The Circatidal Rhythm Persists without the Optic Lobe in the Mangrove Cricket <i>Apteronemobius asahinai</i>

Takekata, Hiroki; Numata, Hideharu; Shiga, Sakiko

doi:10.1177/0748730413516309

Cited by 18 publications

(10 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As in Eurydice , these gene knockdowns suggest that the two molecular oscillators underlying circadian and tidal rhythms are largely independent of each other. Moreover, surgical ablation of the optic lobes (likely location of the circadian oscillator) disrupted the circadian locomotor pattern, but as with the gene knockdown, the tidal rhythm remained intact [ 34 ]). Consequently, molecular mechanisms of the two oscillators not only may be independent, but also may reside in different groups of neurons.…”

Section: Molecular Studies Of Tidal Rhythmsmentioning

confidence: 99%

Marine biorhythms: bridging chronobiology and ecology

Bulla

Oudman

Bijleveld

et al. 2017

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

Marine organisms adapt to complex temporal environments that include daily, tidal, semi-lunar, lunar and seasonal cycles. However, our understanding of marine biological rhythms and their underlying molecular basis is mainly confined to a few model organisms in rather simplistic laboratory settings. Here, we use new empirical data and recent examples of marine biorhythms to highlight how field ecologists and laboratory chronobiologists can complement each other's efforts. First, with continuous tracking of intertidal shorebirds in the field, we reveal individual differences in tidal and circadian foraging rhythms. Second, we demonstrate that shorebird species that spend 8–10 months in tidal environments rarely maintain such tidal or circadian rhythms during breeding, likely because of other, more pertinent, temporally structured, local ecological pressures such as predation or social environment. Finally, we use examples of initial findings from invertebrates (arthropods and polychaete worms) that are being developed as model species to study the molecular bases of lunar-related rhythms. These examples indicate that canonical circadian clock genes (i.e. the homologous clock genes identified in many higher organisms) may not be involved in lunar/tidal phenotypes. Together, our results and the examples we describe emphasize that linking field and laboratory studies is likely to generate a better ecological appreciation of lunar-related rhythms in the wild.This article is part of the themed issue ‘Wild clocks: integrating chronobiology and ecology to understand timekeeping in free-living animals’.

show abstract

Section: Molecular Studies Of Tidal Rhythmsmentioning

confidence: 99%

Marine biorhythms: bridging chronobiology and ecology

Bulla

Oudman

Bijleveld

et al. 2017

Phil. Trans. R. Soc. B

View full text Add to dashboard Cite

show abstract

“…Moreover, circa(semi)lunar rhythms can be explained by beat reactions of circadian and circatidal clocks [ 21 ]. Whether a circadian clock is involved in the generation of these non-circadian rhythms has been examined in the above three species, but no experimental evidence supporting such involvement has been found [ 22 - 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…In crickets, the circadian clock is located in the lamina and medulla regions [ 74 ]. *It is likely that the circatidal clock is not located in the optic lobe, but is probably located in the central brain [ 28 ], although the possibility that the clock is located in an extra-brain region cannot be excluded. In Rhodnius prolixus (Heteroptera), lateral neurons, which co-express clock proteins and PDF, are considered to be the circadian clock that regulates the activity and hormone-release rhythms [ 75 , 76 ].…”

Section: Introductionmentioning

confidence: 99%

“…Physiological mechanisms generating circatidal rhythms have been examined mostly in crustaceans, and the results show that the circatidal clock or neurons under its control reside in the eyestalk [ 123 , 124 ]. In insects, Takekata et al [ 28 ] have recently examined the location of the circatidal clock in A. asahinai . This cricket living on the floor of mangrove forests shows a circatidal activity rhythm generating active and inactive phases and a circadian rhythm that modifies the circatidal rhythm by inhibiting activity during the subjective day.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Common features in diverse insect clocks

2015

Self Cite

View full text Add to dashboard Cite

This review describes common features among diverse biological clocks in insects, including circadian, circatidal, circalunar/circasemilunar, and circannual clocks. These clocks control various behaviors, physiological functions, and developmental events, enabling adaptation to periodic environmental changes. Circadian clocks also function in time-compensation for celestial navigation and in the measurement of day or night length for photoperiodism. Phase response curves for such clocks reported thus far exhibit close similarities; specifically, the circannual clock in Anthrenus verbasci shows striking similarity to circadian clocks in its phase response. It is suggested that diverse biological clocks share physiological properties in their phase responses irrespective of period length. Molecular and physiological mechanisms are best understood for the optic-lobe and mid-brain circadian clocks, although there is no direct evidence that these clocks are involved in rhythmic phenomena other than circadian rhythms in daily events. Circadian clocks have also been localized in peripheral tissues, and research on their role in various rhythmic phenomena has been started. Although clock genes have been identified as controllers of circadian rhythms in daily events, some of these genes have also been shown to be involved in photoperiodism and possibly in time-compensated celestial navigation. In contrast, there is no experimental evidence indicating that any known clock gene is involved in biological clocks other than circadian clocks.

show abstract

“…On the other hand, the remnants of PDF-IRNs were not correlated to the occurrence and free-running period of the circatidal rhythm. These results indicate that distinctly different brain regions drive circadian and circatidal rhythms and PDF-IRNs are dispensable for circatidal rhythm in A. asahinai [27 ] (Figure 4). Thus, the circatidal clock may represent a novel biological clock system that is distinct from the circadian clock at both the molecular and neural level in this species.…”

Section: Current Opinion Inmentioning

confidence: 84%