Consulta: subjectFacets:"Egg production"
Registros recuperados: 69
Data/hora: 09/06/2024 18:02:00

TECHNICAL FEASIBILITY OF THE ACCLIMATIZATION SYSTEM IN AVIARY OF POSTURE: A CASE STUDY
Provedor de dados: 70
Autores: Pereira,Danilo F.; Kodaira,Vanessa; Bueno,Leda G. de F.; Soares,Nilce M.; Salgado,Douglas D'Alessandro.
ABSTRACT: The objective of this study was to compare the performance of laying hens between automated aviaries, one with and another without acclimatized system. On a daily basis it was registered in each aviary the mortality, the egg production, and the feed consumption. The variables of the dry bulb temperature, relative humidity and black globe temperature were registered every 30 minutes using the thermos hygrometer. Every 28 days ninety eggs from each aviary were collected randomly and the variables egg weight, shell weight, shell thickness and Haugh Unit were registered. The consumption and quality of the electrical energy supply were monitored every 30 minutes using registers of electrical magnitude. The results showed that the acclimatization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Electrical energy; Mortality; Egg production; Precision animal science.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500855

The association of very low-density lipoprotein receptor (VLDLR) haplotypes with egg production indicates VLDLR is a candidate gene for modulating egg production
Provedor de dados: 74
Autores: Wang,ZhePeng; Meng,GuoHua; Li,Na; Yu,MingFen; Liang,XiaoWei; Min,YuNa; Liu,FuZhu; Gao,YuPeng.
Abstract The very low-density lipoprotein receptor (VLDLR) transports egg yolk precursors into oocytes. However, our knowledge of the distribution patterns of VLDLR variants among breeds and their relationship to egg production is still incomplete. In this study, eight single nucleotide polymorphisms (SNPs) that account for 87% of all VLDLR variants were genotyped in Nick Chick (NC, n=91), Lohmann Brown (LohB, n=50) and Lueyang (LY, n=381) chickens, the latter being an Chinese indigenous breed. Egg production by NC and LY chickens was recorded from 17 to 50 weeks. Only four similar haplotypes were found in NC and LohB, of which two accounted for 100% of all NC haplotypes and 92.5% of LohB haplotypes. In contrast, there was considerable haplotypic diversity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken; Egg production; Haplotype; Very low-density lipoprotein receptor (VLDLR).
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300380

Entendendo as medidas para a produção de ovos saudáveis. Avicultura Industrial, Itu, ed. 1245, ano 106, n. 06, p. 22-29, 2015.
Provedor de dados: 14
Autores: JAENISCH, F. R. F.; DUARTE, S. C.
A adoção dos cuidados de biosseguridade no setor de produção visa minimizar riscos à saúde das aves por meio de ações basicamente preventivas à introdução de patógenos nos plantéis. Exige o comprometimento de todos, garantindo não só a qualidade sanitária do plantel e seus produtos, como também preservando a competitividade do setor produtivo.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Produção de ovo; Qualidade do ovo; Ovo; Biossegurança; Sanidade animal; Egg production; Egg quality; Biosecurity.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1031311

Mecanismos de invasão do ovo por Salmonela sp.
Provedor de dados: 14
Autores: DUARTE, S. C.; RAUECKER, U. N.; REZENDE, C. S. M.
Com o intuito de gerar melhor compreensão da dinâmica de infecção por Salmonella sp. no trato reprodutor de poedeiras reunimos algumas informações acerca dos principais mecanismos envolvidos na persistência da bactéria no trato reprodutivo de poedeiras e os elementos envolvidos na contaminação de ovos.
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Poedeira; Produção de ovos; Contaminação de ovos; Reprodução animal; Galinha para postura; Salmonella; Egg production.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1069583

Boas práticas na produção de ovos comerciais para poedeiras alojadas em gaiolas.
Provedor de dados: 14
Autores: MAZZUCO, H.; HENN, J. D.; JAENISCH, F. R. F.; ABREU, P. G. de; MATTHIENSEN, A.; NICOLOSO, R. da S.; DUARTE, S. C.; AVILA, V. S. de; ROSA, P. S.; KLEIN, C. H.; KUNZ, A.; HIGARASHI, M. M.
bitstream/item/159258/1/final8255.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sistema de produção; Ovo; Egg production.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1065481

Impact of egg production and stock structure on MSY reference points and its management implications for southern hake (Merluccius merluccius)
Provedor de dados: 5
Autores: Cervino, Santiago; Dominguez-petit, Rosario; Jardim, Ernesto; Mehault, Sonia; Pineiro, Carmen; Saborido-rey, Fran.
Spawning stock biomass (SSB) is one of the most common measures of stock status. However recent research on reproductive potential has shown that alternative variables may be an improvement over SSB. In the case of European hake (Merluccius merluccius), it is known that large individuals produce more eggs by unit of body weight, and their quality is better than those of small individuals. Under these circumstances, application of reproductive potential may be pertinent in the implementation of the Johannesburg agreement, since it is not only the spawning biomass but also its age or length structure that defines stock productivity and its ability to achieve maximum sustainable yield (MSY). In this contribution we used an age-length structured population...
Tipo: Text
Palavras-chave: Egg production; Biological reference points; Steepness; Length based models; Hake.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00161/27254/25487.pdf

Ecologie du copépode calanoïde Paracartia grani. Implication dans le cycle de vie du parasite Marteilia refringens dans la lagune de Thau
Provedor de dados: 5
Autores: Boyer, Séverine.
In this study, the life cycle of Paracartia grani, a calalloid copepod belonging to the Acartiidae family was determined in Thau lagoon. Indeed, the copepod involvement in the life cycle of the parasite Marteilia refringens affecting the bivalve productions is suspected. Mesozooplanktonic community .was monitored twice a month. over two years at a fixed station in the lagoon. Sampling has identified P. grani as the acartiid dominant species in summer. From April to January, the copepod is found in the water column while from February to early April it remains in the sediment as diapausing eggs. The analysis of the population structure (size spectmm, contribution of developmental stages and sex ratio) has revealed that there are in between 6 and 9...
Tipo: Text
Palavras-chave: Paracartia grani; Cycle de vie; Production d'oeufs; Oeufs de diapause; Mésozooplancton; Marteilia refringens; Mytilus galloprovincialisa; Ruditapes decussatus; PCR; Hybridation in situ; Lagune de Thau; Paracartia grani; Life cycle; Egg production; Diapause eggs; Mesozooplankton; Marteilia refringens; Mytilus galloprovincialis; Ruditapes decussatus; PCR; In situ hybridization; Thau lagoon.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00118/22931/21482.pdf

Temporal and spatial patterns of laying in the Moluccan megapode Eulipoa wallacei (G.R. Gray)
Provedor de dados: 16
Autores: Baker, G.C.
The Moluccan megapode Eulipoa wallacei (G.R. Gray, 1860) lays its eggs at night in the sand at communal nesting beaches. The majority of the world’s Moluccan megapode population rely on only two nesting grounds on the islands of Halmahera and Haruku, Indonesia. An understanding of the ecological characteristics of these breeding sites is thus important in terms of conservation. Studies of the largest of the two nesting grounds in Halmahera have shown specific temporal and spatial patterns of egg laying. In this paper I discuss the adaptive significance and conservation implications of these laying patterns.
Tipo: Article / Letter to the editor
Palavras-chave: Moluccan megapode; Eulipoa wallacei; Egg production; Lunar synchrony; 42.83.
Ano: 1999
URL: http://www.repository.naturalis.nl/record/219420

Individual, local and subspecific variation in female Hermann’s tortoise (Testudo hermanni) reproductive characters
Provedor de dados: 16
Autores: Longepierre, S.; Grenot, C.; Hailey, A.
We studied reproductive characters of a population of the tortoise Testudo h. hermanni in the Plaine des Maures (Var), and compared these to another population in southern France and to T. h. boettgeri in Greece. Clutch characters, which are measures of total reproductive investment, showed no differences between subspecies or sites after body size correction by ANCOVA. Egg characters, which measure the division of this investment among offspring, did vary significantly among both subspecies and sites after correcting for body mass. The presence of such local variation should discourage relocation of the threatened T. h. hermanni even between populations of the same subspecies.
Tipo: Article / Letter to the editor
Palavras-chave: Egg production; Clutch characters; Conservation; Tortoise; Testudo hermanni.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/534330

Comparative reproductive biology of the social parasite Acromyrmex ameliae de Souza, Soares &amp;amp; Della Lucia and of its host Acromyrmex subterraneus subterraneus Forel (Hymenoptera: Formicidae)
Provedor de dados: 82
Autores: Soares,Ilka M F; Della Lucia,Terezinha M C; Pereira,Alice S; Serrão,José E; Ribeiro,Myriam M R; Souza,Danival J de.
Social parasites exhibit several characteristics that allow them to exploit their host species efficiently. The smaller size of parasite species is a trait commonly found in ants. In this work, we investigated several aspects of the reproductive biology of Acromyrmex ameliae De Souza, Soares &amp;amp; Della Lucia, a recently discovered parasite of Acromyrmex subterraneus subterraneus Forel. Sexuals of A. ameliae are substantially smaller than those from host species. Parasite queens laid significantly less worker eggs than host queens and inhibit sexual production of the host. The sex ratio of parasite species is highly female biased. Interestingly, we have observed parasite coupling on the laboratory, inside the nests and in the ground, opening the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Social parasitism; Egg production; Size reduction.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000500007

Laboratory environment effects on the reproduction and mortality of adult screwworm (Diptera: Calliphoridae)
Provedor de dados: 82
Autores: Berkebile,Dennis R.; Sagel,Agustin; Skoda,Steven R.; Foster,John E.
The New World screwworm, Cochliomyia hominivorax Coquerel, is mass reared for screwworm eradication initiatives that use the sterile insect technique. New methods for rearing have helped to reduce the cost of the eradication program. We examined the effect and interaction of three temperatures (24.5, 29.5 and 34.5ºC), two diets (2% spray-dried blood plus 0.05% vitamins and corn syrup carrageenan) and three population densities (300, 400, and 500 flies/cage) on egg production, egg hatch, number of observable fertilized eggs, mortality (male and female) and ovarian development. The three population densities did not affect any of the parameters monitored. Using the protein diet increased egg production at all temperatures. Diet did not affect egg hatch or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Temperature; Cochliomyia hominivorax; Egg production; Ovarian development.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000600010

産卵鶏における体重推移と産卵性との関係
Provedor de dados: 19
Autores: 三好, 俊三; 太田, 奈緒; 口田, 圭吾; 光本, 孝次; Miyoshi, Syunzo; Ohta, Nao; Kuchida, Keigo; Mitsumoto, Takatsugu.
Palavras-chave: 産卵鶏; 体重推移; 産卵率; 卵構成; Egg-type chicken; Body weight; Egg production; Egg components.
Ano: 1995
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1403

放卵時刻のずれ(LAG)を用いた選抜指数による年間産卵数の遺伝的改良
Provedor de dados: 19
Autores: Luc, Kieu Minh; Miyoshi, Shunzo; Kuchida, Keigo; Mitsumoto, Takatsugu.
Palavras-chave: Oviposition time; Egg production; Selecetion index; Laying hen; 放卵時刻; 産卵; 産卵鶏; 選抜指数.
Ano: 1997
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1306

Duckweed in Irrigation Water as a Replacement of Soybean Meal in the Laying Hens’ Diet
Provedor de dados: 89
Autores: Zakaria,HA; Shammout,MW.
ABSTRACT Water lentils (Duckweed [DW])(Lemna gibba), in irrigation ponds, was evaluated by replacing two levels of soybean meal (SBM) on performance and egg quality of laying hens of 54 weeks of age. A total of 72 white Lohmann laying hens were randomly allocated into 3 treatments with 6 replicates/treatment, 4 hens/replicate in a randomized complete block design. Treatments were: control group (DW0%) with (SBM) as the main source of protein, T1 (DW10%) and T2 (DW20%), where duckweed replaced 10% and 20% of SBM for 9 weeks. No significant differences were observed among the dietary treatments in body weight change, feed conversion ratio, egg weight and mortality rate. Replacement with (DW20%) decreased (p&lt;0.05) feed intake, egg laying rate and egg mass....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lemna Gibba; Water quality; Alternative protein source; Egg production; Yolk pigmentation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300573

High-fiber diets with reduced crude protein for commercial layers
Provedor de dados: 89
Autores: Praes,MFFM; Junqueira,OM; Pereira,AA; Filardi,RS; Duarte,KF; Sgavioli,S; Alva,JCR; Domingues,CHF.
This study aimed at evaluating diets containing different fiber sources and two crude protein levels on the performance, egg quality, and nitrogen metabolism of commercial layers. In total, 392 48-wk-old Isa Brown layers were distributed according to a completely randomized experimental design in a 3x2+1 (control) factorial arrangement, resulting in seven treatments with seven replicates of eight birds each. Treatments consisted of three fiber feedstuffs (cottonseed hulls, soybean hulls, and rice hulls) and two dietary crude protein levels (12% and 16%). Cottonseed hulls associated with the high crude protein level (16%) resulted in the worst feed conversion ratio per dozen eggs. Diets with 16% crude protein resulted in the highest feed intake, egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rice hulls; Cottonseed hulls; Soybean hulls; Crude protein; Egg production.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000200006

The Effect of Different Levels of Lentil by Product on Growth Performance, Carcass Traits and Egg Yield in Quail (Coturnix Coturnix Japonica)
Provedor de dados: 89
Autores: Ayaşan,T; Sogut,B; Inci,H.
ABSTRACT The subject of this study was to evaluate the effects of lentil byproduct (LP) on growth performance, carcass traits and egg yield of quail (Coturnix coturnix Japonica). To achieve this goal, a total of 600 0-day-old quail chicks were used. The birds were divided into 5 groups with 3 replicates. The 1st, 2nd, 3rd, 4th and 5th groups received 0, 5, 10, 15 and 20% lentil byproduct, respectively. All the diets were prepared as isonitrogenous and isocaloric. As a result of this study, the highest live body weights of quails as Laudadio mixed gender were observed in the 3rd (195.5 g) and 5th (195.3 g) groups at the end of the study, however the differences between the control and treatment groups were not significant (p&gt;0.05). Similar results were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carcass; Egg production; Fattening; Lentil byproduct; Quail; Yolk color.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400773

Effects of dietary calcium levels and limestone particicle size on the performance, tibia and blood of laying hens
Provedor de dados: 89
Autores: Pelicia,K; Mourao,JLM; Garcia,EA; Pinheiro,VMC; Berto,DA; Molino,AB; Faitarone,ABG; Vercese,F; Santos,GC; Silva,AP.
A total of 405 23-week-old ISA® Brown layers were distributed in a completely randomized experimental design in a factorial arrangement with nine treatments consisting of three dietary calcium levels (3.5, 3.75, and 4.5%) and three limestone particle sizes (100% fine limestone (FL), 70% FL + 30% coarse limestone (CL) and 50% (FL) + 50% (CL)), with nine replicates of five birds per cage. The following parameters were evaluated: percentage of lay, defective eggs, egg weight, egg mass, feed intake, feed conversion ratio (per kg eggs and per dozen eggs), and mortality. Dietary Ca levels significantly affected lay, with birds fed diets containing 4.5% calcium producing less eggs as compared to those fed 3.0 and 3.75% Ca. Egg production linearly decreased as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Mineral nutrition; Mineral particle size.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000100005

Effect of cage density on the performance of 25- to 84-week-old laying hens
Provedor de dados: 89
Autores: Rios,RL; Bertechini,AG; Carvalho,JCC; Castro,SF; Costa,VA.
Three experiments were carrie out to evaluate the influence of cage density on the performance of 25- to 84-week-old laying hens. Forty hundred Lohmann-LSL layers were distributed in cages (100x40x 45x50cm) according to a completely randomized experimental design with split plot in time.Three treatments (10, 12, or 14 hens per cage, corresponding, to 450, 375, and 321cm²/bird, respectively), with 15 assessment periods (four weeks each), and eight replicates per treatment were applied. Considering that layer's production cycle is affected by age, three experimental trials (25 to 44; 45 to 64 and 65 to 84 weeks of age) were carried out, and the data collected in each trial was individually analyzed. Increasing cage density significantly reduced feed intake...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds per cage; Cage density; Egg production; Laying hens.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400007

Forced-Molting methods and their effects on the performance and egg quality of japanese quails (Coturnix japonica) in the second laying cycle
Provedor de dados: 89
Autores: Faitarone,ABG; Garcia,EA; Pizzolante,CC; Molino,AB; Pelícia,K; Berto,DA.
The experiment was carried out in the experimental poultry house of the Research and Development Unit of Brotas of Agência Paulista de Tecnologia dos Agronegócios do Centro-Oeste, SP, Brazil. The objective of the study was to evaluate the performance of Japanese quails submitted to forced molting aiming at optimizing the use of the same quail flock by promoting a second laying cycle. A total number of 400 67-day-old Japanese quails in lay, previously submitted to 14 days of forced molting, was distributed in a completely randomized experimental design into five treatments (T1= not submitted to forced molting, T2= 03 days of fasting + fed ad libitum, T3= 01 days of fasting + 13 days of feed restriction, T4= 02 days of fasting + 12 days of feed restriction,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Feeding management; Feed restriction; Poultry.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000100008

Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle
Provedor de dados: 89
Autores: Pelicia,K; Garcia,E; Móri,C; Faitarone,ABG; Silva,AP; Molino,AB; Vercese,F; Berto,DA.
This study evaluated the effect of dietary calcium levels and limestone particle size distribution on first-cycle layer performance and egg quality. A completely randomized experimental design in 4x3 factorial arrangement (four Ca levels - 3.0, 3.5, 4.0, 4.5%; and three limestone particle size distributions - 100% fine, 50% fine and 50% coarse, 30% fine and 70% coarse) was applied, totaling 12 treatments with six replicates of eight birds each. The treatments did not influence the most of evaluated performance and internal and external egg quality parameters. However, limestone particle size distribution quadratically affected with percentage of defective eggs, with the lowest percentage obtained with the distribution 61.75% fine limestone and 38.25%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Limestone; Marketable eggs; Nutrition; Poultry.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200003

Evaluation of the Chloride Requirement of the Broiler Breeder Hen
Provedor de dados: 89
Autores: Harl,JC; Harms,RH; Wilson,HR; Russel,GB.
Two experiments wore conducted to evaluate the chloride requirement of the broiler breeder hen. Experiments were conducted for a twelve-week period and seven experimental diets wore fed. The diets contained the following dietary chloride levels: 0. 040, 0. 047, 0. 054, 0.060, 0.073, 0.09g, and 0. 174%. Sodiam bicarbonate was used to maintain a constant level of sodium. Levels of dietary chloride below 0.054% reduced EF; EW, &amp;amp; EC (ED X (EW-shell wt). Also, the highest level of dietary chloride reduced all characteristics. Dietary chloride did not have a significant effect on body weight gain or fertility and hatchability of eggs. The Nationa/ Research Council (1994) suggests that the broller breeder hen have daily chloride intake of 185 milligrams...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeder; Chloride; Egg production; Egg weight; Hatchability.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2000000300007

Cobalt and vitamin B12 in diets for commercial laying hens on the second cycle of production
Provedor de dados: 89
Autores: Kato,RK; Bertechini,AG; Fassani,EJ; Santos,CD; Dionizio,MA; Fialho,ET.
The supplementation of cobalt and vitamin B12 in diets for commercial laying hens on the second production cycle was studied. Four hundred and eighty light commercial laying hens, Lohmann LSL, were used at initial phase of forced molting laying period. The trial was conducted in a randomized design. The plots were the treatments which were constituted by combination of five cobalt levels (0.00; 0.30; 0.60; 0.90 and 1.20ppm) and two vitamin B12 levels (without and with 10µ/kg), and the split-plots were four periods (21, 42, 63 and 84 days) during the second period of production, with 4 repetitions and 12 hens per experimental unit. Food and water were provided ad libitum and eggs were collected twice daily. Performance and egg quality parameters were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cobalt; Egg production; Laying hens; Nutrition; Vitamin B12.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000100006

Arthrospira (Spirulina) Platensis Can Be Considered as a Probiotic Alternative to Reduce Heat Stress in Laying Japanese Quails
Provedor de dados: 89
Autores: Hajati,H; Zaghari,M; Oliveira,HC.
ABSTRACT This study was conducted to investigate the effects of Arthrospira platensis (Spirulina platensis, SP) on feed intake, feed conversion ratio, egg weight, hen day egg production, intestinal microflora, heat stress biomarkers, and HSP70 gene expression in laying Japanese quails (Coturnix coturnix japonica) suffering heat stress condition. A total of 250 female quails were allocated to 5 treatments, 5 replicates and 10 birds in each replicate in a completely randomized design. Experimental treatments included: 1) basal diet, 2) basal diet+ 0.03 % probiotic, 3) basal diet+ 0.1 % SP, 4) basal diet+ 0.3 % SP, 5) basal diet+ 0.5 % SP. During the last 6 days of the experiment, the quails were exposed to 8h of 34±1°C. The birds had free access to feed and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Heat stress; HSP70 gene; Japanese quails; Spirulina platensis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000100307

Assessment of a probiotic Containing Bacillus Subtilis on the Performance and Gut Health of Laying Japanese Quails (Coturnix Coturnix Japonica)
Provedor de dados: 89
Autores: Manafi,M; Khalaji,S; Hedayati,M.
ABSTRACT The present study was carried out to determine the effects of the inclusion of a spore-forming probiotic (Bacillus subtilis) in laying Japanese quail diets as an alternative to growth-promoting antibiotics to help produce healthy eggs and meat. This experiment was conducted as a completely randomized design with three treatments (control, 0.05% bacitracin methylene disalicylate (BMD), or 0.1% Bacillus subtilis) of five replicates of 11 quails each. Feed intake and egg production were recorded daily on cage basis. Body weight was determined at the beginning and end of the trial (36 and 42 weeks). At the end of the experiment (42 weeks), antibodies against Newcastle disease and avian influenza, egg components, Haugh units, eggshell quality and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Japanese quails; Egg production; Gut health; Immune response.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400599

Selection for reproductive traits in white egg stock using independent culling levels
Provedor de dados: 89
Autores: Schmidt,GS; Figueiredo,EAP.
The objective of this study was to report the response to selection for fertility and hatchability in white egg layers strains, based on sire and dam performance, and the effects of inbreeding on these traits. Two selected white egg strains (CC and DD) from Embrapa´s poultry program under multiple trait selection were compared to a control strain (CCc). The control strain was established by randomly mating one male from each sire family to a non-related female from each dam family and was used to monitor genetic change in the selected lines. CC and DD were selected using family and individual information on hen-day egg production up to 40 weeks of age, egg weight, sexual maturity and 16-week-old body weight over five generations. Independent culling levels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Inbreeding; Reproductive traits; Selection culling levels.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000400006

Climate Change in Layer Poultry Farming: Impact of Heat Waves in Region of Bastos, Brazil
Provedor de dados: 89
Autores: Lamarca,DSF; Pereira,DF; Magalhães,MM; Salgado,DD.
ABSTRACT The region around the municipality of Bastos, state of São Paulo, accounted for about 7% of Brazilian egg production in 2015. In 2012, it experienced a heat wave that resulted in the death of approximately 500,000 hens, according to information released at the time. Considering the impact of heat waves on layer mortality, the objective of this study was to analyze how heat waves impact the layer farming in the region of Bastos, considering the climate change scenarios forecasted by the IPCC for the next years. This study was conducted in three stages: i) analysis of the IPCC reports to understand climate change scenarios; ii) analysis of historical temperature data in the region of Bastos; iii) analysis of how climate change, through heat waves,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Extreme event; IPCC; Laying hens; Mortality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400657

Complete replacement of corn by white or red sorghum in japanese quail feeds
Provedor de dados: 89
Autores: Freitas,ER; Raquel,DL; Nascimento,AJN; Watanabe,PH; Lopes,IRV.
This study aimed at evaluating the total replacement of corn by white or red sorghum and the inclusion or not of pigment in the diet on the performance and yolk color of Japanese quail eggs. In the trial, 210 Japanese quails were distributed according to a completely randomized experimental design consisting of five treatments with six replicates of seven birds each. Treatments consisted of Corn-based diet (C), white sorghum-based diet (WS), white sorghum-based diet + pigment (WSP), red sorghum-based diet (RS), and red sorghum-based diet + pigment (RSP). Feed intake, feed conversion ratio, egg production, and egg mass were no influenced by the treatments. However, paler egg yolks were produced when corn was replaced by sorghum. When red and white sorghum...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Yolk color; Egg production; Egg quality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300016

Protein requirement of Japanese quail (Coturnix coturnix japonica) during rearing and laying periods
Provedor de dados: 89
Autores: Soares,R da TRN; Fonseca,JB; Santos,AS de O dos; Mercandante,MB.
Two completely randomized trials were conducted to estimate protein requirements of Japanese quails during the rearing and laying periods. In each trial, 150 quails were distributed in five treatments with five repetitions. Crude protein levels in the rearing period were 18, 20, 22, 24 and 26% (Trial 1) and during the laying period were 16, 18, 20, 22 and 24% (Trial 2). A quadratic effect of protein level was observed on weight gain from seven to 35 days (Trial 1). There were no effects of protein levels on feed intake and feed conversion. Protein levels in experimental diets during rearing had no effect on egg production up to 63 days. However, laying was delayed and variation in body weight was greater in quails fed lower protein levels. In Trial 2, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude protein; Egg production; Japanese quails.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000200010

Feeding programs to induce molting in Japanese quails (Coturnix japonica)
Provedor de dados: 89
Autores: Faitarone,ABG; Garcia,EA; Pizzolante,CC; Molino,AB; Pelícia,K; Berto,DA.
The experiment was carried out in the experimental poultry house of the Research and Development Unit of Brotas of Agência Paulista de Tecnologia dos Agronegócios do Centro-Oeste, SP, Brazil. The objective of the study was to evaluate forced-molting methods and their effects on body weight, egg production, feed intake, and mortality, as well as bird performance during the second laying cycle. A total number of 400 65-week-old Japanese quails was distributed in a completely randomized experimental design into five treatments, with four replicates of 20 birds each. The following treatments were applied: T1= not submitted to forced molting, T2= 01 day of fasting + 13 days receiving 15g feed/bird/day (1F+R), T3= 02 days of fasting + 12 days receiving 15g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Coturnix japonica; Egg production; Fasting.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000100002

Influence of feeding time on sexual maturity and carcass composition in female broiler breeders
Provedor de dados: 89
Autores: Avila,VS de; Penz Jr.,AM; Rosa,PS; Brum,PAR de; Guidoni,AL; Ledur,MC.
One thousand two hundred and ninety six Arbor Acres females and 144 males were used to study the influence of feeding time on sexual maturity and carcass composition. Treatments were: T1 = feeding at 6:30 am, T2 = 50% feeding at 6:30 am and 50% at 3:30 pm (dual), T3 = feeding at 11:00 am, T4 = feeding at 3:30 pm. Nutrition and management were as recommended to the commercial line. Variables studied were: sexual maturity at 5% production (SM), mean egg production percentage (PEP) body weight (BW), carcass composition, tibia weight (TIBW) and tibia calcium (Ca) and phosphorus (P) contents. Analysis of variance was used, and the means were compared using Student's t test. T2 females reached SM at 25.92 weeks, which was earlier (p&lt;0.01) than the other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler breeders; Carcass composition; Egg production; Feeding time; Sexual maturity.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000300006

Mathematical Model to Compare Egg Production C
Provedor de dados: 89
Autores: Fialho,FB; Ledur,MC; Avila,VS.
A segmented polynomial model was used on several egg production curves in an attempt to analyze the differences between the curves in a more descriptive manner. Production curves from different commercial and experimental genetic lines of layers were used. The parameters of the model include the age and level of peak production, rate of decrease in production after the peak and time between start and peak of production. These and other derived variables were compared between the curves using contrasts. The methodology used allowed an easier interpretation of the curves, and the detection of differences in sexual maturity, uniformity and peak of production. This work validates the segmented polynomial model for use in future research dealing with analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Layers; Laying hens; Model.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2001000300002

Comparison of National and International Standards of Good Egg Production Practices
Provedor de dados: 89
Autores: Sousa,GP; Pereira,DF; Watanabe,K; Cataneo,PF.
ABSTRACT Egg production is an important economic activity in Brazil, with about 697 million eggs produced annually. The conventional cage system is commonly used for egg production. However, there has been a growing concern for the welfare of laying hens around the world. In this context, many countries have issued laws, protocols, and other normative technical specifications to ensure the welfare of layers. This study aims at identifying similarities and differences between international standards and Brazilian protocols using the Comparative Law perspective. This article reports an analytical study of selected protocols, performing three analyses using the Comparative Law method. The research concludes that some items of the Brazilian protocols of good...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Animal welfare; Comparative Law; Legislation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000400581

Production aspects of broiler breeders submitted to different drinker types
Provedor de dados: 89
Autores: Colvero,LP; Carrijo,AS; Garófallo,RG; Bernardi,R; Steffen,RPB; Stefanello,C.
The objective of this study was of evaluate the influence of different drinker types on the egg production, water intake, mortality, poultry litter relative humidity, egg weight, eggshell percentage, and egg specific gravity of broiler breeders. The experiment was carried out in a commercial farm with 37- to 44-wk-old broiler breeders. A randomized block experimental design, consisting of two treatments (bell or nipple drinkers) with four replicates of 4.000 females each, was applied. Data were submitted to analysis of variance, and means were compared by the test of Student-Newman-Keuls at 5% significance level. Birds submitted to nipple drinkers presented lower water intake (p&lt;0.05). There was no influence (p&amp;gt;0.05) of drinker type on egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intake; Gravity; Nipple drinkers; Bell drinker; Egg production.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000100009

Ovarian Morphology and Egg Quality Traits of Egyptian Selected Strain for Egg Production Compared with Commercial Laying Strains
Provedor de dados: 89
Autores: Nassar,FS; El-Komy,EM; Abdou,AM.
ABSTRACT An experiment was conducted to evaluate the effect of selection for egg production performance of Cairo L-2 strain, as a local layer strain, after five generations of selection on productivity, ovarian morphology and some egg quality traits versus commercial Lohmann Brown-Lite (LBL) strain. The performance in the 5th generation was evaluated in Cairo L-2 and LBL strains for live body weight at sexual maturity (BWSM), age at sexual maturity (ASM), first egg weight (FEW), ovarian morphology, ovarian follicles number, ovarian weights and diameter, oviduct weight, liver weight, and stroma weight and their percentages to live body weight at sexual maturity for Cairo L-2 and LBL strains. Egg traits at 36 weeks of age including: egg number (EN), egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Egg quality; Ovarian morphology; Selection; Sexual maturity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400683

Effects of Different Selection Methods Using Body Weight on Egg Yield Parameters in Japanese Quail
Provedor de dados: 89
Autores: Baylan,M.
ABSTRACT This experiment was conducted to investigate the effects of different selection methods of parent lines on the body weight of Japanese quails. For this purpose, line M55 was subjected to individual selection for body weight at 5 weeks of age, while a reciprocal recurrent selection method was applied to lines R33 and S55. Selection lasted two generations. Body weight changes, age and weight at sexual maturity, egg weight, and egg production were investigated in the parent generations as well as in the selection lines. Body weight at 5 weeks of age of the parents of the M55, R33 and S55 lines were 299.0, 285.3, and 280.4 g in the first generation, and 314.8, 316.6, and 306.8±3.11 g in the second generation, respectively. The first generation of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Egg production; Egg weight; Japanese quail selection.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000400623

Protein, methionine+cystine and lysine levels for Japanese quails during the production phase
Provedor de dados: 89
Autores: Garcia,EA; Mendes,AA; Pizzolante,CC; Saldanha,ESPB; Moreira,J; Mori,C; Pavan,AC.
An experiment was conducted at Faculdade de Medicina Veterinária e Zootecnia/Unesp - Botucatu for 168 days to evaluate the effects of protein, Met + Cys and lysine diet levels on egg production and egg quality of laying Japanese quails. Quails with 42 days of age were reared in a completely randomized design. There were 1,944 quails distributed in four replicates of 27 birds per pen, according to a factorial 3x3x2 with three crude protein levels (16, 18 and 20% CP), three Met + Cys levels (0.700; 0.875 and 1.050%) and two lysine levels (1.100 and 1.375%). Birds fed diets with 18 and 20% CP had higher feed intake and egg production than those fed diets with 16% CP. There was significant interaction (p&lt;0.05) between protein and Met + Cys levels on egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Egg quality; Lysine; Methionine+Cystine; Protein; Quails.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2005000100002

Crude Glycerin and Energy Density of Diets for Growing, Pre-Lay and Pre-Peak Backcob Brown Egg-Laying Hens
Provedor de dados: 89
Autores: Avellaneda,Y; Ariza-Nieto,C; Afanador-Téllez,G.
ABSTRACT A total of 320 13-weeks-old pullets were weighed and randomly allocated to treatments comprised by four levels of crude glycerin (0, 3, 6 or 9%) and two levels of ME (metabolizable energy, difference of 100 kcal/kg) in the diets growing (14 to 17 weeks of age), pre-lay and pre-peak (low: 2750, 2800 and 2750 kcal/kg and high: 2850, 2900 and 2850 kcal/kg, respectively). During the study, body weight was registered until 30 weeks of age, feed intake, egg weight and egg-production for each repetition and for individual hens were measured every week. The information was analyzed through a completely randomized design with a 4x2 factorial arrangement. During the growing phase, hens that received low energy diets consumed more feed (p&lt;0.05), gained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed intake; Feed conversion; Transitional diets; Egg production.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2020000200317

Layer Performance Recovery After Feeding Amino Acid-deficient Diets
Provedor de dados: 89
Autores: Faria,DE; Harms,RH; Russell,GB.
Three hundred and twenty Hy-Line W36&lt;FONT FACE=Symbol&gt;Ò&lt;/FONT&gt; commercial laying hens, 39 weeks of age, were used to determine the sequence and the length of time needed for hens to recover performance characteristics after an eight-week period under graded levels of threonine deficiency. Eight experimental diets with Thr levels ranging from 0.35 to 0.53% were randomly fed with eight replicates of five hens each. After the previous experiment, the hens were fed a control diet (0.53% Thr) for a four-week period. Feed consumption (FC), energy intake (EI), egg production (EP), egg weight (EW), egg mass (EM), and body weight (BW) were evaluated. All performance characteristics were impaired on Thr deficient diets. The recovery sequence order was FC...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid deficiency; Egg production; Laying hens; Threonine.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2002000200007

Performance and egg quality of Japanese quails submitted to cyclic heat stress
Provedor de dados: 89
Autores: Vercese,F; Garcia,EA; Sartori,JR; Silva,A de P; Faitarone,ABG; Berto,DA; Molino,A de B; Pelícia,K.
Aiming at evaluating the influence of cyclic temperatures on the performance and egg quality of Japanese quails an experiment was carried out with 480 birds after egg production peak. Birds were housed in a bioclimatic chamber with automatic temperature control that contained two rooms, one maintained at thermoneutral temperature (21 ºC) and the other adjusted for the tested cyclic temperatures (24, 27, 30, 33 and 36 ºC at a time). Each room had a battery of five floors and ten cages, with a capacity of 24 birds per cage, totaling 240 birds per battery. Birds were fed iso-nutritious and iso-caloric diets. Data obtained under the tested cyclic temperatures were compared with those obtained under thermoneutral temperature. At the end of each experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Egg production; Environmental temperature; Heat stress; Post-peak egg production.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000100007

Grape (Vitis Vinifera) Pomace Flour as Pigment Agent of Quail Eggs
Provedor de dados: 89
Autores: Fróes,HG; Jácome,IMTD; Tavares,RA; Garcia,RG; Domingues,CHF; Bevilaqua,TMS; Martinelli,M; Naas,IA; Borille,R.
ABSTRACT The aim of the study was to evaluate the effect of dietary grape pomace flour (GPF) inclusion on the performance and egg quality of European quails (Coturnix coturnix coturnix) in lay. One hundred ninety-two (192), 42-day-old quails were distributed in a completely randomized design with four treatments (0, 2, 4 and 6% grape pomace flour inclusion) with six replicates of eight birds each. The performance parameters egg weight (g), average feed intake (g/bird), total feed intake (g/bird), egg production (%) and feed conversion ratio (kg/dozen) were evaluated, as well as egg quality traits Haugh unit, albumen weight (g), yolk weight (g), eggshell thickness (mm), egg specific gravity (g/cm3), and yolk pigmentation. There was no effect (p&gt;0.05) of...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Additives; Egg production; Egg quality; Haugh Unit; Natural pigment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100183

Productive, Qualitative, and Physiological Aspects of Layer Hens Fed with Propolis
Provedor de dados: 89
Autores: Belloni,M; Almeida Paz,ICL; Nääs,IA; Alves,MCF; Garcia,RG; Caldara,FR; Seno,LO.
ABSTRACT Laying hens reared under tropical conditions are usually under heat stress. Propolis is known for its pharmaceutical properties, such as increasing cell tolerance to hyperthermia, because of its antioxidants effects. This study aimed at evaluating the influence of different dietary propolis inclusion levels on the performance, egg quality, and bird surface temperature of layers. In this experiment 120 55-wk-old Isa Brown(r) layers were distributed according to a completely randomized experimental design into four treatments (0, 1, 2 and 3% dietary propolis inclusion levels), with three replicates of ten birds each. Performance and egg quality parameters, and birds' surface temperature were evaluated. Egg production, egg mass, feed intake, and feed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Infrared thermography; Natural diet supplement.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000400467

PRODUCTIVE PERFORMANCE OF WHITE LEGHORN HENS BASED ON THE TYPE OF HOUSING DURING REARING: FLOOR VERSUS CAGE
Provedor de dados: 89
Autores: Itza-Ortiz,MF; Peraza-Mercado,G; Castillo-Castillo,Y; Rodriguez-Alarcon,CA; Vital-Garcia,C; Jaramillo-Lopez,E; Carrera-Chavez,JM.
ABSTRACT Poultry farmers in the southeastern of Mexico consider that the productivity of the hens that comes from rearing on floor has a higher productive performance than reared hens in cages, mainly due to higher percentage of egg laying and lower mortality. The aim of this study was to evaluate the productive performance of the laying hen in relation to the type of rearing. A total of 79680 pullets Bovans White of 17 weeks of age were housed in cages with five pullets cage-1 (405 cm2pullet-1). They were divided in two treatments according to their type of rearing (floor vs cage) with four replicates. The study period was from week 20 to week 40 of age. The variables evaluated were daily (%) and cumulative mortality (%), egg production (%), egg weight...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Feed intake; Productive performance; Mortality; Egg production; Rearing method.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300543

Impact of exposure to cold on layer production
Provedor de dados: 89
Autores: Alves,FMS; Felix,GA; Almeida Paz,ICL; Nääs,IA; Souza,GM; Caldara,FR; Garcia,RG.
Infrared thermographic images were used to evaluate the effect of the exposure of layers to cold. In this trial, 540 Isa Brown® layers with an average age of 69 weeks were housed in a conventional layer house typically used in Brazil during a period of cold environmental temperatures. Environmental and heat-transference data were recorded between July 13-16, 2010. It was verified that layers under cold stress conditions lost four times more energy that the recommendations trying to maintain their body temperature. Due to their reduced feed intake capacity, hens are not capable of increasing the availability of the metabolic energy required to maintain their body temperature and egg production, consequently resulting in economic losses.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Infrared image; Housing environment; Heat exchange; Economic evaluation; Egg production.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000300010

Influence of artificial lighting on the performance and egg quality of commercial layers: a review
Provedor de dados: 89
Autores: Jácome,IMTD; Rossi,LA; Borille,R.
In Brazil, the egg production chain produces fresh eggs for the consumer market and for processing. Layers are housed in battery cage systems. Rearing and development farms are separate from egg-production farms. Considering the recent advance of Brazilian chicken egg production, scientific knowledge on management practices are required to disseminate and to consistently apply this knowledge to improve such practices. Artificial lighting is widely used in poultry reproduction, both in the production of hatchable eggs and of commercial eggs. Light is required for the release of hormones responsible for reproduction; however, the best lighting practices to stimulate laying poultry during the reproductive period still need to be determined, with the aim of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Photostimulation; Lighting programs; Sexual maturity; Egg production.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000400001

Effects of Kluyveromyces marxianus Isolated from Tibetan Mushrooms on the Plasma Lipids, Egg Cholesterol Level, Egg Quality and Intestinal Health of Laying Hens
Provedor de dados: 89
Autores: Zhong,S; Liu,H; Zhang,H; Han,T; Jia,H; Xie,Y.
ABSTRACT The effects of the Kluyveromyces marxianus M3 strain, isolated from Tibetan mushrooms, on plasma lipids, egg cholesterol level, egg quality, and intestinal health of laying hens were evaluated. In total, 160 Beijing fatty laying hens (43 weeks old) were divided into four groups and fed a basal diet supplemented with 0%, 0.1%, 0.3%, or 0.5% freeze-dried K. marxianus M3 powder for four weeks. The results showed that yeast supplementation reduced serum total cholesterol (TC), triglyceride (TG), low density lipoprotein-cholesterol (LDL-C), and very low density lipoprotein-cholesterol (VLDL-C) levels (p&lt;0.01), and increased serum high density lipoprotein-cholesterol (HDL-C) level (p&lt;0.05). Moreover, regardless of K. marxianus M3 dietary addition...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood parameters; Cholesterol; Egg production; Poultry nutrition; Serum.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000200261

Production performance and egg quality of quails (Coturnix japonica) during several periods of the day
Provedor de dados: 89
Autores: Pizzolante,CC; Faltarone,ABG; Garcia,EA; Saldanha,ESPB; Deodato,AP; Sherer,MR; Mendes,AA; Mori,C; Pelicia,K.
Three experiments were carried out to analyze the performance and egg quality of Japanese quails throughout the day when submitted to different lighting programs. In each experiment, birds were submitted to a period of 28 days for adaptation to the lighting program. During the following three days, each day - from 7 am to 7 pm or 9 pm - was divided into six or seven periods of two hours each, and the remaining hours corresponded to another single period. All birds were submitted to the same management practices, and received water and feed ad libitum. The experimental diet was formulated according to NRC (1994) standards. It was observed lower feed intake in the period of 9 pm to 7 am, and a higher incidence of lay from 3 pm to 7 pm, as opposite to hens,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Periods of lay; Egg production; Lighting programs.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000300002

Bone mineral density of tibae and femura of broiler breeders: growth, development and production
Provedor de dados: 89
Autores: Almeida Paz,ICL; Mendes,AA; Quinterio,RR; Vulcano,LC; Takahashi,SE; Garcia,RG; Komiyama,CM; Balog,A; Pelícia,K; Wescheler,FS; Scudeller,PSO; Piccinin,A.
The aim of this study was to follow-up the physiological variations in the development of the bone tissue, associating them with the egg production curve. This study was carried out in the facilities of the Faculdade de Medicina Veterinária e Zootecnia of the UNESP, Botucatu, Brazil. Twenty-three families of Ross broiler breeders were used, each family consisting of 13 females and 1 male, distributed in 23 pens of 5.0m² each. The management was that recommended by the genetic company manual (Agroceres Ross, 2003), with daily feeding until 6th week of age; and birds were fed according to a 5:2 schedule (5 days fed, 2 days of fasting) between 7 and 17 weeks of age, returning to daily feeding starting at 18 weeks of age. Birds did not receive afternoon...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone; Bone density; Broiler breeders; Egg production; Shell quality.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000200002

Dietary fiber inclusion as an alternative to Feed Fasting to induce molting in Commercial Layers
Provedor de dados: 89
Autores: Sgavioli,S; Filardi,R da S; Praes,M F F M; Domingues,C H de F; Pileggi,J; Andrade,P de C; Boleli,I C; Junqueira,O M.
The objective of the present experiment was to compare the performance, egg quality and organ morphometrics of commercial layers submitted to alternative forced molting methods using dietary fibers. The experimental period included the phases of molting, rest, and second laying cycle (six periods of 28 days each). In the trial, 320 commercial Isa Brown layers with 72 weeks of age were distributed, according to a completely randomized experimental design into five treatments with eight replicates of eight birds each, totaling 40 experimental units. Molting was induced by feeding diets with the inclusion of alfalfa or soybean husks at 80% and 60% or feed fasting. Treatments were applied for 14 days. Performance and egg quality parameters were evaluated for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alfalfa; Soybean husks; Egg production; Morphometrics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000400011

Monochromatic light-emitting diode (LED) source in layers hens during the second production cycle
Provedor de dados: 91
Autores: Borille,Rodrigo; Garcia,Rodrigo G.; Nääs,Irenilza A.; Caldara,Fabiana R.; Santana,Mayara R.
ABSTRACTLight is an important environmental factor for birds, allowing not only their vision, but also influencing their physiological responses, such as behavioral and reproductive activity. The objective of this experiment was to evaluate the impact of different colors of monochromatic light (LED) sources in laying hens production during the second laying cycle. The study was conducted in an experimental laying house during 70 days. A total of 300 laying hens Isa Brown® genetic strain, aged 95 weeks, in the second laying cycle were used in the study. The artificial light sources used were blue, yellow, green, red and white. The light regimen was continuous illumination of 17 h per day (12 h natural and 5 h artificial) in a daily light regimen of 17L:5D...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial lighting; Egg production; Color of light source.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015000900877

Nutritional requirements of digestible methionine + cystine for Japanese quails in production phase
Provedor de dados: 96
Autores: Costa,Fernando Guilherme Perazzo; Rodrigues,Valéria Pereira; Goulart,Cláudia de Castro; Vargas Junior,José Geraldo; Silva,José Humberto Vilar da; Souza,Janete Gouveia de.
This experiment was carried with Japanese quails in the egg production phase with the objective of determining the requirements of digestible methionine + cystine (M+C) for higher production and egg quality. A total of 240 Japanese quails were distributed in a randomized complete block design. The basal diet was supplemented with different DL-methionine levels, corresponding to digestible methionine + cystine levels of 0.55, 0.61, 0.67, 0.73 and 0.79%. The characteristics analyzed were feed intake (g/quail/day), egg production (%), egg weight (g), egg mass (g/quail/day), feed conversion (dozen eggs/egg mass and kg feed/dozen eggs), egg shell (% and g), albumen (% and g), yolk (% and g) and specific gravity (g/cm³). The digestible M+C level for Japanese...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Egg quality; Sulfur amino acids.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009001200014

Ideal digestible isoleucine: digestible lysine ratio in diets for laying hens aged 24-40 weeks
Provedor de dados: 96
Autores: Rocha,Tatiana Cristina da; Donzele,Juarez Lopes; Gomes,Paulo Cezar; Mello,Heloisa Helena de Carvalho; Troni,Allan Reis; Viana,Gabriel da Silva.
Two hundred fifty-two Hy-Line W36 laying hens were allotted in a randomized block design with 6 treatments, 7 replicates and 6 hens per experimental unit in order to determine the ideal digestible isoleucine: digestible lysine (Ile:Lys) ratio for laying hens aged 24-40 weeks. Experimental diets contained 5.92, 6.33, 6.73, 7.14, 7.54 and 7.95 g/kg of digestible isoleucine, resulting in different Ile:Lys ratios (0.73:1, 0.78:1, 0.83:1, 0.88:1, 0.93:1 and 0.98:1). Experimental diets were isonitrogenous, with different dietary contents of glutamic acid, and made isocaloric by adjusting the levels of cornstarch. All essential amino acids were provided proportionally to digestible lysine. Feed intake, egg production, egg weight, egg mass, feed conversion ratio...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestible amino acid; Egg mass; Egg production; Protein.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001100003

Digestible threonine to lysine ratio in diets for laying hens aged 24-40 weeks
Provedor de dados: 96
Autores: Rocha,Tatiana Cristina da; Gomes,Paulo Cezar; Donzele,Juarez Lopes; Rostagno,Horacio Santiago; Mello,Heloisa Helena de Carvalho; Ribeiro,Cleverson Luís Nascimento; Troni,Allan Reis.
Two-hundred sixteen white laying hens were used to assess the ideal ratio of digestible threonine:lysine in diets for laying hens at 24 to 40 weeks of age. Birds were assigned to a randomized block design, with six treatments, six replicates per treatment and six birds per experimental unit. The cage was used as the blocking criterion. Experimental diets contained different digestible threonine:digestible lysine ratios (65, 70, 75, 80, 85 and 90%) with 142 g/kg of crude protein. Experimental diets were formulated to be isonitrogenous and isocaloric with different contents of L-glutamic acid. Feed intake (g/hen/d), egg production (%), egg weight (g), egg mass (g/hen/d), feed conversion ratio (kg/dozen and kg/kg egg), eggshell weight (g), albumen weight (g),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Egg production; Ideal protein; White laying hens.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013001200007

Digestible tryptophan:lysine ratio for laying hens
Provedor de dados: 96
Autores: Lima,Matheus Ramalho de; Costa,Fernando Guilherme Perazzo; Guerra,Ricardo Romão; Silva,José Humberto Vilar da; Rabello,Carlos Bôa-Viagem; Miglino,Maria Angelica; Nogueira,Eduardo Terra; Pinheiro,Sarah Gomes.
The objective of this study was to evaluate the requirement of digestible tryptophan for white laying hens in the production stage fed diets of different digestible tryptophan:digestible lysine ratios, as well as animal performance and histological alterations in their reproductive and digestive systems. A total of 280 white laying hens at 29 weeks of age were distributed in a completely randomized design with five treatments and seven replications with eight birds in each. The treatments consisted of a base feed, formulated with corn, soybean meal and corn gluten meal, and supplemented with the synthetic amino acids L-lysine, DL-methionine, L-threonine, L-isoleucine, L-arginine, and L-valine, so as to meet the nutritional requirements for laying hens,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Histological effects; Poultry industry.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000010

Digestible lysine levels in diets for laying Japanese quails
Provedor de dados: 96
Autores: Ribeiro,Cleverson Luís Nascimento; Barreto,Sergio Luiz de Toledo; Reis,Renata de Souza; Muniz,Jorge Cunha Lima; Donzele,Juarez Lopes; Gomes,Paulo Cezar; Vargas Júnior,José Geraldo de; Albino,Luiz Fernando Teixeira.
The objective of this study was to estimate the digestible lysine requirement of Japanese quails in the egg-laying phase. A total of 336 female Japanese quails (Coturnix coturnix japonica) of average initial age of 207 days were distributed in a completely randomized experimental design, composed of 6 treatments (lysine levels) with 7 replicates and 8 birds per experimental unit, with duration of 84 days. Experimental diets were formulated from a basal diet, with corn and soybean meal, with 2.800 kcal ME/kg and 203.70 g/kg crude protein, showing levels of 9.50; 10.00; 10.50; 11.00; 11.50; and 12.00 g/kg digestible lysine; diets remained isoprotein and isocaloric. The following variables were studied: feed intake (FI); lysine intake (LI); egg production per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Digestible amino acids; Egg production; Performance variables.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000700005

Effects of photoperiod on reproduction of Siamese fighting fish Betta splendens
Provedor de dados: 96
Autores: Giannecchini,Luiz Gustavo; Massago,Haluko; Fernandes,João Batista Kochenborger.
This study investigated the effect of different photoperiods (24 h of light (L):0 h of darkness (D); 20L:4D; 16L:8D; 12L:12D; and 8L:16D) on the reproduction and growth of Betta splendens. The results showed that spawning frequency was significantly higher in couples reared under 16L:8D and 12L:12D, in comparison with other treatments. The highest number of eggs per spawn was obtained under 16L:8D (544.76±375.23) and 12L:12D (471.13±261.52), and the lowest values were detected for 24L:0D (128.55±58.14) and 20L:4D (187.87±103.84). Fertility and fecundity also showed significantly higher average values in 16L:8D and 12L:12D when compared with 24L:0D and 20L:4D treatments. Egg volume and perivitelline space were significantly higher in 24L:0D treatments that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Fertility; Light regimen; Ornamental fish.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400001

Prediction equations to estimate the demand of energy and crude protein for maintenance, gain and egg production for laying Japanese quails
Provedor de dados: 96
Autores: Jordão Filho,José; Silva,José Humberto Vilar da; Costa,Fernando Guilherme Perazzo; Sakomura,Nilva Kazue; Silva,Cidinei Trajano; Chagas,Nalberlania Alves.
The study was conducted to estimate requirements of energy and crude protein for maintenance, weight gain and egg production of Japanese quails in the period of 67 to 107 days of age. Two experiments were performed: one, to determine the requirements for maintenance of protein, and the other, for energy. Experiments were conducted in a completely randomized design with four dietary levels of offer and four replicates of six birds. The diets offered were: ad libitum (100%), 75%, 50%, and 25% consumption ad libitum (below maintenance). The methodology used to estimate the demand for maintenance was the comparative slaughter. For estimation of the requirement for weight gain, eight groups of 15 quails were reared separately, fed ad libitum and housed under 22...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Energy; Modeling; Protein.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100020

Metabolizable energy and oil intake in brown commercial layers
Provedor de dados: 96
Autores: Silva,Amadeu Benedito Piozzi da; Garcia,Edivaldo Antonio; Molino,Andréa de Britto; Silva,Elyara Maria Pereira da.
With the objective to establish the best metabolizable energy (ME) intake for layers, and the best dietary vegetable oil addition level to optimize egg production, an experiment was carried out with 432 30-week-old Hisex Brown layers. Birds were distributed into nine treatments with six replicates of eight birds each according to a 3 × 3 factorial arrangement, consisting of three daily metabolizable energy intake (280, 300 or 320 kcal/bird/day) and three oil levels (0.00; 0.75 and 1.50 g/bird/day). Daily feed intake was limited to 115, 110 and 105 g/bird in order to obtain the desired energy and oil intake in each treatment. The following parameters were evaluated: initial weight, final weight, body weight change, egg production, egg mass, feed conversion...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight change; Egg production; Lay percentage; Layer nutrition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001000014

Relationship of methionine plus cystine with lysine in diets for laying Japanese quails
Provedor de dados: 96
Autores: Reis,Renata de Souza; Barreto,Sergio Luiz de Toledo; Gomes,Paulo Cezar; Lima,Heder José D'Avila; Medina,Paola Monteiro; Ferreira,Fabiana.
The objective of this work was to evaluate the relationships of methionine plus cystine with lysine for Japanese quails in the laying phase. Thus, it was used 480 birds at initial age of 65 days, distributed in randomized block design with 6 treatments, 10 replicates and 8 birds per experimental unit. The treatments consisted of basal diet deficient in methionine plus cystine (0.65%), with 19.6% of crude protein and 2800 kcal of metabolizable energy/kg of ration, supplemented with six levels of DL-methionine 98% (0.116; 0.167; 0.218; 0.269; 0.320 and 0.371%), corresponding to methionine plus cystine with lysine ratio of 0.65, 0.70, 0.75, 0.80, 0.85 and 0.90, and the digestible lysine set at a suboptimal level of 1.00. The parameters studied were: feed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coturnix coturnix japonica; Digestible amino acid; Egg production; Ideal protein; Performance.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500014

Feed type for induced molting of commercial layer hens
Provedor de dados: 96
Autores: Santos,Graciene Conceição dos; Garcia,Edivaldo Antônio; Vieira Filho,Javer Alves; Molino,Andréa de Britto; Pelícia,Kleber; Berto,Daniella Aparecida; Murakami,Elise Saori Floriano; Montenegro,Andressa Takahara.
An experiment employing three hundred and twenty 81-week-old Lohmann LSL commercial-breed hens was conducted to compare alternative induced-molting methods with the conventional method (fasting). Induced molting lasted 28 days at most, production and quality being monitored for four periods of 28 days thereafter. A completely randomized experimental design with five treatments, eight replicates of eight birds each per plot was adopted. The following experimental treatments were applied until a loss of 26% of body weight was reached: T1 - fasting, T2 - wheat bran ad libitum, T3 - rice bran ad libitum, T4 - cracked rice ad libitum, T5 - ground alfalfa ad libitum. Birds were then fed production diet ad libitum, except for those on treatment T1 (fasting) which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cracked rice; Egg production; Ground alfalfa; Rice bran; Wheat bran.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300007

Nutritional potassium requirement for laying Japanese quails
Provedor de dados: 96
Autores: Costa,Fernando Guilherme Perazzo; Rodrigues,Ladyanne Raia; Goulart,Cláudia de Castro; Oliveira,Cleber Franklin Santos de; Rodrigues,Valéria Pereira; Silva,José Humberto Vilar da.
The objective of this study was to evaluate the potassium requirement for laying Japanese quails. Two hundred and forty quails were distributed in a randomized block design, with five treatments and six replicates, with eight birds each. The treatments consisted of a basal diet deficient in potassium (K) (2.50 g/kg), supplemented with potassium carbonate, to replace the inert, to reach levels of 2.50, 3.50, 4.50, 5.50 and 6.50 (g/kg) of K in the diet. There was a quadratic effect of K levels on feed intake, egg production, egg mass and feed conversion per egg mass and per egg dozen, estimating the requirements of 4.26, 4.41, 4.38, 4.43 and 4.48 (g/kg) of K diet, respectively. There was no significant effect on the levels of K in the diet on egg weight,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Electrolyte balance; Mineral.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200020

การประเมินพันธุกรรมและกราฟพันธุกรรมของการให้ผลผลิตไข่ในไก่พื้นเมืองไทย (ประดู่หางดำ) โดยใช้โมเดลวันทดสอบรีเกรซชั่นสุ่ม
Provedor de dados: 106
Autores: Wuttigrai Boonkum; Monchai Duangjinda; Banyat Laopaiboon; Thevin Vongpralub.
Objective of this research was to investigate an appropriate random regression test-day model from various egg production functions for genetic evaluation and genetic curve construction for egg production in the first generation (G1) of Thai native chickens (Pradu Hang Dam). Data included 1,669 monthly egg production records of 203 Thai native chickens between September, 2007 and June, 2009. Data were obtained from the Research and Development Network Center for Animal Breeding (Native Chicken), Faculty of Agriculture, Khon Kaen University. An average (+SD) of yearly egg production was 140+36 eggs and average (+SD) age at first egg was 187+22 days. Considering to -2logL, AIC, and MSE, random regression test-day model with egg function of Koops and Grossman...
Tipo: Collection
Palavras-chave: Egg production; Genetic evaluation; Thai native chicken; Random regression test-day model; Pradu Hang Dam; ไก่; พันธุ์พื้นเมืองไทย; พันธุ์ประดู่หางดำ; พันธุกรรม; โมเดลวันทดสอบรีเกรซชั่นสุ่ม; ผลผลิตไข่; กราฟพันธุกรรม.
Ano: 2012
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5162

Calcium in pre-laying and laying rations on the performance and quality of laying hens’ eggshell - doi: 10.4025/actascianimsci.v35i2.16555
Provedor de dados: 2
Autores: Rodrigues, Eliana Aparecida; Instituto Federal do Triangulo Mineiro; Oliveira, Maria Cristina de; Universidade de Rio Verde; Cancherini, Luciana Cardoso; Universidade do Estado de Mato Grosso; Duarte, Karina Ferreira; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Santana, Luis Fernando; Instituto Federal do Triangulo Mineiro; Junqueira, Otto Mack; Universidade Estadual Paulista “Júlio de Mesquita Filho.
The experiment evaluated the effect of different calcium (Ca) levels in pre-laying and laying diets on the performance and egg quality of laying hens. Two hundred and fifty-six 16-week-old Brown Hisex pullets were housed in a conventional shed. The experiment had a completely randomized design with 4 x 2 factorial arrangement (four calcium levels - 0.8, 1.3, 1.8 and 2.3% in pre-laying phase; two calcium levels - 2.5 and 3.5% in laying phase), totaling eight treatments with four repetitions of eight birds per experimental unit. The experiment started with 16-week-old hens receiving pre-laying diets provided until they were 18 weeks old. At this period, the laying diets started. Four 28-day cycles were evaluated for the following variables: production and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.00.00-2 e 5.04.03.00-1 egg mass; Egg production; Eggshell quality; Feed intake; Pullets egg mass; Egg production; Eggshell quality; Feed intake; Pullets.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16555

Productivity of japanese quails in relation to body weight at the end of the rearing phase
Provedor de dados: 2
Autores: Vieira Filho, Javer Alves; Garcia, Edivaldo Antônio; Molino, Andréa de Britto; Santos, Tiago Atônio dos; Almeida Paz, Ibiara Correia de Lima; Baldo, Grace Alessandra de Araújo.
Two experiments were conducted at different times with the objective of investigating how the body weight of Japanese quails at the end of the rearing period may alter the performance during the laying phase. In both experiments, the birds were distributed in five treatments according to their body weights, which were obtained at 42 and 35 days of age for the first and second experiments respectively, and the following categories were considered for said experiments: very light, light, average, heavy and very heavy. For both experiments, the treatments were distributed in a randomized block design, at eight repetitions per treatment for the first one and six for the second one, both at 18 birds per repetition. During the first experiment, sexual maturity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body development; Egg production; Quail production; Sexual maturity.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/29858

Níveis de lisina e treonina digestíveis para poedeiras comerciais Lohmann LSL de 24 a 44 semanas de idade - DOI: 10.4025/actascianimsci.v31i1.1387
Provedor de dados: 2
Autores: Matos, Maira Silva; UFG; Leandro, Nadja Susana Mogyca; UFG; Stringhini, José Henrique; UFG; Café, Marcos Barcellos; UFG; Carvalho, Fabyola Barros de; UFG; Gomes, Natali Almeida; UFG.
Objetivou-se avaliar o desempenho (25 a 44 semanas de idade) e o balanço de nitrogênio de poedeiras comerciais alimentadas com rações contendo níveis de lisina digestível (0,700; 0,800 e 0,900%) combinados com os de treonina (0,500; 0,550 e 0,600%). O delineamento experimental foi inteiramente ao acaso em esquema fatorial 3x3 (níveis de lisina x de treonina), com cinco repetições de oito aves cada. Os dados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey. Observou-se aumento na ingestão de lisina e de treonina (p &lt; 0,05) com o acréscimo desses aminoácidos na ração. Os níveis de lisina e treonina não influenciaram a produção de ovos (p &gt; 0,05), no entanto, o peso do ovo piorou com a inclusão de 0,550% de treonina...
Palavras-chave: 5.04.00.00-2 Zootecnia aminoácido digestível; Poedeira leve; Produção de ovos Tem experiência na área de Zootecnia  com ênfase em Nutrição e Alimentação Animal de monogástricos. digestible amino acids; Laying hen; Egg production.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1387

Diet influence on egg production of the copepod Acartia tonsa (Dana, 1896)
Provedor de dados: 42
Autores: Teixeira,Priscila F.; Kaminski,Sonia M.; Avila,Tatiana R.; Cardozo,Alessandro P.; Bersano,José G.F.; Bianchini,Adalto.
Egg production in the copepod Acartia tonsa was evaluated using different densities of the microalgae Thalassiosira weissflogii, Chaetoceros muelleri and Isochrysis galbana. Male and female were kept under controlled conditions (salinity 30, 20°C, photoperiod 12L:12D), acclimated to the experimental conditions and left over a period of 24 h to allow copulation. Algal densities tested were equivalent in biovolume and corresponded to 0, 2.5, 5, 10, 20, 40 and 60.10³ cells.mL-1 of T weissflogii. Ten acclimated female were separated, transferred to glass bottles and exposed for further 24 h to the corresponding experimental medium. After this period, the eggs were fixed and counted. Copepod egg production reached a threshold value when T weissflogii, C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Acartia tonsa; Microalgae.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200009

Effects of heat stress on some blood parameters and egg production of Shika Brown layer chickens transported by road
Provedor de dados: 48
Autores: Ajakaiye,Joachim J; Ayo,Joseph O; Ojo,Sunday A.
The effects of vitamins C and E on layer chickens transported by road for 6 h during the hot dry season were investigated. Two experimental groups consisting of thirty Shika Brown layers were separately administered vitamins C and E orally just before transportation, while another 30 layers, which were only given sterile water, served as control. Blood samples analyzed before and after transportation in the control layers showed a decrease (p&lt;0.05) in total white blood cell, (p&lt;0.01) lymphocyte and monocyte values, and a signifcant (p&lt;0.05) and (p&lt;0.001) increase in the values of eosinophils and heterophils post-transportation, respectively. In the experimental groups, post-transportation values of total white blood cells, eosinophils and...
Tipo: Journal article
Palavras-chave: Egg production; Heat and transport stress; Layer chickens; Leukocyte profle; Vitamins C and E.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602010000200006

The inclusión of distiller&amp;#8217;s dried com grains with solubles in the feed of laying hens during the production stage
Provedor de dados: 118
Autores: Rodríguez-Ríos,Hernán E; Campos-Parra,Jorge A; Williams-Salinas,Pamela A; Blanck-Heimann,Markus H; Astudillo-Neira,Rita G; Grande-Cano,Jesús D.
H.E. Rodríguez-Ríos, J.A. Campos-Parra, P.A. Williams-Salinas, M.H. Blanck-Heimann, R.G. Astudillo-Neira, and J.D. Grande-Cano. 2015. The inclusion of distiller&amp;#8217;s dried corn grains with solubles in the feed of laying hens during the production stage. Cien. Inv. Agr. 42(3): 331-339. The aim of this study was to assess the effects of distiller&amp;#8217;s dried corn grains with solubles (DDGS) in the diet of laying hens on their productive parameters (live weight, laying percentage, and feed intake) and egg quality (egg weight, mass, yolk color and shell thickness). This study was conducted in the Andes Mountains in Parral, Chile. It covered a span of 13 weeks of productive egg laying, ranging from the 31st to the 44th week of life of the hens. The...
Tipo: Journal article
Palavras-chave: Egg production; Hy-Line Brown; Soybean bran.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000300002

Inclusion of canthaxanthin and 25-hydroxycholecalciferol in the diet of broiler breeders on performance and incubation parameters
Provedor de dados: 65
Autores: Duarte,Vinicius; Minafra,Cibele Silva; Santos,Fabiana Ramos dos; Perim,Francisco dos Santos.
The objective of this experiment was to evaluate the effects of a diet containing canthaxanthin and 25-hydroxycholecalciferol (25-OH-D3) on the production and reproductive performances of Cobb 500 broiler breeders aged 53 to 61 weeks. The study included 36,000 Cobb 500 female and 3,600 male broiler breeders aging 51 weeks. The birds were housed in three poultry houses divided into four plots, totaling 12 experimental units each containing 3,000 females and 300 males. The birds received the following treatments: control diet (without the studied additives) or the control diet with the addition of 60mg kg-1feed of 25-(OH)-D3 and canthaxanthin feed (6mg of canthaxanthin and 2,760,000IU of 25-(OH)-D3 per kg of feed) per the supplier's recommendations. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carotenoids; Vitamin D; Broiler breeders; Hatching; Egg production.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102050

Canonical correlation analysis applied to production and reproduction traits of meat type quails
Provedor de dados: 65
Autores: Ribeiro,Jeferson Corrêa; Silva,Luciano Pinheiro da; Caetano,Giovani da Costa; Crispim,Aline Camporez; Pacheco,Rodrigo de Oliveira; Torres,Robledo de Almeida.
ABSTRACT: Data from 629 meat type quails were used to study association between two different sets of traits: egg production and reproduction. Traits related to reproduction were: body weight at 42 days (W42), average egg weight (AEW), age at sexual maturity (ASM); and production traits: number of eggs produced from 42 until 182th day considering intervals of 35 days each period (P1, P2, P3 and P4). Canonical correlations were used to describe the association between these two sets of traits. The canonical coefficients indicated that egg production and reproductive traits were moderately related (0.3475). The first partial period of production (P1) and age at sexual maturity were the most relevant traits among the analyzed variables. Results show that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal breeding; Canonical pairs; Coturnix coturnix; Egg production; Multivariate analysis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000701289