Migration gives sleepless nights to the birds: a study on a Palaearctic–Indian migrant, Emberiza bruniceps

Yadav, Anupama; Tiwari, Jyoti; Vaish, Vaibhav; Malik, Shalie; Rani, Sangeeta

doi:10.1007/s10336-020-01829-x

Cited by 6 publications

(9 citation statements)

References 29 publications

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“…With the progression of night, back sleep dominated the bars'. Since, back sleep posture is indicative of deep sleep in birds (Yadav et al 2021, Ferretti et al 2019, thus it can be speculated that with the progression of night diurnal birds indulge in deep sleep activity. The transition preceded by late night observation showed 50 percent abundance of front and back sleep postures, while the remaining bar was occupied by drowsiness followed by alert wakefulness.…”

Section: Discussionmentioning

confidence: 99%

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Effect of artificial light at night on sleep and metabolism in weaver birds

Yadav

Kumar

Tiwari

et al. 2022

Environ Sci Pollut Res

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Artificial light at night is constantly minimizing the span of dark nights' from the natural lightdark cycle of earth. Over the past century, the 'lightscape' of earth has completely changed owing to technological advancements which subsequently changed the lifestyle of human as well as the nearby animal species. This motivated the present study, wherein we investigated the impact of light at night (LAN) on behavior and physiology of a diurnal passerine finch, baya weaver (Ploceus philippinus). A group of bird (N=10) exposed to 12L:12D photoperiod was initially subjected to dark nights (0 lux) for a period of 10 days followed by 5 lux; night light for a span of 4 weeks. First week in LAN served as acute treatment with respect to fourth week (chronic). Acute exposure had more pronounced impact on the behavioral and physiological observations when compared with chronic treatment. The results reveal significant increase in nighttime activity, sleep loss, significant inclusion of drowsiness behavior during the day in response to LAN. Beside these behavioral alterations, changes in physiological parameters such as; reduction in body mass, loss of gradient between pre-and post-prandial blood glucose levels, elevation in plasma corticosterone levels were more prominent during acute exposure of LAN.Plasma metabolites such as triglycerides, total protein, serum glutamic-oxaloacetic transaminase (SGOT) and creatinine concentrations also hiked in response to LAN treatment. Thus, the study broadly enumerates the impact of acute and chronic exposure of LAN on behavior (rest/sleep) and physiology (metabolism) of birds'.

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Section: Discussionmentioning

confidence: 99%

“…Sleep behavior was recorded following Yadav et al (2021). Briefly, birds were monitored for different active and sleep behaviors during a 24 hour day.…”

Section: Sleep Behaviormentioning

confidence: 99%

Effect of artificial light at night on sleep and metabolism in weaver birds

Yadav

Kumar

Tiwari

et al. 2022

Environ Sci Pollut Res

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“…This was further modified to classify the sleep postures in redheaded buntings ( Emberiza bruniceps ) [17]. In both studies, the authors found an increase in night-time alert wakefulness and a decrease in front and back sleep in the migratory state [16,17]. Similar results have been obtained in EEG studies in captive white-crowned sparrows ( Zonotrichia leucophrys gambelii ), [18] and thrushes [19].…”

Section: Introductionmentioning

confidence: 79%

“…They compensated for this loss of sleep, by increasing the front sleep, back sleep and UHS in the daytime during migration, which was practically negligible during the other LHS. Fuchs et al [16,17] reported similar daytime micro naps in Swainson's thrush from EEG and behavioural recordings, where brief episodes of daytime sleep compensated for the extended periods of sleep loss. Future studies on migratory buntings can greatly benefit from additional EEG recordings alongside video monitoring data, which is a shortcoming of the current study.…”

Section: Discussionmentioning

confidence: 98%

Photoperiod-driven concurrent changes in hypothalamic and brainstem transcription of sleep and immune genes in migratory redheaded bunting

et al. 2023

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The molecular regulation of sleep in avian migrants is still obscure. We thus investigated this in migratory redheaded buntings, where four life-history states (LHS; i.e. non-migratory, pre-migratory, migratory and refractory states) were induced. There was increased night-time activity (i.e. Zugunruhe ) during the migratory state with reduced daytime activity. The recordings of the sleep–wake cycle in buntings showed increased night-time active wakefulness coupled with drastically reduced front and back sleep during migratory phase. Interestingly, we found the buntings to feed and drink even after lights-off during migration. Gene expression studies revealed increased hypothalamic expression of glucocorticoid receptor ( nr3c1 ), and pro-inflammatory cytokines ( il1b and il6 ) in pre-migratory and migratory states, respectively, whereas in brainstem Ca 2+ /calmodulin-dependent protein kinase 2 ( camk2 ) was upregulated during the migratory state. This suggested a heightened pro-inflammatory state during migration which is a feature of chronic sleep loss, and a possible role of Ca 2+ signalling in promoting wakefulness. In both the hypothalamus and brainstem, the expression of melatonin receptors ( mel1a and mel1b ) was increased in the pre-migratory state, and growth hormone-releasing hormone ( ghrh , known to induce sleep) was reduced during the migratory state. The current results demonstrate key molecules involved in the regulation of sleep–wake cycle across LHS in migratory songbirds.

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“…Birds that flew further before roosting experienced more nighttime disturbance. This may be linked to some level of tiredness that negatively affects deep sleep (Bringmann 2018), also in migratory birds (Berthold 2001, Yadav et al 2021). This indicates that daily migration has an influence on roosting and probably vice‐versa (Berthold 2001, Kaatz 2004, Alerstam 2009).…”

Section: Discussionmentioning

confidence: 99%

Secrets of the night: roost sites and sleep disturbance factors during the autumn migration of first‐year white storkCiconia ciconia

Siekiera¹,

Jankowiak

Profus

et al. 2022

Journal of Avian Biology

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The migration phase of birds is divided into two main states: stopovers and actual migratory flights. For soaring birds, such as storks, nighttime is especially important to conserve energy and to start the next day in favourable weather conditions. Although there is a large number of recent studies on white stork Ciconia ciconia, for example using advanced technologies such as GPS technology, the nocturnal behaviour of the species is still an enigma. Thus, we GSM–GPS‐tagged 90 immature storks and checked their nocturnal behaviour, especially roost disturbance, during their first autumn migration from breeding grounds in southern Poland to wintering places in Africa. Storks roosted on three types of site: on buildings, on the ground or in trees. Birds that roosted on the ground had a higher probability of nighttime disturbance than those that used trees or buildings. The probability of disturbance at night was also related to longitude and latitude; the most easterly birds and those at the start of the migration route were disturbed more often during the night. Furthermore, and interestingly, environmental conditions at roosts were also significantly related to the probability of disturbance; birds roosting at tree sites with higher NDVI (greener) and with higher levels of artificial light both had a lower probability of disturbance. A possible explanation of this could be related to lower potential predatory pressure at night. We found that after long flights birds were disturbed more often at night, and that disturbed birds migrated further the next day. For a better understanding of the nocturnal behaviour of storks, as well as of other migratory birds, the use of modern technological tools with greater precision is recommended.

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Migration gives sleepless nights to the birds: a study on a Palaearctic–Indian migrant, Emberiza bruniceps

Cited by 6 publications

References 29 publications

Effect of artificial light at night on sleep and metabolism in weaver birds

Effect of artificial light at night on sleep and metabolism in weaver birds

Photoperiod-driven concurrent changes in hypothalamic and brainstem transcription of sleep and immune genes in migratory redheaded bunting

Secrets of the night: roost sites and sleep disturbance factors during the autumn migration of first‐year white storkCiconia ciconia

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