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| Registros recuperados: 85 | |
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| Desvignes, Thomas; Nguyen, Thaovi; Chesnel, Franck; Bouleau, Aurelien; Fauvel, Christian; Bobe, Julien. |
| Retinitis pigmentosa 2 (RP2) gene is responsible for up to 20% of X-linked retinitis pigmentosa, a severe heterogeneous genetic disorder resulting in progressive retinal degeneration in humans. In vertebrates, several bodies of evidence have clearly established the role of Rp2 protein in cilia genesis and/or function. Unexpectedly, some observations in zebrafish have suggested the oocyte-predominant expression of the rp2 gene, a typical feature of maternal-effect genes. In the present study, we investigate the maternal inheritance of rp2 gene products in zebrafish eggs in order to address whether rp2 could be a novel maternal-effect gene required for normal development. Although both rp2 mRNA and corresponding protein are expressed during oogenesis, rp2... |
| Tipo: Text |
Palavras-chave: Developmental biology; Egg developmental competence; Egg quality; Fish; Fish reproduction; Maternal-effect gene; Ndpk; Nme10; Oocyte; Oocyte-specific; Ovum; Teleost; Zygote. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00280/39099/37660.pdf |
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| Bardon-albaret, Agnes; Saillant, Eric. |
| The effects of hypoxic conditions and elevated ammonia concentrations on the viability of embryos and newly hatched larvae of the red snapper (Lutjanus campechanus) were investigated. In all experiments, tested levels of hypoxia or ammonia concentrations were applied to embryos and unfed newly hatched larvae from three different spawns. Exposures began at 1 h post fertilization (pf) and lasted until all individuals in a group had expired. Survival rates were monitored daily in duplicates for each spawn in each treatment. Fertilized eggs exposed to 2 mg L− 1 dissolved oxygen (29% saturation) showed complete mortality before hatch while 81% of embryos in control groups (> 85% saturation) hatched and subsequently maintained high survival until 5 days pf.... |
| Tipo: Text |
Palavras-chave: Lutjanus campechanus; Hypoxia; Ammonia; Egg quality; Stress; Water quality. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00321/43188/42735.pdf |
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| Suquet, Marc; Normant, Yvon; Gaignon, Jean-louis; Quemener, Loic; Fauvel, Christian. |
| The effects of water temperature on pollack (Pollachius pollachius) spawning features were individually assessed. During the spawning period, nine fish sets, each composed of one female and two males (mean body weight: 2.5+/-1.0 kg), were placed in small-volume tanks (2 m(3)). Fish sets were held at 8, 10, or 12 degreesC (n=3 for each temperature). Three females released eggs at 8 and 10 degreesC, while only two spawned at 12 degreesC. One hundred thirty-one individual spawns were collected from the eight spawning fish sets. The number of spawns collected per female was significantly lower at 12 degreesC (3.0+/-3.6), compared to 10 degreesC (17.3+/-10.1) and 8 degreesC (23.3+/-2.5). Egg number (eggs kg(-1) BW) was significantly lowered at 12 degreesC... |
| Tipo: Text |
Palavras-chave: Egg quality; Temperature; Reproduction; Pollachius pollachius; Pollack; Gadoids. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-470.pdf |
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| Cahu, Chantal. |
| This report is presented by Chantal Cahu for obtaining accreditation to supervise research. Since 1981, her research activity has addressed the study of reproducers' nutrition and the young stages of development of marine organisms belonging to two different branch lines, crustaceans and fish. This work, performed in a base-lined research body, IFREMER, is placed within a more general programme of aquaculture development. Indeed, whatever species are at issue, the development of aquaculture in France, as at the global level, is based on the production of juveniles in hatcheries. My work has therefore more precisely the goal of acquiring knowledge about the nutritional needs, mechanisms of digestion and the development of these animals in order to improve... |
| Tipo: Text |
Palavras-chave: Skeleton development; Vitamins; Nutriment; Fish larvae; Egg quality; Reproduction; Nutrition; Shrimp larvae; Peneids. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/rapport-2086.pdf |
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| Alencar,Amanda Virgínia Oliveira; Nascimento,Germano Augusto Jerônimo do; Freitas,Ednardo Rodrigues; Souza,Davyd Herick; Costa,Monik Kelly de Oliveira; Rocha,Amanda Karen Santos. |
| Abstract: The objective of this work was to evaluate the inclusion of sunflower cake (SC) and the addition of enzymes in the ration of lightweight replacement pullets in the growth phase, as well as their effects on the variables feed consumption and conversion, productive performance, sexual maturity, egg quality at the beginning of the laying phase, and economic viability. Five hundred and forty pullets of the Hy-Line W-36 light line were used. The experimental design was completely randomized, in a 2×2+1 factorial arrangement, with two inclusion levels of SC (10 and 20%), with or without the addition of enzymes, and a control treatment. At the end of the growth phase (7 to 17 weeks age), 360 birds were transferred to the laying shed until their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Helianthus annuus; Alternative feedstuff; Egg quality; Exogenous enzymes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104309 |
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| Souza,Rosemary Pereira de Pedro; Laurentiz,Antonio Carlos de; Faria,Glaucia Amorim; Filardi,Rosemeire da Silva; Mello,Érica do Santos. |
| Abstract: The objective of this work was to evaluate the influence of the inclusion of soybean (Glycine max) gum in the diet of laying hens on egg production, egg external and internal quality, and economic viability, as well as of temperature and storage time on the oxidative stability of eggs. One hundred and eighty 40-week-old Lohmann-LSL layers were fed 0, 1, 2, 3, 4, and 5% soybean gum in the diet. In the economic analysis, the average productive performance of the layers and the cost of feed were considered. In order to evaluate oxidative stability, eggs were stored at room temperature (~30oC) or refrigerated (5oC) for 0, 7, and 21 days. The inclusion of soybean gum in the diet increased feed intake and also egg production, average weight, and mass.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg quality; Lecithin; Oxidative stability; Performance; Phosphatidylcholine. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104311 |
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| Filardi,RS; Junqueira,OM; Casartelli,EM; Laurentiz,AC; Duarte,KF; Assuena,V. |
| An experiment was carried out to evaluate the effect of replacing corn with pearl millet in commercial layer diets, formulated according to the minimal requirements for total and digestible amino acids. Two hundred and forty Lohmann LSL laying hens with 25 weeks of age were distributed in a completely randomized experimental design according to a 2 x 5 factorial arrangement with 3 replicates of 8 birds. Feed was formulated on two amino acid basis (total or digestible) according to Rostagno et al. (2000) and there were five pearl millet inclusion levels (0%, 25%, 50%, 75%, and 100%). Performance and egg quality were evaluated during five periods of 21 days.At the end of each period, feed intake, egg production, egg weight and feed conversion were evaluated.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digestible amino acids; Egg quality; Laying hens; Pearl millet; Performance; Total amino acids. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000200006 |
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| Domingues,C H de F; Sgavioli,S; Praes,M F F M; Castiblanco,D M C; Marchizeli,P C A; Pereira,A A; Duarte,K F; Junqueira,O M. |
| An experiment was carried out to evaluate the performance, egg quality and morphometry of the reproductive tract, liver, pancreas and tongue of laying hens submitted to different molting methods. Two hundred and eighty eight 72-week-old Isa brown layers were distributed according to a completely randomized design with six treatments (molting methods) and six replicates of eight birds each. Layers were fed diets containing 3000 ppm zinc oxide, 60 ppm or 120 ppm nicarbazin, 30 ppm or 60 ppm salinomycin, or were submitted to feed fasting. Data were submitted to analysis of variance and means were compared by the test of Tukey at 5% probability level. Molting methods alternative to feed fasting were effective to induce molting in layer and provided good... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food restriction; Performance; Egg quality; Morphometry. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200003 |
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| Santos,TC; Murakami,AE; Oliveira,CAL; Moraes,GV; Stefanello,C; Carneiro,TV; Feitosa,CCG; Kaneko,IN. |
| The influence of age (85, 140, and 270 days) of European quails breeders on the egg quality and hatching, fertility and progeny performance was evaluated. The experimental design was completely randomized in a 3x3 factorial arrangement (females' age x males' age), with ten replicates and six birds per experimental unit (four females and two males). Egg production and quality were determined during 3 periods of 14 days and incubation parameters were evaluated in eggs obtained in five consecutive days. The live performance of the progenies was analyzed until 35 days. There was no effect of male age or any interaction between the age of males and females for the evaluated variable. The female's age influenced egg production, egg weight and chick weight, with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeders; Egg quality; Hatching; Sperm-egg; Perivitelline layer; Quail. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000100049 |
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| Melo,RD; Cruz,FGG; Melo,LD; Feijó,JC; Rufino,JPF; Brasil,RJM; Oliveira Fº,PA; Silva,FMF. |
| ABSTRACT The objective of this study was to determine the ideal requirement of sodium to molted laying hens. The experimental period lasted 105 days, divided into five periods of 21 days. Hisex White laying hens 150 with 84 weeks-of-age were used. The experimental design was completely randomized in a factorial scheme (5x3) with treatments constituted by five levels of sodium (0.10, 0.15, 0.20, 0.25, and 0.30%) in the diets, and three postmolt stages (early = 21 days, medium = 63 days, and final = 105 days). Performance and egg quality results were evaluated by Tukey test at 5%. Eggshell resistance and weight gain results were evaluated by polynomial regression at 5%. Except the yolk height, all performance and egg quality variables were affected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg quality; Eggshell; Performance; Sodium; Weight gain. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100325 |
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| Pizzolante,CC; Kakimoto,SK; Saldanha,ESPB; Laganá,C; Souza,HBA; Moraes,JE. |
| This study aimed at evaluating the effect of dietary calcium levels and the replacement of calcium sources with different particle size compositions on the performance and egg quality of brown layers in their second egg production cycle. A randomized block experimental design was applied with 12 treatments in a 3x4 factorial arrangement: three calcium levels (2.6, 3.2, 3.8 %) and four combinations of calcium sources (1- 100% fine limestone (FL), 2- 50% FL + 50% coarse limestone (CL), 3- 50% FL and 50% oyster shell (OS), 4- 50% FL and 25% CL+ 25 %OS), with six replicates of eight birds each. Calcium sources were analyzed for geometric mean diameter (GMD) and in-vitro solubility. The following performance and egg quality parameters were evaluated: egg weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg quality; Levels; Minerals; Particle size; Performance; Sources. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200004 |
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| Zang,H; Zhang,K; Ding,X; Bai,S; Hernández,JM; Yao,B. |
| The experiment was conducted to evaluate the effects of different dietary vitamin combinations on the egg quality and vitamin concentrations in the eggs of commercial laying hens. A total of 1,800 25-week-old Lohman pink-shell hens were randomly assigned to four dietary vitamin treatments as follows: NRC(1994) level, NRC (1994) level with Hy.D® (25-hydroxy-cholecalciferol), Local level (current average industry level in China) and OVN® level (optimum vitamin nutrition level), with 10 replicates per treatment and 45 layers per replicate. Hens were housed in commercial laying cages with three birds per cage and given ad libitum access to feed. Results showed the hens that received the fortified vitamin levels in the OVN® treatment had a significantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Egg quality; Hy.D®; Laying hen; OVN®; Vitamin deposition. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000300005 |
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| Gebremedhn,B; Niguse,M; Hagos,B; Tesfamariam,T; Kidane,T; Berhe,A; Gebresilassie,L; Gebreegziabher,L; Gebremariam,T; Gebremeskel,Y. |
| ABSTRACT Poultry rations are composed mainly of conventional cereal grains and proteins. Using non-conventional agro-industrial by-products may reduce the cost of production and thereby improve productivity. A study was conducted to evaluate the effect of dietary brewery spent grain inclusion on egg laying performance, quality parameters of bovans brown and profitability of the rations. A total of 200 pullets with similar body weight and age were randomly distributed to five treatments with four replications. The treatments were brewery spent grain (BSG) inclusion of 0, 10, 20, 30 and 40% levels for T1, T2, T3, T4 and T5, respectively. The CP and ME contents of treatment rations were 16.54-17.04% and 2871-2903 kcal/kg DM, respectively. Inclusion of the BSG... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bovans brown; Brewery spent grain; Egg quality; Productivity; Profitability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200307 |
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| Registros recuperados: 85 | |
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