Short photoperiods end autumn migration in a naïve diurnal migrant DOI Creative Commons
Nicholas Per Huffeldt, Giuseppe Bianco,

Jessica M.V. Floyd

et al.

Animal Behaviour, Journal Year: 2024, Volume and Issue: 215, P. 23 - 29

Published: July 17, 2024

Many migratory animals use daylength, or photoperiod, to signal when migrate and transition between annual phenological states. Whether photoperiod as a temporal spatial cue while migrating, however, requires additional empirical support. We used hatch-year dunnocks, Prunella modularis (a songbird), caught during their first migration in southern Sweden elucidate whether incorporate spatiotemporal into endogenous program migration. exposed the migratory-naïve light environments that simulated either local photic conditions shorter daylength larger transitions photoperiods. All birds experienced geomagnetic conditions. hypothesized dunnocks inform predicted experimental treatment represented displacement north advancement towards winter at capture site compared control found, though, short photoperiods terminated expression of phenotype controls by reducing body mass gain ending activity, indicating integrates The incorporation may complement cues ensure correct time location. can also provide mechanism facilitates poleward shifts overwintering distribution under climate change allowing migrants overwinter newly suitable habitat higher latitude (i.e. stopping).

Language: Английский

Evidence of Quantum-Entangled Higher States of Consciousness DOI Creative Commons
Álex Escolà‐Gascón

Computational and Structural Biotechnology Journal, Journal Year: 2025, Volume and Issue: 30, P. 21 - 40

Published: Jan. 1, 2025

What if quantum entanglement could accelerate learning by unlocking higher states of conscious experience? This study provides empirical and statistical evidence how influences consciousness at a biophysical level. We analyzed data from 106 monozygotic twin pairs (N = 212), randomly assigned to control experimental groups. Using consanguinity-based matching technique, (A-B) were formed. Two distinct 2-qubit circuits designed: C1 (non-entangled) for the group E1 (entangled) group. These manipulated visual stimulus contingencies during 144-trial implicit experiment conducted under nonlocal conditions, executed via IBM Brisbane supercomputer. Mental assessed with 3D electroencephalography (EEG), while biomarkers-including Brain-Derived Neurotrophic Factor (BDNF) neuroplasticity, Free Fatty Acids (FFA), Alpha-Amylase physiological arousal-were measured. To advance this field, we introduced Quantum-Multilinear Integrated Coefficient (Q), groundbreaking metric capable estimating variance increases attributable effects within response matrices. Our findings revealed that qubits in configurations explained 13.5 % accuracy The Q coefficient captured up 31.6 increase across responses, neuroplasticity markers 26.2 cognitive performance entangled conditions. results provide robust enhances experience facilitates faster, more efficient learning. They point existence anomalous mechanisms anticipating future, unpredictable stimuli, representing profound leap our understanding its underpinnings.

Language: Английский

Citations

1

A clock for all seasons DOI Creative Commons
Charlotte Helfrich‐Förster, Dirk Rieger

Journal of Comparative Physiology A, Journal Year: 2024, Volume and Issue: 210(4), P. 473 - 480

Published: June 19, 2024

Abstract Circadian clocks play an essential role in adapting locomotor activity as well physiological, and metabolic rhythms of organisms to the day-night cycles on Earth during four seasons. In addition, they can serve a time reference for measuring day length adapt advance annual changes environment, which be particularly pronounced at higher latitudes. The physiological responses are also known photoperiodism. This special issue Journal Comparative Physiology A aims account diurnal photoperiodic adaptations by presenting collection ten review articles, five original research three perspective pieces. contributions include historical accounts, circadian clock models, epigenetic, molecular, neuronal mechanisms seasonal adaptations, latitudinal differences studies wild that address challenges global change.

Language: Английский

Citations

4

Understanding complexity of the migratory phenotype in Palearctic–Indian migratory buntings: connecting molecular dots from laboratory studies DOI Creative Commons
Vinod Kumar, Aakansha Sharma, Vatsala Tripathi

et al.

Journal of Avian Biology, Journal Year: 2025, Volume and Issue: 2025(1)

Published: Jan. 1, 2025

Avian migration has been studied for a long time. Yet, very little is understood about the mechanisms underlying preparation and departure of these migrants twice‐a‐year towards their destination. In recent years, some experimental evidence accumulated from studies on Palearctic‐Indian migratory blackheaded buntings Emberiza melanocephala redheaded bruniceps . These are obligate latitudinal migrant passerines, with yearly to‐and‐fro migrations between breeding grounds in west Asia/southeast Europe overwintering areas India. The voyages not isolated seasonal events; rather, they part overall annual itinerary closely coupled to reproduction. This review focuses mainly that have carried out more than four decades two buntings. We will outline first characteristic traits anticipation, preparation, beginning maintaining flight. subsequent sections summarize briefly molecular fat fuel accumulation, changes associated phasing activity rest periods within 24‐h day during nocturnal flight daytime stopovers. addition, we discuss mechanistic differences onward (to wintering areas, autumn migration) return grounds, spring migrations. differ context, physiological states birds prior each migration, surrounding physical environment (photoperiod, temperature, food availability) encounter period. final section perspectives presents an ecological societal relevance avian research.

Language: Английский

Citations

0

Spatiotemporal Analysis and Prediction of Avian Migration Under Climate Change DOI Open Access
Yanqi Gong, Yongfang Wang,

Hongxuan Fu

et al.

Sustainability, Journal Year: 2025, Volume and Issue: 17(7), P. 2793 - 2793

Published: March 21, 2025

Frequent bird strikes during peak migration periods pose a significant risk to aviation safety. Existing prevention methods rely on static historical patterns and lack the ability adapt real-time changes. Short-term meteorological fluctuations are crucial in shaping behavior, influencing both its timing intensity. Climate change increases variability of these factors, making predictions more difficult. Simple models may describe under stable conditions but struggle capture complexity introduced by climate-driven fluctuations. To address this, we propose model that integrates convolutional neural networks (CNNs), long short-term memory (LSTM) networks, an attention mechanism, achieving prediction accuracy consistently above 0.9. CNN extracts features, LSTM captures temporal dependencies, assigns weights important features. Unlike traditional statistical methods, this transitions from heuristic approaches data-driven quantitative forecasting, offering insights into intensity while accounting for influenced climate change. Ablation experiments showed removing module, components reduced average 3.93%, 8.47%, 10.96%, respectively. These results demonstrate predominantly occurs at night is significantly radiation levels wind conditions. This research incorporates predictive modeling develop strategies enhancing Additionally, it addresses environmental challenges promotes sustainable practices optimizing flight schedules reduce strikes, improve fuel efficiency, minimize emissions. approach also contributes ecological conservation supports sustainability goals.

Language: Английский

Citations

0

Mechanisms matching timing to resources: comparisons of closely related seasonally sympatric, migratory and non‐migratory populations DOI Creative Commons
Ellen D. Ketterson, Timothy J. Greives

Journal of Avian Biology, Journal Year: 2025, Volume and Issue: 2025(2)

Published: March 1, 2025

As day length increases in spring, birds prepare to migrate and breed, relying on timing mechanisms shaped by selection match their behavior physiology ecological conditions suitable for reproduction. the climate changes these will determine how successful be keeping up. In this contribution, we review studies comparing photoperiodic thresholds, endocrine profiles of testosterone corticosterone, gene expression during pre‐breeding seasonally sympatric migratory resident populations a songbird, dark‐eyed junco Junco hyemalis . Elevation response GnRH served as proxy gonadal development, visible fat state, stable isotopes feathers claws breeding non‐breeding latitudes. Living same environment, migrants prepared fattening delaying while residents initiated development not fattening. Within migrants, estimated latitude origin co‐varied positively with negatively development. Together likely serve migration reproduction future appearance favorable environments where occur. Differences observed wild persisted common suggesting genetic divergence local adaptation, though possibility early developmental effects remain. warms resources support appear earlier, locally adapted dispersing immigrants from lower latitudes may bring along earlier thus providing or rescue. Future research responsible variation among allow better predictions adaptation change unfold. Keywords: garden, junco, gonad, hormone, migration, phenology, threshold, isotope

Language: Английский

Citations

0

Arrhythmia in the earth’s pulse: Bird migration timing does not track advancing spring phenology DOI Creative Commons
Jeffrey F. Kelly, Paula M. Cimprich

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(13)

Published: March 18, 2024

Language: Английский

Citations

0

Short photoperiods end autumn migration in a naïve diurnal migrant DOI Creative Commons
Nicholas Per Huffeldt, Giuseppe Bianco,

Jessica M.V. Floyd

et al.

Animal Behaviour, Journal Year: 2024, Volume and Issue: 215, P. 23 - 29

Published: July 17, 2024

Many migratory animals use daylength, or photoperiod, to signal when migrate and transition between annual phenological states. Whether photoperiod as a temporal spatial cue while migrating, however, requires additional empirical support. We used hatch-year dunnocks, Prunella modularis (a songbird), caught during their first migration in southern Sweden elucidate whether incorporate spatiotemporal into endogenous program migration. exposed the migratory-naïve light environments that simulated either local photic conditions shorter daylength larger transitions photoperiods. All birds experienced geomagnetic conditions. hypothesized dunnocks inform predicted experimental treatment represented displacement north advancement towards winter at capture site compared control found, though, short photoperiods terminated expression of phenotype controls by reducing body mass gain ending activity, indicating integrates The incorporation may complement cues ensure correct time location. can also provide mechanism facilitates poleward shifts overwintering distribution under climate change allowing migrants overwinter newly suitable habitat higher latitude (i.e. stopping).

Language: Английский

Citations

0