Effect of Hatching Time on Yolk Sac Percentage and Broiler Live Performance

Özlü, Serdar; Shiranjang, Reza; Elibol, Okan; Brake, J.

doi:10.1590/1806-9061-2017-0579

Cited by 16 publications

(14 citation statements)

References 30 publications

(66 reference statements)

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“…At time of hatch, BW was highest ( P = 0.007) for late hatchers, lowest for early hatchers, and intermediate for middle hatchers ( Table 2 ). This finding is in agreement with the studies of Lamot et al (2014) and Özlü et al. (2018) who also found that earlier hatching chicks were lighter than later hatchers.…”

Section: Resultssupporting

confidence: 93%

“…Chicks from the late HWP had lower ( P = 0.012) yolk-free BW (79.92 g) and higher ( P = 0.025) relative yolk weight (2.65%) compared to those from the early HWP (85.33 g and 2.17%, respectively), while middle HWP was intermediate. Similar observations were made by Özlü et. al.…”

Section: Resultssupporting

confidence: 91%

“…However, compensatory growth of early hatching chicks, independent of feed and water access in the hatcher, diminished this initial benefit of hatchery feeding when chicks of different HWP were comingled during rearing, as would be the case in commercial production. These results agree with previous reports on the ability of early hatching, lighter weight chicks to compensate and achieve equal market-age BW as later hatching chicks in the absence of hatcher feeding ( Lamot et al., 2014 ; Özlü et al., 2018 ). Therefore, to better understand the relationship between moment of hatch and early feed access, the current experiment was conducted to examine the effects of hatcher feeding on performance and processing yields of chicks reared according to their period of hatch within the hatch window.…”

Section: Introductionsupporting

confidence: 93%

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Effects of hatch window and nutrient access in the hatcher on performance and processing yield of broiler chicks reared according to time of hatch

et al. 2021

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The effects of hatch window and hatching basket nutrient availability on organ weights, performance, and processing yield of broilers were investigated. Eggs were hatched in illuminated hatchers. At the end of each hatch window period ( HWP ), hatched chicks were placed into control ( CTL ) hatching baskets with no nutrients or baskets providing access to feed and water ( FAW ). This resulted in 6 treatments in a factorial arrangement of 3 HWP (early, middle, or late) and 2 basket types (CTL or FAW). Chicks remained in experimental baskets until 504 h and were then subjected to a 4 h holding period at the hatchery without nutrient access. Subsequently, 1,500 hatched chicks were reared in floor pens for 42 d with 5 replicate pens per treatment. Common diets and water were provided ad libitum. Bird weights and feed consumption were recorded weekly. Individual bird weights were taken at 21 and 42 d. At 43 d, 14 males from each pen were processed. There was an interaction between HWP and basket type on placement BW ( P = 0.028) and BW change in the hatcher ( P < 0.001). The HWP influenced BW at hatch ( P = 0.007), 7 d ( P < 0.001), and 14 d ( P < 0.001) and FI at 7 d ( P < 0.001) and 14 d ( P = 0.002). Chicks from FAW baskets were heavier ( P < 0.001) than those from CTL baskets at 7 d; afterward, they were similar ( P > 0.05) in BW. Yolk and liver weights were similar ( P > 0.05) between basket treatments at 3 d posthatch. No differences ( P > 0.05) in FCR, mortality, or processing were observed between basket treatments. Interestingly, early hatching chicks were lightest at hatch but subsequently had higher FI and BWG. These findings indicate that hatcher nutrient access may reduce weight loss in the hatcher, especially for early hatching chicks, but had no influence on subsequent performance or processing yields beyond 7 d.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 91%

Section: Introductionsupporting

confidence: 93%

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Effects of hatch window and nutrient access in the hatcher on performance and processing yield of broiler chicks reared according to time of hatch

et al. 2021

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“…Furthermore, chicks being held in the hatcher for an extended period of time can lead to dehydration, diminished yolk sac reserves ( Hager and Beane, 1983 ), reduced BW ( Hager and Beane, 1983 ; Wyatt et al., 1985 ), and increased mortality before and after placement ( Misra and Fanguy, 1978 ). Reduced growth and increased early mortality in chicks held without access to feed and water were associated with dehydration and a shortage of available energy ( Vieira and Moran, 1999b ), but holding chicks in the hatcher for 24 h has been reported to not clinically dehydrate chicks or affect live performance ( Casteel et al., 1994 ; Joseph and Moran, 2005 ; Almeida et al., 2006 ; Lamot et al., 2014 ; Özlü et al., 2018 ). Work with respect to posthatch holding has often varied in that chicks were placed at or later than 24 h apart, but they were subsequently weighed on the same day in some experiments ( Fanguy et al., 1980 ; Hager and Beane, 1983 ; Wyatt et al., 1985 ; Pinchasov and Noy, 1993 ; Vieira and Moran, 1999a ) or on the basis of days on feed in other studies ( Careghi et al., 2005 ; Almeida et al., 2006 ; Lamot et al., 2014 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of posthatch feed and water access time on residual yolk and broiler live performance

Özlü

Uçar

Romanini³

et al. 2020

Poultry Science

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This study investigated the effect of feed and water access time on yolk sac utilization and subsequent broiler live performance. Hatching eggs were collected from commercial flocks of Ross 308 breeders at 35 and 39 wk of age in experiments 1 and 2, respectively. Chicks already out of their shells that still had some dampness on their down were removed, recorded, feather-sexed, and weighed at 488 h of incubation in both experiments. Chicks were weighed individually and received feed and water at 2 (immediate feed; IF ), 8, 12, 16, 20, 24, 28, and 32 h after hatching (488 h) in experiments 1 and 2 (IF) and at 24, 26, 28, 32, 36, and 40 h after hatching in experiment 2. The residual yolk sac weight was determined at 32 and 40 h after hatching (day 0) in all groups in experiments 1 and 2, respectively. Feed consumption and BW were recorded at 7, 14, 21, and 35 d and at the same age relative to placement on feed and water at the end of the growing period. Mortality was recorded twice daily in both experiments. Feed and water access time did not influence yolk sac utilization in either experiment ( P > 0.05). The IF group exhibited a higher ( P < 0.05) BW than those that received feed at or after 28 h at 35 d in both experiments. There was a significant increase in feed consumption in the IF group compared with the groups with access to feed and water after 24 h at 35 d in experiment 2 ( P < 0.05), with a similar trend in experiment 1 ( P > 0.05). There were no significant differences in the feed conversion ratio ( FCR ) or mortality at 35 d of age, but the IF group tended to have a poorer FCR than the other groups in both experiments. When the total feed and water times were equalized among all groups, irrespective of the deprivation duration, there were no significant differences among the groups in the BW, feed consumption, the FCR, or mortality in both experiments. It can be concluded that feed and water deprivation for 28 h or longer after hatching (≥28 h) negatively affects the final BW but tends to improve the FCR at 35 d of age compared with chicks that receive feed immediately (2 h after hatching). When the feeding period was equalized in all groups, feed and water deprivation up to 40 h under optimum conditions had no detrimental effect on final live performance. These results suggest that the total feeding period is more critical for broiler performance than the time of posthatch access to feed and water.

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“…Previous studies reported that prolonged storage resulted in an increase in the incubation time ( Elibol et al., 2002 ; Reijrink et al., 2010 ; Dymond et al., 2013 ) and that egg storage caused some live chicks to be rejected only because they hatched later ( Nicholson, 2012 ). In addition, chick quality and broiler live performance were reduced in late-hatched chicks compared with early- and middle-hatched chicks ( Özlü et al., 2018b ). Therefore, the overall results of the present study indicate that higher prewarming temperatures could be used as a method to decrease late-hatching chicks and improve overall chick quality in eggs stored for a long period.…”

Section: Resultsmentioning

confidence: 99%

Research Note: Storage period and prewarming temperature effects on synchronous egg hatching from broiler breeder flocks during the early laying period

Özlü

2021

Poultry Science

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The effects of the storage period and prewarming temperature on embryonic mortality, hatchability, and synchronous hatching of broiler eggs were investigated. Eggs were obtained from commercial flocks of Ross 308 broiler breeders at 27 and 28 wk of age for trials 1 and 2, respectively. In both trials, 2,400 eggs were stored for 4 d (short) or 11 d (long) at 18°C (64.4°F) and 75% RH and were randomly assigned to 2 groups at either a prewarming temperature of 26.1°C (79°F, low) or 29.4°C (85°F, high) for 8 h before setting. The eggs were transferred from setters to hatching baskets at 444 h (18.5 d) of incubation. The hatched chicks were counted at 6-h intervals between 468 h and 516 h of incubation and categorized as early, middle, or late hatching. The eggs stored for 4 d hatched earlier than the eggs stored for 11 d ( P < 0.05). An increased prewarming temperature (29.4°C) resulted in a 1.0-h shorter incubation duration, but this difference was not significant ( P = 0.064). An interaction between the storage period and prewarming temperature was observed for middle- and late-hatched chicks ( P < 0.05). No interactions between the storage period and prewarming temperature were observed for hatchability of fertile eggs or embryonic mortality; however, a significant interaction was found between the storage period and prewarming temperature on the second-quality chick percentage ( P < 0.05). The eggs stored for 11 d had a significantly reduced hatchability of fertile eggs owing to increased embryonic mortality than short-stored eggs ( P < 0.05). The interaction effect indicated that eggs held for 8 h with prewarming at 29.4°C after 11 d of storage had more middle- and fewer late-hatched chicks and improved chick quality than those that received the 26.1°C prewarming treatment ( P < 0.05), but no significant difference was found among the prewarming treatments for eggs stored for 4 d. This study demonstrated that prolonged egg storage resulted in reduced hatchability, increased incubation duration, and an asynchronous hatching time. Moreover, increasing the prewarming temperature could be used to promote uniformity among embryos through synchronous hatching, thus improving broiler flock uniformity and performance of the prolonged stored eggs.

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Effect of Hatching Time on Yolk Sac Percentage and Broiler Live Performance

Cited by 16 publications

References 30 publications

Effects of hatch window and nutrient access in the hatcher on performance and processing yield of broiler chicks reared according to time of hatch

Effects of hatch window and nutrient access in the hatcher on performance and processing yield of broiler chicks reared according to time of hatch

Effect of posthatch feed and water access time on residual yolk and broiler live performance

Research Note: Storage period and prewarming temperature effects on synchronous egg hatching from broiler breeder flocks during the early laying period

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