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Showing 1 to 12 of 12 for “"Photoperiodism."”.
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Photoperiodism in the ewe: Endogenous circannual rhythms and olfactory mechanisms influencing reproductive activity
Sheep exhibit periods of breeding and non-breeding activity that are correlated with annual changes in daylength. The seasonal nature and timing of reproductive activity in this species is thought to result from the complex interplay of endogenously generated rhythms with exogenous factors …
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The Effect of Light Conditions, Temperature and Growth Regulators on Photoperiodism of Amaranthus Caudatus L
Made available in DSpace on 2015-05-12T17:04:11Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0023411.PDF: 11094491 bytes, checksum: efcafd8daf394aca9e4319a45f156d9e (MD5) Previous issue date: 1957
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Photoperiodic time measurement and seasonal adaptation of the southwestern corn borer, Diatraea grandiosella Dyar (Lepidoptera : Pyralidae)
"Photoperiodism is an adaptation which enables organisms to maintain maximum reproductive and survival efficiency under periodically changing environmental conditions. Since daylength is astronomically stable, it gives organisms the most reliable, noise-free signal to construct a developmental …
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Photoperiod, Brain Plasticity, and Behavior
… the suite of season-specific adaptations. Photoperiodism is the ability of plants and animals to measure environmental day length (photoperiod) to ascertain the time of year and engage in seasonally appropriate adaptations; the annual cycle of changing photoperiod provides the environmental …
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Camera traps as sensor networks for space-time exploration of terrestrial mammal communities
… that while some shifts only result from photoperiodism alignment, most are driven by other factors too. Chapter 3 examined temporal-partitioning as a mechanism driving sympatry. Using kernel density functions and mutivariate statistical analyses, this chapter enabled subtle nuances in the …
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Investigation of Putative Genetic Factors Associated with Soybean [Glycine Max (L.) Merr.] Seed Quality Traits
… to Arabidopsis thaliana light response and photoperiodism genes which were investigated as candidate soybean maturity genes. Markers developed from these predicted genes showed close association with the observed QTL, and could facilitate the further investigation of this complex trait.
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The effect of photoperiod on the gonads and basophilic adenohypophyseal cells of the rough-skinned newt, Taricha granulosa granulosa
The function of light in the reproductive cycle in amphibians has not been extensively studied. However, Farner (1965) feels that the small amount of experimental evidence suggests that photoperiod may play a role in the testicular cycle of Rana esculenta. The purpose of this paper is to study the …
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Relationship between photoperiod, plasma concentration of ionic calcium and the histology of the prolactin-secreting cells of the rostral pars distalis of the pituitary gland, the corpuscles of stannius and the ultimobranchial gland in the goldfish, Carassius auratus L. /
The relationship between photoperiod, plasma concentration of ionic calcium and the histology of the prolactin-secreting cells of the rostral pars distalis of the pituitary gland, the Corpuscles of Stannius and the Ultimobranchial gland were investigated. Neither the plasma concentration of ionic …
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A study of photoperiodic inhibition of flower development in Lemna Persusilla 6746
<p><i>Lemna perpusilla</i> 6746, a short day plant on Hutner's medium, is induced to flower by a single long night. Resulting flower primordia develop normally in short days but regress in unfavorable photoperiods such as long days or continuous white light. Flower development following a single …
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Response rainbow trout (Salmon gairdneri) blood gas transport system to temperature, oxygen availability and photoperiod
Hematological status in rainbow trout, Salmo gairdneri, was examined in relation to eight combinations of three environmental fa ctors; temperature (5°, 20°C), oxygen availability «35%, >70% saturation) and photoperiod (16L:8D, 8L:16D) and evaluated by 3-factor analysis of variance. Hemog l obin …