Age-related Changes in the Percentage Content of Edible and Non-edible Components in Broiler Chickens

The aim of the study was to determine body weight and dimensions, body conformation, length of the esophagus, length of intestine and its segments, as well as weight of internal organs and their proportions relative the body weight of broiler chickens from three commercial lines -Ross 308, Hubbard Flex and Hubbard F15. At the age of 42 days, Ross 308 chickens had significantly (p≤0.05) shorter trunk, but greater chest circumference and compactness index, as well as shorter esophagus and longer large intestine compared with Hubbard F15. The longest large and total intestine was found in Ross 308 broilers. Chicken genotype had no significant effect on the percentage of the main internal organs, i.e. liver, heart, proventriculus, gizzard, and spleen. In the analyzed broilers, the coefficients of correlation between body weight and dimensions and the length of the esophagus, small intestine, caeca and large intestine were low and not significant. This study provides information relevant to breeding practice, including that the development of internal organs in broiler chickens raised under intensive conditions has an effect on their meat characteristics.

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“…days of age in our study were considerably lighter than Ross 308 chickens of the same age investigated by Murawska et al (2011).…”

Section: Body Conformation and Internal Organs Characteristics Of Difmentioning

confidence: 64%

Body Conformation and Internal Organs Characteristics of Different Commercial Broiler Lines

Kokoszyński

Bernacki

Saleh

et al. 2017

Rev. Bras. Cienc. Avic.

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“…In an earlier study (Abdel-Azeem, 2010) with 35-day-old Japanese quail, both males and females had greater liver weight (4.94 and 5.88 g, respectively) compared to our study. Murawska et al (2011), who analysed age-related changes in percentage of edible and non-edible carcass components of broiler chickens, found that the liver grew rapidly to 8 weeks of age. The weight of gizzard (Table 6) in the analysed birds was similar on both evaluation dates (2.9 g in younger birds and 3.0 g in older birds).…”

Section: Resultsmentioning

confidence: 99%

Body conformation and morphometry of some internal organs of Pharaoh quail of different ages

Wilkanowska¹,

Kokoszyński²,

Cieslinska³

2013

j. cent. eur. agric.

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The effect of age of Pharaoh quail on body weight, body conformation and development of internal organs, including the digestive tract, was determined. At the age of 35 days, Pharaoh quail were characterized by significantly lower body weight, length of trunk with neck, and length of trunk compared to 45-day-old birds. Younger quail had slightly shorter breast bone and lower thighs, smaller chest girth, and the same length of shanks. Body conformation indices were significantly (P0.05) higher in 35-day-old birds. Pharaoh quail, evaluated at 35 and 45 days of age, did not differ significantly in the length of the oesophagus and crop, the length of intestine and its segments, and the weight and proportion of gizzard, proventriculus and heart. As birds aged, liver weight increased significantly, as did the weight and proportion of testicles in males.Keywords: Pharaoh quail, age, body weight, digestive tract Streszczenie Określono wpływ wieku przepiórek Faraon na masę i ukształtowanie ciała, rozwój narządów wewnętrznych, w tym przewodu pokarmowego. Przepiórki Faraon w wieku 35 dni cechowały się istotnie mniejszymi: masą ciała, długością tułowia z szyją i długością tułowia w stosunku do 45-dniowych ptaków. Młodsze przepiórki miały nieznaczne krótszy mostek, podudzia, mniejszy obwód klatki piersiowej i taką samą długość skoków. Indeksy ukształtowania ciała były istotnie (P0,05) większe u ptaków 35-dniowych. Oceniane przepiórki w wieku 35 i 45 dni nie różniły się statystycznie istotnie pod względem długości przełyku z wolem, długości jelita i jego segmentów oraz masy i udziału żołądka mięśniowego, żołądka gruczołowego i serca. Z wiekiem ptaków nastąpiło istotne zwiększenie masy wątroby, a u samców także masy i udziału jader. Journal of Central European Agriculture, 2013, 14(2), p.358-368 358 Journal of Central European Agriculture, 2013, 14(2), p.358-368 358 Journal of Central European Agriculture, 2013, 14(2), p.358-368 DOI: 10.5513/JCEA01/14.2.1273 836 Journal of Central European Agriculture, 2013, 14(2), p.836-846 DOI: 10.5513/JCEA01/14.2.1273 2 Detailed abstractBadania przeprowadzono na 28 przepiórkach mięsnych Faraon. W wieku 35 i 45 dni wybrano po 14 osobników o masie ciała zbliżonej do średniej populacji liczącej początkowo 90 sztuk. Przez cały okres badań (45 dni) ptaki przebywały w pomieszczeniu zamkniętym o regulowanych parametrach środowiska. Przepiórki żywiono ad libitum przemysłowymi mieszankami paszowymi. W 35. i 45. dniu ptaki zważono, a następnie zmierzono: długość tułowia z szyją, długość tułowia, długość grzebienia mostka, obwód klatki piersiowej, długość podudzia oraz długość skoku. Po przeprowadzonym uboju, odpierzaniu i patroszeniu wyodrębniono przewód pokarmowy i inne ważniejsze organy i narządy wewnętrzne. Przy użyciu taśmy mierniczej wykonano pomiary długości przełyku z wolem, jelita cienkiego, obu jelit ślepych, jelita końcowego, natomiast za pomocą wagi Medicat 160M określono masę wątroby, serca, żołądka mięśniowego, żołądka gruczołowego, a u samców dodatkowo jąder. Na podstawie uzys...

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“…Murawska et al (2011) observed the influence of chicken age and the percentage content of giblets. They found a relationship between increased muscle tissue weights and decreased giblet contents.…”

Section: Discussionmentioning

confidence: 99%

Comparison of qualitative and quantitative properties of the wings, necks and offal of chicken broilers from organic and conventional production systems

Abdullah¹,

Buchtová²

2016

Vet. Med. - Czech

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ABSTRACT:The aim of the present study was to investigate qualitative and quantitative properties of wings, offal (liver, heart and gizzard) and necks of chickens from organic and conventional production systems, currently available on the market for Czech consumers. Production properties (yield and weight), surface colour (lightness, redness, yellowness) and chemical indicators (dry matter, total protein, net protein, collagen, hydroxyproline, fat, ash and phosphorus) were evaluated in fresh chicken broilers. Conventionally produced chickens had higher carcass yields but higher wing yields and weights were observed in organic broilers. The skin, bones, tip (left wings) and the meat with skin (right wings) of organic broilers were heavier (P < 0.05) than those of conventional chickens. The dry matter and total protein content of deboned organic broiler wings (meat with skin) was greater (P < 0.01) than those of conventional wings. Similarly as for yields, the offal (heart, gizzard) and necks of organic chickens had significantly (P < 0.01) higher weights in comparison with conventional chickens. Colour indicators showed that the external surface of the livers, necks and gizzards (muscle) from organic chickens were darker (lightness; P < 0.01). Total protein content in livers, hearts and necks of organic chickens was greater; fat content in the livers and necks of organic broilers was also higher (P < 0.05) than those of conventional broilers. The ash and phosphorus in the necks of conventional broilers was higher (P < 0.05) than in organic chickens. This study indicates that the quantity and quality of offal and neck from organic broilers are slightly superior compared to conventional chickens.

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Age-related Changes in the Percentage Content of Edible and Non-edible Components in Broiler Chickens

Cited by 26 publications

References 19 publications

Body Conformation and Internal Organs Characteristics of Different Commercial Broiler Lines

Body Conformation and Internal Organs Characteristics of Different Commercial Broiler Lines

Body conformation and morphometry of some internal organs of Pharaoh quail of different ages

Comparison of qualitative and quantitative properties of the wings, necks and offal of chicken broilers from organic and conventional production systems

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