day length

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day length

the number of daylight hours per day, increasing towards midsummer and the reverse towards midwinter. The effective trigger in the commencement and cessation of the breeding seasons in those species that demonstrate seasonal breeding.
References in periodicals archive ?
The critical daylength may be longer for male plants than for female plants in a given population, which is consistent with the fact that males normally come into flower faster (Borthwick & Scully, 1954).
I was fascinated when I learned about subjects as diverse as animal thermoregulation and how daylength controlled avian reproduction.
Possible effects of global warming on fish recruitment: shifts in spawning season and latitudinal distribution can alter growth of fish early life stages through changes in daylength.
Pharmacological doses of thyroxine simulate the effects of increased daylength and thyroidectomy decreased daylength, on the reproductive system of European starlings.
Another important factor working in the early hunter's favor is extreme daylength.
Daylength effects on stress and fear responses in broiler chickens.
Diurnal and Seasonal Mood Vary with Work, Sleep, and Daylength across Diverse Cultures.
Daylength extends for more than 13 hours, providing some evening work time.
Rose, Variability of Soybean Phenology Response to Temperature, Daylength and Rate of Change in Daylength, 18 Field Crops Res.
rubecula in southern locations was the premature induction of diapause, caused by short daylength, before seasonal temperatures had declined.
The paper "Diurnal and Seasonal Mood Tracks Work, Sleep and Daylength Across Diverse Cultures" claims that positive tweets were seen in abundance on Saturdays and Sundays, with the morning peaks occurring about two hours later in the day, implying that people awaken later on weekends.
Budde (1983) claims that daylength and lack of moonlight is important in triggering puberty, as well as ovulation activities, in female white-tailed deer (Odocoileus virginianus).