Role of the sinus gland in crayfish circadian rhythmicity—II. ERG circadian rhythm

Moreno‐Sáenz, Enrique; Hernández‐Falcón, Jesús; Fuentes‐Pardo, Beatriz

doi:10.1016/0300-9629(87)90434-8

Cited by 17 publications

(12 citation statements)

References 19 publications

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“…PDH even causes pigment dispersion in isolated retinae of the crayfish O. limosus (146) and P. clarkii (199). It was, therefore, presumed that the sinus gland system is the only source of PDH in circadian regulatory activity (21,116,217). Circadian variations have been found in the chromatophorotropic potencies and contents of various eyestalk visual ganglia of the prawn Palaemon paucidens, crayfish P. clarkii and the crab U. pugilator (116,155,(218)(219)(220).…”

Section: Crustacean Hyperglycaemic Hormone (Chh)mentioning

confidence: 99%

“…The sinus gland affects ERG rhythmicity, most likely by PDH acting on both the retinal DP and photoreceptors directly (122,217). The CPR can set the phase of the ERG rhythm upon prolonged abdominal illumination (298) and adjust it to a 24hr rhythm (84).…”

Section: Integration Of Distributed Circadian Clock Systems and Rhythmentioning

confidence: 99%

“…The XOSG system is itself a proper circadian oscillator (217), yet electrophysiological recordings from single cells do not necessarily show synchronous but differing phases for individual cells, perhaps because subsets are not electrically coupled and express different peptides (179). In crayfish, XOSG outputs affect locomotion (126,303), ERG amplitude and synchronisation (217), and the retinal pseudopupil (116).…”

Section: Integration Of Distributed Circadian Clock Systems and Rhythmentioning

confidence: 99%

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Circadian clocks in crustaceans: identified neuronal and cellular systems

Strauß

Dircksen²

2010

Front Biosci

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Circadian rhythms are known for locomotory and reproductive behaviours, and the functioning of sensory organs, nervous structures, metabolism and developmental processes. The mechanisms and cellular bases of control are mainly inferred from circadian phenomenologies, ablation experiments and pharmacological approaches. Cellular systems for regulation summarised here comprise the retina, the eyestalk neuroendocrine X-organ-sinus gland system, several neuropeptides such as red pigment concentrating, hyperglycaemic and pigment-dispersing hormones, and factors such as serotonin and melatonin. No master clock has been identified, but a model of distributed clockwork involves oscillators such as the retinular cells, neurosecretory systems in the optic lobes, putative brain pacemakers, and the caudal photoreceptor. Extraretinal brain photoreceptors mediate entrainment. Comparative analyses of clock neurons and proteins known from insects may allow the identification of candidate clock neurons in crustaceans as putative homologues in the two taxa. Evidence for the existence of "insect-like" intracellular clock proteins and (light sensitive) transcription factors is scarce, but clock-, period-, and cryptochrome-gene products have been localised in the CNS and other organs rendering further investigations into crustacean clockwork very promising.

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Section: Crustacean Hyperglycaemic Hormone (Chh)mentioning

confidence: 99%

Section: Integration Of Distributed Circadian Clock Systems and Rhythmentioning

confidence: 99%

Section: Integration Of Distributed Circadian Clock Systems and Rhythmentioning

confidence: 99%

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Circadian clocks in crustaceans: identified neuronal and cellular systems

Strauß

Dircksen²

2010

Front Biosci

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“…Circadian rhythms have been reported in a variety of physiological functions of crayfish ranging from behavioral [37-39,41,43] to cellular [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] and molecular levels [12][13][14][15][16][17][18][19]. Many of these are thought to be under the control of endogenous circadian oscillators.…”

Section: Discussionmentioning

confidence: 99%

“…Crustaceans have been known to show circadian rhythms in hormonal secretion [12][13][14][15], neurosecretion [16], biogenic amine contents and actions in the central nervous system [17][18][19], mechanoreceptor sensitivity [20], photoreceptor sensitivity [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] and locomotor activity [37][38][39][40][41][42][43]. A previous study in the crayfish Procambarus clarkii showed that the circadian rhythm in leg movement disappeared when the circumesophageal commissures were surgically lesioned bilaterally, thus experimentally demonstrating the importance of descending signals from the brain to posterior ganglia [38].…”

Section: Introductionmentioning

confidence: 99%

Chronic electromyographic analysis of circadian locomotor activity in crayfish

Tomina

Kibayashi

Yoshii

et al. 2013

Behavioural Brain Research

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Animals generally exhibit circadian rhythms of locomotor activity. They initiate locomotor behavior not only reflexively in response to external stimuli but also spontaneously in the absence of any specific stimulus. The neuronal mechanisms underlying circadian locomotor activity can, therefore, be based on the rhythmic changes in either reflexive efficacy or endogenous activity. In crayfish Procambarus clarkii, it can be determined by analyzing electromyographic (EMG) patterns of walking legs whether the walking behavior is initiated reflexively or spontaneously. In this study, we examined quantitatively the leg muscle activity that underlies the locomotor behavior showing circadian rhythms in crayfish. We newly developed a chronic EMG recording system that allowed the animal to freely behave under a tethered condition for more than 10 days. In the LD condition in which the animals exhibited LD entrainment, the rhythmic burst activity of leg muscles for stepping behavior was preceded by non-rhythmic tonic activation that lasted for 1323 ± 488 msec when the animal initiated walking. In DD and LL free-running conditions, the pre-burst activation lasted for 1779 ± 31 and 1517 ± 39 msec respectively. In the mechanical stimulus-evoked walking, the pre-burst activation ended within 79 ± 6 msec. These data suggest that periodic changes in the crayfish locomotor activity under the condition of LD entrainment or free-running are based on activity changes in the spontaneous initiation mechanism of walking behavior rather than those in the sensori-motor pathway connecting mechanoreceptors with leg movements.

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The circadian system of crayfish: A developmental approach

Fanjul‐Moles

Prieto-Sagredo

2003

Microscopy Res & Technique

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Adult crayfish exhibit a variety of overt circadian rhythms. However, the physiological mechanisms underlying the overt rhythms are controversial. Research has centered on two overt rhythms: the motor activity and the retinal sensitivity rhythms of the genus Procambarus. The present work reviews various studies undertaken to localize pacemakers and mechanisms of entrainment responsible for these two rhythms in adult organisms of this crustacean decapod. It also describes an ontogenetic approach to the problem by means of behavioral, electrophysiological, and neurochemical experiments. The results of this approach confirm previous models proposed for adult crayfish, based on a number of circadian pacemakers distributed in the central nervous system. However, the coupling of rhythmicity between these independent oscillators might be complex and dependent on the interaction between serotonin (5-HT), light, and the crustacean hyperglycemic hormone (CHH). The latter compound has, up until now, not been considered as an agent in the genesis and synchronization of the retinal sensitivity rhythm.

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Role of the sinus gland in crayfish circadian rhythmicity—II. ERG circadian rhythm

Cited by 17 publications

References 19 publications

Circadian clocks in crustaceans: identified neuronal and cellular systems

Circadian clocks in crustaceans: identified neuronal and cellular systems

Chronic electromyographic analysis of circadian locomotor activity in crayfish

The circadian system of crayfish: A developmental approach

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