scholarly journals Influence of feed form and nutritional characteristics of the diets on pullet performance and egg-laying hen productivity

2017 ◽  
Author(s):  
Beatriz Saldaña Mancebo
Keyword(s):  
Laying Hen ◽  
Egg Laying ◽  
Nutritional Characteristics ◽  
Feed Form

scholarly journals Mitigation Effects of Bentonite and Yeast Cell Wall Binders on AFB1, DON, and OTA Induced Changes in Laying Hen Performance, Egg Quality, and Health

Toxins ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 156
Author(s):  
Ling Zhao ◽  
Yue Feng ◽  
Jing-Tao Wei ◽  
Meng-Xiang Zhu ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Dietary Supplementation ◽  
Basal Diet ◽  
Liver Weight ◽  
Laying Hen ◽  
Egg Laying ◽  
Villus Height ◽  
Crypt Depth ◽  
Induced Changes

The objective of this study was to evaluate the efficacy of mycotoxin binders in reducing the adverse effects of co-occurring dietary aflatoxin B1 (AFB1), deoxynivalenol (DON) and ochratoxin A (OTA) on laying hens. Three hundred and sixty 26-week-old Roman laying hens were randomly allocated into four experimental groups with 10 replicates of nine birds each. The four groups received either a basal diet (BD; Control), a BD supplemented with 0.15 mg/kg AFB1 + 1.5 mg/kg DON + 0.12 mg/kg OTA (Toxins), a BD + Toxins with Toxo-HP binder (Toxins + HP), or a BD + Toxins with TOXO XL binder (Toxins + XL) for 12 weeks. Compared to the control, dietary supplementation of mycotoxins decreased (P < 0.10) total feed intake, total egg weight, and egg-laying rate, but increased feed/egg ratio by 2.5–6.1% and mortality during various experimental periods. These alterations induced by mycotoxins were alleviated by supplementation with both TOXO HP and XL binders (P < 0.10). Furthermore, dietary mycotoxins reduced (P < 0.05) eggshell strength by 12.3% and caused an accumulation of 249 μg/kg of DON in eggs at week 12, while dietary supplementation with TOXO HP or XL mitigated DON-induced changes on eggshell strength and prevented accumulation of DON in eggs (P < 0.05). Moreover, dietary mycotoxins increased relative liver weight, but decreased spleen and proventriculus relative weights by 11.6–22.4% (P < 0.05). Mycotoxin exposure also increased alanine aminotransferase activity and reduced immunoglobulin (Ig) A, IgM, and IgG concentrations in serum by 9.2–26.1% (P < 0.05). Additionally, mycotoxin exposure induced histopathological damage and reduced villus height, villus height/crypt depth, and crypt depth in duodenum, jejunum and (or) ileum (P < 0.05). Notably, most of these histological changes were mitigated by supplementation with both TOXO HP and XL (P < 0.05). In conclusion, the present study demonstrated that the mycotoxin binders TOXO HP and XL can help to mitigate the combined effects of AFB1, DON, and OTA on laying hen performance, egg quality, and health.

scholarly journals Effect of the Pellet and Mash Feed Forms on the Productive Performance, Egg Quality, Nutrient Metabolism, and Intestinal Morphology of Two Laying Hen Breeds

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 701
Author(s):  
Yi Wan ◽  
Ruiyu Ma ◽  
Anam Khalid ◽  
Lilong Chai ◽  
Renrong Qi ◽  
...  
Keyword(s):  
Feed Intake ◽  
Laying Hens ◽  
Egg Quality ◽  
Laying Hen ◽  
Intestinal Morphology ◽  
Production Performance ◽  
Apparent Digestibility ◽  
Villus Height ◽  
Nutrient Metabolism ◽  
Feed Form

One of the most important factors that determine feed utilization by chickens is the feed form. Although it is generally believed that pellet diets have a positive effect on chicken growth, there are some studies that have indicated no difference between pellet and mash on chickens performance. This study was conducted to assess the effects of feed form on production performance, egg quality, nutrient metabolism and intestinal morphology in two breed laying hens. Two hundred and sixteen 25-week-old Hy-Line brown (n = 108) and Hy-Line grey (n = 108) hens were selected. Each breed was randomly allocated into two treatments with 6 replications (9 birds in each replication), which were fed mash and pellet diets, respectively. Production performances were recorded daily and egg quality traits were measured every two weeks. At 42 weeks of age, one bird per replication from each experimental group was selected for metabolism determination and intestine morphology observation. Compared with mash diets, pellet diets improved laying rate (p < 0.05), ADFI (average daily feed intake, p < 0.05), egg weight, shell strength, yolk proportion and Haugh unit (p < 0.05) in both breeds and reduced the FCR (feed conversion ratio, p < 0.05) in Hy-Line grey. The apparent digestibility of DM% (dry matter) and CP% (crude protein) were significantly higher (p < 0.05) in both breed laying hens fed pellet than those fed mash. The apparent digestibility of P% (phosphorus) and Ca% (calcium) was higher in Hy-Line grey fed pellet and was higher in Hy-Line brown fed mash. Compared to mash diets, pellet diets increased the VH (villus height), CD (crypt depth) and VCR (ratio of villus height to crypt depth) of the small intestine of Hy-Line grey, and increased the VH and CD of duodenum and ileum of Hy-Line brown. Overall, pellet diets improved production performance and nutrition metabolism through positive changes in the laying rate, feed intake, egg albumen quality and apparent digestibility of laying hens. The current findings provided support for the advantages of feeding pellets during the peak egg laying period for the two popular laying hen strains, Hy-Line brown and Hy-Line grey.

scholarly journals Laying hen mortality in different indoor housing systems: a meta-analysis of data from commercial farms in 16 countries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cynthia Schuck-Paim ◽  
Elsa Negro-Calduch ◽  
Wladimir J. Alonso
Keyword(s):  
Production Systems ◽  
Meta Analysis ◽  
Animal Health ◽  
Laying Hen ◽  
Egg Laying ◽  
Housing Systems ◽  
Commercial Farms ◽  
Degree Of Maturity ◽  
Using Data ◽  
Average Drop

AbstractSocietal concern with the welfare of egg laying hens housed in conventional cages is fostering a transition towards cage-free systems in many countries. However, although cage-free facilities enable hens to move freely and express natural behaviours, concerns have also been raised over the possibility that cage-free flocks experience higher mortality, potentially compromising some aspects of their welfare. To investigate this possibility, we conducted a large meta-analysis of laying hen mortality in conventional cages, furnished cages and cage-free aviaries using data from 6040 commercial flocks and 176 million hens from 16 countries. We show that except for conventional cages, mortality gradually drops as experience with each system builds up: since 2000, each year of experience with cage-free aviaries was associated with a 0.35–0.65% average drop in cumulative mortality, with no differences in mortality between caged and cage-free systems in more recent years. As management knowledge evolves and genetics are optimized, new producers transitioning to cage-free housing may experience even faster rates of decline. Our results speak against the notion that mortality is inherently higher in cage-free production and illustrate the importance of considering the degree of maturity of production systems in any investigations of farm animal health, behaviour and welfare.

scholarly journals Characterization of Egg Laying Hen and Broiler Fecal Microbiota in Poultry Farms in Croatia, Czech Republic, Hungary and Slovenia

PLoS ONE ◽  
2014 ◽  
Vol 9 (10) ◽  
pp. e110076 ◽  
Author(s):  
Petra Videnska ◽  
Md. Masudur Rahman ◽  
Marcela Faldynova ◽  
Vladimir Babak ◽  
Marta Elsheimer Matulova ◽  
...  
Keyword(s):  
Czech Republic ◽  
Fecal Microbiota ◽  
Laying Hen ◽  
Egg Laying ◽  
Poultry Farms

scholarly journals Evidence of a Chemopreventive Effect of Progestin Unrelated to Ovulation on Reproductive Tract Cancers in the Egg-laying Hen

2013 ◽  
Vol 6 (12) ◽  
pp. 1283-1292 ◽  
Author(s):  
Gustavo C. Rodriguez ◽  
H. John Barnes ◽  
Kenneth E. Anderson ◽  
Regina S. Whitaker ◽  
Andrew Berchuck ◽  
...  
Keyword(s):  
Reproductive Tract ◽  
Laying Hen ◽  
Egg Laying ◽  
Chemopreventive Effect

Upregulation of kidney adenylate cyclase in the egg-laying hen: role of estrogen

1983 ◽  
Vol 245 (3) ◽  
pp. E273-E280 ◽  
Author(s):  
L. R. Forte ◽  
S. G. Langeluttig ◽  
H. V. Biellier ◽  
R. E. Poelling ◽  
L. Magliola ◽  
...  
Keyword(s):  
Adenylate Cyclase ◽  
Laying Hen ◽  
Egg Laying

Production of 1,25-Dihydroxyvitamin D3and Formation of Medullary Bone in the Egg-Laying Hen*

Endocrinology ◽  
1979 ◽  
Vol 104 (6) ◽  
pp. 1598-1601 ◽  
Author(s):  
L. CASTILLO ◽  
Y. TANAKA ◽  
M. J. WINELAND ◽  
J. O. JOWSEY ◽  
H. F. DELUCA
Keyword(s):  
Laying Hen ◽  
Egg Laying ◽  
Medullary Bone

scholarly journals Influence of the main cereal and feed form of the diet on performance and digestive tract traits of brown-egg laying pullets

2009 ◽  
Vol 88 (5) ◽  
pp. 994-1002 ◽  
Author(s):  
M. Frikha ◽  
H.M. Safaa ◽  
M.P. Serrano ◽  
X. Arbe ◽  
G.G. Mateos
Keyword(s):  
Digestive Tract ◽  
Egg Laying ◽  
Feed Form

Characterization ofSalmonellafrom Commercial Egg-Laying Hen Farms in a Central Region of Colombia

2015 ◽  
Vol 59 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Roy Rodríguez ◽  
Clemencia Fandiño ◽  
Pilar Donado ◽  
Libia Guzmán ◽  
Noel Verjan
Keyword(s):  
Central Region ◽  
Laying Hen ◽  
Egg Laying

scholarly journals Association of single nucleotide polymorphism at long non-coding RNA 8138.1 with duration of fertility in egg-laying hens

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7282
Author(s):  
Adeyinka Abiola Adetula ◽  
Syed Ali Azmal ◽  
Chenghao Sun ◽  
Abdelmotaleb Elokil ◽  
Shijun Li
Keyword(s):  
Laying Hens ◽  
Genetic Relationships ◽  
Laying Hen ◽  
Egg Laying ◽  
Transcriptional Analysis ◽  
Nucleotide Polymorphisms ◽  
Single Nucleotide ◽  
Non Coding Rna ◽  
Potential Biomarker ◽  
Long Non Coding Rna

A previous genome-wide transcriptional analysis identified long non-coding RNA 8138.1 (lncRNA8138.1) as a candidate gene related to hen duration of the fertility (DF) trait.LncRNA8138.1gene response to growth factor and reproductive system development suggests it has a vital role in reproduction. In this study, we investigated thelncRNA8138.1gene sequence in a population of egg-laying hens. The sequence analysis of thelncRNA8138.1gene containing about 1.6 k nucleotides (nt) was observed with four single nucleotide polymorphisms (SNPs) and 7 nt indel including r.4937159A > G; r.4937219T > C; r.4937258G > C; r.4937318C > G and g.4937319_4937325delinsTGTGTGG. Next, the genomic DNAs from laying hen populations were subjected to polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) to detect a region of 457 bp carryinglncRNA8138.1r.4937159A > G substitution. Further inspection of the region containing r.4937159A > G mutation revealed three genotypes viz., AA, AG, and GG were observed with respective frequencies of 0.106, 0.607, and 0.287 in laying hen population 1 (P1) (n = 1, 042) and respective frequencies of 0.176, 0.708, and 0.116 in laying hen population 2 (P2) (n = 826). Moreover, to further examining the frequencies of r.4937159A > G genotypes in P1 and P2, and their additive and dominance effects; r.4937159A > G locus was significantly associated with DF-trait in both P1 and P2 (EN: the number of eggs, FN: the number of fertile eggs after a single AI), and DN (the number of days post-insemination until last fertile egg). In testing for additive and dominance effects, additive effect was significant (P < 0.05) in both P1 and P2 for DF-trait, and the dominance effect was significant (P < 0.05) for EN and FN traits, suggesting that r.4937159A > G polymorphism is a potential biomarker for DF-trait. However, the identified novel r.4937159A > G mutation and others require further investigation to confirm phenotypic causality and potential genetic relationships with reproductive traits. Overall, our findings suggest the significance of genetic variation in long non-coding RNAs may assist in future breeding programs to improve selection for prolonged DF-trait.

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