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photoperiod

  • RESEARCH ARTICLE
    Ambient temperature affects multiple drivers of physiology and behaviour: adaptation for timely departure of obligate spring migrants
    Sayantan Sur, Khushboo Chaturvedi, Aakansha Sharma, Shalie Malik, Sangeeta Rani, Vinod Kumar
    Journal of Experimental Biology 2020 223: jeb236109 doi: 10.1242/jeb.236109 Published 21 December 2020

    Editor's choice: Songbirds use temperature in the behavioral decision of when to migrate from wintering areas. Transcriptional responsiveness to temperature is a significant component of the overall adaptive strategy for spring migration.

  • RESEARCH ARTICLE
    Photoperiodic regulation in a wild-derived mouse strain
    Cristina Sáenz de Miera, Matthew Beymer, Kevin Routledge, Elżbieta Król, Colin Selman, David G. Hazlerigg, Valérie Simonneaux
    Journal of Experimental Biology 2020 223: jeb217687 doi: 10.1242/jeb.217687 Published 25 March 2020

    Summary: Mus musculus molossinus are wild-derived melatonin-proficient mice that display photoperiodic changes in reproductive organs and body mass, enhanced by gestational experience and associated with corresponding changes in pituitary and hypothalamic gene expression.

  • COMMENTARY
    Circadian rhythms and environmental disturbances – underexplored interactions
    Jenni M. Prokkola, Mikko Nikinmaa
    Journal of Experimental Biology 2018 221: jeb179267 doi: 10.1242/jeb.179267 Published 22 August 2018

    Summary: Human-induced changes in temperature, chemical discharge, eutrophication of water and the associated depletion of oxygen may disrupt the integration between circadian rhythms and other functions in animals. This possibility should be considered more thoroughly in studies addressing the environmental responses of animals.

  • RESEARCH ARTICLE
    Cold temperature represses daily rhythms in the liver transcriptome of a stenothermal teleost under decreasing day length
    Jenni M. Prokkola, Mikko Nikinmaa, Mario Lewis, Katja Anttila, Mirella Kanerva, Kaisa Ikkala, Eila Seppänen, Irma Kolari, Erica H. Leder
    Journal of Experimental Biology 2018 221: jeb170670 doi: 10.1242/jeb.170670 Published 12 March 2018

    Summary: Transcriptomic profiling of liver tissue in a cold-adapted fish suggests tight coupling of temperature responses and daily rhythms.

  • SHORT COMMUNICATION
    Waiting for the Sun: the circannual programme of reindeer is delayed by the recurrence of rhythmical melatonin secretion after the arctic night
    David Hazlerigg, Arnoldus Schytte Blix, Karl-Arne Stokkan
    Journal of Experimental Biology 2017 220: 3869-3872; doi: 10.1242/jeb.163741

    Summary: Exposure to constant light or constant darkness accelerates the onset of spring physiology in overwintering reindeer; this has implications for current models of circannual time-keeping in mammals.

  • RESEARCH ARTICLE
    Role of GnIH in photoperiodic regulation of seasonal reproduction in the Eurasian tree sparrow
    Anand S. Dixit, Namram S. Singh, Sanborlang Byrsat
    Journal of Experimental Biology 2017 220: 3742-3750; doi: 10.1242/jeb.164541

    Summary: GnIH is an important part of the mechanism by which photoperiod regulates seasonal reproduction in birds.

  • RESEARCH ARTICLE
    Photoperiod but not food restriction modulates innate immunity in an opportunistic breeder, Loxia curvirostra
    Elizabeth M. Schultz, Thomas P. Hahn, Kirk C. Klasing
    Journal of Experimental Biology 2017 220: 722-730; doi: 10.1242/jeb.149898

    Summary: Long day lengths and induced sickness, but not food restriction, increase multiple measures of innate immunity in the red crossbill, an opportunistically breeding bird.

  • REVIEW
    Adaptations to polar life in mammals and birds
    Arnoldus Schytte Blix
    Journal of Experimental Biology 2016 219: 1093-1105; doi: 10.1242/jeb.120477

    Summary: Polar animals are well adapted to the hardships of polar life.

  • RESEARCH ARTICLE
    Negative energy balance in a male songbird, the Abert's towhee, constrains the testicular endocrine response to luteinizing hormone stimulation
    Scott Davies, Sisi Gao, Shelley Valle, Stephanie Bittner, Pierce Hutton, Simone L. Meddle, Pierre Deviche
    Journal of Experimental Biology 2015 218: 2685-2693; doi: 10.1242/jeb.123042

    Summary: Energy deficiency in an adult male songbird has no detectable effect on the development of reproductive morphology, but constrains the endocrine responsiveness of the testes.

  • RESEARCH ARTICLES
    Relative roles of temperature and photoperiod as drivers of metabolic flexibility in dark-eyed juncos
    David Swanson, Yufeng Zhang, Jin-Song Liu, Christopher L. Merkord, Marisa O. King
    Journal of Experimental Biology 2014 217: 866-875; doi: 10.1242/jeb.096677

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