Consulta: creatorFacets:"Grima, Laure"
Registros recuperados: 5
Data/hora: 10/06/2024 19:04:33

Genetic variability in residual feed intake in rainbow trout clones and testing of indirect selection criteria
Provedor de dados: 5
Autores: Grima, Laure; Quillet, E; Boujard, Thierry; Robert Granie, C; Chatain, Beatrice; Mambrini, M.
Little is known about the genetic basis of residual feed intake (RFI) variation in fish, since this trait is highly sensitive to environmental influences, and feed intake of individuals is difficult to measure accurately. The purpose of this work was (i) to assess the genetic variability of RFI estimated by an X-ray technique and (ii) to develop predictive criteria for RFI. Two predictive criteria were tested: loss of body weight during feed deprivation and compensatory growth during re-feeding. Ten heterozygous rainbow trout clones were used. Individual intake and body weight were measured three times at three-week intervals. Then, individual body weight was recorded after two cycles of a three-week feed deprivation followed by a three-week re-feeding....
Tipo: Text
Palavras-chave: Selection; Indirect criteria; Residual feed intake; Clone; Rainbow trout.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4777.pdf

In search for indirect criteria to improve residual feed intake in sea bass (Dicentrarchus labrax) Part I: Phenotypic relationship between residual feed intake and body weight variations during feed deprivation and re-feeding periods
Provedor de dados: 5
Autores: Grima, Laure; Vandeputte, Marc; Ruelle, Francois; Vergnet, Alain; Mambrini, Muriel; Chatain, Beatrice.
No commercial breeding programs have yet started to improve feed utilization efficiency in fish, mainly because of the difficulty in accurately measuring individual feed intake in fish reared in groups. Our general goal is to propose indirect criteria to be used for breeding of commercial lines. In a previous study undertaken with rainbow trout clones, a genetic correlation was detected between residual feed intake (RFI), and body weight variation during successive periods of feed deprivation (FD) and re-feeding (RF). To assess the pertinence of such indirect criteria for future breeding programs, we set up a large experiment using sea bass (Dicentrachus labrax), a recently domesticated species with broad genetic diversity. The objectives of the present...
Tipo: Text
Palavras-chave: European sea bass; Dicentrachus labrax; Feed efficiency; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11297/7838.pdf

In search for indirect criteria to improve feed utilization efficiency in sea bass (Dicentrarchus labrax) Part II: Heritability of weight loss during feed deprivation and weight gain during re-feeding periods
Provedor de dados: 5
Autores: Grima, Laure; Chatain, Beatrice; Ruelle, Francois; Vergnet, Alain; Launay, Amandine; Mambrini, Muriel; Vandeputte, Marc.
Selective breeding to improve residual feed intake (RFI) in sea bass (Dicentrarchus labrax) is a major goal that would optimize economic gain while minimizing the environmental impact of production. Due to the difficulty in accurately measuring individual feed intake, no selective breeding program has yet been started. In a previous study, we identified a criterion phenotypically related to RFI variations: the loss of weight during feed deprivation, FD. Moreover, an additional composite criterion (CC) integrating both FD and weight gain during subsequent re-feeding (RF) was closely related to RFI, even though the relationship was only close to significance (P=0.06). The aim of the present study was to estimate the heritability of these two traits, in order...
Tipo: Text
Palavras-chave: European sea bass; Dicentrarchus labrax; Feed efficiency; Heritability; Genetic parameters; Residual feed intake; Feed deprivation; Compensatory growth; Selective breeding.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00004/11529/8213.pdf

Vers une amélioration de l'efficacité alimentaire chez le poisson : nouveaux critères et voie de sélection
Provedor de dados: 5
Autores: Grima, Laure.
Improving feed use efficiency (FE) is one of the major steps needed for the development of sustainable fish farming. However, to date, no selection program has started. This can be explained by the difficulty to measure individual FE in fishes reared in groups. The use of indirect, easy to measure criteria linked with FE would be highly valuable in order to start a breeding program. The aim of the present work is to set the foundations of a future strategy for improving fish FE based on such indirect criteria. The resistance to feed deprivation (FD) et the compensatory growth (CG) were selected as potential indirect criteria. Indeed, these traits supposedly reflect the maintenance requirements et metabolism rate of individuals. The originality of the...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00024/13550/10590.pdf

Effect of selection for fasting tolerance on feed intake, growth and feed efficiency in the European sea bass Dicentrarchus labrax
Provedor de dados: 5
Autores: Daule, Sophie; Vandeputte, Marc; Vergnet, Alain; Guinand, Bruno; Grima, Laure; Chatain, Beatrice.
Feed efficiency is a major goal for aquaculture sustainability, and selecting fish to genetically enhance this trait would be highly valuable. However, no selective breeding program specifically targeted to feed efficiency exists for farmed fish, mostly because of the difficulty of measuring individual feed intake. However, a negative phenotypic correlation between feed efficiency and weight loss at fasting has been previously demonstrated in sea bass submitted to feed deprivation (FD). We mated sea bass parents selected for their high (FD+) or low (FD-) weight loss at fasting to produce FD+ and FD- progeny, which were reared in a single tank to avoid common environmental effects. At 8 months of age, 1200 of those fish were submitted to three alternating...
Tipo: Text
Palavras-chave: European sea bass; Dicentrarchus labrax; Selective breeding; Feed efficiency; Fasting tolerance.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/29985/28483.pdf