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Morphological Analysis of Breast and Thigh Muscles in Different Postnatal Ages of Broiler Chicken and Its Carcass Characteristics

MS Rahman
Department of Anatomy and Histology, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Bangladesh

Abstract/ Executive Summary:

The aim of this experiment was to analyze the morphology of muscles and carcass quality Cobb-500 and Ross broiler chicken at different age, where the weight of live bird, carcass, major cut portions, lean and bone were measured. The average highest live weight at D₃₅ was recorded as 1860.18±6.29g in Cobb-500 and 1640.47±7.57g in Ross broiler chicken. The average carcasses weights at D₁, D₇, D₁₄, D₂₁, D₂₈ and D₃₅ were recorded as 14.90 ±0.53g, 27.85±0.30g, 85.31±0.82g, 211.94±4.31g, 618.36 ±0.92g and 1289.05±5.39g for Cobb-500 and in case of Ross strains 12.89±0.41g, 25.83±0.38g, 82.09±0.35g, 210.58±2.66g, 565.55±2.41g and 1133.80±3.51g respectively. Highest dressing percentage was recorded at D₃₅ which was 69.29±0.11g in Cobb-500 and 69.12±0.12g in Ross strains. The length, breadth, thickness and weight of pectoralis thoracis, supracoracoideus, iliotibialis lateralis and iliotibialis cranialis skeletal muscles were higher in Cobb-500 at every studied ages. Finally the experiment focused that Cobb-500 chicken is superior in terms of meat production for its unique skeletal muscle growth and carcass yield.

Keywords: Morphology, Muscle, Carcass yield, Cobb-500, Ross chicken

Location: Anatomy and Histology laboratory of Hajee Mohammad Danesh Science and Technology University, Dinajpur.

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Chicken

Objectives:

To small scale farm holders as to which strains of broiler chicken should be used for more profit, eventually resulting in an up scaling of the meat production.

Methodology:

A total of 288 live birds of both strains were randomly collected from 16 different small scale broiler farm of Dinajpur, Rangpur and Nilphamari districts at 1^st, 7^th, 14^th, 21^st, 28^th, and 35^th day of age. These biological samples were carried to the Anatomy and Histology laboratory of Hajee Mohammad Danesh Science and Technology University, Dinajpur. After recording the live weight the birds were allowed to slaughter through ventral neck cutting at about ¾ diameter of the neck by using sharp knife. 5 - 6 minutes were allowed for proper bleeding. After removal of feather and skin subcutaneous fat was collected with the help of forceps and scalpel blade. Then eviscerated carcass was weighed. The major edible cut portions (breast, thighs and drumsticks) were separated and weighed. Total lean and total bone were collected and measured. The length, breadth, thickness and weight of m. pectoralis thoracis and m. supracoracoideus from breast, m. iliotibials lateralis and m . iliotibialis cranialis from thigh were measured. The morphometric study of the selected parameters was performed by using scale (cm and mm) and electric balance.

Source of Information: Bangladesh Journal of Veterinary Medicine, Vol 12, No. 2 (2014): 115-120

Article Link (Online Journal): http://www.banglajol.info/index.php/BJVM/article/view/21265/14594

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This study concludes that strain selection and age of the bird are two significant criteria in commercial broiler farming system. Muscular growth and meat yield are very important to evaluate the total production and profitability of the farm. Cobb-500 strain has a higher skeletal muscle growth and meat yield than those of Ross strain. Therefore Cobb-500 may be the first choice for better meat production and profit through broiler farming in Bangladesh.

Knowledge Management: Journal