Effects of caponization on growth performance, carcass composition and meat quality of males of a layer line

Symeon, George; Mantis, F.; Bizelis, Iosif; Kominakis, A.; Rogdakis, E.

doi:10.1017/s1751731112001024

Cited by 38 publications

(27 citation statements)

References 23 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lin and Hsu (2013) shown that moisture and ash contents were lower in capon (caponised with 10 weeks) of native Taiwan Country chicken with 28 weeks of age. Miguel et al (2008), Symeon et al (2012) and Lin and Hsu (2013), confirming that caponisation (early and traditional and slaughter between 26 and 34 weeks) increased IMF content in breast, same resulted was observed in present study (18 weeks). Nevertheless, Volk et al (2011) andCalik et al (2015) have found no differences in IMF content of breast between cocks and capons, castrated at 8 weeks and slaughtered at 24 weeks of age.…”

Section: Meat Physical and Chemical Characteristicssupporting

confidence: 89%

“…Caponisation is surgical removal of the testicles of male chickens before reaching sexual maturity (Sirri et al, 2009) between 8 and 10 weeks of age. Removal of the testes produces a change in the animal's metabolism that affect the growth (Symeon et al, 2012), behaviour, tissue composition, carcass composition (Miguel et al, 2008), chemical composition and organoleptic quality of meat (Miguel et al, 2008;Sirri et al, 2009;Lin and Hsu, 2013), lipid content and fatty acid profile (Tor et al, 2005). Because of the resultant androgen deficiency, male secondary sexual characters including the comb, wattle, fighting behaviour, vocalisation degenerate and maturity regresses to an immature stage (Chen et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of caponisation on physicochemical and sensory characteristics of chickens

Amorim

Rodrigues

Pereira

et al. 2016

Animal

View full text Add to dashboard Cite

The meat fats content associated to nutritional and sensory characteristics are the most important concerns of consumers. To study the effect of caponisation on the meat quality of two different breed chickens, slaughtered at 18 weeks of age, raised under the same conditions, the physicochemical and sensory characteristics of capons (castrated males at 8 weeks of age) and roosters' meat of native Amarela Portuguesa and native Pedrês Portuguesa breeds were evaluated. Forty Amarela (20 roosters and 20 capons), 40 Pedrês (20 roosters and 20 capons) chickens, and also, six free-range chicken and six broilers were evaluated. The pH, waterholding capacity, Warner-Bratzler shear force, moisture content, ash, myoglobin, collagen, CP, total fat and fatty acids profile were evaluated in breast and leg meat, according to standard procedures. Leg meat capon showed greater intramuscular fat content ( P ⩽ 0.05), monounsaturated fatty acids (MUFA) and CP ( P ⩽ 0.001) than leg roosters. Caponisation increased the content of myoglobin and MUFA ( P ⩽ 0.05) and reduced the moisture content in the leg ( P ⩽ 0.05). The main fatty acids found were oleic acid (C18:1), palmitic acid (C16:0) and linoleic acid (C18:2). The greatest value of C18:1 was observed in capon's breast ( P ⩽ 0.01). Sensory analysis was made to compare the Amarela and Pedrês meat with a free-range chicken and a broiler. The sensory taste panel classified the capon's meat (Amarela and Pedrês) as juicier, less fibrous and tougher than rooster's meat. The broiler was in general juicier, tenderer and less fibrous than the other birds. The results of sensory analysis complement those obtained in physicochemical analysis, suggesting that caponisation promotes an overall improvement in meat quality.

show abstract

Section: Meat Physical and Chemical Characteristicssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Effect of caponisation on physicochemical and sensory characteristics of chickens

Amorim

Rodrigues

Pereira

et al. 2016

Animal

View full text Add to dashboard Cite

show abstract

“…The significantly heavier breast muscle weight observed could be attributed to longer keel length, as keel length has been reported to be significantly positively correlated with the weight of breast muscle (Johnson and Asmundson 1957). Moreover, our results showed that the percent weights of the gizzard and liver were not affected by caponization, while the percent weights of the heart and leg muscle were reduced, which is in agreement with the findings of Symeon et al (2012).…”

Section: Discussionsupporting

confidence: 91%

“…In contrast, Miguel et al (2008) in their study on Castellana Negra chicken found that the body weight of castrated and uncastrated birds did not differ at 29 weeks; this result was supported by Symeon et al (2012) in their study on Lohmann chicken. Another contrasting finding was reported by Cason et al (1988), according to whom the live weight of capons was lower than that of intact males.…”

Section: Discussionmentioning

confidence: 86%

“…Surgical removal of the testes affects chicken growth (Cason et al 1988;Lin and Hsu 2002;Symeon et al 2012), carcass composition (Tor et al 2002;Miguel et al 2008), meat quality (Miguel et al 2008;Sirri et al 2009), abdominal adipose tissue lipid content, and fatty acid profile (Sinanoglou et al 2011). However, the reported effects of caponization on these traits are not completely consistent.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of caponization on growth, carcass, and meat characteristics and the mRNA expression of genes related to lipid metabolism in roosters of a Chinese indigenous breed

Guo¹,

Nan²,

Shi³

et al. 2015

Czech J. Anim. Sci.

View full text Add to dashboard Cite

ABSTRACT:The effects of caponization on growth, body measurements, carcass traits, meat quality, and the mRNA expression of three genes related to lipid metabolism in Guang-xi Yellow roosters were evaluated. Thirty roosters (25 days) of similar weight were randomly divided equally into the experimental (capons, n = 15) and control (intact males, n = 15) groups. Caponization was conducted at 28 days of age, and birds were slaughtered at 140 days of age. Capons were significantly heavier (P < 0.05) than intact males and also had longer keel length and chest depth (P < 0.05 or P < 0.01). There were no significant differences in the percentage of eviscerated weight with giblet and eviscerated weight between the two groups. However, caponization increased breast muscle yield and decreased leg muscle yield (P < 0.05). The capons exhibited higher lightness values for thigh meat and lower redness values for both breast and thigh meat. Moreover, caponization up-regulated the fatty acid synthase (FAS) mRNA level in the liver, indicating enhanced hepatic lipogenesis, and also up-regulated the lipoprotein lipase (LPL) and peroxisome proliferator-activated receptor γ (PPARγ) mRNA levels in abdominal adipose tissue, which indicates increased lipid deposition and adipocyte differentiation. Therefore, caponization is associated with heavier body weight, higher breast meat yield, and higher abdominal fat percentage in Guang-xi Yellow roosters; the higher abdominal fat percentage may be associated with the increase in the mRNA expression of FAS, LPL, and PPARγ.

show abstract

Improvac immunocastration affects the development of thigh muscles but not pectoral muscles in male chickens

et al. 2020

View full text Add to dashboard Cite

Improvac has been tentatively used to immune-castrate roosters. The aim of this study was to investigate whether Improvac affected skeletal muscle development in chickens. The muscle fiber type and size and the expression levels of genes related to muscle development in pectoral and thigh muscles were examined at 5, 9, and 14 wk of age in the control, early, late, and early + late Improvac-treated groups. Immunocastration with Improvac affected the development of thigh muscles and the expression of MYH1B , MSTN, and SM . The cross-sectional area in the early group was significantly larger than in the control group at the 14th week ( P < 0.01). At the fifth week, the expression levels of MYH1B , MYOD, and MSTN in the early group were significantly higher than those in the control group ( P < 0.05), and at the ninth week, the expression level of SM1 in the control group was significantly lower than that in early and late groups ( P < 0.05). Immunocastration did not affect pectoral muscle development or the expression of genes related to muscle development.

show abstract

Effects of caponization on growth performance, carcass composition and meat quality of males of a layer line

Cited by 38 publications

References 23 publications

Effect of caponisation on physicochemical and sensory characteristics of chickens

Effect of caponisation on physicochemical and sensory characteristics of chickens

Effects of caponization on growth, carcass, and meat characteristics and the mRNA expression of genes related to lipid metabolism in roosters of a Chinese indigenous breed

Improvac immunocastration affects the development of thigh muscles but not pectoral muscles in male chickens

Contact Info

Product

Resources

About