Body Weight Changes During the Reproductive Period in Four Strains of Turkey Hens

Bacon, Wayne L.; Nestor, Karl E.

doi:10.3382/ps.0610575

Cited by 13 publications

(4 citation statements)

References 20 publications

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“…This has been noted previously by Bacon and Nestor (1982) and Siopes (1984). For example, B hens had the same absolute weight (Table 1) as H but less than N yet produced more eggs per hen than either.…”

Section: Days Of Ovipositionsupporting

confidence: 56%

“…ously, but Bacon and Nestor (1982) reported that greatly different strains of noncommercial turkey hens have the same pattern of change in absolute BW during the lst-yr of lay. It has been amply noted that BW changes occur (up or down) during the first and second lay periods in turkey hens and that there exists an inverse relation of BW to environmental temperature .…”

Section: Days Of Ovipositionmentioning

confidence: 96%

“…This includes effects on egg traits Strong and Nestor, 1980;Christensen et al, 1991), body weight Christensen et al, 1991), egg production (Friars et al, 1963;Andrews, 1977;Bacon and Nestor, 1982;Christensen et al, 1991), ovarian development (Bacon et al, 1972;Nestor et al, 1981), and hatchability Friars et al, 1963;Christensen et al, 1991). It is also generally accepted that breeder hen performance varies by season Siopes, 1992) and age (Siopes, 1984;Siopes and Pyrzak, 1990).…”

Section: Introductionmentioning

confidence: 98%

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Turkey Breeder Hen Performance by Strain During Consecutive Lay Periods

Siopes

1995

Poultry Science

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The results of this study provide information about reproductive performance among commercially available strains of Large White Turkey breeder hens, Nicholas (N), British United (B), and Hybrid (H). The hens were managed identically through two consecutive lay periods, summer-fall (1st-yr) followed by winter-spring (recycled). Effects of the intensity (351 vs 24 lx) of supplemental light were evaluated during the 1st-yr lay period. Data were collected for onset of oviposition, egg production, BW, feed consumption, livability, egg weight, and egg components. Light intensity had similar effects on all variables measured. There were neither strain differences nor genetic interactions with light intensity treatment. There was no difference in livability among strains (P = .20) or between year of lay (P = .08), and there was no strain by year interaction. Body weight differed by strains and year and there was a significant strain by year interaction. In general, N were heavier than H or B in the 1st-yr and early recycle lay period, whereas H and B were similar in BW in both lay periods. Recycled hens of all strains were heavier than 1st-yr hens. The onset of lay was earlier in H than B or N in both lay periods and all three strains had a delay in onset of lay after recycling. Through 23 wk photostimulation the B hens produced more eggs per hen than N or H hens (B > N > H) and recycled hens produced more eggs per hen than 1st-yr hens. Strain, year, and strain by year interaction effects were significant for egg weight. The first eggs laid, as well as subsequent eggs in both lay periods, were heaviest in N hens. In all strains, percentage yolk increased and albumen decreased with time in lay. However, N hens had a smaller percentage yolk and greater albumen than H or B hens. The mean percentage shell was greatest in H hens.

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Section: Days Of Ovipositionsupporting

confidence: 56%

Section: Days Of Ovipositionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 98%

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Turkey Breeder Hen Performance by Strain During Consecutive Lay Periods

Siopes

1995

Poultry Science

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“…First cycle turkey hens fed ad libitum have been reported to either lose or gain body weight depending on environmental changes, with high environmental temperatures associated witii body weight loss and poor egg production and low environmental temperature associated witii body weight gain during the egg production period (Bacon and Nestor, 1982). Robel (1984) reported a decline in body weight for Large and Small White turkey breeder hens kept in floor pens or cages for a 23-wk egg production period.…”

Section: Discussionmentioning

confidence: 98%

Effect of Different Protein Levels Fed During the Prebreeder Period on Performance of Turkey Breeder Hens

et al. 1989

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An experiment was conducted to examine the effects of prebreeder protein intake on subsequent reproductive performance and to examine body weight, feed consumption, and body composition changes due to aging in Large White turkey breeder hens. One hundred twenty-nine Hybrid Large White turkey breeder hens were fed either 12, 15, or 18% CP diets (2,882 kcal ME/kg) during the prebreeder period from 24 to 32 wk of age. All hens were photostimulated with 15.5 h light/day and fed a standard 16% protein breeder ration from 32 to 55 wk of age. Prebreeder protein intake increased linearly as dietary protein increased. Treatments did not affect body weight, body composition, egg production, feed consumption, fertility, hatch of fertile eggs, or percentages of early or late dead. Body weight increased from 24 to 55 wk in a cubic response to age. Percentage of carcass moisture decreased, whereas percentage of carcass fat increased from 24 to 55 wk in a quadratic response to age. Prebreeder and breeder feed consumption were not significantly affected by treatment or age. This experiment is evidence that a 12% protein prebreeder ration is adequate for subsequent reproductive performance; observed effects of age on body characteristics agree with published data.

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Effect of Physical Feed Restriction During Rearing on Large White Turkey Breeder Hens: 2. Reproductive Performance

Crouch¹,

Grimes

Christensen

et al. 2002

Poultry Science

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Large White turkey breeder hens were used to evaluate the effect of three different levels of physical feed restriction on subsequent reproductive performance. The feed treatments were: 1) fed ad libitum throughout the study (CC), 2) feed-restricted from 16 to 24 wk (CR), 3) feed-restricted from 3 to 16 wk (RC), and 4) feed-restricted from 3 to 24 wk (RR). Feed restriction was implemented so that restricted-fed hens (RC and RR) achieved a 45% reduction in BW as compared to CC hens at 16 wk. From 16 to 24 wk, feed was allotted to RR and CR hens to maintain a slight increase in BW. At the completion of the respective restriction periods, hens were gradually returned to ad libitum feeding. At 30 wk of age, hens were photostimulated for a 20-wk summer season egg production cycle. Hens receiving RC and RR treatments laid significantly more eggs than did CC and CR hens for the first 5 wk of lay. However, once the house temperature increased to 26.7 to 29.4 C during 6 to 10 wk of lay, egg production of all hens decreased, resulting in a significant decrease in cumulative egg production for RR and RC hens compared to CC and CR hens. Egg and poult weights were less for RC and RR hens compared to those from CC and CR hens. In conclusion, age of breeder, season of implementation, and length of physical feed restriction have significant effects on the reproductive performance of turkey breeder hens.

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Body Weight Changes During the Reproductive Period in Four Strains of Turkey Hens

Cited by 13 publications

References 20 publications

Turkey Breeder Hen Performance by Strain During Consecutive Lay Periods

Turkey Breeder Hen Performance by Strain During Consecutive Lay Periods

Effect of Different Protein Levels Fed During the Prebreeder Period on Performance of Turkey Breeder Hens

Effect of Physical Feed Restriction During Rearing on Large White Turkey Breeder Hens: 2. Reproductive Performance

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