Consulta: creatorFacets:"Regost, Christelle"
Registros recuperados: 8
Data/hora: 27/07/2024 02:15:35

Dietary lipid level, hepatic lipogenesis and flesh quality in turbot (Psetta maxima)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Cardinal, Mireille; Robin, Jean; Laroche, M; Kaushik, Sadasivam.
A study was undertaken with marketable size turbot to evaluate the effects of dietary fat levels on chemical composition. lipogenesis and flesh quality, Four experimental diets containing graded levels of fish oil in order to obtain 10%, 15%, 20% and 25% of crude fat were fed to triplicate groups of turbot (initial body weight of 660 g) for 12 weeks in full strength seawater at temperature of 17 degreesC. Nutrient digestibility was not influenced by dietary fat levels. The best growth performance was observed in fish fed 10% and 15% dietary fat. High dietary lipid levels led to higher fat deposition in whole fish, although lipid level in muscle remained low (1.1% in dorsal muscle and 1.7% in ventral muscle irrespective of diet), Significant subcutaneous...
Tipo: Text
Palavras-chave: Flesh quality; Lipogenesis; Fat deposition; Dietary lipids; Psetta maxima.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-376.pdf

Effect of dietary lipid sources on odour-active compounds in muscle of turbot (Psetta maxima)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serot, Thierry; Regost, Christelle; Prost, Carole; Robin, Jean; Arzel, Jacqueline.
Odour-active compounds in muscle of turbot (Psetta maxima) fed experimental diets containing fish oil (FO), soybean oil (SO) or linseed oil (LO) were investigated by a gas chromatography/olfactometry technique. Thirty-one areas associated with odours were detected in muscle extracts. Among the compounds responsible for these odours, 23 were formed by oxidation of unsaturated fatty acids. Independently of diet, (E)-2-penten-1-ol and (E)-3-hexen-1-ol contribute strongly to the odour of turbot. (E,Z)-2,6-Nonadienal, (E)-2-pentenal and (E,E)-1,3-(Z)-5-octatriene seem to contribute strongly to the odour of turbot fed diets containing high levels of n-3 PUFA (FO and LO groups). Hexanal and decanal show a high detection frequency in turbot fed diets containing...
Tipo: Text
Palavras-chave: Vegetable oils; Turbot; Olfactometry; Odour active compounds.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-683.pdf

Effets des lipides sur la qualité nutritionnelle, physique et organoleptique de la chair de la truite fario (Salmo trutta) et du turbot (Psetta maxima)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle.
In order to improve reared fish quality, the aim of this study was to evaluate the effects of dietary lipids on lipid utilisation, physical and organoleptic flesh quality in brown trout (Salmo trutta) and turbot (Psetta maxima). Increasing dietary lipid levels did not affect the growth of brown trout contrary to turbot and led to higher fat deposition particularly in brown trout. In brown trout, lipid accumulation occurred preferentially in viscera and in muscle while in turbot lipid deposition was mainly observed in liver and carcass. Lipogenic regulation was observed only in brown trout. Changes in dietary lipid levels induced a few difference in organoleptic tests in both species. A strong positive relationship between instrumental colour analyses and...
Tipo: Text
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00034/14565/11868.pdf

Fat deposition and flesh quality in seawater reared, triploid brown trout (Salmo trutta) as affected by dietary fat levels and starvation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Cardinal, Mireille; Laroche, M; Kaushik, Sadasivam.
Three isoproteic (crude protein content: 56%) diets with different fat levels (11%, 20%, and 26%) were fed to triplicate groups of triploid brown trout (initial average body weight of 1.5 kg), reared in seawater. At the end of 3 months of feeding, fish fed the high-fat (HF) diet were split into two groups: a triplicate group of fish received the low-fat diet and another triplicate group was kept unfed for a further 2-month period. Fish initially fed the low-fat diet during the first period were continued to be fed the same diet. Fish fed the medium-fat (MF) diet during period 1 were eliminated for period 2. At the end of each period, comparative whole body analyses, sensory and instrumental (texture and colour) analyses were made on fresh and smoked...
Tipo: Text
Palavras-chave: Texture; Colour; Sensory analyses; Starvation fat deposition; Dietary fat; Salmo trutta.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-377.pdf

Fatty acid profile of fish following a change in dietary fatty acid source: model of fatty acid composition with a dilution hypothesis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Robin, Jean; Regost, Christelle; Arzel, Jacqueline; Kaushik, Sadasivam.
The fatty acid (FA) content of fish is generally said to reflect fatty acid composition of the diet. In fact, incorporation of FA into tissues is modulated by various metabolic factors, and final composition will depend upon the initial FA content, cumulative intake of dietary fatty acids, growth rate and duration. Analysis of time course of changes in FA composition should be easier with animals having different initial FA profiles, which are subsequently fed a diet with the same FA composition.   Data from two studies, one with brown trout and another with turbot were used. Fish were first fed with diets containing one of three different oils (soybean oil (SO), linseed oil (LO) and fish oil (FO)), and subsequently fed the same fish oil-based diet...
Tipo: Text
Palavras-chave: Dietary change; Model; Fish; Fatty acids.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-498.pdf

Identification of odour-active compounds in muscle of brown trout (Salmo trutta) as affected by dietary lipid sources
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Serot, Thierry; Regost, Christelle; Arzel, Jacqueline.
The effect of fatty acid composition on odour-active compounds in brown trout (Salmo trutta) muscle was evaluated. The fillets were obtained from three groups of fish fed experimental diets containing either fish oil (170), soybean oil (SO) or linseed oil (LO). Muscle fatty acid composition was shown to be influenced by diet. Thirty-one odorous compounds were detected by gas chromatography/olfactometry (frequency-of-detection method). Most of these compounds were formed by the oxidation of unsaturated fatty acids. Independently of diet, (E)-2-pentenal, (E)-2-pentenol and (E)-2-hexenol contribute strongly to the odour of brown trout. (E,Z)-2,4-Heptadienal was detected with high frequency in fish fed diets containing high levels of n-3 PUFAs (FO and LO...
Tipo: Text
Palavras-chave: Vegetable oils; Olfactometry; Odour active compounds; Brown trout.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-722.pdf

Total replacement of fish oil by soybean or linseed oil with a return to fish oil in turbot (Psetta maxima) - 1. Growth performance, flesh fatty acid profile, and lipid metabolism
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Robin, Jean; Rosenlund, Grethe; Kaushik, Sadasivam.
The aim of the study was to investigate the replacement of fish oil by vegetable oils and the effects of a washout with a return to fish oil on growth performances and lipid metabolism. three experimental fish meal-based isonitrogenous (crude protein content: 57.5%) and isolipidic (crude lipid content: 16.5%) diets were formulated containing either 9% of added fish oil (170), soybean oil (SO), or linseed oil (LO). Each diet was distributed to triplicate groups of 25 marketable size turbot (initial body weight of 579 g) grown in seawater at water temperature of 17 T. Fish were fed once a day to visual satiety. At the end of the growth trial, which lasted 13 weeks, all groups of turbot were fed with FO diet for 8 weeks. The growth of turbot was high, but the...
Tipo: Text
Palavras-chave: Lipogenesis; Fatty acids; Liver; Muscle; Body composition; Growth; Vegetable oil; Fish oil; Psetta maxima.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-375.pdf

Total replacement of fish oil by soybean or linseed oil with a return to fish oil in Turbot (Psetta maxima) 2. Flesh quality properties
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Regost, Christelle; Arzel, Jacqueline; Cardinal, Mireille; Rosenlund, Grethe; Kaushik, Sadasivam.
The aim of this study was to evaluate (1) the effects of replacement of fish oil by vegetable oils on flesh quality and (2) the effects of a washout with a return to fish oil on flesh quality of turbot. In a first period of 3 months, three isonitrogenous and isolipidic diets containing 9% of added marine fish oil (170), soybean oil (SO) or linseed oil (LO) were fed to triplicate groups of 25 marketable size turbot (initial body weight: 579 +/- 1 g) grown in sea water at the temperature of 17 degreesC. At the end of the first period, all groups of turbot were fed with the diet containing fish oil (diet FO) for a further period of 2 months. The gutted and fillet yields were not affected by the incorporation of vegetable oils. However, soybean or linseed oils...
Tipo: Text
Palavras-chave: Sensory analyses; Texture; Washout period; Vegetable oils; Psetta maxima.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-385.pdf