Zur Aktivit�tsperiodik bei H�hlentieren

Blume, J.; Bünning, Erwin; Günzler, E.

doi:10.1007/bf00636364

Cited by 31 publications

(10 citation statements)

References 2 publications

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“…A partial or complete loss of endogenous circadian rhythms may be expected in organisms living in such caves (Bünning 1973). Blume et al (1962) did not find any clear-cut diurnal rhythmicity in the locomotor activity of an eyeless cave-crayfish, Niphargus puteanus. However, a few scattered components of activity with periods ranging from 10h to 57h were seen in some individuals.…”

Section: Discussionmentioning

confidence: 89%

“…In an early study, it was reported that there was no discernible rhythm in the locomotor activity of an arctic cave crayfish, Cambarus pellucidus (Park et al 1941), which had apparently existed inside cave conditions for over 25,000 generations. The cave crayfish Niphargus puteanus also lacked a clear-cut circadian rhythmicity (Blume et al 1962). The locomotor activity of the beetle Carabus violaceus was arrhythmic during the Arctic summer (LL) and in imposed LD cycles (Hempel and Hempel 1959).…”

Section: Introductionmentioning

confidence: 99%

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PRESENCE OF CIRCADIAN RHYTHMS IN THE LOCOMOTOR ACTIVITY OF A CAVE-DWELLING MILLIPEDEGLYPHIULUS CAVERNICOLUS SULU(CAMBALIDAE, SPIROSTREPTIDA)

Koilraj

Sharma

Marimuthu

et al. 2000

Chronobiology International

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The locomotor activity of the millipede Glyphiulus cavernicolus (Spirostreptida), which occupies the deeper recesses of a cave, was monitored in light-dark (LD) cycles (12h light and 12h darkness), constant darkness (DD), and constant light (LL) conditions. These millipedes live inside the cave and are apparently never exposed to any periodic factors of the environment such as light-dark, temperature, and humidity cycles. The activity of a considerable fraction of these millipedes was found to show circadian rhythm, which entrained to a 12:12 LD cycle with maximum activity during the dark phase of the LD cycle. Under constant darkness (DD), 56.5% of the millipedes (n = 23) showed circadian rhythms, with average free-running period of 25.7h +/- 3.3h (mean +/- SD, range 22.3h to 35.0h). The remaining 43.5% of the millipedes, however, did not show any clear-cut rhythm. Under DD conditions following an exposure to LD cycles, 66.7% (n = 9) showed faint circadian rhythm, with average free-running period of 24.0h +/- 0.8h (mean +/- SD, range 22.9h to 25.2h). Under constant light (LL) conditions, only 2 millipedes of 11 showed free-running rhythms, with average period length of 33.3h +/- 1.3h. The results suggest that these cave-dwelling millipedes still possess the capacity to measure time and respond to light and dark situations.

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

PRESENCE OF CIRCADIAN RHYTHMS IN THE LOCOMOTOR ACTIVITY OF A CAVE-DWELLING MILLIPEDEGLYPHIULUS CAVERNICOLUS SULU(CAMBALIDAE, SPIROSTREPTIDA)

Koilraj

Sharma

Marimuthu

et al. 2000

Chronobiology International

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“…In addition, such a conclusion would benefit from a considerably greater understanding of how the core clock mechanism actually links to the regulation of different outputs in fish. It is interesting to note that previous studies on cave animals, such as amphipods and salamanders, have examined behaviour to suggest that circadian rhythms are lost 9,43 . It would be interesting to re-examine those species at the molecular clock level in the light of the gene expression data presented here.…”

Section: Discussionmentioning

confidence: 99%

“…It has therefore been the generally held view that cave or deep sea animals that have evolved in a constant dark environment have no need for a functional clock and, in fact, no longer possess one. Although this makes apparent sense, there are relatively few studies that have examined circadian clocks in cave species, less that have studied the molecular nature of these clocks and none that have done so under native cave conditions in the wild [1][2][3][4][5][6][7][8][9] .…”

mentioning

confidence: 99%

Circadian rhythms in Mexican blind cavefish Astyanax mexicanus in the lab and in the field

et al. 2013

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Biological clocks have evolved as an adaptation to life on a rhythmic planet, synchronising physiological processes to the environmental light-dark cycle. Here we examine circadian clock function in Mexican blind cavefish Astyanax mexicanus and its surface counterpart. In the lab, adult surface fish show robust circadian rhythms in per1, which are retained in cave populations, but with substantial alterations. These changes may be due to increased levels of light-inducible genes in cavefish, including clock repressor per2. From a molecular standpoint, cavefish appear as if they experience 'constant light' rather than perpetual darkness. Micos River samples show similar per1 oscillations to those in the lab. However, data from Chica Cave shows complete repression of clock function, while expression of several lightresponsive genes is raised, including DNA repair genes. We propose that altered expression of light-inducible genes provides a selective advantage to cavefish at the expense of a damped circadian oscillator.

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“…Nevertheless, cell culture based experiments give some suggestion that P. andruzzii exhibits rhythms in the infradian range (Cavallari et al 2011). This is a possible condition for other cave animals: rhythms of a non-circadian range are observed in Schistura oedipus (Duboué and Borowsky 2012) and Niphargus puteanus (Blume et al 1962). However, it would be interesting to see the responses of these animals to non-photic zeitgebers.…”

Section: A Review Of Rhythmic Physiology Research In Animals From Arrmentioning

confidence: 99%

Life in a dark biosphere: a review of circadian physiology in “arrhythmic” environments

2016

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Most of the life with which humans interact is exposed to highly rhythmic and extremely predictable changes in illumination that occur with the daily events of sunrise and sunset. However, while the influence of the sun feels omnipotent to surface dwellers such as ourselves, life on earth is dominated, in terms of biomass, by organisms isolated from the direct effects of the sun. A limited understanding of what life is like away from the sun can be inferred from our knowledge of physiology and ecology in the light biosphere, but a full understanding can only be gained by studying animals from the dark biosphere, both in the laboratory and in their natural habitats. One of the least understood aspects of life in the dark biosphere is the rhythmicity of physiology and what it means to live in an environment of low or no rhythmicity. Here we describe methods that may be used to understand rhythmic physiology in the dark and summarise some of the studies of rhythmic physiology in “arrhythmic” environments, such as the poles, deep sea and caves. We review what can be understood about the adaptive value of rhythmic physiology on the Earth’s surface from studies of animals from arrhythmic environments and what role a circadian clock may play in the dark.

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Zur Aktivit�tsperiodik bei H�hlentieren

Cited by 31 publications

References 2 publications

PRESENCE OF CIRCADIAN RHYTHMS IN THE LOCOMOTOR ACTIVITY OF A CAVE-DWELLING MILLIPEDEGLYPHIULUS CAVERNICOLUS SULU(CAMBALIDAE, SPIROSTREPTIDA)

PRESENCE OF CIRCADIAN RHYTHMS IN THE LOCOMOTOR ACTIVITY OF A CAVE-DWELLING MILLIPEDEGLYPHIULUS CAVERNICOLUS SULU(CAMBALIDAE, SPIROSTREPTIDA)

Circadian rhythms in Mexican blind cavefish Astyanax mexicanus in the lab and in the field

Life in a dark biosphere: a review of circadian physiology in “arrhythmic” environments

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