Consulta: subjectFacets:"Gut maturation"
Registros recuperados: 7
Data/hora: 10/06/2024 04:34:54

The effects of dietary marine protein hydrolysates on the development of sea bass larvae, Dicentrarchus labrax, and associated microbiota
Provedor de dados: 5
Autores: Delcroix, Jeremy; Gatesoupe, F.j.; Desbruyeres, Elisabeth; Huelvan, Christine; Le Delliou, Herve; Le Gall, Marie-madeleine; Quazuguel, Patrick; Mazurais, David; Zambonino-infante, Jose-luis.
Protein hydrolysate is an essential component of dry starter diets for fish larvae, as promoting healthy development. Peptides are also suitable substrates for many intestinal microbes. Five experimental diets were compared to a control diet (CONT) supplemented with a commercial fish protein hydrolysate. Each diet contained one marine protein hydrolysate, which differed by the proportion of di- and tri-peptides, and by raw materials. Two diets (HYD4 and HYD5) stimulated larval growth compared with CONT. Two other diets (HYD1 and HYD2) yielded inferior growth. HYD1 was detrimental for survival, which was associated with an up-regulation of genes involved in inflammation and antioxidative responses, while the gene coding for osteocalcin was down-regulated in...
Tipo: Text
Palavras-chave: Compound diets; Denaturing gradient gel electrophoresis; Digestive enzymes; Gene expression; Gut maturation; Peptides.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00197/30865/29268.pdf

Substitution of live food by formulated diets in marine fish larvae
Provedor de dados: 5
Autores: Cahu, Chantal; Zambonino, Jose-luis.
Until recently, it was considered impossible to feed newly hatched marine fish species with a compound diet. Substituting a compound diet for live prey was performed several weeks after hatching, depending on the species. Compound diets were well ingested at the early stage but larvae died with a gut full of food, suggesting that larvae were unable to digest the compound diet. The hypothesis was that younger larvae have insufficient digestive enzymes to thrive on compound diets, and that exogenous enzymes, provided from live prey, are necessary for early stages.The organogenesis of marine fish larvae is not completely achieved at hatching and histological studies have revealed that the anatomy of the digestive tract undergoes developmental changes over...
Tipo: Text
Palavras-chave: Protein; Phospholipid; Pancreatic enzymes; Microparticulate diet; Intestinal enzymes; Protein hydrolysate; Gut maturation; Fish larvae.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-447.pdf

Phospholipids vs. neutral lipids: Effects on digestive enzymes in Atlantic cod (Gadus morhua) larvae
Provedor de dados: 5
Autores: Wold, P; Hoehne Reitan, K; Cahu, Chantal; Zambonino, Jose-luis; Rainuzzo, J; Kjorsvik, E.
The aim of this study was to evaluate the effect of dietary lipid classes (phospholipid vs. neutral lipid) and level of n-3 highly unsaturated fatty acids (HUFAs) on growth, survival and digestive enzymatic activity in Atlantic cod (Gadus morhua) larvae. Larvae were fed enriched rotifers from mouth opening and were weaned to formulated diets during a co-feeding period lasting from 17 days post hatch (dph) to 24 dph. Larvae were fed exclusively compound diets from 24 dph until the end of the experiment. Three isoproteic and isolipidic compound diets with gradually decreasing levels of DHA and EPA in the dietary phospholipid fraction (diet PL3 &gt;PL1 &gt;NL1) and increasing levels of total dietary neutral lipids (PL3 &lt;PL1 &lt;NL1) were used. Larvae fed...
Tipo: Text
Palavras-chave: Gut maturation; Digestive enzymes; Phospholipids; Early weaning; Atlantic cod larvae.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3801.pdf

Influence of dietary live yeast on European sea bass (Dicentrarchus labrax) larval development
Provedor de dados: 5
Autores: Tovar Ramirez, Dariel; Zambonino-infante, Jose-luis; Cahu, Chantal; Gatesoupe, Joel; Vazquez Juarez, R.
Recent results have demonstrated that live yeast in diets improved gut maturation in sea bass larvae. In this study, we tested the absence and two levels of live yeast in sea bass larvae diets. Specimens were fed from time of mouth opening to 37 days after hatching a diet of 0%, 1.1%, or 5.7% wet weight of live yeast (Debaryomyces hansenii CBS 8339). Yeast incorporation improved survival 10%, and reduced malformed larvae. In groups fed 1.1% yeast, only 1% of larvae were malformed, compared to 14% in the control group. Final mean weight in groups fed 1.1% yeast was twice that of other groups. Activities and concentrations of mRNA trypsin and lipase were higher in the two groups fed yeast than in the control group, whereas activity and concentration of mRNA...
Tipo: Text
Palavras-chave: Polyamines; Lipase; Trypsin; Amylase; Enzymes; Gut maturation; Fish larvae.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-831.pdf

Effect of lipid level in a compound diet on the development of red drum (Sciaenops ocellatus) larvae
Provedor de dados: 5
Autores: Buchet, Vincent; Zambonino, Jose-luis; Cahu, Chantal.
Red drum larvae were fed from day 11 to day 24 post-hatch, with Artemia (LP group) or two isoproteinic-formulated diets with varying lipid levels, 15% (L15 group) and 30% (L30 group). The lipid fraction was composed of a mixture of cod liver oil and soy lecithin. Larvae fed Artemia exhibited the greatest length, L30 diet induced a larvae length significantly greater than that obtained with L15 diet (P &lt; 0,05). No difference was observed in larvae survival among the three dietary groups. The increase in dietary lipid concentration led to an increase in amylase and trypsin secretion levels in 24-day-old larvae. The pancreatic secretion level measured in L30 group was close to that of LP group, suggesting that the maturation of the pancreatic functions was...
Tipo: Text
Palavras-chave: Gut maturation; Digestive enzymes; Compound diet; Lipid; Larvae; Red drum.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-503.pdf

Live yeasts in the gut: Natural occurrence, dietary introduction, and their effects on fish health and development
Provedor de dados: 5
Autores: Gatesoupe, Joel.
This minireview summarizes the present state of knowledge concerning the importance of yeasts in fish gut. Yeasts have been commonly isolated in the gastrointestinal tract, and high population densities were sometimes noted in healthy fish, but the data were quite variable in terms of colony counts and taxonomical diversity. Rhodotorula sp. seemed relatively frequent in both marine and freshwater fish, and Debaryomyces hansenii has been found to be dominant in rainbow trout. Some other dominant strains have been described, such as Metschnikowia zobelii, Trichosporon cutaneum, and Candida tropicalis in marine fish, and Candida sp., Saccharomyces cerevisiae, and Leucosporidium sp. in rainbow trout. The natural proliferation of yeasts in fish mucus may be...
Tipo: Text
Palavras-chave: Immune system; Growth promotion; Gut maturation; Gastrointestinal microbiota; Probiotics; Yeast.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2144.pdf

Cross effects of the strain of dietary Saccharomyces cerevisiae and rearing conditions on the onset of intestinal microbiota and digestive enzymes in rainbow trout, Onchorhynchus mykiss, fry
Provedor de dados: 5
Autores: Wache, Yann; Auffray, Francoise; Gatesoupe, Joel; Zambonino, Jose-luis; Gayet, Vincent; Labbe, Laurent; Quentel, C.
Two strains of Saccharomyces cerevisiae were tested as probiotics for rainbow trout fry, during the first month of feeding. Each strain was introduced into separate diets, at the rate of 106 CFU g&amp;#8722; 1 and their effects were compared with those of a control diet. Two rearing conditions were simultaneously compared, to test the adaptability of the probiotic treatment. From start feeding onwards, the water supply came from either spring or river, resulting in two different temperature ranges, 11¿11.5 and 7¿8 °C respectively. Growth and development were optimal in spring water, while some delay was observed with colder river water. A slight but significant increase in mortality was also observed in the river group. In all groups, the counts of...
Tipo: Text
Palavras-chave: Debaryomyces hansenii; Yeast; Brush border membrane; Gut maturation; Larval development; Start feeding.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1816.pdf