| A photoperiod of 16 h was maintained with high-pressure sodium lamps to extend the day length when required. |
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| Measurements and sampling were done in the middle of the photoperiod at all sampling times. |
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| Exposure of male edible dormice all year round to an unvarying photoperiod and warm temperature disrupted their biological cycles. |
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| The greenhouse was heated all winter and supplemental lighting extended the photoperiod to prevent dormancy. |
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| For enzymatic activities and sugar determinations, samples were collected at the middle of the photoperiod. |
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| In addition to photoperiod and vernalization, ambient growth temperature can have profound effects on flowering. |
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| The metabolism of poikilothermous animals is most influenced by the environmental variables of temperature, nutrition, and photoperiod. |
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| In this paper we present the use of these dosimetric techniques to study human exposure in a high-latitude polar location with a 24 hour photoperiod. |
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| The main objective of this study is to reduce the maturation and spawning cycle of a wolffish population by manipulating the photoperiod. |
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| One group is being exposed to a seasonal photoperiod, while the second is being exposed to a shortened seasonal photoperiod of eight months. |
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| Summary of 10 studies examining the effect of increased photoperiod on milk yield in lactating cows. |
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| Preliminary observations indicate an impact of the photoperiod on the regulation of the reproductive cycle. |
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| Use of a DNA encoding a protein comprising the amino acid sequence of SEQ ID NO:1 for increasing the photoperiod sensitivity of plants. |
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| The initiation of reproduction in the beach flea, Orchestia gammarellus, is affected by temperature, but not by changes in photoperiod or salinity. |
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| The suppression of clv2 phenotypes is a true photoperiod response. |
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| Cytoplasmic inheritance or dauermodification are considered the most likely explanations for this difference in photoperiod reaction. |
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| They have a marked photoperiod, highly influenced by the moon. |
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| With increasing temperatures, length of photoperiod and light intensities, leaves grew larger and reached a height of up to 40 cm above water level. |
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| Factors affecting this include: response to morphological and hydrodynamic habitat characteristics, photoperiod, competitors or predators, schooling, and optical, acoustical, tactile and rheotactic stimuli. |
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| The black out shading in the smaller zone offers Ravensbergen an important advantage by creating a specific photoperiod, providing much more flexibility in growing certain light-sensitive crops. |
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| Role of temperature and photoperiod in annual reproductive cycle of the rose bitterling Rhodeus ocellatus ocellatus. |
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| As in the case of vernalization, photoperiod undoubtedly affects the metabolism of the known plant hormones, and so influences many other developmental responses apart from flowering. |
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| The moult, initiated by photoperiod, starts earlier in autumn and later in spring at higher latitudes. |
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| Agronomic haracteristics of autum and winter seeded photoperiod in sensitive spring wheat in agro-climate of north-west India. |
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| Effects of temperature, photoperiod, and light intensity on the calling rhythm in arctiid moths. |
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| Temperature and photoperiod were not alternated among chambers over the duration of the experiment due to mechanical constraints. |
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| Effects of photoperiod, melatonin and pinealectomy on ethanol consumption in rats. |
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| With photoperiod change less dramatic and climate change less severe, selective pressures are less intense. |
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| By rounding the hours, and then calculating morning and afternoon photoperiods, the students can easily calculate the entire day's photoperiod. |
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| Because some plants are obligately dependent on photoperiod, meaning that they will not flower until the dark period reaches a certain length, warmer weather earlier in the year has no effect on their flowering time. |
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| In every case, the critical photoperiod had declined over time. |
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| Those of major importance in contributing to the onset of dormancy include changes in temperature and photoperiod and the availability of food, water, oxygen, and carbon dioxide. |
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| The minimum photoperiod required for formation of bulbs in garlic and onion plants differs among varieties, and local day length is a determining factor in the selection of varieties. |
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| Yacon is adaptable and insensitive to photoperiod or day length. |
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| All groups were held under artificial photoperiod of using electric horologe of an intensity of 72 watts. |
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| Larvae require at least a 12 hr photoperiod for completion of development. |
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