Consulta: creatorFacets:"Dutto, Gilbert"
Registros recuperados: 30
Data/hora: 10/06/2024 09:06:07

VALDORA 2018. Etude de la perte de poids au jeûne sur deux classes de poids de dorades sauvages, Sparus aurata, maintenues en vivier
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Dutto, Gilbert; Geoffroy, Thibault.
L’étude a été menée sur deux classes de poids (260-450g et 460-980 g) de dorades sauvages maintenues à jeun en vivier pendant 40 jours après 3 semaines de captivité en cages sans alimentation. Au cours de cette phase de captivité les conditions de température ont progressivement évolué de 16.5 à 9.3 °C. Le taux de saturation en oxygène est resté supérieur à 95%. Les autres conditions de stockage ont été estimées non limitantes. Dans ce contexte, la perte de poids individuelle mesurée sur 2 lots de 30 individus de chaque classe de poids est de 3.7% pour les plus petits et de 3.3% pour les plus gros poissons.
Tipo: Text
Palavras-chave: Dorades royales sauvages; Sparus aurata; Dévalaison; Vivier; Perte de poids au jeûne; Valorisation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00628/74039/73372.pdf

Effects of high food-demand fish removal in groups of juvenile sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Poi, C; Beauchaud, M; Bouchut, C; Dutto, Gilbert; Coves, Denis; Attia, J.
In self-feeding conditions, a few individual sea bass (Dicentrarchus labrax (L., 1758)) display strong activity in striking the food dispenser, whereas the remaining individuals of the group actuate the feeder weakly or never. Here, we investigated the effects of removal of the individuals showing dominant activity on the social and feeding behaviours in groups of juvenile sea bass. Following removal, new fish showing a dominant self-feeding activity quickly appear. They always come from the group of fish that have a low number of triggering actuations. This observation shows that it takes less time, about 5 days after the removal of dominant triggerers vs. 14 days at the beginning, for the re-establishment of the behavioural structure, suggesting the...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4766.pdf

Behavioral and neurophysiological responses of European sea bass (Dicentrarchus labrax) groups reared under food constraint
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di-poi, Carole; Attia, Joël; Bouchut, Colette; Dutto, Gilbert; Coves, Denis; Beauchaud, Marilyn.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00346/45753/45395.pdf

Muscle bioenergetics of two emblematic Mediterranean fish species: Sardina pilchardus and Sparus aurata
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Teulier, Loïc; Thoral, Elisa; Queiros, Quentin; Mckenzie, David; Roussel, Damien; Dutto, Gilbert; Gasset, Eric; Bourjea, Jerome; Saraux, Claire.
We investigated links between swimming behavior and muscle bioenergetics in two emblematic Mediterranean fish species that have very different ecologies and activity levels. European sardines Sardina pilchardus are pelagic, they swim aerobically, school constantly and have high muscle fat content. Gilthead seabream Sparus aurata are bentho-pelagic, they show discontinuous spontaneous swimming patterns and store less fat in their muscle. Estimating the proportion of red and white muscle phenotypes, sardine exhibited a larger proportion of red muscle (~10% of the body mass) compared to gilthead seabream (~5% of the body mass). We firstly studied red and white muscle fiber bioenergetics, using high-resolution respirometers, showing a 4-fold higher oxidation...
Tipo: Text
Palavras-chave: Red muscle; Bioenergetics; Marine fishes; Lipids.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61390/65054.pdf

Lenght-weight relationship adapted to freshwater prawn Macrobrachium rosenbergii morphological types
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mer, Gilles; Falguiere, Jean-claude; Lacroix, Denis; Gondouin, Philippe; Dutto, Gilbert.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00040/15169/12506.pdf

Effect of chronic ammonia exposure on growth of European seabass (Dicentrarchus labrax) juveniles
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemarie, Gilles; Dosdat, Antoine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Person, Jeannine.
Chronic effects of ammonia were studied in juvenile seabass, Dicentrarchus labrax (mean weight= 11 g), exposed for 63 days to eight stable ammonia concentrations, ranging from 0.24 to 0.90 mg l(-1) unionised ammonia nitrogen (UIA-N), respectively, from 6.1 to 22.3 mg l(-1) total ammonia nitrogen (TA-N). Temperature (21.8 degreesC), pH (8.0), salinity (37.0 ppt), and oxygen concentration (over 80% saturation at the outlet) were maintained constant. Fish were fed using a self-feeder device, and they were starved during the last 8 days. Mortality of 28.9 and 42.6% occur-red within the first 8 days at the two highest UIA-N concentrations, respectively, 0.90 and 0.88 mg l(-1). From days 0 to 55, a 1.8-fold increase in weight gain was observed under the 0.90-mg...
Tipo: Text
Palavras-chave: Plasma ammonia; Growth; Seabass; Chronic toxicity; Ammonia.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-628.pdf

Growth Performance and Adaptability of European Sea Bass (Dicentrarchus labrax) Gut Microbiota to Alternative Diets Free of Fish Products
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pérez-pascual, David; Estellé, Jordi; Dutto, Gilbert; Rodde, Charles; Bernardet, Jean-françois; Marchand, Yann; Duchaud, Eric; Przybyla, Cyrille; Ghigo, Jean-marc.
Innovative fish diets made of terrestrial plants supplemented with sustainable protein sources free of fish-derived proteins could contribute to reducing the environmental impact of the farmed fish industry. However, such alternative diets may influence fish gut microbial community, health, and, ultimately, growth performance. Here, we developed five fish feed formulas composed of terrestrial plant-based nutrients, in which fish-derived proteins were substituted with sustainable protein sources, including insect larvae, cyanobacteria, yeast, or recycled processed poultry protein. We then analyzed the growth performance of European sea bass (Dicentrarchus labrax L.) and the evolution of gut microbiota of fish fed the five formulations. We showed that...
Tipo: Text
Palavras-chave: European sea bass; Fish gut microbiota; Bacteria.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00646/75830/76816.pdf

Effect of chronic exposure to ammonia on alterations of proteins and immunoglobulins in sea bass (Dicentrarchus labrax) serum
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coeurdacier, Jean-luc; Dutto, Gilbert.
The relationship between serum protein, immunoglobulin concentrations and protein molecular weight profile (PMWP) alterations of sea bass (131.3 +/- 4.3 g) reared in sea water with sublethal concentrations of ammonia was studied over two periods totalling 116 days. During the exposure period (62 days) the first group (group 1) lived in sea water with 0.204 mg.L-1 unionized ammonia nitrogen equivalent to 12 % of the lethal concentration for 50 % of a population exposed for 96 h to ammonia (96-h LC50), whilst the second group (group 2) lived in sea water with 0.340 mg.L-1 UIA-N equivalent to 20 % of the 96-h LC50 of ammonia. Then, the two groups were left for a recovery period (54 days) in the same water as the control group (group 0). The determination of...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Fish culture; Proteins; Immunoglobulin; Sublethal toxicity; Ammonia; Dicentrarchus labrax; Poisson d'élevage; Protéine; Immunoglobuline; Toxicité sublétale; Ammoniaque.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-858.pdf

Influence of an environmental parameter in seabass (Dicentrarchus labrax L.) voluntary feed intake in intensive production system. General experimental designe illustrated by the example of water ammonia nitrogen level action
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00317/42853/42268.pdf

Nitrogenous and phosphorous waste production in a flow-through land-based farm of European seabass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lemarie, Gilles; Martin, Jean-louis; Dutto, Gilbert; Garidou, C.
A study on nitrogenous and phosphorous waste production in European seabass (Dicentrarchus labrax) was carried out in a flow-through land-based farm. The main objectives were (i) to calculate nitrogenous (N) and phosphorous (P) waste production (particulate and dissolved) from in situ measurements for different rearing ponds with specific fish biomasses, fish sizes and flow rates, (ii) to establish nitrogenous and phosphorous waste production budgets, ratios and equations, and (iii) to compare, for the whole farm, in situ measurements to estimate N and P waste production from waste equations. Waste production was manifest by an increase in concentrations of total ammonia nitrogen, total Kjeldhal nitrogen, particulate nitrogen, dissolved phosphorus and...
Tipo: Text
Palavras-chave: Fish farm waste; Excretion; Nitrogenous budget; Phosphorous budget; Dicentrarchus labrax.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-872.pdf

Amélioration des techniques d'élevage de la chevrette Macrobrachium rosenbergii en Guyane (programme pluri-annuel 1988-1990). 2ème volet : années 1989-1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Griessinger, Jean-michel; Gondouin, Philippe; Dutto, Gilbert; Lacroix, Denis; Pollet, Thierry; Falguiere, Jean-claude; Mer, Gilles.
Le programme d'amélioration des techniques d'élevage de la Chevrette Macrobrachium rosenbergii en Guyane constitue la deuxième phase du programme d'expérimentation mené sur la station IFREMER de Kourou. Jusqu'en 1988, l'effort a porté sur l'analyse du système continu classique utilisé par l'ensemble des producteurs de Macrobrachium aux Antilles et en Guyane. A partir de 1988, il apparut que la résolution des problèmes posés par son application passait par l'utilisation de schémas de gestion de la population en mode discontinu. Les expérimentations ont donc porté sur les principales conditions d'élevage susceptibles d'améliorer l'efficacité du schéma d'exploitation de la population. En prégrossissement, il s'agissait d'obtenir le meilleur compromis...
Tipo: Text
Palavras-chave: Elevage; Chevrette; Macrobrachium; Guyane; Zootechnie; Production.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00041/15262/12611.pdf

Dimorphisme de croissance et mise en évidence d'effets familiaux chez l'ombrine ocellée, Sciaenops ocellatus, en Martinique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rodriguez, Julien; Connan, Jean-paul; Dutto, Gilbert; Petton, Bruno; Falguiere, Jean-claude.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00020/13171/10229.pdf

Tagging juvenile seabass and sole with telemetry transmitters: medium-term effects on growth
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Begout, Marie-laure; Coves, Denis; Dutto, Gilbert; Laffargue, Pascal; Lagardere, Francoise.
The effects of tagging with acoustic transmitters on the growth of juvenile seabass, Dicentrarchus labrax (L.) (initial mean mass +/- SD, 173 g +/- 23.4) in a 47 d tank experiment, and sole. Solea solea (L.) ( 103.2 g +/- 14.8) in a 72 d tank experiment and (104.0 g +/- 18.4) in a 58 d salt marsh mesocosm experiment were examined. Twenty externally tagged seabass grew more slowly than the 20 with surgically implanted tags, which reached the same mass as nine control fish. Movements of the external transmitter's harness caused abrasions of the skin and loss of the tag in 60% of the cases. We thus recommend implanting transmitters for telemetry studies of juvenile seabass weighing between 120 and 214 g and carrying a tag that represents 2.2-2.5% of body...
Tipo: Text
Palavras-chave: Aquaculture; Telemetry; Marking techniques; Juvenile fish; Adaptation.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-386.pdf

Mécanisme d'apparition de la vessie natatoire chez les larves d'ombrine ocellée (Sciaenops ocellatus) et de platax (Platax orbicularis)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dutto, Gilbert; Gasset, Eric; Falguiere, Jean-claude; Bompas, Gregory; Connan, Jean-paul; Coves, Denis.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00020/13167/10225.pdf

Amélioration des techniques d'élevage de la chevrette Macrobrachium rosenbergii en Guyane
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Griessinger, Jean-michel; Gondouin, Philippe; Dutto, Gilbert; Lacroix, Denis; Pollet, Thierry; Falguiere, Jean-claude; Mer, Gilles.
En 1987, l'analyse du système d'élevage en continu menée par l' IFREMER tant sur les fermes guyanaises que sur la station expérimentale de Kourou a permis de mettre en évidence les limites et les faiblesses de ce mode d'élevage. Elle a montré la nécessité d'un meilleur contrôle du cheptel depuis l'ensemencement jusqu'à la commercialisation afin de pouvoir atteindre de manière fiable des rendements de l'ordre de 2,5 T/ha/an.
Tipo: Text
Palavras-chave: Elevage; Chevrette; Macrobrachium rosenbergii; Guyane; Zootechnie; Production; Grow-out; Freshwater prawn; Macrobrachium rseenbergii; French Guiana; Production.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00041/15266/12618.pdf

Long-term monitoring of individual fish triggering activity on a self-feeding system: An example using European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Beauchaud, M; Attia, J; Dutto, Gilbert; Bouchut, C; Begout, Marie-laure.
In two experiments, a computerized on-demand feeding system coupled with a PIT tag monitoring device was used to continuously record the triggering activity by ca. 50 individual sea bass for 55 days (Exp. 1, initial average body weight and coefficient of variation, CV: 299 g, 15%) and 69 days (Exp. 2, 157 g, 13%). Each group was stocked in 1 m(3) tanks and exposed to a water temperature of 21 +/- 1 degrees C and a light regime of 16:8 LD. Only 5% of the triggering activity was not associated with simultaneous PIT tag detection. Although each individual was detected via PIT tag during the experiment, only 67% and 74% of the fish actuated the trigger at least once in Exp. 1 and Exp. 2, respectively. Moreover, only two fish in Exp. 1 and one fish in Exp. 2...
Tipo: Text
Palavras-chave: PIT tag detection antenna; Individual triggering activity; Self feeding; Sea bass.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1341.pdf

A simple way of avoiding feed wastage in European seabass, Dicentrarchus labrax, under self-feeding conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Self-feeding systems allow fish to freely express feeding activity. A simple rod at the water surface can act as a trigger and provide fish with a way of obtaining pellets from a feeder. Such a rod presented to experienced European seabass, Dicentrarchus labrax, may lead to feed wastage, probably as a result of unintentional fish contacts with the trigger. Trigger protection screens have been designed to prevent fish contacting the trigger by chance, and the efficacy of such screens was tested. Nocturnal and diurnal feed delivery and feed wasted were compared under conditions where the rod was unprotected or protected by semi-cylindrical or cylindrical screens. Tests were conducted using an unrestricted self-feeding regime (reward: 0.2 g pellet per kg of...
Tipo: Text
Palavras-chave: Feeding behaviour; Feed wastage; Self feeding; Fish culture; Comportement alimentaire; Gaspillage d'aliment; Auto alimentation; Élevage de poissons.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-867.pdf

Gamete quality and management for in vitro fertilisation in meagre (Argyrosomus regius)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ramos-júdez, Sandra; González, Wendy; Dutto, Gilbert; Mylonas, Constantinos C.; Fauvel, Christian; Duncan, Neil.
The aquaculture of meagre (Argyrosomus regius) requires methods for the control of reproduction that enable the production of families from specific individuals for selective breeding programs. We experimentally determined the parameters required for an in vitro fertilisation protocol. A total of 14 females and 5 males (mean ± S.D. weights of 20.45 ± 6.22 and 15.94 ± 2.75 kg, respectively) were used. Selected females had vitellogenic oocytes &gt;550 μm in diameter and males had fluid sperm upon application of abdominal pressure. Both sexes were treated with an injection of 15 μg kg−1 of gonadotropin-releasing hormone agonist (GnRHa) to induce oocyte maturation/ovulation and enhance sperm production. To determine the timing of ovulation and window of high...
Tipo: Text
Palavras-chave: Argyrosomus regius; Meagre; Reproduction; Artificial fertilisation; Gamete management; GnRHa.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00495/60682/64178.pdf

Transcriptomic Profiling of Egg Quality in Sea Bass (Dicentrarchus labrax) Sheds Light on Genes Involved in Ubiquitination and Translation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Zarski, Daniel; Thaovi Nguyen,; Le Cam, Aurelie; Montfort, Jerome; Dutto, Gilbert; Vidal, Marie-odile; Fauvel, Christian; Bobe, Julien.
Variable and low egg quality is a major limiting factor for the development of efficient aquaculture production. This stems from limited knowledge on the mechanisms underlying egg quality in cultured fish. Molecular analyses, such as transcriptomic studies, are valuable tools to identify the most important processes modulating egg quality. However, very few studies have been devoted to this aspect so far. Within this study, the microarray-based transcriptomic analysis of eggs (of different quality) of sea bass (Dicentrarchus labrax) was performed. An Agilent oligo microarray experiment was performed on labelled mRNA extracted from 16 batches of eggs (each batch obtained from a different female) of sea bass, in which over 24,000 published probe arrays were...
Tipo: Text
Palavras-chave: Microarray; Genomics; Transcriptomics; Aquaculture; Controlled reproduction.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00371/48220/48345.pdf

Regulation of feed intake, growth, nutrient and energy utilisation in European sea bass (Dicentrarchus labrax) fed high fat diets
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boujard, Thierry; Gelineau, Anne; Coves, Denis; Corraze, Genevieve; Dutto, Gilbert; Gasset, Eric; Kaushik, Sadasivam.
Three practical isoproteic (54% protein) diets were formulated to contain graded levels of crude fat (diet L: 10%, diet M: 20% and diet H: 30%). Each diet was assigned unrestrictedly to three and restrictedly to two replicate groups of fish (IBW 243 g). In unrestricted groups, increasing the dietary lipid level led to a significant decrease in voluntary feed intake without affecting growth rate. In the feed-restricted groups, daily growth rates increased with increasing dietary fat levels. There was a significant and inverse effect of the dietary fat content on whole body moisture and fat levels, with highest lipid (ca. 20%) and lowest moisture (ca. 58%) contents in sea bass fed diet containing the highest lipid level; muscle lipid concentration was...
Tipo: Text
Palavras-chave: Phosphorus excretion; Feed intake; Lipid; Digestible energy; European sea bass; Dicentrarchus labrax.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-392.pdf

Effects of rearing density on sea bass (Dicentrarchus labrax) biological performance, blood parameters and disease resistance in a flow through system
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Roque D'Orbcastel, Emmanuelle; Lemarie, Gilles; Breuil, Gilles; Petochi, Tommaso; Marino, Giovanna; Triplet, Sebastien; Dutto, Gilbert; Fivelstad, Sveinung; Coeurdacier, Jean-luc; Blancheton, Jean-paul.
During 84 days, the effects of density on juvenile sea bass (Dicentrarchus labrax) (76 +/- 16 g) were studied in an experimental tank-based flow through system. Performance, stress response and resistance to virus infection were analysed under five stabilized rearing densities: 10, 20, 40, 70 and 100 kg m(-3). Water quality parameters (CO2, total ammonia nitrogen and O-2) were measured and maintained close to the recommended values for farmed sea bass by adjusting water renewal exchange. No significant differences were observed between density treatments, neither on stress response (cortisol) nor susceptibility to nodavirus. With regards to biological performances, the daily feed intake and specific growth rate were significantly lower in fish reared at...
Tipo: Text
Palavras-chave: Rearing density; Flow through system; Stress; Water quality; Sea bass.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11287/7824.pdf

Effet du ratio lipides/protéines de l'aliment sur la croissance de l'ombrine ocellée (Sciaenops ocellatus) et sur les rejets biologiques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faure, Leslie; Regina, Françoise; Dutto, Gilbert; Falguiere, Jean-claude; Coves, Denis; Cahu, Chantal.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20947/18566.pdf

Behavioral and neurophysiological responses of European sea bass groups reared under food constraint
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Poi, Carole; Attia, J; Bouchut, C; Dutto, Gilbert; Coves, Denis; Beauchaud, M.
The individual food-demand behavior of juvenile European sea bass (Dicentrarchus labrax, L.) reared in groups under self-feeding conditions was investigated. The triggering activity on self-feeder, i.e. index of the food-demand activity, agonistic interactions and territorial behavior were monitored for periods of 42 to 68 days in six groups of 50 fish. The specific growth rate was calculated and the brain serotonergic activity was used as a stable index of social stress. Inter-individual differences appeared in triggering activity and three groups were distinguished: 3-5 high-triggering fish, 17-30 low-triggering fish and the remaining individuals were null-triggering fish. There were no significant differences in specific growth rates calculated at the...
Tipo: Text
Palavras-chave: Social stress; Brain serotonergic activity; Territorial behavior; Agonistic interactions; Self feeding; European sea bass; Triggering activity; Food demand behavior.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2637.pdf

Is total serum protein a good indicator for welfare in reared sea bass (Dicentrarchus labrax)?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Coeurdacier, Jean-luc; Dutto, Gilbert; Gasset, Eric; Blancheton, Jean-paul.
Reared sea bass were submitted to six stressful situations: hyperoxia with or without hypercapnia, increased stocking density in an open flow or recirculating system, transfer to another tank and nodavirus injection. The potentially negative impact of these factors on the lives of sea bass was investigated by measuring 9 water parameters and 19 fish parameters including total serum protein (TSP). TSP has already been used to evaluate stress. The present study investigates data of previous and new experiments, concentrating on the potential use of TSP as a routine indicator to assess welfare in sea bass reared on fish farms. In the current experiment, oxygen and carbon dioxide were seen to affect levels of TSP, but alterations were too erratic to enable...
Tipo: Text
Palavras-chave: Fish stress; Fish welfare; Protein; Serum; Fish transfer; Nodavirus; Sea bass.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15382/12740.pdf

"Social knockout effect" on group feeding dynamic in juvenile sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di-poi, Carole; Attia, Joël; Bouchut, Colette; Dutto, Gilbert; Coves, Denis; Beauchaud, Marilyn.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00346/45752/45394.pdf

Food in the Sea: Size Also Matters for Pelagic Fish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Queiros, Quentin; Fromentin, Jean-marc; Gasset, Eric; Dutto, Gilbert; Huiban, Camille; Metral, Luisa; Leclerc, Lina; Schull, Quentin; Mckenzie, David; Saraux, Claire.
Small pelagic fish are key components of marine ecosystems and fisheries worldwide. Despite the absence of recruitment failure and overfishing, pelagic fisheries have been in crisis for a decade in the Western Mediterranean Sea because of a marked decline in sardine size and condition. This situation most probably results from bottom-up control and changes in the plankton community toward smaller plankton. To understand such an unusual phenomenon, we developed an original and innovative experimental approach investigating the mechanisms induced by a reduction in the quantity and size of sardine prey. While experimentations offer the unique opportunity to integrate behavior and ecophysiology in understanding key demographic processes, they remain rarely...
Tipo: Text
Palavras-chave: Experimentation; Small pelagics; Sardina pilchardus; Body condition; Bottom-up control.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61669/65585.pdf

Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dosdat, Antoine; Person, Jeannine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Le Roux, Annick; Lemarie, Gilles.
The chronic effects of exposing sea bass (average initial weight 100 g) to ammonia in water at 22 degreesC 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 1(-1) NH3-N (0.53-16.11 mg 1(-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...
Tipo: Text
Palavras-chave: Sea bass; Self feeding; Compensatory growth; Chronic toxicity; Ammonia.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-595.pdf

« Qui va à la chasse perd sa place ! » Hiérarchie et groupe social chez le loup de Méditerranée
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Di Poi, Carole; Attia, Joel; Beauchaud, Marilyn; Bouchut, Colette; Coves, Denis; Dutto, Gilbert; Mathevon, Nicolas.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00162/27284/25500.pdf

Small pelagic fish dynamics: a review of mechanisms in the Gulf of Lions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Saraux, Claire; Van Beveren, Elisabeth; Brosset, Pablo; Queiros, Quentin; Bourdeix, Jean-herve; Dutto, Gilbert; Gasset, Eric; Jac, Cyrielle; Bonhommeau, Sylvain; Fromentin, Jean-marc.
Around 2008, an ecosystem shift occurred in the Gulf of Lions, highlighted by considerable changes in biomass and fish mean weight of its two main small pelagic fish stocks (European anchovy, Engraulis encrasicolus; European sardine, Sardina pilchardus). Surprisingly these changes did not appear to be mediated by a decrease in fish recruitment rates (which remained high) or by a high fishing pressure (exploitation rates being extremely low). Here, we review the current knowledge on the population's dynamics and its potential causes. We used an integrative ecosystem approach exploring alternative hypotheses, ranging from bottom-up to top-down control, not forgetting epizootic diseases. First, the study of multiple population characteristics highlighted a...
Tipo: Text
Palavras-chave: Population dynamics; Top-down; Disease; Zooplankton; Exploited species; Bottom-up.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00427/53861/54903.pdf

No efficiency of the lateral system on nocturnal feeding in the European sea bass (Dicentrarchus labrax L.)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faucher, Karine; Dutto, Gilbert; Coves, Denis; Aubert, Anne; Lagardere, Jean-paul.
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...
Tipo: Text
Palavras-chave: Feed efficiency; Growth; Nocturnal feeding; Photoperiod; Lateral system; European sea bass.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2267.pdf