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1. Broiler breeders roosted more on slats than on perches during the laying period

Author:
Annemarie J.W. Mens; Rick A. van Emous
Source:
Applied animal behaviour science 2022 v.246 pp. 105531
ISSN:
0168-1591
Subject:
broiler breeders,   etc   ; breasts; females; nest boxes; nests;     Show all 5 Subjects
Abstract:
... Roosting on elevated areas is part of natural chicken behaviour, and therefore perches are required for broiler breeders in some countries. However, elevated slats may also meet the behavioural requirements. To date, hardly any research has been done on broiler breeder preferences for roosting on slats or perches. An experiment was conducted between 40 and 60 weeks of age (WOA) to observe the rela ...
DOI:
10.1016/j.applanim.2021.105531

2. Phenotypic Correlations Between Egg Quality Traits Amid the Laying Phase of Broiler Breeder Hens

Author:
Marinko Vekić; Đorđe Savić; Stoja Jotanović
Source:
Contemporary Agriculture 2022 v.71 no.1-2 pp. 13-19
ISSN:
2466-4774
Subject:
broiler breeders,   etc   ; agriculture; descriptive statistics; egg weight; eggs; phenotype;     Show all 6 Subjects
Abstract:
... In order to determine phenotypic correlations between the quality traits of eggs from 41-week-old broiler breeder hens (Cobb 500), a total of 105 eggs suitable for incubation were analyzed using descriptive statistics and Pearson’s correlation coefficient. The average values of egg weight, egg length, egg width, egg shape index, shell thickness, shell weight, and shell ratio were 66.90 g, 60.00 mm ...
DOI:
10.2478/contagri-2022-0003

3. Effects of pre-incubation storage duration and nonventilation incubation procedure on embryonic physiology and post-hatch chick performance

Author:
A. Bilalissi; H.T. Meteyake; Y.A.E. Kouame; O.E. Oke; H. Lin; O. Onagbesan; E. Decuypere; K. Tona
Source:
Poultry science 2022 v.101 no.5 pp. 101810
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; blood serum; chicks; embryonic mortality; flocks; storage time; triiodothyronine;     Show all 7 Subjects
Abstract:
... This study investigated the effects and possible interactions of storage and nonventilation during incubation for eggs from Sasso broiler breeder flock on pre- and post-hatch incubation results. A total of 1,260 Sasso eggs from a 58-wk-old broiler breeder flock were individually numbered, weighed and stored for 7 d or for 18 d in a climate-controlled room (16°C, 75% RH). After storage, eggs were w ...
DOI:
10.1016/j.psj.2022.101810

4. Diet dilution and feeding frequency have only minor effects on the behaviour of broiler breeder pullets

Author:
Annemarie J.W. Mens; Ingrid C. de Jong; Johan W. van Riel; Henk Gunnink; Theo van Hattum; Rick A. van Emous
Source:
Applied animal behaviour science 2022 pp. 105678
ISSN:
0168-1591
Subject:
broiler breeders,   etc   ; body weight; diet; motivation; novel foods; oats; reproduction; restricted feeding;     Show all 8 Subjects
Abstract:
... During the rearing period, broiler breeders are feed restricted to prevent the negative impact of fast growth and high body weight on health and reproduction. Feed restriction causes frustration and stress, resulting in stereotypic pecking and hyperactivity. Nutritional strategies have the potential to reduce these welfare issues. Using a 2×2 factorial completely randomized block design, pullets w ...
DOI:
10.1016/j.applanim.2022.105678

5. Effectiveness of Administering a Mixture of Lactic Acid Bacteria to Control Salmonella ser. Enteritidis Infections in Broilers

Author:
Yu-Jin Kim; Sungsu Youk; Chang-Seon Song
Source:
Animals 2022 v.12 no.3 pp. -
ISSN:
2076-2615
Subject:
broiler breeders,   etc   ; Salmonella; antibiotics; competitive exclusion; lactic acid; salmonellosis; spleen; weight gain;     Show all 8 Subjects
Abstract:
... Non-typhoidal Salmonella spp. cause persistent asymptomatic infections in poultry. The consumption of Salmonella-infected poultry products is associated with food poisoning. One of the pathogens that causes such infections is Salmonella ser. Enteritidis (SE). Therefore, alternative measures are required for better control of salmonellosis and to reduce potential antibiotic use. Here, the efficacy ...
DOI:
10.3390/ani12030374

6. Research Note: Interaction between hatching time and chick pull time affects broiler live performance

Author:
R. Dişa; S. Özlü; O. Elibol
Source:
Poultry science 2022 v.101 no.6 pp. 101845
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; chicks; feed conversion; feed intake; mortality; poultry housing; weight gain;     Show all 7 Subjects
Abstract:
... This study investigated the effects of broiler chick hatching time and pull time on subsequent live performance. Hatching eggs were obtained from commercial broiler breeder flocks of Ross 308 at 29 and 30 wk of age in trials 1 and 2, respectively. Eggs were incubated in 2 identical setters on 2 consecutive days. In both trials, portion of the eggs (9,600), incubated on the first day of set, were a ...
DOI:
10.1016/j.psj.2022.101845

7. Impact of growth curve and dietary energy-to-protein ratio of broiler breeders on egg quality and egg composition

Author:
J. Heijmans; M. Duijster; W.J.J. Gerrits; B. Kemp; R.P. Kwakkel; H. van den Brand
Source:
Poultry science 2022 v.101 no.7 pp. 101946
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; diet; dose response; egg composition; egg quality; eggs; embryogenesis; growth curves;     Show all 8 Subjects
Abstract:
... Egg characteristics have an impact on embryonic development and post-hatch performance of broilers. The impact of growth curve (GC) and dietary energy-to-protein ratio of broiler breeder hens on egg characteristics was investigated. At hatch, 1,536 pullets were randomly allotted to 24 pens in a 2 × 4 factorial dose-response design with 2 GC (standard growth curve = SGC or elevated growth curve = E ...
DOI:
10.1016/j.psj.2022.101946

8. Commercial broiler breeder pullet hens use perches but show no preference for perch type or height

Author:
G. Vasdal; S.G. Gebhardt-Henrich; K.E. Kittelsen; F.M. Tahamtani
Source:
Applied animal behaviour science 2022 v.249 pp. 105608
ISSN:
0168-1591
Subject:
broiler breeders,   etc   ; animal behavior; breasts; dermatitis; flocks; hybrids; keel bone; perch; pododermatitis; pullets; steel; wood;     Show all 12 Subjects
Abstract:
... An important behavioral need for laying hens is perching, but few studies have investigated perching behavior in commercial broiler breeder pullets. The aim of this study was to investigate perching behavior throughout the pullet period and preferences for different perch types and heights. We also investigated the effect of hybrid on perching and the potential effect of perches on keel bone damag ...
DOI:
10.1016/j.applanim.2022.105608

9. Body weight, organ development and jejunal histomorphology in broiler breeder pullets fed n-3 fatty acids enriched diets from hatch through to 22 weeks of age

Author:
Aizwarya Thanabalan; Elijah G. Kiarie
Source:
Poultry science 2022 v.101 no.1 pp. 101514
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; diet; docosahexaenoic acid; jejunum; linseed; liver; microalgae; omega-3 fatty acids; spleen; tissue weight;     Show all 10 Subjects
Abstract:
... Dietary long chain polyunsaturated n-3 fatty acids (n-3 FA) may be beneficial to broiler breeder (BB) development. Therefore, the effects of feeding sources of docosahexaenoic acid (DHA) and α-linolenic acid (ALA) from hatch through to 22 weeks of age (woa) on growth, organ weight, and jejunal histomorphology were investigated. A total of 588-day-old Ross × Ross 708 BB were reared on one of 3 diet ...
DOI:
10.1016/j.psj.2021.101514

10. Genomic Analysis of Escherichia coli Longitudinally Isolated from Broiler Breeder Flocks after the Application of an Autogenous Vaccine

Author:
Liča Lozica; Kasper Rømer Villumsen; Ganwu Li; Xiao Hu; Maja Maurić Maljković; Željko Gottstein
Source:
Microorganisms 2022 v.10 no.2 pp. -
ISSN:
2076-2607
Subject:
broiler breeders,   etc   ; Escherichia coli; animal welfare; antibiotic resistance; autogenous vaccines; genomics; phylogeny; poultry production; single nucleotide polymorphism; virulence;     Show all 10 Subjects
Abstract:
... Escherichia coli is the main bacterial cause of major economic losses and animal welfare issues in poultry production. In this study, we investigate the effect of an autogenous vaccine on E. coli strains longitudinally isolated from broiler breeder flocks on two farms. In total, 115 E. coli isolates were sequenced using Illumina technologies, and compared based on a single-nucleotide polymorphism ...
DOI:
10.3390/microorganisms10020377

11. Impact of broiler breeder growth trajectory on plasma corticosterone concentration: a comparison of analytical methods

Author:
Mohammad Afrouziyeh; Martin J. Zuidhof
Source:
Poultry science 2022 v.101 no.5 pp. 101792
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; colorimetry; corticosterone; eggs; enzymatic reactions; excreta; feed intake; growth models; liquid chromatography; puberty; tandem mass spectrometry;     Show all 11 Subjects
Abstract:
... Blood concentration of corticosterone (CORT) is a measure of welfare in feed restricted broiler breeders. The RIA and ELISA have been routinely used for measuring CORT in blood, excreta, and feather. Due to the presence of some confounding factors in the aforementioned colorimetric enzyme reaction methods, some methodological difficulties have been attributed to those assays. The correlation betwe ...
DOI:
10.1016/j.psj.2022.101792

12. Comparative analysis of antimicrobial resistance and genetic characteristics of Escherichia coli from broiler breeder farms in Korea

Author:
Shin-Woo Kim; Koeun Kim; Young Ju Lee
Source:
Canadian journal of animal science 2022 v.102 no.2 pp. 342-351
ISSN:
0008-3984
Subject:
broiler breeders,   etc   ; Escherichia coli; acid tolerance; ampicillin; antibiotic resistance; cephalothin; chloramphenicol; genes; nalidixic acid; phenotype; tetracycline; virulence; Korean Peninsula;     Show all 13 Subjects
Abstract:
... Broiler breeder farms could be a reservoir of Escherichia coli, disseminating antimicrobial resistance and virulence factors. We investigated the antimicrobial resistance of E. coli from nine broiler breeder farms and characterised their resistance and virulence genes. A total of 256 E. coli showed a high level of resistance to tetracycline, nalidixic acid, ampicillin, and cephalothin, followed by ...
DOI:
10.1139/cjas-2021-0090

13. Quality Assessment of Day-Old Chickens on the Broiler Farms of Hong Kong

Author:
Omid Nekouei; Denis Yau; Brett MacKinnon; Ioannis Magouras; Anne Conan; Ibrahim Elsohaby; Surya Paudel; Dirk U. Pfeiffer
Source:
Animals 2022 v.12 no.12 pp. -
ISSN:
2076-2615
Subject:
broiler breeders,   etc   ; Avian orthoavulavirus 1; Avian orthoreovirus; Infectious bursal disease virus; antibodies; body weight; chicken industry; enzyme-linked immunosorbent assay; farms; hatcheries; yolk sac; China;     Show all 12 Subjects
Abstract:
... The present study aimed to investigate the quality of newly hatched broiler chicks delivered to Hong Kong (imported or local), and to develop tailored recommendations to improve their management. During 2019–2021, 70 batches (34 imported from mainland China and 36 local) of one/three day old chicks on 11 broiler farms were studied. From each batch, 23 or 24 chicks (1647 in total) were assessed for ...
DOI:
10.3390/ani12121520

14. The Impact of Pre- and Probiotic Product Combinations on Ex vivo Growth of Avian Pathogenic Escherichia coli and Salmonella Enteritidis

Author:
Laura Fuhrmann; Wilfried Vahjen; Jürgen Zentek; Ronald Günther; Eva-Maria Saliu
Source:
Microorganisms 2022 v.10 no.1 pp. -
ISSN:
2076-2607
Subject:
broiler breeders,   etc   ; Bacillus coagulans; Enterococcus faecium; Escherichia coli; Salmonella Enteritidis; antibiotic resistance; antibiotics; cecum; digesta; feed additives; fructooligosaccharides; growth retardation; inulin; pathogens; prebiotics; probiotics; turbidity;     Show all 17 Subjects
Abstract:
... Due to the global spread of antibiotic resistance, there is a strong demand to replace antimicrobial growth promotors in livestock. To identify suitable additives that inhibit the growth of avian pathogenic Escherichia coli O1/O18 and Salmonella enterica serotype Enteritidis strains, an ex vivo screening was performed. Inulin and fructooligosaccharides (FOS) were investigated as prebiotics. Entero ...
DOI:
10.3390/microorganisms10010121

15. Effects of diet density and feeding frequency during the rearing period on broiler breeder performance

Author:
R. A. van Emous; A. J. W. Mens; A. Winkel
Source:
British poultry science 2021 v.62 no.5 pp. 686-694
ISSN:
1466-1799
Subject:
broiler breeders,   etc   ; body weight; diet; egg production;     Show all 4 Subjects
Abstract:
... 1. An experiment was conducted to study the effects of diet density and feeding frequency during the rearing period on broiler breeder performance between three and 40 weeks of age. 2. A total of 960 female one-day-old chicks (Ross 308) were randomly allocated to 24 floor pens (12 pens in two rooms). On day 21 pullets were assigned to a 2 × 2 factorial arrangement including two diets (control (CON ...
DOI:
10.1080/00071668.2021.1918634

16. Modeling genetic components of hatch of fertile in broiler breeders

Author:
Bayode O. Makanjuola; Victor E. Olori; Raphael A. Mrode
Source:
Poultry science 2021 v.100 no.5 pp. 101062
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; chicks; heritability; models; pedigree; phenotype; reproductive efficiency;     Show all 7 Subjects
Abstract:
... Reproductive efficiency such as fertility and hatch of fertile (HoF) are of economic importance and concern to breeding companies becaue of their effects on chick output. Similar to other traits of economic importance in poultry breeding, the rate of response for HoF is largely dependent on the use of an appropriate model for evaluating the trait. Therefore, the objectives of this study were to es ...
DOI:
10.1016/j.psj.2021.101062

17. Effects of twice a day feeding and split feeding during lay on broiler breeder production performance, eggshell quality, incubation traits, and behavior

Author:
R.A. van Emous; A.J.W. Mens
Source:
Poultry science 2021 v.100 no.11 pp. 101419
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; diet; egg production; egg shell quality; energy; phosphorus;     Show all 6 Subjects
Abstract:
... Eggshell quality of broiler breeders’ eggs decreases at the end of the laying period. Feeding a limited daily allowance of feed in the morning does not supply the necessary nutrients, particularly calcium for eggshell formation, at the right time of the day. Therefore, an experiment was conducted to study the effects of providing a standard diet twice a day or split feeding (special morning and af ...
DOI:
10.1016/j.psj.2021.101419

18. A blend of microencapsulated organic acids and botanicals reduces necrotic enteritis via specific signaling pathways in broilers

Author:
Christina L. Swaggerty; J. Allen Byrd; Ryan J. Arsenault; Famatta Perry; Casey N. Johnson; Kenneth J. Genovese; Haiqi He; Michael H. Kogut; Andrea Piva; Ester Grilli
Source:
Poultry science 2022 v.101 no.4 pp. 101753
ISSN:
0032-5791
Subject:
broiler breeders,   etc   ; Clostridium perfringens; T-lymphocytes; animal health; byproducts; computer software; diet; financial economics; gene expression; interleukin-10; interleukin-6; jejunum; microencapsulation; models; mortality; necrotic enteritis; poultry industry; t-test; thymol; transcription factor NF-kappa B; vaccines; vanillin;     Show all 22 Subjects
Abstract:
... Necrotic enteritis (NE) is a devastating disease that has seen a resurgence of cases following the removal of antibiotics from feed resulting in financial loss and significant animal health concerns across the poultry industry. The objective was to evaluate the efficacy of a microencapsulated blend of organic (25% citric and 16.7% sorbic) acids and botanicals (1.7% thymol and 1% vanillin [AviPlusP ...
DOI:
10.1016/j.psj.2022.101753

19. Spraying Hatching Eggs with Clove Essential Oil Does Not Compromise the Quality of Embryos and One-Day-Old Chicks or Broiler Performance

Author:
Gabriel da Silva Oliveira; Sheila Tavares Nascimento; Vinícius Machado dos Santos; Bruno Stéfano Lima Dallago
Source:
Animals 2021 v.11 no.7 pp. -
ISSN:
2076-2615
Subject:
broiler breeders,   etc   ; alcohols; body weight changes; cloves; essential oils; feed conversion; feed intake; fumigation;     Show all 8 Subjects
Abstract:
... The objective of this study was to evaluate whether sanitizing hatching eggs with clove essential oil in the preincubation phase affects broiler performance and influences the hatch window and quality of embryos and one-day-old chicks. Hatching eggs (n = 1280; mean weight = 58.64 ± 0.49 g) from a batch of 37-week-old broiler breeder hens of the CPK (Pesadão Vermelho) lineage were randomly distribu ...
DOI:
10.3390/ani11072045

20. Effects of broiler breeder strain, age, and eggs preheating profile in single-stage systems on the hatchability of eggs and quality of chicks

Author:
K. Damaziak; M. Koznaka-Lipka; D. Gozdowski; A. Gołębiowska; E. Kędziorek
Source:
Animal 2021 v.15 no.1 pp. 100057
ISSN:
1751-7311
Subject:
broiler breeders,   etc   ; condensation (phase transition); egg hatchability; egg incubation; eggs; embryogenesis; flocks; heat; mortality; temperature;     Show all 10 Subjects
Abstract:
... Preheating can increase the efficiency of commercial broiler breeding. A slow increase in temperature can counteract the negative effects of water condensation on the surface of the shell and reduces the thermal shock to the embryos. It is essential to design different preheating profiles because of the variances between breeds in terms of egg construction and the course of embryogenesis, along wi ...
DOI:
10.1016/j.animal.2020.100057