Effects of maternal nutrition on hatchability

Wilson, H. R.

doi:10.1093/ps/76.1.134

Cited by 114 publications

(73 citation statements)

References 105 publications

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“…The factors that affect hatchability include egg hygiene, egg storage conditions and period, incubation temperature, humidity, egg orientation, egg turning, ventilation, and sanitation. Incubation temperature for ratites ranges from 35.9 to 36.5°C (Wilson 1997). Estimated relative humidity (RH) requirements are 15-20% during incubation and 40% during hatching.…”

Section: Introductionmentioning

confidence: 99%

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Effects of thermal manipulation during late incubation period on post-hatch thermotolerance in ostrich

Elsayed¹

2016

CZECH J ANIM SCI

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ABSTRACT:The effects of thermal manipulation (TM) during late ostrich embryonic development on hatchability, body weight, biochemical and hormonal changes, and the ability of hatching chicks to cope with thermal challenge in days 6-8 of age were examined. At 35 days of incubation, two hundred fertile eggs were weighed and divided into two equal groups with five replicates. The first group was exposed to 36.5°C and 25% relative humidity (RH) (control), while the second group was exposed to 38.5°C and 45% RH for 3 h daily in days 35-37 of incubation (thermal manipulation). At days 6-8 of age, the hatched chicks from each treatment were randomly divided into two groups: control group (exposed to 32 ± 1°C), and thermal challenge group (exposed to 40 ± 1°C for 3 h daily). Hatchability rate was significantly lower with high incubation temperature as compared to the normal incubation temperatures. Embryonic TM and thermal challenge in days 6-8 of age reduced significantly total protein, albumin, and triiodothyronin concentrations and elevated uric acid, creatinine, triglycerides, and glucose concentrations as compared with the control. The level of corticosterone was significantly higher in the thermal challenge group as compared to the control. In conclusion, exposing the ostrich embryos to TM (38.5°C) during late embryonic development induced physiological changes that may represent epigenetic adaptation to TM. The same mechanisms are employed for increasing the ability to improve thermotolerance post-hatch.

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Section: Introductionmentioning

confidence: 99%

“…Major factors contributing to egg weight loss are shell porosity and RH. Other factors include egg size and incubation temperature (Wilson 1997). Increasing the incubation temperature from 36.0 to 37.2°C reduces hatchability from 73 to 44% (Stewart 1996).…”

Section: Introductionmentioning

confidence: 99%

Effects of thermal manipulation during late incubation period on post-hatch thermotolerance in ostrich

Elsayed¹

2016

CZECH J ANIM SCI

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“…Eggs with thinner eggshell had 3-9 % lower hatchability than the eggs with thicker eggshell (Bennet, 1992). There are many factors that have an impact on eggshell strength and its hatchability especially genotype, parents' health condition and age, season, nutrition, egg size and manipulation with it, way of breeding and conditions in incubators (Wilson, 1997;Bucher and Miles, 2003;Coutts et al, 2006). Main differences in eggshell's quality depend of genotype (parents' line) and way of their breeding .…”

Section: Introductionmentioning

confidence: 99%

The influence of strain and age on some egg quality parameters of commercial laying hens

2011

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The experiment was conducted to evaluate the influence of strain and age on some egg quality parameters (egg weight and egg shell strength) of commercial laying hens. Layers of lines ISA Brown and DeKalb White were examined in period of nine months. Both lines were at same age (28 weeks) and were confined in common facility in battery cages. Laying hens were reared and fed according to standard breeding technology. Once a month 25 eggs of each line were taken to be examined for eggshell strength and egg weight, or in other words, total 450 table eggs were tested. Analises were done in Laboratory for testing egg quality by gaudges Egg Multi Tester EMT 5200 and Egg shell Gauge (Robotmation Co. Ltd., Tokyo, Japan) which have computerised equipment to examine quality and physical characteristics of eggs. Statistic analyses on results were done by computer sub-programme ANOVA and Fisher's LSD test to determine the level of statistical significant difference between examined factors. Egg weight was under significant impact of age (P ? 0,05), but not under the influence of strain, although eggs of ISA Brown line were insignificantly heavier than eggs of DeKalb White line. Eggs were heaviest at layers with older age, while they were lightest at younger birds. The results have shown significant differences (P ? 0,05) in eggshell strength compared to line influence (genotype) and months of age. Eggs from ISA Brown laying hens had much better and eggshell strength than those eggs from DeKalb White. Correlations between eggshell strength and egg weight were with significant (R < 0,05) negative value, which indicating that with increasing egg weight decreases of eggshell strength.

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“…Therefore, optimizing of hatchery and breeder management can lead to improve chick's production (Heier and Jarp, 2001). Factors concerning breeder that affect hatchability include strain, breeder age, size of egg, egg quality and duration of egg storage (Wilson, 1997;Tona et al, 2005). Chick quality at hatch dependent on many factors including age of breeder, strain, quality of hatching eggs, chick health, egg handling and storage (Peebles et al, 2001;Tona et al, 2003;Decuypere and Bruggeman, 2007).…”

Section: Introductionmentioning

confidence: 99%

Impact of Strain, Egg Type, Breeder Age and Their Interactions on Hatching Traits and Chick Quality

2018

EPSJ

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Eight hundred hatching eggs from two Hy-Line chicken strains (400 Brown and 400 W-36) were acquired from two layer breeder ages (46 and 60 weeks). In each age there are four egg types (normal, large, rough and shape abnormality), each type containing fifty hatching eggs from each age either for Brown or W-36 chicken strains. Thus, this experiment was a 2×2×4 factorial design. There were no significant differences between strains for relative egg weight loss. Egg weight loss (%) increases with the breeder age. Relative egg weight loss was significantly higher in rough and abnormal eggs compared to their counterparts. Rough eggs type of brown strain at different breeder age had the lowest fertility and hatchability percentages compared to other egg types. Abnormal shape egg type had the lowest value of shape index. Brown chickens produced eggs had significantly higher relative eggshell weight compared to the white one. Shell percentage significantly decreases with advancing of hen's age. White eggs significantly recorded higher total pores per egg (7583) compared to the brown one (7249). Total pores significantly increases with breeder age. Large egg type was significantly higher in total pores compared to other egg types. Eggs with rough shell type had the highest embryonic mortality percentage in early stage (0-7 d of incubation) for each brown and W-36 strains at different ages, followed by eggs with shape abnormality compared to other egg types. Large egg type was significantly higher in hatched chick weight (46.85 g), then shape abnormality (41.12 g). There were no significant differences between strains for Tona score as indication of chick quality. Tona score decreased as the layer breeder age progressed. Rough egg type had the lowest value of Tona score (78.25 %); whereas, no significant difference was observed between other studied egg types (normal; 99.80, large; 95.65, and abnormal; 95.25 %). Tona score was significantly affected by all potential interactions, that means the expression of this trait was different based on strain, layer breeder age and egg type. It could be concluded that practically we can benefit from large and shape abnormality eggs, because there is no significant difference between them and normal eggs for most eggshell characteristics, chick quality and fertility & hatchability percentages.

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Effects of maternal nutrition on hatchability

Cited by 114 publications

References 105 publications

Effects of thermal manipulation during late incubation period on post-hatch thermotolerance in ostrich

Effects of thermal manipulation during late incubation period on post-hatch thermotolerance in ostrich

The influence of strain and age on some egg quality parameters of commercial laying hens

Impact of Strain, Egg Type, Breeder Age and Their Interactions on Hatching Traits and Chick Quality

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