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Littérature scientifique sur le sujet « Broilers »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 9 mars 2023

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Articles de revues sur le sujet "Broilers"

Xiong, Xingguo, Mingzhou Lu, Weizhong Yang, Guanghui Duan, Qingyan Yuan, Mingxia Shen, Tomas Norton et Daniel Berckmans. « An Automatic Head Surface Temperature Extraction Method for Top-View Thermal Image with Individual Broiler ». Sensors 19, n^o 23 (30 novembre 2019) : 5286. http://dx.doi.org/10.3390/s19235286.

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Surface temperature variation in a broiler’s head can be used as an indicator of its health status. Surface temperatures in the existing thermograph based animal health assessment studies were mostly obtained manually. 2185 thermal images, each of which had an individual broiler, were captured from 20 broilers. Where 15 broilers served as the experimental group, they were injected with 0.1mL of pasteurella inoculum. The rest, 5 broilers, served as the control group. An algorithm was developed to extract head surface temperature automatically from the top-view broiler thermal image. Adaptive K-means clustering and ellipse fitting were applied to locate the broiler’s head region. The maximum temperature inside the head region was extracted as the head surface temperature. The developed algorithm was tested in Matlab® (R2016a) and the testing results indicated that the head region in 92.77% of the broiler thermal images could be located correctly. The maximum error of the extracted head surface temperatures was not greater than 0.1 °C. Different trend features were observed in the smoothed head surface temperature time series of the broilers in experimental and control groups. Head surface temperature extracted by the presented algorithm lays a foundation for the development of an automatic system for febrile broiler identification.

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Tarkhan, Amneh H., Khaled M. M. Saleh et Mohammad Borhan Al-Zghoul. « HSF3 and Hsp70 Expression during Post-Hatch Cold Stress in Broiler Chickens Subjected to Embryonic Thermal Manipulation ». Veterinary Sciences 7, n^o 2 (22 avril 2020) : 49. http://dx.doi.org/10.3390/vetsci7020049.

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Decades of selective breeding for commercial purposes have rendered the broiler chicken (Gallus gallus domesticus) highly susceptible to heat and cold stress. A multitude of studies have documented the effects of thermal manipulation (TM) on broiler thermotolerance during periods of post-hatch heat stress, but very few have focused on the effect of TM on a broiler’s ability to withstand cold stress. Therefore, the primary objective of the current study is to determine the effects of TM on the acquisition of thermotolerance in broilers via their expression of the stress-associated 70 kilodalton heat shock protein (Hsp70) gene and heat shock factor 3 (HSF3) gene. Briefly, Hubbard broiler embryos were subject to TM by increasing the incubation temperature to 39 °C and 65% relative humidity (RH) for 18 h daily, from embryonic days (ED) 10 to 18. Broilers were then exposed to cold stress by decreasing the room temperature to 16 °C during post-hatch days 32 to 37. After thermal challenge, broilers were euthanized and hepatic and splenic tissues were collected. Our results showed that TM decreased the hatchability rate and body temperature but improved the body weight gain. TM generally decreased the hepatic expression but did not change the splenic expression of HSF3 during cold stress. In contrast, both hepatic and splenic Hsp70 expression decreased during cold stress. The results of the present study may suggest that TM significantly affects a broiler’s genetic response to cold stress.

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Surya Atmaja, I. Putu, I. Ketut Satriawan et I. Wayan Gede Sedana Yoga. « SISTEM DINAMIS KETERSEDIAAN DAGING AYAM RAS PEDAGING (BROILER) DI PROVINSI BALI ». JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI 7, n^o 2 (23 mai 2019) : 229. http://dx.doi.org/10.24843/jrma.2019.v07.i02.p07.

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The demand of broilers meats in Bali Province are very high and more dominated from hotels, restaurants, cafes and industrial. The aims of this research are to establish the factors those influenced the availability broiler meat, to arrange dynamic system modeling broiler meat availability, calculate the availability policy for fulfilling the need of animal protein, to arrange alternative recommendation of scenario policy for fulfilling the demand of broiler meat in Bali Province. Simulation are conducted over a period of 10 years, starting from 2012 until 2021. The factors those influenced the availability broiler meat in Bali Province are broiler meat production and broiler meat requirements. The simulation result showed that the production of broilers meat in Bali Province did not afforded to fulfil the demands of broilers since 2012. The avaibilty of broilers in Bali Province mostly appointed the reduction from the bigining to the end of the simulation year. According to the simulation result several scenarios, the policy which was very effective and possible to be developed for fulfilling the demand of broilers meat is by adding the weight of broilers during the livestock and also by adding more chicken. Key words: system dynamics, availability, broiler meat, simulations

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Kamaludin, Kamaludin, P. W. Dzikrillah, M. F. Azhoheru, Suhendrian Suhendrian, W. Hardiansyah, D. D. Putri et G. G. Maradon. « Manajemen usaha Ayam Pedaging Jantan dan Betina dengan Penambahan Suplemen Organik Cair ». PETERPAN (Jurnal Peternakan Terapan) 1 (26 décembre 2019) : 21–25. http://dx.doi.org/10.25181/peterpan.v1i1.1476.

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This study aims to determine the growth of broiler chickens and analyze the feasibility of broiler farming with the addition of liquid organic supplements. Liquid organic supplements (SOC) or also called probiotics contain Lactobacillus sp, Azetobacter sp, Basiluss sp, vitamins, and minerals. SOC can increase antibodies, reduce stress levels, suppress the onset of disease, help stimulate appetite, and accelerate the growth of broiler chicken. Broilers are divided into 4 treatments female broilers without SOC, male broilers without SOC, female broilers with the addition of SOC, and treatment of male broilers with the addition of SOC. Based on the results and discussion the highest PBB is obtained by male chicken with SOC. Feasibility analysis shows that all treatments are feasible, B/C (3.11) and R/C (3.18) values of treatments added by SOC are higher than treatments without SOC.Keywords: Broiler, Feasibility Analysis, SOC

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Çavuşoğlu, Enver, et Metin Petek. « Effects of different floor materials on the welfare and behaviour of slow- and fast-growing broilers ». Archives Animal Breeding 62, n^o 1 (14 juin 2019) : 335–44. http://dx.doi.org/10.5194/aab-62-335-2019.

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Abstract. Litter quality and fast growth rate are the two main issues in broiler welfare. This study aimed to evaluate the effects of genotype and floor material on broiler welfare and behaviour. In the study, slow-growing (Hubbard JA57) and fast-growing (Ross 308) broilers on a slatted floor and deep litter were used; there were four main groups (2 genotype × 2 housing) and each treatment group consisted of 5 replicates. Each replicate group consisted of 10 male chicks, and 200 birds were used in total. The experiment lasted for 8 weeks. The welfare parameters were recorded in weeks 6, 7, and 8, whereas behaviour data were collected in week 8 only. Results showed that welfare parameters of broiler chickens were affected by genotype and floor type. Slow-growing broilers had better welfare parameters than fast-growing broilers. The slatted floor had a positive effect on main welfare parameters of the birds. Slower-growing broilers had a longer distance in the avoidance distance test. Tonic immobility reaction was longer in slow-growing broilers compared to fast-growing broiler. On the other hand, floor type did not affect behaviour parameters. As a conclusion, slow-growing broilers had better welfare parameters than fast-growing broilers and slat flooring could be beneficial to improve broiler welfare, but further behavioural investigations are needed such as dust bathing and walking behaviour.

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Tahamtani, Fernanda M., Lena K. Hinrichsen et Anja B. Riber. « Welfare assessment of conventional and organic broilers in Denmark, with emphasis on leg health ». Veterinary Record 183, n^o 6 (30 mai 2018) : 192. http://dx.doi.org/10.1136/vr.104817.

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The aim of this study was to survey and report the walking ability in broilers housed in both conventional and organic production systems in Denmark. To this end, the authors assessed the walking ability, by using the Bristol scale, in 31 conventional broiler flocks and in 29 organic broiler flocks distributed across Denmark. In addition, assessment of contact dermatitis, leg abnormalities, scratches and plumage cleanliness, as well as postmortem analysis of tibial dyschondroplasia, was performed in conventional broilers. The survey found a prevalence of 77.4 per cent of impaired walking ability (gait score (GS) >0) in conventional broilers and 38.1 per cent in organic broilers. The prevalence of severe lameness (GS >2) was 5.5 per cent and 2.5 per cent for conventional and organic broilers, respectively. The prevalence of tibial dyschondroplasia in conventional broilers was 4.7 per cent. The results on other welfare indicators are also presented for conventional broilers. The results from the present and previous surveys indicate that the prevalence of impaired walking ability in broiler chickens in the Danish conventional production system is high, but the severity has been steadily decreasing over the last 19 years. Furthermore, the results from the survey of organic broilers suggest that lameness is less prevalent and severe in this system relative to conventional production.

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Elkomy, Ashraf, Mohamed Aboubakr, Elsayed Emam et Mohammed Kassem. « Studies on the effects of cephradine and colibacellosis on immunological status of broiler chicken vaccinated with newcastle virus vaccine ». International Journal of Pharmacology and Toxicology 7, n^o 2 (22 juillet 2019) : 17. http://dx.doi.org/10.14419/ijpt.v7i2.29020.

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The present study was carried out using 100, one-day old broiler chicks to evaluate the immunological status of broiler chicks vaccinated with Newcastle virus vaccine and infected with E coli and treated by cephradinee.At day 15th of age, broilers chicks were divided into 4 equal groups (25 chicks in each). 1st group, healthy non infected non treated broilers (control group). 2nd, 3rd and 4th groups expermintally infected with E. coli was done at 15th day of age. 2nd group infected, non treated broilers, 3rd group infected broilers and vaccinated with Newcastle disease virus vaccine, 4th group infected broilers vaccinated with Newcastle vaccine and received 20 mg/kg b.wtcephradinee in drinking water daily for 5 consecutive days. At 1st, 10th and 20th day post administration, blood samples were collected for determination cellular and humeral immune response. Infected broilers with E coli only or infected broilers and vaccinated display significant increase in leukocyte, heterophils, phagocytic activity, phagocytic index, killing percentage, nitric oxide, lysozyme activity and gamma globulin. Beside significant decrease in lymphocyte, serum total protein, albumin, total globulin, A/G ratio and HI titer coupled with insignificant decrease in esinophils, basophils and monocyte, beta globulin associated with insignificant increase in alpha globulin allover experimental period post vaccination when compared with control broilers. Vaccinated-Infected broilers that received 20 mg/kg b.wtcephradine daily for five consecutive days revealed significant increase in leukocyte, heterophils, phagocytic activity, phagocytic index, killing % and gamma globulin at 1st day post treatment coupled with insignificant increase at 10th and 20th day post treatment. In-addition to significant decrease in serum total protein, albumin, total globulin A/G ratio and HI associated with non significant decrease in esinophils, basophils, monocyte,beta globulin and non significant increase in nitric oxide, lysozyme activity and alpha globulin allover the experiment when compared with control broilers. It could be concluded that, colibacillosis in broiler chickens and cephradine induced some adverse effects on immunological status of broiler chickens. Therefore, it’s important not vaccinated broiler during colibacelosis or using cephradine in treatment.

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Zhao, Zhonghao, Xiuguo Zou, Zhengling Yin, Zhibin Cao, Jie Zhang, Chenyang Wang, Wenchao Liu et Yungang Bai. « Research on the Correlation between Breeding Environment and Activity of Yellow Feather Broilers Based on the Multichromatic Aberration Model ». Computational Intelligence and Neuroscience 2021 (14 septembre 2021) : 1–10. http://dx.doi.org/10.1155/2021/2897879.

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Broiler behavior is closely related to the breeding environment. Therefore, studying broiler behavior helps breeding farm workers to better carry out welfare breeding. In the breeding environment of yellow feather broilers, temperature, humidity, and ammonia concentration are the main factors that affect the behavior of the broilers. This study used a multichromatic aberration model to process the color images of yellow feather broilers to extract the activity feature of the broilers at different periods, utilized the Cb component of YCbCr color model and the b component of Lab color model to remove background litter in images, and employed the Q component of YIQ color model to remove the feeders and the drinkers from the image. The segmented images were constructed into an accumulator to generate a heat map of yellow feather broilers’ activity. Then, the correlation between the activity and the temperature and humidity index (THI) and the correlation between the activity and ammonia concentration were explored. The experiment found that the activity of the broilers was significantly positively correlated with ammonia concentration ( P < 0.05 ), indicating that the activity of yellow feather broilers increased with ammonia concentration ascending. Besides, the THI in the broiler chamber had a significant positive correlation with the ammonia data ( P < 0.01 ), indicating that when the THI in the broiler chamber increases, the ammonia concentration rises. The research provides a direction for exploring the impact of THI and ammonia concentration on the performance of yellow feather broilers. At the same time, it provides a theoretical basis for the early warning and judgment of broiler breeding by farm workers in the future.

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Simarmata, Lasmaria, R. E. M. F. Osak, E. K. M. Endoh et F. N. S. Oroh. « ANALISIS PREFERENSI KONSUMEN DALAM MEMBELI DAGING BROILER DI PASAR TRADISIONAL KOTA MANADO (STUDI KASUS “PASAR PINASUNGKULAN KAROMBASAN”) ». ZOOTEC 39, n^o 2 (13 juillet 2019) : 194. http://dx.doi.org/10.35792/zot.39.2.2019.24427.

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ABSTRACT ANALYSIS OF CONSUMER BUYING PREFERENCES IN BROILER MEAT AT TRADITIONAL MARKET IN MANADO CITY (CASE STUDY OF THE "PINASUNGKULAN KAROMBASAN MARKET"). The goals of this study was to analyze consumer preference and attitude on attribute variation of broilers at the traditional market in Manado. Study was conducted at the Pinasungkulan market, Karombasan Manado on February 2019. Survey method was used by deep interview supported by questionnaire. Samples were defined by accidental sampling method involving fifty respondents. The primer and secondary data were used in this study and analyzed by Chi-Square and Multi attribute Fishbein analysis. The Chi-Square analysis indicated that all attributes studied were significantly different. This was meaning that there were differences of consumers preference on broilers. On the basis of Multi attribute Fishbein analysis indicated that all broiler attribute were considered by consumers in making decision of buying broilers. Broilers were became consumer preference significantly at the Pinasungkulan Market, meaning that there was difference of consumer preference on broiler attributes. Sequences of broiler attribute from the highest consideration to the lowest consideration were meat color, skin color, meat smell, skin tenderness and meat weight. Consumer attitude on broiler meat attributed in decision of buying meat of broilers was broiler meat color. Keywords: Broiler, consumer preference

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Zekeri, Okpanachi Joseph, Okpe, Alfa Ameh, Ejiwoye, Ouwafemi Amos, Ajagbe et Adekune David. « Performance and haematological indices of broiler chickens fed varied inclusion level of palm kernel cake ». GSC Biological and Pharmaceutical Sciences 21, n^o 1 (30 octobre 2022) : 208–14. http://dx.doi.org/10.30574/gscbps.2022.21.1.0380.

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A total of one hundred and forty four (144) broiler chickens in a 42-day trial were used to evaluate the effect of graded levels of palm kernel cake on the performance and haematological characteristics of broilers. The broilers were randomly allotted to four treatments with 0%, 10%, 20% and 30 % PKC inclusion levels designated as treatments 1, 2, 3 and 4 respectively in a Completely Randomized Design (CRD). Each treatment had three (3) replicates with twelve (12) birds per replicate. Growth performance showed higher significant (P<0.05) values of 2073.68 g, 1874.39 g, 44.63 g and 101.49 g respectively for final weight, weight gain, daily weight gain and daily feed intake from birds fed 30 % PKC. Value ranges of 32.14 % to 34.67 % 10.36 g/dl to 11.37 g/dl, 3.17 to 3.49 x1012/l were obtained for packed cell volume, haemoglobin, and red blood cell in birds fed the control and 30 % PKC based diets respectively. This implied PKC has the potential to improved growth performance and haematology of boilers chicken. It was concluded that inclusion of PKC in the broiler’s diets significantly improved the performance and haematological parameters of the broiler chickens therefore should be included in the formulation of broilers diets for up to 30 %.

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Thèses sur le sujet "Broilers"

Jones, Robert Eric. « Effect of feeding calcium propionate on carcass composition, and productive performance of male broilers ». Morgantown, W. Va. : [West Virginia University Libraries], 1999. http://etd.wvu.edu/templates/showETD.cfm?recnum=778.

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Thesis (M.S.)--West Virginia University, 1999.
Title from document title page. Document formatted into pages; contains viii, 69 p. : ill. (some col.) Vita. Includes abstract. Includes bibliographical references (p. 58-62).

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Massey, Joseph W. « Comparison of broiler breeder production and fertility in a colony cage system with two different floors versus a slat-floor system ». Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2447.

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Thesis (M.S.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains viii, 46 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 29-31).

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Iji, Paul Ade. « Natural development and dietary regulation of body and intestinal growth in broiler chickens ». Title page, contents and summary only, 1998. http://web4.library.adelaide.edu.au/theses/09PH/09phi25.pdf.

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Corrigenda inserted behind title page. Bibliography: leaves 275-306. The pattern of body growth and intestinal development of an Australian strain of broiler chicken, the Steggles x Ross (F1) in response to different diets was studied. Five experiments were designed to examine the pattern of growth and mechanisms involved. In four other experiments, the mechanisms underlying the gross response of the broiler chicks to dietary ingredients, anti-nutritive factors and growth enhancers were examined. Results indicated that a rapid development of the small intestine preceded significant overall body growth. Body growth would, however, depend more on the various physiological events such as those related to mucosal growth and renewal, digestive enzyme function, and nutrient transport. Some of the differences observed in productivity of broiler chickens on different diets were traced to events at the intestinal level.

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Decolongon, Joji. « The influence of slat material, slat coverage and breeder age on broiler breeder reproduction and progeny growth ». Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/28978.

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This study was conducted to examine the potential of plastic slats as flooring material for maintenance of broiler breeders. Although plastic slats are more expensive than wood slats, plastic slats are more durable and easier to clean. Wood and plastic slats were tested as full and partial flooring to determine the ideal proportion of slats for broiler breeder floors. Space allotment was 2040 cm²/bird on all floor treatments. . Arbor Acres broiler breeders, one of the more common strains in British Columbia, were raised to 58 weeks of age to monitor the influence of slat material and slat coverage on egg production and progeny growth over one production cycle. Since the pens were not set up to determine the number of eggs lost through slats, "egg production" values were actually egg recovery values. Over-all egg recovery was significantly higher on partial wood (PWS) and partial plastic slats (PPS) than on either of the full slat treatments. Breeders on full wood slats (FWS) had higher over-all egg production than those on full plastic slats (FPS). Differences were significant for three biweekly periods, but slats did not influence the over-all incidence of floor eggs and cracked floor eggs. The incidence of cracked nest eggs was significantly higher in FWS and FPS than in PWS and PPS pens during four lay periods and overall. The proportion of non-cracked nest eggs, which was taken as an approximation of the proportion of settable eggs, was higher for partial slat pens than full slat pens, and FWS pens had a higher proportion of non-cracked nest eggs than FPS pens. To monitor fertility and hatchability, eggs were incubated at 37, 42, 46, 50 and 56 weeks of breeder age. Fertility, hatchability of total eggs set and hatchability of fertile eggs was not affected by type of slats. Progeny from the hatch at 37, 46 and 56 week of breeder age were grown in Petersime battery cages to three weeks of age. The progeny of breeders on FPS had lower first week weight gain than the other progeny groups due to moisture loss when 7 FPS progeny were lost during the second growth trial. Weekly and over-all feed conversion of progeny was not affected by types of slats used by parents. The 56th week progeny were grown in Petersime battery cages to market age (six weeks). PWS and FPS progeny had higher third week weight gain than PPS progeny. During the sixth week, FWS and PWS progeny had higher weight gain than FPS and PPS progeny. The sixth week feed conversion of FPS progeny was higher than that of the other three progeny groups. No other differences were seen. As long as slats were used as partial flooring, there were no differences in egg production on wood or plastic slats. The proportion of "settable" eggs, fertility, and hatchability of eggs of plastic slat breeders were comparable with that of wood slat breeders regardless of slat coverage. There were significant differences in the 3-week growth of 37th, 46th and 56th week progeny and the 6-week growth of 56th week progeny on the different slat types, but the differences were not due to slat treatments. There was no interaction between breeder age and slat material, therefore the influence of slat material on egg production and progeny growth did not vary with breeder age. Although egg recovery and the number of settable eggs were lower for FPS breeders, breeders on plastic slats performed as well as those on wood slats in the present study.
Land and Food Systems, Faculty of
Graduate

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Botlhoko, Tuelo David. « Performance of Clostridium perfringens-challenged broilers inoculated with effective microorganisms ». Pretoria : [s.n.], 2010. http://upetd.up.ac.za/thesis/available/etd-02192010-172630.

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Jansen, van Rensburg Christine. « The ameliorating effect of oxihumate on aflatoxine in broilers ». Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-05082006-110731.

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MacLean, Janice L. (Janice Leigh). « Genetic and nutritional factors affecting growth, nutrient utilization and body composition of broiler chickens ». Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22395.

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Two growth trials were designed to measure the effects of: (1) dietary Virginiamycin (0 or 16.5 mg/kg) and added fat (0 or 4%), and (2) Virginiamycin (0 or 16.5 mg/kg) and dietary lysine levels (low, NRC, high) individually, and in combination on broiler performance. A third trial investigated the relationship of plasma glucose, triglyceride and phospholipid concentrations with degree of fatness/leanness in genetically lean and fat broiler chickens. A combination of supplemental fat and Virginiamycin increased protein and decreased fat content of the dressed carcass. Virginiamycin supplementation overcame the growth depression of a low lysine diet by increasing feed intake. In the low lysine diet, Virginiamycin supplementation reduced abdominal fat deposition in females and increased carcass yield in males. Carcass protein content was increased by feeding the NRC-recommended level of lysine or by Virginiamycin supplementation. (Abstract shortened by UMI.)

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Newman, R. E. « Modulation of avian metabolism by dietary fatty acids ». Connect to full text, 2000. http://hdl.handle.net/2123/799.

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Thesis (Ph. D.)--University of Sydney, 2001.
Includes tables. Title from title screen (viewed Apr. 23, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Dept. of Animal Science, Faculty of Veterinary Science. Degree awarded 2001; thesis submitted 2000. Includes bibliography. Also available in print form.

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Gehring, Curran Kenji. « Improvement of the physical and nutritional quality of pelleted feed ». Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10563.

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Lehman, Regina N. Moran Edwin T. « The effect of gelatin and dietary crude protein level on broilers vaccinated for coccidiosis ». Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Poultry_Science/Thesis/Lehman_Regina_58.pdf.

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Livres sur le sujet "Broilers"

Food, Ontario Ministry of Agriculture and. Heat Stress in Broilers. S.l : s.n, 1987.

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Ontario. Ministry of Agriculture and Food. Basic husbandry for broilers. Toronto, Ont : Ministry of Agriculture and Food, 1993.

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Goodwin, John W. Supply and demand responses in the U.S. broiler industry. Fayetteville, Ark : Arkansas Agricultural Experiment Station, 1996.

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Martinez, Steve. Vertical coordination in the pork and broiler industries : Implications for pork and chicken products. [Washington, D.C.] : U.S. Dept. of Agriculture, Economic Research Service, 1999.

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B, Leclercq, et Whitehead C. C, dir. Leanness in domestic birds : Genetic, metabolic, and hormonal aspects. London : Published by arrangement with the Institut national de la recherche agronomique by Butterworths, 1988.

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E, Banker David, Green Robert C. 1947-, United States. Dept. of Agriculture. Economic Research Service et United States. Dept. of Agriculture, dir. Broiler farms' organization, management, and performance. Washington, D.C : U.S. Dept. of Agriculture, Economic Research Service, 1999.

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Leeson, Steven. Broiler breeder production. Nottingham : Nottingham University Press, 2009.

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Harris, Clarence E. Improved methods and facilities for packing broilers. Washington, D.C : U.S. Dept. of Agriculture, Agricultural Marketing Service, 1986.

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Harris, Clarence. Improved methods and facilities for packing broilers. Washington, D.C : U.S. Dept. of Agriculture, Agricultural Marketing Service, 1986.

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Chapitres de livres sur le sujet "Broilers"

McMullin, Paul. « The broiler industry and management of broilers and broiler parents. » Dans Poultry Health : A Guide for Professionals, 29–34. UK : CABI, 2021. http://dx.doi.org/10.1079/9781789245042.0005.

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Kouwenhoven, B., M. H. Vertommen et E. Goren. « Runting in Broilers ». Dans Acute Virus Infections of Poultry, 165–78. Dordrecht : Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4287-5_18.

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Voeten, A. C. « Coccidiosis : A Problem in Broilers ». Dans Energy Metabolism in Farm Animals, 410–22. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3363-7_24.

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Broom, Donald M. « Welfare of poultry. » Dans Broom and Fraser’s domestic animal behaviour and welfare, 339–60. 6^e éd. Wallingford : CABI, 2021. http://dx.doi.org/10.1079/9781789249835.0033.

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Scheele, C. W., W. Van Der Hel, M. W. A. Verstegen et A. M. Henken. « Climatic Environment and Energy Metabolism in Broilers ». Dans Energy Metabolism in Farm Animals, 217–60. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3363-7_14.

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Siqueira, J. C., N. K. Sakomura, R. M. Gous, I. A. M. A. Teixeira, J. B. K. Fernandes et E. B. Malheiros. « Model to estimate lysine requirements of broilers ». Dans Modelling nutrient digestion and utilisation in farm animals, 306–14. Wageningen : Wageningen Academic Publishers, 2011. http://dx.doi.org/10.3920/978-90-8686-712-7_34.

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Wang, Xinxin, Cong Wang, Zhenyong Wang, Weiwei Li, Wenhua Sun, Fengyi Zhang, Yunda Hong et al. « Antioxidant Effect of Taurine on Chronic Heat-Stressed Broilers ». Dans Advances in Experimental Medicine and Biology, 161–69. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93337-1_16.

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Jørgensen, Anders, Jacob V. Dueholm, Jens Fagertun et Thomas B. Moeslund. « Weight Estimation of Broilers in Images Using 3D Prior Knowledge ». Dans Image Analysis, 221–32. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20205-7_19.

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Roberts, Tanya, et Johan Lindblad. « Sweden Led Salmonella Control in Broilers : Which Countries Are Following ? » Dans Food Safety Economics, 231–49. Cham : Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92138-9_12.

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Lessire, M., Y. Primot, E. Corrent, Fraysse Pauline, S. Tesseraud et C. Berri. « Lysine supply in finishing broilers : effect on performances and meat quality ». Dans Energy and protein metabolism and nutrition in sustainable animal production, 209–10. Wageningen : Wageningen Academic Publishers, 2013. http://dx.doi.org/10.3920/978-90-8686-781-3_67.

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Actes de conférences sur le sujet "Broilers"

Doskovic, Vladimir, Snežana Bogosavljevic-Boškovic, Zdenka Škrbic, Miloš Lukic, Simeon Rakonjac, Veselin Petricevic et Dejan Beukovic. « EFEKAT ENZIMA PROTEAZE NA PRINOS I UDEO JESTIVIH PRATEĆIH PROIZVODA KLANJA PILIĆA HIBRIDA MASTER GRIS ». Dans XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.269d.

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The effect of supplemental protease (Ronozyme ProAct) in broiler diet on the weights and percentage yields of slaughter by-products of male and female medium-growing Master Gris broiler chickens was analysed. Fattening period lasted for 63 days. Broilers were assigned to 3 experimental groups, each consisting of 100 birds. Experimental groups differed in protease levels used in their diets: control broilers (C) received complete feeds (starter, grower and finisher) without supplemental protease; chickens in the experimental group E-I were given a diet containing 0.2% protease and crude protein levels reduced by 4% compared with the control group, whereas experimental E-II broilers were fed a diet supplemented with 0.3% protease and containing crude protein levels reduced by 6% compared with C birds. The analysis of the results showed that feeding treatments had a very small effect on the weights and proportion yields of edible by-products (with difference only in the percentage yield of liver relative to live weight between C and E-I broilers, P<0.05), whereas sex was found to affect almost all slaughter by-products (except abdominal fat weight and the percentage yield of gizzard relative to live weight, P>0.05).

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Niyonshuti, Eric, et Figen Kırkpınar. « Assessment of the Last Decades Studies and Developments in Broilers Nutrition ». Dans International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.003.

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The poultry industry has advanced remarkably over the past 30 years. In particular, broiler production has been the most successful than any other sector in the animal industry. Production standards of broilers have continuously improved over this period, with modern broilers reaching a live average weight of 2.5 kg at 33 – 35 days. Today, under normal conditions, a broiler chicken can gain an average weight of 65 g per day and can attain 1.5 feed conversion ratio (FCR). Genetic selection brought about by breeding companies has played a big part in the improvements of broiler growth, and advances in nutritional management have provided about 10 to 15% of these changes. In conclusion, future broiler nutrition studies are going to be continued on the plane of economic criteria, determination of alternative feedstuffs and their cultivation, production of new feed additives, sustainability, and food or product quality. However, broiler nutrition studies are expected to contain not only pure and applied nutrition but also to answer and to enlighten some discussed issues such as to support animal welfare, consumer health, and ecological equilibrium. In this review, the latest improvements in feed formulation with much attention on metabolizable energy (ME) and crude protein (CP), feeding systems and feed presentation, use of feed additives to enhance feed use and broiler performance are discussed.

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Eglite, Sabine, Aija Ilgaza et Maksims Zolovs. « The probiotic mixture X feeding effect on the growth and development of broiler chicken digestive tract ». Dans Research for Rural Development 2022 : annual 28th international scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2022. http://dx.doi.org/10.22616/rrd.28.2022.019.

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The issue of antibiotic resistance has become more pressing in the last decades. Therefore, substitutes for antibiotics are being sought. The aim of our study was to evaluate the effect of the mixture x of lactic acid bacteria on development of the broiler chicken digestive tract and the growth. The study was organised in three trials. In each trial, 260 one day old Ross 308 broiler chicks (males and females) were obtained from a commercial hatchery. They were randomly divided in two groups – the control group and the probiotic group. The dietary treatment was basal diet for the control group and basal diet + the mixture X of lactic acid bacteria 4 g 10 kg-1 for the probiotic group. Broilers were raised till day 35. All broilers were weighted on the day 1, 7, 14, 21, 28, 35 and 10 birds per treatment were randomly selected and killed by cervical dislocation. The gastrointestinal tract was excised (proventriculus, gizzard, intestines) and weighed with content. Overall, this study achieved significant results of the body weight results in the probiotic and the control groups, 2,835.7g ±161.74 and 2,828.02±115.64, respectively. The body weight of chickens and their gastrointestinal tract parts (proventriculus, gizzard, intestines) did not differ between the probiotic and control groups (p > 0.05).

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Benicio, Luana Maria, K�sia O. S. Miranda, Tami Brown Brandl, Joseph L. Purswelld, Sudhenu Raj Sharmab et Isabella C. F. S. Condottad. « Broilers� weight estimation through depth image analysis ». Dans 2021 ASABE Annual International Virtual Meeting, July 12-16, 2021. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2021. http://dx.doi.org/10.13031/aim.202100803.

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E.P., Dolgov, Abramov A.A., Vasiliadi O.I., Vlasenko A.A. et Semenenko K.A. « STUDYING THE INTESTINAL MORPHOLOGICAL PICTURE OF BROILER CHICKEN IN THERAPY OF MYCOTOXICOSIS ». Dans "INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION". ДГТУ-Принт, 2021. http://dx.doi.org/10.23947/itno.2021.104-107.

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The article provides data on the study of the effect of a combination of mycotoxins on the body of broilers (T-2 toxin at – a concentration of 0.095 mg/kg and aflatoxin B1 – 0.019 mg/kg) and the results of toxicosis therapy with the drug fibralin consisting of plant fibers of beet pulp, phospholipids of rapeseed lecithin and sodium thiosulfate. Structural changes in the intestines of broilers during feed mycotoxicosis are described. The use of the anti-toxic drug fibralin in poultry leads to a weakening of the effect of xenobiotics, which was confirmed by an increase in the safety of the livestock and weight gain of chickens, a decrease in the clinical manifestations of intoxication, as well as positive changes in the structure of the bird's intestines during histological examination.

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RD MacDonald, Mark Armstrong et Terry Feldmann. « Vented vs. Unvented Infrared Heating Systems for Broilers ». Dans 2002 Chicago, IL July 28-31, 2002. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2002. http://dx.doi.org/10.13031/2013.11236.

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Xiuping Tao et Hongwei Xin. « Temperature-Humidity-Velocity Index for Market-size Broilers ». Dans 2003, Las Vegas, NV July 27-30, 2003. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.14094.

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Alfredo Lora Graña, Horacio Santiago Rostagno, Luiz Fernando Teixeira Albino, Gonzalo Lora Graña et Guilherme Rodrigues Lelis. « Nutritional Strategies to Reduce Nutrient Excretion in Broilers ». Dans Livestock Environment VIII, 31 August - 4 September 2008, Iguassu Falls, Brazil. St. Joseph, MI : American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.25515.

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Knížková, I., P. Kunc, I. Langrová, J. Vadlejch et I. Jankovská. « Thermal profile of broilers infected by Eimeria tenella ». Dans 2018 Quantitative InfraRed Thermography. QIRT Council, 2018. http://dx.doi.org/10.21611/qirt.2018.p3.

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Kapitonova, E. A. « ANALYSIS OF MEAT QUALITIES OF BROILERS IN MATHEMATICAL MODELING OF EXPERIENCE ». Dans "International Scientific and Practical Conference" THEORY AND PRACTICE OF VETERINARY PHARMACY, ECOLOGY AND TOXICOLOGY IN AIC ", dedicated to the centenary of the Department of Pharmacology and Toxicology, SPbSUVM. FSBEI HE St. Petersburg SUVM, 2021. http://dx.doi.org/10.52419/3006-2021-2-113-115.

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The development of new mycotoxin adsorbents is an urgent problem of high practical significance. The use of mycotoxin adsorbents of a new generation in broiler poultry farming, allows to increase the yield of carcasses and the quality of meat of broiler chickens. In the laboratory, we have identified the comparative effectiveness of the adsorbents "MeKaSorb" and "Belasorb". The results obtained made it possible to test the adsorbents in production conditions.

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Rapports d'organisations sur le sujet "Broilers"

van Krimpen, M. M., R. A. van Emous, J. W. Spek et C. Kwakernaak. Phytate degradation in broilers. Wageningen : Wageningen Livestock Research, 2016. http://dx.doi.org/10.18174/391336.

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Cahaner, Avigdor, Sacit F. Bilgili, Orna Halevy, Roger J. Lien et Kellye S. Joiner. effects of enhanced hypertrophy, reduced oxygen supply and heat load on breast meat yield and quality in broilers. United States Department of Agriculture, novembre 2014. http://dx.doi.org/10.32747/2014.7699855.bard.

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Original objectivesThe objectives of this project were to evaluate the growth performance, meat yield and quality attributes of broiler strains widely differing in their genetic potential under normal temperature vs. warm temperature (short and long-term) conditions. Strain differences in breast muscle accretion rate, metabolic responses under heat load and, gross and histopathological changes in breast muscle under thermal load was also to be characterized. BackgroundTremendous genetic progress has been made in broiler chicken growth rate and meat yield since the 1950s. Higher growth rate is driven by higher rates of feed intake and metabolism, resulting in elevated internal heat production. Hot rearing conditions negatively affect broiler growth by hindering dissipation of heat and may lead to a lethal elevation in body temperature. To avoid heat-induced mortality, broilers reduce feed intake, leading to depressed growth rate, lower weight gain, reduce breast meat yield and quality. Thus, the genetic potential of contemporary commercial broilers (CCB) is not fully expressed under hot conditions. Major conclusions, solutions, and achievementsResearch conducted in Israel focused on three broiler strains – CCB, Featherless, Feathered sibs (i.e., sharing similar genetic background). Complimentary research trials conducted at Auburn utilized CCB (Cobb 500, Cobb 700, Ross 308, Ross 708), contrasting their performance to slow growing strains. Warm rearing conditions consistently reduced feed intake, growth rate, feed efficiency, body weight uniformity and breast muscle yield, especially pronounced with CCB and magnified with age. Breast meat quality was also negatively affected, as measured by higher drip loss and paler meat color. Exposure to continuous or short-term heat stress induced respiratory alkalosis. Breast muscle histomorphometrics confirmed enhanced myofiber hypertrophy in CCB. Featherless broilers exhibited a significant increase in blood-vessel density under warm conditions. Rapid growth and muscle accretion rate was correlated to various myopathies (white striping, woody and necrotic) as well as to increases in plasma creatinekinase levels. Whether the trigger(s) of muscle damage is loss of cellular membrane integrity due to oxidative damage or tissue lactate accumulation, or to loss of inter-compartmental cation homeostasis is yet to be determined. Based on genome-wide single-nucleotide polymorphism array genotyping, identification of the gene with the recessive mutation Scaleless (sc) facilitated the development a dCAPS assay to discriminate between sc carrier (sc/+) and non-carrier (+/+) individuals. ImplicationsThis project confirmed that featherless broiler strains grow efficiently with high yield and quality of breast meat, even under warm rearing conditions that significantly depress the overall performance of CCB. Therefore, broiler meat production in hot regions and climates can be substantially improved by introducing the featherless gene into contemporary commercial broiler stocks. This approach has become more feasible with the development of dCAPS assay. A novel modification of the PCR protocol (using whole blood samples instead of extracted DNA) may contribute to the efficient development of commercial featherless broiler strains. Such strains will allow expansion of the broiler meat production in developing countries in warm climates, where energy intensive environmental control of rearing facilities are not economical and easily achievable.

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Uni, Zehava, et Peter Ferket. Enhancement of development of broilers and poults by in ovo feeding. United States Department of Agriculture, mai 2006. http://dx.doi.org/10.32747/2006.7695878.bard.

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The specific objectives of this research were the study of the physical and nutritional properties of the In Ovo Feeding (IOF) solution (i.e. theosmostic properties and the carbohydrate: protein ratio composition). Then, using the optimal solution for determining its effect on hatchability, early nutritional status and intestinal development of broilers and turkey during the last quarter of incubation through to 7 days post-hatch (i.e. pre-post hatch period) by using molecular, biochemical and histological tools. The objective for the last research phase was the determination of the effect of in ovo feeding on growth performance and economically valuable production traits of broiler and turkey flocks reared under practical commercial conditions. The few days before- and- after hatch is a critical period for the development and survival of commercial broilers and turkeys. During this period chicks make the metabolic and physiological transition from egg nutriture (i.e. yolk) to exogenous feed. Late-term embryos and hatchlings may suffer a low glycogen status, especially when oxygen availability to the embryo is limited by low egg conductance or poor incubator ventilation. Much of the glycogen reserve in the late-term chicken embryo is utilized for hatching. Subsequently, the chick must rebuild that glycogen reserve by gluconeogenesis from body protein (mostly from the breast muscle) to support post-hatch thermoregulation and survival until the chicks are able to consume and utilize dietary nutrients. Immediately post-hatch, the chick draws from its limited body reserves and undergoes rapid physical and functional development of the gastrointestinal tract (GIT) in order to digest feed and assimilate nutrients. Because the intestine is the nutrient primary supply organ, the sooner it achieves this functional capacity, the sooner the young bird can utilize dietary nutrients and efficiently grow at its genetic potential and resist infectious and metabolic disease. Feeding the embryo when they consume the amniotic fluid (IOF idea and method) showed accelerated enteric development and elevated capacity to digest nutrients. By injecting a feeding solution into the embryonic amnion, the embryo naturally consume supplemental nutrients orally before hatching. This stimulates intestinal development to start earlier as was exhibited by elevated gene expression of several functional genes (brush border enzymes an transporters , elvated surface area, elevated mucin production . Moreover, supplying supplemental nutrients at a critical developmental stage by this in ovo feeding technology improves the hatchling’s nutritional status. In comparison to controls, administration of 1 ml of in ovo feeding solution, containing dextrin, maltose, sucrose and amino acids, into the amnion of the broiler embryo increased dramatically total liver glycogen in broilers and in turkeys in the pre-hatch period. In addition, an elevated relative breast muscle size (% of broiler BW) was observed in IOF chicks to be 6.5% greater at hatch and 7 days post-hatch in comparison to controls. Experiment have shown that IOF broilers and turkeys increased hatchling weights by 3% to 7% (P<0.05) over non injected controls. These responses depend upon the strain, the breeder hen age and in ovo feed composition. The weight advantage observed during the first week after hatch was found to be sustained at least through 35 days of age. Currently, research is done in order to adopt the knowledge for commercial practice.

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Yahav, Shlomo, John Brake et Noam Meiri. Development of Strategic Pre-Natal Cycling Thermal Treatments to Improve Livability and Productivity of Heavy Broilers. United States Department of Agriculture, décembre 2013. http://dx.doi.org/10.32747/2013.7593395.bard.

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The necessity to improve broiler thermotolerance and live performance led to the following hypothesis: Appropriate comprehensive incubation treatments that include significant temperature management changes will promote angiogenesis and will improve acquisition of thermotolerance and carcass quality of heavy broilers through epigenetic adaptation. It was based on the following questions: 1. Can TM during embryogenesis of broilers induce a longer-lasting thermoregulatory memory (up to marketing age of 10 wk) that will improve acquisition of thermotolerance as well as increased breast meat yield in heavy broilers? 2. The improved sensible heat loss (SHL) suggests an improved peripheral vasodilation process. Does elevated temperature during incubation affect vasculogenesis and angiogenesis processes in the chick embryo? Will such create subsequent advantages for heavy broilers coping with adverse hot conditions? 3. What are the changes that occur in the PO/AH that induce the changes in the threshold response for heat production/heat loss based on the concept of epigenetic temperature adaptation? The original objectives of this study were as follow: a. to assess the improvement of thermotolerance efficiency and carcass quality of heavy broilers (~4 kg); b. toimproveperipheral vascularization and angiogenesis that improve sensible heat loss (SHL); c. to study the changes in the PO/AH thermoregulatory response for heat production/losscaused by modulating incubation temperature. To reach the goals: a. the effect of TM on performance and thermotolerance of broilers reared to 10 wk of age was studied. b. the effect of preincubation heating with an elevated temperature during the 1ˢᵗ 3 to 5 d of incubation in the presence of modified fresh air flow coupled with changes in turning frequency was elucidated; c.the effect of elevated temperature on vasculogenesis and angiogenesis was determined using in ovo and whole embryo chick culture as well as HIF-1α VEGF-α2 VEGF-R, FGF-2, and Gelatinase A (MMP2) gene expression. The effects on peripheral blood system of post-hatch chicks was determined with an infrared thermal imaging technique; c. the expression of BDNF was determined during the development of the thermal control set-point in the preoptic anterior hypothalamus (PO/AH). Background to the topic: Rapid growth rate has presented broiler chickens with seriousdifficulties when called upon to efficiently thermoregulate in hot environmental conditions. Being homeotherms, birds are able to maintain their body temperature (Tb) within a narrow range. An increase in Tb above the regulated range, as a result of exposure to environmental conditions and/or excessive metabolic heat production that often characterize broiler chickens, may lead to a potentially lethal cascade of irreversible thermoregulatory events. Exposure to temperature fluctuations during the perinatal period has been shown to lead to epigenetic temperature adaptation. The mechanism for this adaptation was based on the assumption that environmental factors, especially ambient temperature, have a strong influence on the determination of the “set-point” for physiological control systems during “critical developmental phases.” Recently, Piestunet al. (2008) demonstrated for the first time that TM (an elevated incubation temperature of 39.5°C for 12 h/d from E7 to E16) during the development/maturation of the hypothalamic-hypophyseal-thyroid axis (thermoregulation) and the hypothalamic-hypophyseal-adrenal axis (stress) significantly improved the thermotolerance and performance of broilers at 35 d of age. These phenomena raised two questions that were addressed in this project: 1. was it possible to detect changes leading to the determination of the “set point”; 2. Did TM have a similar long lasting effect (up to 70 d of age)? 3. Did other TM combinations (pre-heating and heating during the 1ˢᵗ 3 to 5 d of incubation) coupled with changes in turning frequency have any performance effect? The improved thermotolerance resulted mainly from an efficient capacity to reduce heat production and the level of stress that coincided with an increase in SHL (Piestunet al., 2008; 2009). The increase in SHL (Piestunet al., 2009) suggested an additional positive effect of TM on vasculogenesis and angiogensis. 4. In order to sustain or even improve broiler performance, TM during the period of the chorioallantoic membrane development was thought to increase vasculogenesis and angiogenesis providing better vasodilatation and by that SHL post-hatch.

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Lamont, Susan J., Jack C. M. Dekkers et Joseph McElroy. Genetics of High-Value Yield in Broilers. Ames (Iowa) : Iowa State University, janvier 2004. http://dx.doi.org/10.31274/ans_air-180814-1001.

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Spek, J. W. Standardized ileal digestible lysine requirement for broilers. Wageningen : Wageningen Livestock Research, 2018. http://dx.doi.org/10.18174/455512.

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Spek, J. W. Standardized ileal digestible threonine requirement for broilers. Wageningen : Wageningen Livestock Research, 2018. http://dx.doi.org/10.18174/455514.

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Spek, J. W. Standardized ileal digestible tryptophan requirement for broilers. Wageningen : Wageningen Livestock Research, 2018. http://dx.doi.org/10.18174/455515.

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Spek, J. W. Standardized ileal digestible valine requirement for broilers. Wageningen : Wageningen Livestock Research, 2018. http://dx.doi.org/10.18174/455516.

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Spek, J. W. Standardized ileal digestible isoleucine requirement for broilers. Wageningen : Wageningen Livestock Research, 2018. http://dx.doi.org/10.18174/455517.

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