Regulation of the Rhythmic Melatonin Secretion by Fish Pineal Photoreceptor Cells

Falcón, Jacky; Thibault, Christelle; Bégay, Valérie; Zachmann, Andreas; Collin, Jean‐Pierre

doi:10.1007/978-1-4615-3042-8_13

Cited by 70 publications

(54 citation statements)

References 55 publications

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“…En l'absence de phase obscure, une augmentation des taux horaires d'excrétion d'urée, d'amplitude plus faible, mais correspondant cependant à la phase obscure chez les animaux soumis à une alternance jour-nuit est observée : existerait-il un rythme endogène, calqué sur la photopériode, qui n'aurait pas encore disparu chez ces poissons stabulés deux mois dans ces conditions ? Des données récentes obtenues chez certains poissons téléostéens (brochet, Esox lucius ; poisson-zèbre, Brachydanio rerio ; daurade, Sparus aurata ; carassin, Carassius auratus) démontrent la présence de photorécepteurs dans la glande pinéale, contenant un pigment photosensible, « traducteur de l'effet lumière » et représentant une horloge (oscillateur circadien endogène) (BOLLIET et al, 1996), la mélatonine intervenant comme un « donneur de temps interne » (Zeitgeber) de l'organisme (FALCON et al, 1992). Au vu du rythme d'excrétion de l'urée, maintenu chez les turbots en éclairage constant, on peut très probablement imaginer qu'ils fonctionnent comme ces quatre espèces de téléostéen.…”

Section: Discussionunclassified

Capacités adaptatives du turbot (Psetta maxima) juvénile à la photopériode

Pichavant

Ruyet

Sévère

et al. 1998

Bull. Fr. Pêche Piscic.

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Section: Discussionunclassified

Capacités adaptatives du turbot (Psetta maxima) juvénile à la photopériode

Pichavant

Ruyet

Sévère

et al. 1998

Bull. Fr. Pêche Piscic.

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“…Many daily and seasonal rhythms are endogenously driven by the circadian system and synchronized by external cyclical cues with a stable periodicity, called zeitgebers (Falcon et al 1992;Sánchez-Vázquez et al 1995a;Madrid et al 2001). Under natural conditions (Bégout Anras 1995) as well as under controlled laboratory conditions (Sánchez-Vázquez et al 1995b;Aranda et al 1999), sea bass display a dual phasing behaviour in their circadian feeding pattern.…”

Section: Introductionmentioning

confidence: 99%

Individual fish rhythm directs group feeding: a case study with sea bass juveniles (Dicentrarchus labrax) under self-demand feeding conditions

Millot

Bégout

2009

Aquat. Living Resour.

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-The long term influence of individual biological rhythms on group feed demand behaviour was investigated in European sea bass (Dicentrarchus labrax) held under controlled environmental conditions with an on-demand feeding system. The experiment was realized over 219 days with 190 fish distributed on 4 tanks. Sea bass had a mean body mass comprised between 139 g to 183 g. The number of feed demand acts by each individual was calculated daily, and the population could thus be partitioned into three categories (high-, low-and zero-triggering fish). The duration of the period that an individual held high-triggering status could vary, but was 63 ± 16 days on average. The transition period between two highest-triggering fish in one tank was on average 4 ± 4 days. The group feeding rhythm followed the same pattern of feed demand rhythm as the highest-triggering individual fish. When the highest-triggering fish was nocturnal, the totality of feed demand in the group was realized during the night with one peak at 22:00, corresponding to dusk under experimental conditions. When the highest-triggering fish was diurnal, the majority of feed demand in the group was realized during the light period with one peak at 06:00, corresponding to dawn, and/or another at 12:00. This study therefore highlights that sea bass group feeding behaviour is not the sum of individual feed demand behaviours, but is directed by the rhythm and behaviour of a few high-triggering fish. The regular changes of high-triggering fish in the group proved that it was not the identity of these particular fish that was most important for the group, but their role as a feed demand leader. Key words:Feeding rhythms / Feed demand leader / Social interactions / Self-feeder / Dicentrarchus labrax Résumé -L'influence à long terme des rythmes biologiques individuels sur le comportement alimentaire du groupe est étudiée sur des bars européens (Dicentrarchus labrax) maintenus dans des conditions environnementales contrôlées et avec un système d'alimentation à la demande. L'expérience est réalisée sur 219 jours avec 190 poissons répartis dans 4 bassins. Les bars ont un poids corporel moyen compris entre 139 g à 183 g. Le nombre de demande alimentaire réalisée par chaque individu est calculé quotidiennement, et la population a pu être divisée en trois catégories (manipulateur principal, occasionnel et non manipulateur). La durée pendant laquelle un manipulateur principal reste actif peut varier, mais elle est en moyenne de 63 ± 16 jours. La période de transition entre deux manipulateurs principaux dans un bassin est en moyenne de 4 ± 4 jours. Le rythme alimentaire du groupe suit le même patron que celui du manipulateur principal. Lorsque le manipulateur principal est nocturne, la totalité des demandes alimentaires du groupe est réalisée pendant la nuit avec un pic à 22:00, correspondant au crépuscule dans les conditions expérimentales. Lorsque le manipulateur principal est diurne, la majorité des demandes alimentaires du groupe est réalisée pendant la périod...

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“…Salmonid species were used in the study because, in general, they are known to be ar rhythmic [5][6][7], and these 4 species, in partic ular, were chosen because they are of diverse evolutionary origins and in their natural hab itats they experience very different photoper iod conditions (the extreme being that of Arc tic charr which experiences a seasonal range of 0:24 LD to 24:0 LD).…”

Section: Introductionmentioning

confidence: 99%

“…As with all other vertebrate classes [4], the pineal gland of fishes secretes melatonin dur ing the dark phase [5][6][7], Melatonin release from the pineal gland of fishes occurs in vitro, for up to a week, and in some species, such as northern pike (Esox lucius) and white sucker (Catostomus commersoni), there is an in vitro endogenous circadian rhythmicity that per sists for several days [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

2-[<sup>125</sup>I]Iodomelatonin Binding in the Brains of Four Salmonids

et al. 1994

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[¹²⁵I]-Labelled iodomelatonin binding to brain membrane preparations was examined in adults of 4 species of salmonid fishes; 3 species were of cultured stock (Arctic charr, Atlantic salmon, rainbow trout) and 1 was taken from the wild (coho salmon). The specific binding of 2-[¹²⁵I]iodomelatonin to the brain membrane preparations collected from all 4 species was specific, stable, saturable, reversible and of high affinity. Competitive inhibition studies showed that only melatonin, 2-iodomelatonin, 6-chloromelatonin and N-acetylserotonin showed significant inhibition of radioligand binding. In the 4 species studied, the equilibrium dissociation constant (K_d) ranged from 9.3 ± 0.2 pmol/l in coho salmon to 13.2 ± 0.7 pmol/l in rainbow trout, and those in rainbow trout were significantly higher (p < 0.05) than in the others. The maximum number of binding sites (B_max) of the Atlantic salmon preparations (14.3 ± 0.7 fmol/mg protein) was significantly higher than those of the other 3 species (means rang-ing from 9.9 to 11.6 fmol/mg protein). Hill coefficients of all 4 species were close to unity indicating one class of binding site. The interspecies differences in K_d and B_max could not be correlated with phylogeny or life history of the various species. For the three cultured species, samples were collected at both mid-dark and mid-light to examine for diurnal variations; none were found.

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Regulation of the Rhythmic Melatonin Secretion by Fish Pineal Photoreceptor Cells

Cited by 70 publications

References 55 publications

Capacités adaptatives du turbot (Psetta maxima) juvénile à la photopériode

Capacités adaptatives du turbot (Psetta maxima) juvénile à la photopériode

Individual fish rhythm directs group feeding: a case study with sea bass juveniles (Dicentrarchus labrax) under self-demand feeding conditions

2-[<sup>125</sup>I]Iodomelatonin Binding in the Brains of Four Salmonids

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