Effect of dietary lipid content on circadian rhythm of feeding activity in European sea bass

Boujard, Thierry; Gélineau, Anne; Corraze, Généviève; Kaushik, Sadasivam; Gasset, Eric; Covès, Denis; Dutto, Gilbert

doi:10.1016/s0031-9384(99)00234-6

Cited by 23 publications

(26 citation statements)

References 29 publications

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“…They confirmed the great flexibility in daily feeding rhythms of sea bass (Boujard et al, 1996;Azzaydi et al, 1998). The regulation of feed intake was controlled by a satiation mechanism, but feeding activity was driven by an endogenous clock (Boujard et al, 2000). During the day 1-19 phase, the lower peak of ingestion recorded during the first hour of day light was the main cause of the overall decrease in VFI.…”

Section: Effect Of Ammonia On Un-acclimated Fish (Period 1 Day 0-19)supporting

confidence: 55%

“…The usual observations made when feeding fish after a period of starvation or feed restriction were observed during the third period: hyperphagy (Saether and Jobling, 1999;Xie et al, 2001), compensatory growth (Weatherley and Gill, 1981;Dobson and Holmes, 1984;Pastoureaud, 1991), absence of increase in the CV of weight (Jobling and Koskela, 1996;Jobling et al, 1999), and improved feed efficiency (Boujard et al, 2000). Our study is original in the sense that feed restriction was a consequence of an external pollutant and that the fish were free to regulate their feeding level.…”

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 75%

“…This recurring observation seems to be independent from the cause: temperature (Pastoureaud, 1991;Nicieza and Metcalfe, 1997), partial feed restriction (Jobling and Koskela, 1996;Nicieza and Metcalfe, 1997;Saether and Jobling, 1999), full starvation (Rueda et al, 1998;Boujard et al, 2000;Wang et al, 2000) or pollutants (Jobling, 1994). The duration and intensity of food deprivation have an effect on the subsequent compensation.…”

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 99%

“…This dependence was higher during the day 71-93 phase than during the 93-114 phase, indicating that the phenomenon of hyperphagia was limited with time. Nicieza and Metcalfe (1997) reported that the timing and duration of increased food intake rates were dependent upon the physiological status of the fish (in their case premigratory and non-migratory Atlantic salmon) and to the past nutritional history of the fish (Boujard et al, 2000). Increased feeding levels have been attributed to the increase of the duration of the daily feeding period (Nicieza and Metcalfe, 1997).…”

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 99%

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Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax)

Dosdat

2003

Aquatic Living Resources

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The chronic effects of exposing sea bass (average initial weight 100 g) to ammonia in water at 22°C were first evaluated over a 61-day period (period 1, P1) during which nine different groups were submitted to nine ambient ammonia levels ranging from 0.014 to 0.493 mg l -1 NH 3 -N (0.53-16.11 mg l -1 total ammonia nitrogen (TA-N)) and fed using self-feeders. At the end of P1, the fish were starved for 10 days (P2). Their recovery capacity was tested over 43 days (P3) after which the exogenous ammonia supply was stopped in all treatments and the fish were allowed to feed. After 20 days of exposure a highly significant effect of ammonia was evident from the decrease in feeding activity, voluntary feed intake (VFI) and specific growth rate (SGR), and the increase in the feed conversion ratio (FCR). Ammonia exposure had no effect on circadian feeding rhythm or hourly actuation profiles. At the end of P1, the fish seemed to have adapted to all ambient ammonia concentrations tested since feeding and growth parameters were independent of ammonia levels. But they were unable to compensate for growth losses. Physiological adjustments were observed: plasma TA-N concentrations were positively related to ambient TA-N while there was no major disturbance in plasma urea. Plasma tri-iodo-thyronine concentrations were affected by ambient ammonia concentrations and there were no significant changes in hydromineral balance. During P2, oxygen consumption and urea excretion did appear to have been affected by ambient ammonia. When the exogenous supply of ammonia was stopped (P3), fish exhibited hyperphagia and compensatory growth. In fish previously exposed to the highest ammonia levels, SGR and VFI were highest, and their FCR was improved. At the end of the experiment the final average weights were similar in all of the treatments (range 337-396 g). Depending on the concentrations used, ammonia exposure may enhance subsequent fish appetite and growth rate and have a similar effect on growth performances as restricting feeding level. Within the range tested, no detrimental effect of ammonia on the metabolic capacity of the fish, measured by oxygen consumption and urea excretion, or on their physiological status was recorded, and the fish had a good recovery capacity. In the conditions of the experiment, the non-observable effect concentration (NOEC) was 6 mg l -1 .

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Section: Effect Of Ammonia On Un-acclimated Fish (Period 1 Day 0-19)supporting

confidence: 55%

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 75%

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 99%

Section: Return To Ammonia-free Conditions (Period 3)mentioning

confidence: 99%

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Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax)

Dosdat

2003

Aquatic Living Resources

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“…This pattern corroborates previous observations made in the same fish species (Bégout-Anras, 1995;Madrid et al, 1997;Aranda et al, 1999a,b;Boujard et al, 2000;Paspatis et al, 2003;Rubio et al, 2003). Indeed, European sea bass is well known to present a diurnal feed rhythm in spring and summer but a nocturnal one in autumn and winter (Sánchez-Vásquez et al, 1998;Rubio et al, 2004).…”

Section: Feed Rhythm and Specific Growth Ratesupporting

confidence: 91%

No efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)

et al. 2006

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In order to evaluate the effect and consequence of lateral system inactivation on fish nocturnal feeding, the differential growth of groups of European sea bass maintained in different rearing conditions were compared. Whereas some fish with intact lateral system (placebo fish) were placed under a photoperiod of 12-L : 12-D, other placebo fish were kept in the dark. In the same way, fish deprived of lateral system by section of their lateral system nerves and antibiotic treatment were placed under a photoperiod of 12-L : 12-D and the others in the dark. For each of these four rearing conditions, two sets of experiment were realized. Percent mortality, feed rhythm, averaged daily feed demand, specific growth rate and feed efficiency were compared among these four groups of fish. After four months of experiment, results revealed that, under a photoperiod of 12-L : 12-D, fish showed a diurnal feed rhythm whereas no rhythm appeared in fish kept in the dark. In addition, as reported by other authors, the average daily feed demand, the quantity of ingested food and specific growth rate were greater in fish maintained under a photoperiod of 12-L : 12-D than those kept in the dark. The fish lateral system inactivation did not affect mortality, feed intake, specific growth rate or feed efficiency. These results demonstrated that lateral system is not the major sensory organ leading to European sea bass nocturnal feeding; chemoreception system undoubtedly taking over. If the olfactory system explains equal feed intake between placebo and treated fish, the greater specific growth rate in treated than in placebo fish indicates the action of another mechanism, such as a bbooster effectQ of antibiotics used for lateral system inactivation on fish. D

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Postmortem Degradation of White Fish Skeletal Muscle (Sea Bass, Dicentrarchus labrax): Fat Diet Effects on In Situ Dystrophin Proteolysis During the Prerigor Stage

Bonnal

Raynaud

Astier

et al. 2001

Marine Biotechnology

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All during fish postmortem evolution, structural muscle proteins are targets for various proteases. During the prerigor period (24 hours at 4 degrees C for sea bass), cytoskeletal proteins are affected by the first proteolytic events. These cleavages disrupt connections between myofibrils and the extracellular matrix, induce segmentation of myofibril cores, and modify the rheological properties of tissue. Dystrophin, a cytoskeletal actin-binding protein, is a relevant in situ marker for muscular proteolysis in the prerigor period. The immunodetection of dystrophin allowed the monitoring of early proteolysis during fish storage. Using antidystrophin antibodies directed toward the carboxy-terminal region, a highly sensitive domain exposed to calpain activity, we showed that proteolysis kinetics are strongly influenced by the muscular lipid content. In particular, comparison between low-fat diets (11.3% lipid) and high-fat diets (30% lipid), used during sea bass farming (90 days), revealed a faster proteolysis rate during the first 8 hours of storage at 0 degrees C with the high-fat diet. The origin of this faster proteolysis is discussed on the basis of a possible activation or translocation of calpains related to lipid accumulation in muscle fibers and cytoskeleton alterations.

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Effect of dietary lipid content on circadian rhythm of feeding activity in European sea bass

Cited by 23 publications

References 29 publications

Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax)

Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax)

No efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)

Postmortem Degradation of White Fish Skeletal Muscle (Sea Bass, Dicentrarchus labrax): Fat Diet Effects on In Situ Dystrophin Proteolysis During the Prerigor Stage

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