Influence of period length of light/dark cycles on the body weight and food intake of young rats

@article{Vilaplana1995InfluenceOP,
  title={Influence of period length of light/dark cycles on the body weight and food intake of young rats},
  author={Jordi Vilaplana and Juan Antonio Madrid and Javier S{\'a}nchez‐V{\'a}zquez and A. Campuzano and Trinitat Cambras and Antoni D{\'i}ez-Noguera},
  journal={Physiology \& Behavior},
  year={1995},
  volume={58},
  pages={9-13}
}

Different light–dark cycles affect growth rate and food intake of mice

TLDR
The results suggest that differentLD cycles may affect many physiological processes including growth rate, food intake and hormones, and the change of growth rate in different LD cycles may be related to the level of corticosterone and growth hormone concentrations.

Feeding behavior and entrainment limits in the circadian system of the rat.

TLDR
The hypothesis that the rat's circadian system is composed of multiple oscillators with different intrinsic frequencies and varying capacities for light synchronization would explain the partial desynchronization observed near the entrainment limits.

Physiological and cognitive consequences of a daily 26h photoperiod in a primate (M. murinus)

TLDR
The potential costs of imposing a 26h photoperiodic regimen compared to the classical 24h entrainment measuring several physiological and cognitive parameters are evaluated, suggesting that a great deviation of external cycles from 24h leads to daily greater synchronization costs, and lower cognitive capacities.

Physiological and cognitive consequences of a daily 26 h photoperiod in a primate: exploring the underlying mechanisms of the circadian resonance theory

TLDR
This study evaluated the potential costs of imposing a 26 h photoperiodic regimen compared to the classical 24 h entrainment measuring several physiological and cognitive parameters in males of a non-human primate and suggests that a great deviation of external cycles from tau leads to daily greater energetic expenditure, and lower cognitive capacities.

2 Rodent models to study the metabolic effects of shift work in humans

TLDR
An overview of the available animal studies with a focus on the four most relevant models that are being used to mimic human shift work: altered timing of food intake, activity, sleep or 4) light exposure is provided.

Rodent models to study the metabolic effects of shiftwork in humans

TLDR
An overview of the available animal studies with a focus on the four most relevant models that are being used to mimic human shiftwork: altered timing of food intake, activity, sleep, or (4) light exposure is provided.

The impact of light, noise, cage cleaning and in-house transport on welfare and stress of laboratory rats

TLDR
The behaviour and physiological responses of laboratory rats to different environmental housing conditions and routine procedures are reviewed and how these can influence and improve the quality of scientific data is discussed.

References

SHOWING 1-10 OF 10 REFERENCES

Food intake and growth of rats fed with adiurnal periodicity

Photoperiodic Effect on Growth and Feed Consumption of Young Bulls

TLDR
There was no effect of extended photoperiod on body size, when animals were slaughtered at similar live weights, and the positive effect on weight gain and feed consumption decreased towards the end of a 24 week period, while feed consumption remained relatively high.

Effect of Extended Photoperiod on the Growth of Sheep

Growing lambs kept for 3–4 months under artificial long photoperiods (16L:8D) grow significantly faster than those under short photoperiod (8L:16D). Much of the extra weight is in gut fill but

Effects of increasing photoperiod length on performance and health of broiler chickens.

TLDR
In terms of health, increasing lighting programmes were superior to near-continuous light for broiler chickens and the incidence of sudden death syndrome (SDS) and mortality other than SDS were numerically lower for the increasing lighting treatments.

Rats on 22.5‐Hr Light:Dark Cycles Have Vaginal Opening Earlier Than Rats on 26‐Hr Light:Dark Cycles

  • S. Lehrer
  • Biology, Psychology
    Journal of pineal research
  • 1986
TLDR
A set number of cycles can occur in a shorter time than usual, allowing puberty to take place early in blind girls, according to circadian rhythms like those of rats on 22.5‐hr light:dark cycles.

Seeking tau: A comparison of six methods

Abstract Six methods for measuring the period of circadian rhythms (tau) have been compared using real and artificial data. The modified periodogram technique estimates tau by fitting a data‐specific

Hormonal and Photoperiodic Control of Growth

The growth and performance of growing-finishing steers receiving growth stimulants via commercially-available subdermal implants are discussed in relation to the endogenous steroids secreted by the

BIOLOGICAL RHYTHMS AS ORGANIZATION AND INFORMATION

  • D. LloydE. Rossi
  • Physics
    Biological reviews of the Cambridge Philosophical Society
  • 1993
TLDR
The periodic processes of living systems on all levels from the molecular, genetic and cellular to the neuroendocrinological, behavioural and social domains are reviewed.