BIOMAT Database Logo BIOMAT Database Logo

The effects of ahemeral light and dark cycles on growth and sexual maturity in chickens. 1977

R J Etches

Replacement pullets were reared in environmentally controlled chambers in which the lighting schedule was 14L:7D, 14L:10D or 14L:14D. Both temperature and humidity were constant throughout the experiment. Neither body weight nor age at sexual maturity were altered by these lighting schedules. It was concluded that a unifying hypothesis to explain the various effects of photoperiods on growth and sexual maturity would probably not involve circadian rhythms.

UI MeSH Term Description Entries
D008027 Light That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range. Light, Visible,Photoradiation,Radiation, Visible,Visible Radiation,Photoradiations,Radiations, Visible,Visible Light,Visible Radiations
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D002940 Circadian Rhythm The regular recurrence, in cycles of about 24 hours, of biological processes or activities, such as sensitivity to drugs or environmental and physiological stimuli. Diurnal Rhythm,Nyctohemeral Rhythm,Twenty-Four Hour Rhythm,Nycthemeral Rhythm,Circadian Rhythms,Diurnal Rhythms,Nycthemeral Rhythms,Nyctohemeral Rhythms,Rhythm, Circadian,Rhythm, Diurnal,Rhythm, Nycthemeral,Rhythm, Nyctohemeral,Rhythm, Twenty-Four Hour,Rhythms, Circadian,Rhythms, Diurnal,Rhythms, Nycthemeral,Rhythms, Nyctohemeral,Rhythms, Twenty-Four Hour,Twenty Four Hour Rhythm,Twenty-Four Hour Rhythms
D005260 Female Females
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012741 Sexual Maturation Achievement of full sexual capacity in animals and in humans. Sex Maturation,Maturation, Sex,Maturation, Sexual

Related Publications

R J Etches
Ahemeral light-dark cycles and intermittent photoperiod effects on laying hens.
November 1986, Poultry science,
R J Etches
The effects of ahemeral light and dark cycles on egg production in the fowl.
March 1973, Poultry science,
R J Etches
Selection for increased egg mass under ahemeral light-dark cycles.
June 1986, British poultry science,
R J Etches
The photoperiodic effect of ahemeral light-dark cycles which entrain circadian rhythms.
March 1978, British poultry science,
R J Etches
Entrainment of oviposition in Japanese quail using ahemeral light-dark cycles [proceedings].
August 1979, The Journal of physiology,
R J Etches
Influence of different light regimens on the growth and sexual maturity of chickens.
September 1967, Growth,
R J Etches
The time factor in egg formation for hens exposed to ahemeral light-dark cycles.
September 1973, British poultry science,
R J Etches
Ahemeral light-dark cycles and egg production parameters of ring-necked pheasants (Phasianus colchicus).
February 1987, Poultry science,
R J Etches
The effects of dietary protein levels, ahemeral light and dark cycles, and intermittent photoperiods on the performance of chicken broiler parent genotypes.
June 1980, Poultry science,
R J Etches
Effects of light-dark cycles.
June 1976, Science (New York, N.Y.),
Copied contents to your clipboard!