Unexpected diversity in socially synchronized rhythms of shorebirds

  title={Unexpected diversity in socially synchronized rhythms of shorebirds},
  author={Martin Bulla and Mihai Valcu and Adriaan M. Dokter and Alexei Dondua and Andr{\'a}s Kosztol{\'a}nyi and Anne L. Rutten and Barbara Helm and Brett K. Sandercock and Bruce R. Casler and Bruno J. Ens and Caleb S. Spiegel and Chris J. Hassell and Clemens K{\"u}pper and Clive D. T. Minton and Daniel Burgas and David B. Lank and David C. Payer and Egor Y. Loktinov and Erica Nol and Eunbi Kwon and Fletcher Smith and H. River Gates and Hana Vitnerov{\'a} and Hanna Pr{\"u}ter and James A. Johnson and James J. H. St Clair and Jean‐François Lamarre and Jennie Rausch and Jeroen Reneerkens and Jesse R Conklin and Joana Burger and Joseph R. Liebezeit and Jo{\"e}l B{\^e}ty and Jon T. Coleman and Jordi Figuerola and Jos C.E.W. Hooijmeijer and Jos{\'e} A. Alves and Joseph A. M. Smith and Karel Weidinger and Kari Koivula and Ken Gosbell and Klaus‐Michael Exo and Larry Niles and Laura Koloski and Laura Mckinnon and Libor Praus and Marcel Klaassen and Marie-Andr{\'e}e Giroux and Martin Sl{\'a}de{\vc}ek and Megan L. Boldenow and Michael I. Goldstein and Miroslav E {\vS}{\'a}lek and Nathan R. Senner and Nelli R{\"o}nk{\"a} and Nicolas Lecomte and Olivier Gilg and Orsolya Vincze and Oscar Johnson and Paul A. Smith and Paul F Woodard and Pavel S Tomkovich and Phil F. Battley and Rebecca Bentzen and Richard B. Lanctot and Ronald R. Porter and Sarah T. Saalfeld and Scott L. Freeman and Stephen Brown and Stephen M. Yezerinac and Tam{\'a}s Sz{\'e}kely and Tom{\'a}s Montalvo and Theunis Piersma and Vanessa Loverti and Veli‐Matti Pakanen and Wim Tijsen and Bart Kempenaers},
The behavioural rhythms of organisms are thought to be under strong selection, influenced by the rhythmicity of the environment. Such behavioural rhythms are well studied in isolated individuals under laboratory conditions, but free-living individuals have to temporally synchronize their activities with those of others, including potential mates, competitors, prey and predators. Individuals can temporally segregate their daily activities (for example, prey avoiding predators, subordinates… 

Behavioural rhythms and parental cooperation in biparentally incubating shorebirds

  • M. Bulla
  • Biology, Environmental Science
  • 2017
B biparental care – a complex social behaviour and a particularly sensitive phase of social synchronization – in which pair members potentially compromise their individual rhythms is addressed, and results suggest that parents communicate only during their brief exchange on the nest.

Diversity of incubation rhythms in a facultatively uniparental shorebird – the Northern Lapwing

Substantial between nest differences in Lapwing male nest attendance are confirmed, how such differences relates to variation in incubation rhythms are revealed, and strong circadian incubation rhythm modulated by sunrise and sunset is described.

Marine biorhythms: bridging chronobiology and ecology

New empirical data and recent examples of marine biorhythms are used to highlight how field ecologists and laboratory chronobiologists can complement each other's efforts and indicate that canonical circadian clock genes may not be involved in lunar/tidal phenotypes in the wild.

Social synchronization of circadian rhythms with a focus on honeybees

Findings reveal remarkable sensitivity to social time-giving cues and show that bees with attenuated rhythms (weak oscillators) can nevertheless be socially synchronized to a common phase of activity.

Diverse incubation rhythms in a facultatively uniparental shorebird – the Northern Lapwing

Strong circadian rhythms and remarkable between nest differences in Northern Lapwing incubation (especially in male involvement) are revealed, yet despite seasonal environmental trends (e.g. increasing temperature) LapWing incubation rhythms remained relatively stable over the season and incubation period.

Daily Rhythms of Female Self-maintenance Correlate with Predation Risk and Male Nest Attendance in a Biparental Wader

Investigating the daily rhythms of sleep and feather preening in incubating females of the Northern Lapwing, a wader with a highly variable male contribution to incubation, found that the female's sleep frequency peaked after sunrise and before sunset but was low in the middle of the day and especially during the night.

The evolutionary ecology of circadian rhythms in infection

How hosts use rhythms to defend against infection, why parasites have rhythms and whether parasites can manipulate host clocks to their own ends are explored and an interdisciplinary effort to drive this emerging field forward is proposed.

Individual Ants Do Not Show Active-rest Rhythms in Natural Nest Conditions

An image-based tracking system using 2D barcodes for Diacamma sp.

Individual Ants Do Not Show Activity-Rest Rhythms in Nest Conditions

An image-based tracking system using 2D barcodes for Diacamma cf.

Flexible parental care: Uniparental incubation in biparentally incubating shorebirds

It is demonstrated that after the disappearance of one parent, individuals from 8 out of 15 biparentally incubating shorebird species were able to incubate uniparentally for 1–19 days (median = 3, N’s = 69), which reveals the potential for a flexible switch from biparental to unIParental care.



Socially synchronized circadian oscillators

Three model systems that are now being applied to understanding the biology of socially synchronized circadian oscillators are highlighted: the fruitfly with its powerful array of molecular genetic tools; the honeybee with its complex natural society and clear division of labour; and, at a different level of biological organization, the rodent suprachiasmatic nucleus, site of the brain's circadian clock, with its network of mutually coupled single-cell oscillators.

Social synchronization of circadian rhythmicity in female mice depends on the number of cohabiting animals

It is speculated that the social coupling of individual circadian clocks of group members may be adaptive under certain conditions, and it is proposed that optimal group sizes in nature may depend not only on species-specific energetics, spatial behaviour and natural history but also on the mathematics of synchronizing assemblies of weakly coupled animal oscillators.

When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds

The results support the idea that circadian behaviour can be adaptively modified to enable species-specific time-keeping under polar conditions, and show that the free-running rhythm is synchronized between pair mates.

Animal clocks: when science meets nature

The seven papers in this Special Feature of Proceedings of the Royal Society B take on this challenge, reviewing the influences of moonlight, latitudinal clines, evolutionary history, social interactions, specialized temporal niches, annual variation and recently appreciated post-transcriptional molecular mechanisms.

Factors Affecting Incubation Patterns and Sex Roles of Black Oystercatchers in Alaska

It is suggested that the sexes incubate in different but complementary patterns, facilitating efficient egg care in a dynamic environment with several nest threats, and the importance of considering natural influences when human threats to shorebird reproductive behavior and success are evaluated.

Reproductive Mechanisms: Interaction of Circadian and Interval Timing a

The term interval timer is used to refer to a mechanism that times behavioral or physiological events of durations shorter than 24 hours and that do not oscillate or automatically reset.

Heritable circadian period length in a wild bird population

  • B. HelmM. Visser
  • Biology, Psychology
    Proceedings of the Royal Society B: Biological Sciences
  • 2010
Natural variation of circadian traits in a songbird, the great tit, is studied by recording locomotor activity of 98 hand-raised, wild-derived individuals and it is found that the free-running period of this diurnal species was significantly shorter than 24 h in constant dim light.