DBT and HR probably results from this inherently low amplitude, since the relative effect upon measured rhythmic stability of random error or transient physiological…”

“…If artificial insemination is to be used successfully to breed mares that are kept by owners who do not have a means of teasing them, an accurate, quick and simple method of determining approaching ovulation must be derived. The continuous monitoring of physical parameters such as body temperature and heart rate by radiotelemetry may provide basic knowledge of events premonitory of ovulation (Winget et al, 1965;Balin and Wan, 1968). The purpose of this investigation was to describe the body temperature and heart rate circadian rhythms and their relationships in the mare and to determine if the ovulatory process produced changes in these parameters that could be used to predict or determine ovulation.…”

“…Measurement of the basal body temperature is a widely accepted indirect method to determine ovulation in the woman (Tompkins, 1945;Whitlaw, 1952) and has been used to determine ovulation in the monkey (Balin and Wan, 1969) and chicken (Winget et al,. 1965).…”

The Effects of Diurnal Rhythms on Immune Parameters in New Hampshire Chickens

“…In the domestic bird, diurnal variation occurs in various physiological processes [1,5,10,15,19,22,[27][28][29]. When T lymphocytes were collected at various time intervals dur ing a 24-hour cycle, a variation was ob served in the migratory activity of the cells.…”

“…However, deep body temperature showed a clear circadian rhythm even under constant illumination [28]. Yano et al [29] also alluded to a cir cadian rhythm of EEG components of hens under constant illumination.…”