Consulta: subjectFacets:"Layer"
Registros recuperados: 13
Data/hora: 01/06/2024 06:01:51

Prospection en plongée du gisement d'oursins du Golfe du Morbihan (2008)
Provedor de dados: 5
Autores: Dimeet, Joel.
Une évaluation du gisement d'oursins du golfe du Morbihan a été réalisée en 2008.Six stations ont été échantillonnées : Stibiden, Roc'h Vihan, Port Blanc, Kerners, Hent tenn et Brannec, une station de plus que les années précédentes Pour les cinq stations communes à 2007 et 2008 l'augmentation de la population d'oursins est de 5 % en global et de 25% pour les individus commerciaux. Les densités totales varient entre 87 et 136 individus pour 100 m2 et les densités commerciales entre 56 et 87 oursins pour 100m2. La densité maximale d'oursins commerciaux a été observée à Port blanc. Les tailles des oursins s'échelonnent entre 22mm et 88mm. 63% des oursins échantillonnés avaient une taille supérieure à la taille de première commercialisation, soit 55mm.
Tipo: Text
Palavras-chave: Density; Size; Sampling; Survey; Gulf of Morbihan; Layer; Urchin; Densité; Taille; Évaluation; Échantillonnage; Golfe du Morbihan; Gisement; Oursin.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6775.pdf

Prospection en plongée du gisement d'oursins du Golfe du Morbihan (2007)
Provedor de dados: 5
Autores: Dimeet, Joel.
Une évaluation du gisement d'oursins du golfe du Morbihan a été faite en 2007. Le même protocole que les années précédentes a été utilisé. On constate cependant, qu'en règle générale, en 2007 par rapport à 2006 les quantités prélevées sont plus importantes sur toutes les stations sauf pour la station de Port Banc. Le fait que le plongeur qui a échantillonné cette zone soit non expérimenté pourrait expliquer cette différence...
Tipo: Text
Palavras-chave: Density; Size; Sampling; Survey; Gulf of Morbihan; Layer; Urchin; Densité; Taille; Évaluation; Échantillonnage; Golfe du Morbihan; Gisement; Oursins.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-6774.pdf

Prospection en plongée du gisement d'oursins du Golfe du Morbihan (2003 – 2006)
Provedor de dados: 5
Autores: Dimeet, Joel.
Une évaluation du gisement d'oursins du golfe du Morbihan a été effectuée tous les ans pendant la période 2003 - 2006 avec le même protocole.  Trois plongeurs sur quatre ont participé à toutes les plongées. Ceci nous permet de comparer les résultats d'une année sur l'autre même si les positionnements sur chaque zone ne sont pas parfaitement les mêmes et que les conditions météo (visibilité et courant) sont rarement similaires. Depuis 2003 on peut remarquer une progression constante des captures totales sur l'ensemble des stations, aussi bien pour les non commerciaux (&lt;55 mm) que pour les commerciaux. En 2003, la récolte représentait 19 % de la totalité des oursins (avec autant de commerciaux que de non commerciaux) tandis qu'elle représentait près de 31...
Tipo: Text
Palavras-chave: Brannec; Kerners; Hen tenn; Roc'h vihan; Port Blanc; Stibiden; Density; Size; Sampling; Survey; Gulf of Morbihan; Layer; Urchin; Brannec; Kerners; Hent tenn; Roc'h vihan; Port Blanc; Stibiden; Densité; Taille; Échantillonnage; Plongée; Golfe du Morbihan; Gisement; Oursin.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6773.pdf

Morphology of an Infundibulum of the Oviduct of the Sexually Mature Hens
Provedor de dados: 77
Autores: Khokhlov,R.Y.
Studied functional morphology of an infundibulum oviduct of the hens in an age interval 150-540 days. As indicators of development the following parameters served: length, weight, diameter of a infundibulum, sizes epithelial cells, height and width folds of a túnica mucosa, histological structure of a wall of a infundibulum. The results show dynamical increase of investigated parameters with 150- till 360-day's age, with their subsequent decrease to 540-day's age.
Tipo: Journal article
Palavras-chave: Oviduct; Reproductive system; Morphology; Layer.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400016

LAYERS '99, PART II: REFERENCE OF 1999 TABLE EGG LAYER MANAGEMENT IN THE U.S.
Provedor de dados: 31
The National Animal Health Monitoring System (NAHMS) is sponsored by the USDA:APHIS:Veterinary Services (VS). The NAHMS Layers '99 Study was designed to provide information about the nation's layer population for education and research purposes. The USDA's National Agricultural Statistics Service (NASS) collaborated with VS to select a statistically-valid sample from 15 states for Layers '99. The 15-state target population accounted for over three-quarters of the table egg layers in the U.S. as of December 1, 1998. The study was limited to companies with 30,000 or more layer. About two-thirds (68.1 percent ) of farm sites did not allow visitors that did not have a business reason for visiting the operation in the layer houses. The percentage of farm sites...
Tipo: Report
Palavras-chave: NAHMS; Layer; Layers; Layer house; Poultry; Pullet; Flock; Egg; Table egg; Lay; Biosecurity; Feeder; Visitor; Morbidity; Disease; Disinfect; Salmonella enteritidis; S.E.; Management; Molt; Production; Livestock Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/32765

LAYERS '99, PART I: REFERENCE OF 1999 TABLE EGG LAYER MANAGEMENT IN THE U.S.
Provedor de dados: 31
The National Animal Health Monitoring System (NAHMS) is sponsored by the USDA:APHIS:Veterinary Services (VS). The NAHMS Layers '99 Study was designed to provide information about the nation's layer population for education and research purposes. The USDA's National Agricultural Statistics Service (NASS) collaborated with VS to select a statistically-valid sample from 15 states for Layers '99. The 15-state target population accounted for over three-quarters of the table egg layers in the U.S. as of December 1, 1998. The study was limited to companies with 30,000 or more layers. While the majority of farm sites were contract farms (61.0 percent), the majority of birds were located on company owned farms (72.6 percent), indicating that company owned farms...
Tipo: Report
Palavras-chave: NAHMS; Layer; Layers; Poultry; Pullet; Flock; Egg; Table egg; Lay; Molt; Cage; Contract farm; Coccidiosis; Newcastle disease; Infectious bronchitis; Salmonella enteritidis; S.e.; Competitive exclusion; Laryngotracheitis; LT; Mycoplasma gallisep; Livestock Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/32757

Effect of Forced Molting on body characteristics and post-molting egg production performance of Layers in Quetta, Pakistan
Provedor de dados: 89
Autores: Rafeeq,M; Rashid,N; Awan,MA; Tariq,MM; Abbas,F; Ahmed,Z; Taj,I.
White leghorn layer (n=2740), with 85weeksof age, were submitted to forced molting by fasting for 13 days and changes in body characteristics and subsequent laying performance during second laying cycle were evaluated. Live body weight (LBW),ovary weight (OW), oviduct weight (OvW) and oviduct length (OvL) were measured before and after fasting. Post-fasting restricted feeding was applied, initially feeding crushed corn with added 2% Ca for 20 days and thereafter layer crumble feed was offered. Layers lost 632.16g (36%) of their LBW and significant reductions of 45.32, 47.53 and 54% were observed in post-fasting/molt OW, OvW and OvL, respectively (p&lt;0.05). Resting period was 49 days and birds consumed 4.79kg feed during resting period. Egg production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Layer; Force molting; Body characteristics; Production performance.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400009

Correlations between thermal environment and egg quality of two layer commercial strains
Provedor de dados: 89
Autores: Pereira,DF; Vitorasso,G; Oliveira,SC; Kakimoto,SK; Togashi,CK; Soares,NM.
Heat stress limits the productivity of laying hens, as reflected by egg production and egg quality. The present study aimed at showing the correlations between egg quality parameters and environmental variables recorded on the day eggs were laid and on the previous days. Birds were housed in battery cages in a commercial poultry house. Main component analyses were used to verify associations between environmental and production variables, and Pearson's linear correlation tests were used to further investigate those associations. Analyses were carried out separately for to layer strains, Dekalb® White and Hy-Line® w36, and the variables egg weight (g), eggshell weight (g), specific gravity (g/cm³) and eggshell percentage (%) were compared with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cage; Egg quality; Environment; Layer; Poultry house.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200002

Femur Properties of Embryo in the Layer Hybrid and Pure Breeds
Provedor de dados: 89
Autores: Onbaşılar,EE; Güngör,ÖF; Demir,T; Erbay,FK Elibol; Kahraman,M; Taban,S; Çalık,A; Pirpanahi,M.
ABSTRACT Layer hybrids are more superior in the egg yield than pure breeds. But this superiority causes some problems in the bones during the production period. There are a lot of differences among genotypes in the production period that have been examined extensively, however, the differences throughout incubation period aren’t known yet. Thus, the objective of this study was to evaluate the differences in femur properties of pure breed and layer hybrid embryos during the incubation period. A total of 354 fresh hatching eggs were used from one hybrid (Lohman White) and two pure breeds (Denizli &amp; Gerze). The eggs were incubated. Hatching eggs from each genotype at the beginning of embryonic days (E) 19 and E21 were examined. At these embryonic ages, 12...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Layer; Pure breed; Hybrid; Embryo; Femur.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400805

A morphometric method of sexing white layer eggs
Provedor de dados: 89
Autores: Yilmaz-Dikmen,B; Dikmen,S.
The present study was carried out to determine the sex of the fertilized white layer eggs with using morphological measurements. A total of 300 Super Nick White Layer (54 wks of age) eggs were incubated and sexed in the end of incubation period. Before incubation egg length, width and weight were measured. The egg volume and shape index were estimated with using these measurements for each egg. The effect of egg weight and replicate number was not significant on the sex of the hatching chick (p &amp;gt; 0.05). The effects of egg shape index (p = 0.001), egg length (p = 0.0018), egg width (p &lt; 0.01) and volume (p = 0.004) of the egg had significant effect on the sex of hatching chick. According to the results of the current study, morphological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphometric measurements; Pre-incubation; Sexing; Layer.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000300006

Effect of vitamin K on bone integrity and eggshell quality of white hen at the final phase of the laying cycle
Provedor de dados: 96
Autores: Fernandes,Jovanir Inês Müller; Murakami,Alice Eiko; Scapinello,Claudio; Moreira,Ivan; Varela,Elkin Varela.
The effect of four levels of dietary vitamin K (vit. K) on production, egg quality and bone structure of laying hens near the end of the production cycle were studied. A total of 192 Hy-Line, W-36 hens, 67 weeks of age, were distributed into a completely randomized design with four treatments (0, 2, 8, 32 mg vit. K/kg of diet), six replicates and eight birds per experimental unit. Corn-soybean-meal basal diets were isonitrogenous (15.5% crude protein), isoenergetic (2,790 kcal ME/kg), isocalcium (4.25% Ca) and isophosphorus (0.40% available P). Vitamin K supplementation did not alter egg mass, feed intake, feed conversion (kg/kg), bone breaking strength, specific egg gravity, eggshell weight, thickness and percentage of thin and cracked shell. A linear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eggshell quality; Layer; Osteoporosis.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000300013

Effects of fennel seed supplementation of ration on performance, egg quality, serum cholesterol, and total phenol content of egg yolk of laying quails
Provedor de dados: 96
Autores: Buğdaycı,Kadir Emre; Oğuz,Fatma Karakaş; Oğuz,Mustafa Numan; Kuter,Eren.
ABSTRACT The objective of this research was to evaluate the effects of fennel seed (Foeniculum vulgare Mill.) supplementation of ration on performance, egg quality, and serum cholesterol of laying quails during an eight-week period. For this purpose, 96 quail (Coturnix coturnix japonica) of 16 weeks of age were evenly separated into one control group and three treatment groups. Each group was divided into four replicates, each containing six quail. The fennel seeds (Foeniculum vulgare) were added to the diets of the first, second, and third treatment groups at levels of 0.3, 0.6, and 0.9%, respectively. No significant effect of dietary fennel seed supplementation was recorded on body weight, feed intake, egg production, and egg weight. Feed efficiency (kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbal additive; Layer; Mediterranean seed; Phenolics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100519

The occurrence of Orthoreovirus, Rotavirus and chicken anemia virus in chickens of the poultry industry in Minas Gerais, Brazil
Provedor de dados: 45
Autores: Rios,R.L.; Marin,S.Y.; Gomes,A.M.; Resende,J.S.; Bonfim,M.R.Q.; Gomes,A.D.; Resende,F.M.S.; Horta,R.S.; Resende,M.; Martins,N.R.S.
Fifty-four fecal samples taken from broiler chickens from 1 to 45 days of age, and of pullets from 10 to 13 weeks of age, original from eight different poultry regions in the state of Minas Gerais, Brazil, were collected from March 2008 to January 2010 for avian Orthoreovirus (ARV) and avian Rotavirus (AvRV) analyses. For the assay of ARV, RNA was immediately extracted (Trizolâ) and transcribed into cDNA for assaying in a nested-PCR with ARV-specific primers. For AvRV, polyacrylamide gel electrophoresis (PAGE) was performed with RNA extracts obtained by phenol-chloroform extraction. CAV was additionally investigated through a nested-PCR of thymus and spleen. Results found 5.55% positive for ARV and 9.25% for AvRV. Also, CAV and ARV genomes were detected in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler; Layer; Chicken anemia virus; CAV; Avian reovirus; ARV; Avian rotavirus; AvRV; Nested-PCR; PAGE.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000600030