Development of shape in turkey carcasses

Swatland, H. J.

doi:10.1017/s0021859600086056

Cited by 9 publications

(9 citation statements)

References 4 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In turkeys, for example, the ratios for gastrocnemius, semitendinosus, and biceps brachii muscles are .85, .91, and .98 (Swatland, 1979) so that proportional gains made in the breast muscles are only slightly diminished in these other muscles. The corresponding ratios for ducks drop as low as .28 (Table 2).…”

Section: Discussionmentioning

confidence: 99%

Development of Carcass Shape in Pekin and Muscovy Ducks

Swatland

1980

Poultry Science

View full text Add to dashboard Cite

Male and female White Muscovy and White Pekin ducks were killed at weekly intervals from hatching to 10 weeks. Their carcasses were dissected and lengths of skeletal units and weights of representative muscles were recorded. Data were analysed for allometric (proportional) growth relative to keel length or unilateral breast muscle weight using Huxley's allometric growth equation. Wing bones tended to grow proportionally faster than keel length; this was most evident in Muscovies, possibly because of their greater powers of flight. Skull and leg bones grew proportionally more slowly than keel length. Biceps brachii, semitendinosus, and gastrocnemius muscles grew proportionally more slowly than breast muscles. The existing pattern of allometric growth in duck carcasses suggests that the response of total muscle mass to selection for increased breast muscle mass will be greater in Muscovies relative to Pekins with similar breast improvement. (

show abstract

Section: Discussionmentioning

confidence: 99%

Development of Carcass Shape in Pekin and Muscovy Ducks

Swatland

1980

Poultry Science

View full text Add to dashboard Cite

show abstract

“…The weight of the birds were recorded at hatching (VI) and at slaughter (V2) permitting the calculation of weight gain (V3). Prior to killing, the following measurements were taken: breast width (V4), breast length (V5) and breast circumference (V6), as described by SWATLAND (1979). The birds were killed by severing the carotid artery and jugular veins.…”

Section: Methodsmentioning

confidence: 99%

Effects of genetic control of subcutaneous fat deposition via using restricted selection indexes on live Performance and carcass characteristics of Pekin ducklings

et al. 2000

View full text Add to dashboard Cite

Abstract. Estimates of phenotypic and genetic parameters for live Performance and detaiied dissection traits of body components and carcass tissues in Pekin ducks were calculated and used to construct selection indexes. The expected reduction in potential gain in live weight, dressing percentage and carcass characteristics resulting from restricting change in subcutaneous fat level to zero were assessed. The aggregate genotype measurements were weight at slaughter, dressing percentage and percent subcutaneous fat. The index measurements were weight at hatching, weight at slaughter, weight gain, breast width, breast length and breast circumference. The restricted indexes as compared with the unrestricted would lead to minimum reduction in potential gain of 29.4% in total net merit, 96.4% in weight at slaughter, 49.0% in dressing percentage, 74.0% in dissected side weight and 75.0% in muscle to bone ratio. The potential reduction in percent abdominal fat and percent bone in side was decreased by at least 38.5% and 80.2%, respectively. Absolute genetic response results showed that selecting for breast width alone (rTI = 0.79) would be recommended for birds with substandard levels of SCF, whereas use of the restricted index containing weight at hatching and breast width (rTI = 0.54) would be advised for individuals with Standard fatness.

show abstract

“…The market value of the carcass included meat, skin, and trimming yields. However as the allometric growth pattern for the breast is primarily due to muscle development (Swatland 1979(Swatland , 1989b total breast yield was calculated by adding constant skin and trimming yield values as a percentage of the carcass weight, to the meat yield at a specific weight. Fixed production variables and costs used to calculate margin are shown in Tables 1 and 2, respectively.…”

Section: Model Developmentmentioning

confidence: 99%

Determination of the optimum slaughter weight to maximize gross profit in a turkey production system

Case¹,

Miller²,

Wood³

2010

Can. J. Anim. Sci.

View full text Add to dashboard Cite

Case, L. A., Miller, S. P. and Wood, B. J. 2010. Determination of the optimum slaughter weight to maximize gross profit in a turkey production system. Can. J. Anim Sci. 90: 349Á356. A deterministic model was used to optimize turkey slaughter weight based on a profit equation that described the commercial grower and processing divisions of an integrated company. The objective was to determine optimum slaughter weights for toms and hens using both a heavy and super heavy strain, to maximize gross margin of the system. Sensitivity of optimum slaughter weight in response to feed cost and breast meat price was also considered. Higher margins could be achieved with toms and super heavy strain birds. This indicated that larger birds, from a heavier weight strain or toms within a strain, could be more efficient and profitable given the assumed production values. Results were based on the assumed market conditions, and changes in the costs or turkey component values (i.e., breast meat) could result in a shift in the optimal turkey strain to use. Increased feed cost results in a lower optimum slaughter weight and decreased margin. Optimum slaughter weight and profit increased with higher breast meat values. Increasing the profit of an integrated company can be accomplished by targeting slaughter to an optimum weight.Key words: Turkey, body weight, production efficiency, breast meat, feed efficiency Case, L. A., Miller, S. P. et Wood, B. J. 2010. De´termination du poids optimal d'abattage pour maximiser le profit brut d'un e´levage de dindons. Can. J. Anim Sci. 90: 349Á356. Les auteurs ont recouru a`un mode`le de´terministe pour optimiser le poids d'abattage des dindons graˆce a`une e´quation de rentabilite´de´crivant les services de production et de transformation d'une entreprise inte´gre´e. L'objectif consistait a`e´tablir le poids ide´al des dindons et des dindes al 'abattage en recourant a`une race lourde et a`une race super lourde, de manie`re a`maximiser la marge de profit brut du syste`me. Les auteurs ont aussi tenu compte de la sensibilite´du poids optimal d'abattage par rapport au couˆt des aliments et au prix de la chair de poitrine. Les dindons et les spe´cimens de la race super lourde accroissent la marge de profit. En d'autres termes, les oiseaux de plus grande taille d'une race lourde ou les dindons d'une race quelconque sont plus rentables et rapportent davantage aux valeurs de production pre´sume´es. Les re´sultats s'appuient sur les conditions hypothe´tiques du marche´, et la fluctuation des couˆts ou de la valeur du dindon (a`savoir, prix de la viande de poitrine) peuvent modifier la race ide´ale a`e´lever. Ainsi une majoration du couˆt des aliments re´duit le poids optimal d'abattage et re´tre´cit la marge be´ne´ficiaire. En revanche, on note une hausse du poids optimal d'abattage et des profits quand la valeur de la chair de poitrine augmente. Une entreprise inte´gre´e pourrait hausser ses be´ne´fices en visant l'abattage des oiseaux a`un poids optimal.

show abstract

Development of shape in turkey carcasses

Cited by 9 publications

References 4 publications

Development of Carcass Shape in Pekin and Muscovy Ducks

Development of Carcass Shape in Pekin and Muscovy Ducks

Effects of genetic control of subcutaneous fat deposition via using restricted selection indexes on live Performance and carcass characteristics of Pekin ducklings

Determination of the optimum slaughter weight to maximize gross profit in a turkey production system

Contact Info

Product

Resources

About