Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
152
datasets available to search
ShareScore release 0.7.1
Dataset results
152 results for “Photoperiod”
Manipulation of photoperiod induces fat storage, but not fat mobilization in the migratory songbird, Dumetella carolinensis (Gray Catbird).
<p>Associated R code and data sets for analyses related to the "Manipulation of photoperiod induces fat storage, but not fat mobilization in the migratory songbird, Dumetella carolinensis (Gray Catbird)." publication. </p>
Growth of Thalassiosira gravida and Thalassiosira rotula across different levels of temperature, photoperiod, and microbiome presence
<p>The provided data represent maximum growth rates of the temperate diatom <em>Thalassiosira</em> <em>rotula</em> obtained from<span> the Harder Lab (University of Bremen; strain <em>T. rotula</em>_S16)</span> and the polar diatom <em>Thalassiosira</em> <em>gravida</em> was obtained <span>from the Norwegian culture collection of algae (NORCCA strain number UIO 478). Data were </span>assessed in a nanocosm (microtiter-plate) 7-day multi-stressor laboratory experiment conducted in November 2022. The experimental design includes different combinations of temperature (4°C; 9°C; 13.5°C), photoperiod (4:20; 16:8; 24:0) and microbiome presence (xenic; axenic) at which growth was assessed to evaluate interactive effects of abiotic factors (temperature & photoperiod) and biotic facors (interactions with microbiome bacteria). Moreover, the code to process the data for statistical analysis is provided.</p>
Data for: Predictable local adaptation in butterfly photoperiodism but not thermal performance along a latitudinal cline
<p>In seasonal environments, organisms must synchronize their life cycles to conditions favorable for growth and reproduction. Because season length varies geographically, local adaptation should arise in traits that regulate phenological responses. Geographic photoperiodism clines are well-known, but comparable studies on thermal performance are equivocal and often overlook non-linear responses. Therefore, we examined local adaptation in plastic responses to both photoperiod and temperature along a 752 km latitudinal cline, by comparing four Swedish populations of the butterfly <em>Pieris napi</em>. Using a common garden design, we estimated (1) photoperiod response curves for diapause induction and (2) thermal performance curves for development and growth rates. We show that differences in photoperiodism follow the expected geographical pattern, where diapause is induced at longer daylengths in northern populations (where growth seasons are short and summer days long). However, population differences in thermal performance curves were small and seemingly idiosyncratic, without clear clinal patterns. Photoperiodic responses appear to evolve more readily than thermal responses, highlighting photoperiodism as a key driver of local life cycle synchronization.</p>
Photoperiod controls wing polyphenism in a water strider independently of insulin receptor signaling
Insect wing polyphenism has evolved as an adaptation to changing environments and a growing body of research suggests that the nutrient sensing insulin receptor signaling pathway is a hot spot for the evolution of polyphenisms, as it provides a direct link between increased growth and the available nutrients in the environment. However, little is known about the role of insulin receptor signaling in polyphenisms which are controlled by seasonal variation in photoperiod. Here, we demonstrate that wing length polyphenism in the water strider Gerris buenoi is determined by photoperiod and nymphal density, but not by nutrient availability. Exposure to a long-day photoperiod is highly inducive of the short-winged morph whereas high nymphal densities moderately promote development of long wings. Using RNA interference we demonstrate that, unlike in several other species where wing polyphenism is controlled by nutrition, there is no detectable role of insulin receptor signaling in wing morph induction. Our results indicate that the multitude of possible cues that trigger wing polyphenism can be mediated through multiple genetic pathways in insects.
Data from: Longer days, larger grays: Carryover effects of photoperiod and temperature in gray treefrogs, Hyla versicolor
<p>Environmental conditions like temperature and photoperiod can strongly shape organisms' growth and development. For many ectotherms with complex life cycles, global change will cause their offspring to experience warmer conditions and earlier-season photoperiods, two variables that can induce conflicting responses. We experimentally manipulated photoperiod and temperature during gray treefrog (<em>Hyla versicolor</em>) larval development to examine effects at metamorphosis and during short (10-day) and long (56-day) periods post-metamorphosis. Both early- and late-season photoperiods (April and August) decreased age and size at metamorphosis relative to the average-season (June) photoperiod, while warmer temperatures decreased age but increased size at metamorphosis. Warmer larval temperatures reduced short-term juvenile growth but had no long-term effect. Conversely, photoperiod had no short-term carryover effect, but juveniles from early- and late-season larval photoperiods had lower long-term growth rates than juveniles from the average-season photoperiod. Similar responses to early- and late-season photoperiods may be due to reduced total daylight compared to average-season photoperiods. However, juveniles from late-season photoperiods selected cooler temperatures than early-season juveniles, suggesting not all effects of photoperiod were due to total light exposure. Our results indicate that despite both temperature and photoperiod affecting metamorphosis, the long-term effects of photoperiod may be much stronger than those of temperature.</p>
Data for: Short photoperiods end autumn migration in a naïve diurnal migrant
<p>Data are measurements of daily mean flight activity, daily mean activity 1 h before lights off, and daily body mass from individual hatch-year dunnocks (<em>Prunella modularis</em>, a songbird) captured in southern Sweden (55.68 °N, 13.43 °E). Individuals were allocated to either a control or treatment group for investigating the influence of photoperiod on the dunnocks first autumn migration. The R script used to analyze the data and obtain the results in the associated article is also provided. </p> <p>More information about the data and funding sources is available in Huffeldt <em>et al.</em> 2024, <em>Animal Behaviour:</em> <a href="https://doi.org/10.1016/j.anbehav.2024.06.011" target="_blank" rel="noopener">https://doi.org/10.1016/j.anbehav.2024.06.011</a>.</p>
Dataset - Production of polyhydroxybutyrates and carbohydrates in a mixed cyanobacterial culture: effect of nutrients limitation and photoperiods
<p>The data set attached is two excel files where the data from the article <strong>“</strong><strong>Production of polyhydroxybutyrates and carbohydrates in a mixed cyanobacterial culture: effect of nutrients limitation and photoperiods</strong>”, published in New Biotechnology (Vol. 42, 25<sup>th</sup> May 2018, 1-11), can be found, as well as the different equations and formulae that were used to obtain the published results.</p>
Manipulation of photoperiod induces fat storage, but not fat mobilization in the migratory songbird, Dumetella carolinensis (Gray Catbird) 1.
<p>Datasets for "Manipulation of photoperiod induces fat storage, but not fat mobilization in the migratory songbird, Dumetella carolinensis (Gray Catbird)" publication in the Journal of Comparative Physiology B.</p>
Data from: Repeated evolution of photoperiodic plasticity by different genetic architectures during recurrent colonizations in a butterfly
Open the record for dataset details and reuse information.
Data from: Longer days, larger grays: Carryover effects of photoperiod and temperature in gray treefrogs, Hyla versicolor
Open the record for dataset details and reuse information.
Data from: Freeze-tolerant frogs accumulate cryoprotectants using photoperiod: A potential ecological trap
Open the record for dataset details and reuse information.
Data from: Photoperiod and rainfall are associated with seasonal shifts in social structure in a songbird
Open the record for dataset details and reuse information.
Data for: Predictable local adaptation in butterfly photoperiodism but not thermal performance along a latitudinal cline
Open the record for dataset details and reuse information.
Growth of Thalassiosira gravida and Thalassiosira rotula across different levels of temperature, photoperiod, and microbiome presence
Open the record for dataset details and reuse information.
Photoperiod controls wing polyphenism in a water strider independently of insulin receptor signaling
Open the record for dataset details and reuse information.
Data from: Climate warming prolongs the time interval between leaf-out and flowering in temperate trees: effects of chilling, forcing and photoperiod
<p><span>1. Leaf-out and flowering are two key phenological events of plants, denoting the respective onsets of visible vegetative growth and reproduction during the year. For each species, the schedule of vegetative growth and reproduction is crucial to the maximization of its fitness. Warming-induced advances of leaf-out and flowering have been reported frequently, however, it is unclear whether the responses of the two events are equal for any given species. </span></p> <p><span>2. Using long-term phenological records in Europe, we examined simultaneously the responses of both leaf-out and flowering of four common temperate tree species to climate warming and further examined the effects of winter chilling, spring forcing and photoperiod on the responses of the two events. </span></p> <p><span>3. We found that regardless whether flowering or leaf-out occurred first, the first event advanced more than the second during 1950 – 2013, resulting in a prolonged time interval between the two events. The temporal changes were also supported by a similar geographical trend that the time interval between the two events increased from cold to warm sites. Due to the warming-induced reduction in chilling, the spring forcing accumulated until the second event was increased more than the forcing accumulated until the first event, and that reduced the temperature sensitivity of the second event. In addition to the effect of chilling, the shorter photoperiod, associated with the advanced spring phenology, was also likely to substantially increase the spring forcing accumulated until the second event, which thus slowed down its advance, compared to the advance of the first event. The relative contributions of chilling and photoperiod to the increased forcing varied between species and events, with chilling mostly outweighing photoperiod. </span></p> <p><span>4. Synthesis. This study provides the large-scale empirical evidence of prolonged time interval between leaf-out and flowering with climate warming. The unequal advances of the two events may alter the partition of resources between vegetative growth and reproduction and cause different changes of spring frost damage to vegetative and reproductive tissues, which may alter species fitness and further affect ecosystem structure and function.</span></p>
Prior exposure to long day photoperiods alters immune responses and increases susceptibility to parasitic infection in stickleback
<p>Seasonal disease and parasitic infection are common across organisms, including humans, and there is increasing evidence for intrinsic seasonal variation in immune systems. Changes are orchestrated through organisms' physiological clocks using cues such as day length. Ample research in diverse taxa has demonstrated multiple immune responses are modulated by photoperiod, but to date, there have been few experimental demonstrations that photoperiod cues alter susceptibility to infection. We investigated the interactions among photoperiod history, immunity, and susceptibility in laboratory-bred three-spined stickleback, a long-day breeding fish, and its external, directly-reproducing, monogenean parasite <i>Gyrodactylus gasterostei</i>. We demonstrate that previous exposure to long day photoperiods (PLD) increases susceptibility to infection relative to previous exposure to short days (PSD), and modifies the response to infection for the mucin gene <i>muc2</i> and Treg cytokine <i>foxp3a</i> in skin tissues in an intermediate 12L:12D photoperiod experimental trial. Expression of skin <i>muc2</i> is reduced in PLD fish, and negatively associated with parasite abundance. We also observe inflammatory gene expression variation associated with natural inter-population variation in resistance, but find that photoperiod modulation of susceptibility is consistent across host populations. Thus, photoperiod-modulation of the response to infection is important for host susceptibility, highlighting new mechanisms affecting seasonality of host-parasite interactions.</p>
Data from: Latitudinal clines in the timing and temperature-sensitivity of photoperiodic reproductive diapause in Drosophila montana
<p>Reproductive diapause is a primary mechanism used by arthropods to synchronize their life cycle with seasonal changes in temperate regions. Our study species, Drosophila montana, represents the northern insect species where flies enter reproductive diapause under short day conditions and where the precise timing of diapause is crucial for both survival and offspring production. We have studied clinal variation in the critical day length for female diapause induction (CDL) and their overall susceptibility to enter diapause (diapause incidence), as well as the temperature sensitivity of these traits. The study was performed using multiple strains from four latitudinal clines of the species – short clines in Finland and Alaska and long clines in the Rocky Mountains and the western coast of North America - and from one population in Kamchatka, Russia. CDL showed strong latitudinal clines on both continents, decreasing by one hour per five degrees decline in latitude, on average. CDL also decreased in all populations along with an increase in fly rearing temperature postponing the diapause to later calendar time, the effects of temperature being stronger in southern than in northern population. Female diapause incidence was close to 100 % under short day / low temperature conditions in all populations, but decreased below 50 % even under short days in 19°C in the southern North American western coast populations and in 22°C in most populations. Comparing a diversity of climatic data for the studied populations showed that while CDL is under a tight photoperiodic regulation linked with latitude, its length depends also on climatic factors determining the growing season length. Overall, the study deepens our understanding of how spatial and environmental parameters affect the seasonal timing of an important biological event, reproductive diapause, and helps to estimate the evolutionary potential of insect populations to survive in changing climatic conditions.</p>
Effects of short photoperiod and carbohydrate consumption on sleep, liver steatosis, and the gut microbiome in diurnal grass rats
<p>Seasonal affective disorder (SAD) is a recurrent depression triggered by exposure to short photoperiods, with a subset of patients reporting hypersomnia, increased appetite, and carbohydrate craving. Dysfunction of the microbiota–gut–brain axis is frequently associated with depressive disorders, but its role in SAD is unknown. Nile grass rats (Arvicanthis niloticus) are potentially useful for exploring the pathophysiology of SAD, as they are diurnal and have been found to exhibit anhedonia and affective-like behavior in response to short photoperiods. Further, given grass rats have been found to spontaneously develop metabolic syndrome, they may be particularly susceptible to environmental triggers of metabolic dysbiosis. We conducted a 2x2 factorial design experiment to test the effects of short photoperiod (4h:20h Light:Dark (LD) vs. neutral 12:12 LD), access to a high concentration (8%) sucrose solution, and the interaction between the two, on activity, sleep, liver steatosis, and the gut microbiome of grass rats. We found that animals on short photoperiods showed disrupted activity and sleep patterns but maintained robust diel rhythms and similar subjective day lengths as controls in neutral photoperiods. We found no evidence that photoperiod influenced sucrose consumption. By the end of the experiment, some grass rats were overweight and exhibited signs of non-alcoholic fatty liver disease (NAFLD) with micro- and macro-steatosis. However, neither photoperiod nor access to sucrose solution significantly affected the degree of liver steatosis. The gut microbiome of grass rats varied substantially among individuals, but most variation was attributable to parental effects and the microbiome was unaffected by photoperiod or access to sucrose. Our study indicates short photoperiod leads to disrupted activity and sleep in grass rats but does not impact sucrose consumption or exacerbate metabolic dysbiosis and NAFLD.</p>
Different photoperiodic responses in diapause induction can promote the maintenance of genetic diversity via the storage effect in Daphnia pulex
<p>Understanding mechanisms that promote the maintenance of biodiversity (genetic and species diversity) has been a central topic in evolution and ecology. Previous studies have revealed that dormancy can contribute to coexistence of competing genotypes or species in fluctuating environments via the storage effect. However, they tended to focus on differences in reproductive success (e.g., seed yield) and diapause termination (e.g., germination) timing. Here we tested whether different photoperiodic responses in diapause induction can promote coexistence of two parthenogenetic (asexual) genotypes of <em>Daphnia pulex </em>in Lake Fukami-ike, Japan. Through laboratory experiments, we confirmed that short day length and low food availability induced the production of diapausing eggs. Furthermore, we found that one genotype tended to produce diapausing eggs in broader environmental conditions than the other. Terminating parthenogenetic reproduction earlier decreases total clonal production, but the early-diapausing genotype becomes advantageous by assuring reproduction in "short" years where winter arrival is earlier than usual. Empirically parameterized theoretical analyses suggested that different photoperiodic responses can promote coexistence via the storage effect with fluctuations of the growing season length. Therefore, timing of diapause induction may be as important as diapause termination timing for promoting the maintenance of genetic diversity in fluctuating environments.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.