Effect of age and body weight on carcass traits and meat composition of rabbits

Metzger, S.; Odermatt, M.; Szabó, András; Radnai, I.; Bíró-Németh, E.; Nagy, István; Szendrő, Zsolt

doi:10.5194/aab-54-406-2011

Cited by 13 publications

(15 citation statements)

References 6 publications

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“…As predicted, the fat content in 35-day-old rabbits (1.25%) was lower (p < .05) than that in 105-day-old rabbits (1.76%). This is consistent with the findings by Metzger et al (2011), in which the moisture and fat content in rabbit meat was found to be influenced by age. Furthermore, ash content of the meat was significantly influenced by the age (p < .05), but not the breed (p > .05).…”

Section: Proximate Compositionsupporting

confidence: 93%

Shotgun proteomic analysis of protein profile changes in female rabbit meat: the effect of breed and age

et al. 2019

Italian Journal of Animal Science

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To determine the protein profile of rabbit meat, the protein composition in meat of rabbits with different breeds and ages was investigated. In this article, M. Longissimus thoracis et lumborum (LTL) samples were obtained from six groups (ten rabbits in each group) of 60 female rabbits (Ira and Sichuan white; 35, 70, and 105 days old). Their nutritional characteristics, amino acid profile, protein quantity, and protein profile were analysed. The results showed that rabbit meat contained high content of essential amino acids, especially for Lys (2.26%). The analysis of amino acid profile in rabbit meat indicated that it varied significantly with rabbit breeds and ages. The proportion of stromal protein to total protein in rabbit meat was significantly influenced by age (p < .05), and the mean proportions of sarcoplasmic, myofibrillar, and stromal protein to total protein in rabbit meat were 32.57%, 57.20% and 10.23%, respectively. A total of 835 proteins were identified from the samples using shotgun proteomics. These proteins were mainly involved in energy metabolism, material transport and biochemical reactions, and the highest number of proteins was observed in meat of 35-day-old rabbit (p < .05). Although breed had a limited influence on the number of proteins in rabbit meat (p > .05), 69 and 35 unique proteins were identified in Ira and Sichuan white, respectively. In conclusion, both breed and age can affect the protein profile of rabbit meat, and the difference in protein profile may be the reason for the quality variation of different rabbit meat samples. HIGHLIGHTS Comparing the differences between two rabbit breeds from the perspective of proteome. Elucidate proteome in rabbit muscle during its growth. The outcome means that a total of 835 proteins were identified from the samples using shotgun proteomics, and the highest number of unique proteins was observed in meat of 35-day-old rabbit.

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Section: Proximate Compositionsupporting

confidence: 93%

Shotgun proteomic analysis of protein profile changes in female rabbit meat: the effect of breed and age

et al. 2019

Italian Journal of Animal Science

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“…Similar effect of age on the moisture and fat content of meat rabbit was reported previously by Metzger et al. (2011) and Li et al. (2019b).…”

Section: Resultssupporting

confidence: 89%

Dielectric properties of fresh rabbit meat in the microwave range

Gómez‐Salazar

Alvarado-Iglesias

Kaur

et al. 2021

Journal of Food Science

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Dielectric properties (DPs) of fresh rabbit meat in the microwave range (0.5 to 20 GHz) were determined. Three different muscles (Biceps femoris, Tensor fasciae latae, and Longissimus thoracis) from California rabbits (male and female) were measured with the open‐ended coaxial probe method at temperatures of 20, 40, and 60 °C. To assess the possible effect of age, females of 100 and 180 days old were analyzed. DPs were affected by frequency, muscle type, age, gender, and temperature (p < 0.05). Dielectric constant decreased with increasing frequency. Loss factor decreased from 0.5 to 2.5 GHz due to ionic conduction, followed by an increase up to 20 GHz, dominated by dipolar relaxation. Practical Application These results are key parameters for further quality sensing applications and for heating processes of meat rabbit using microwaves. Longer penetration depths were achieved at 915 MHz; this frequency is recommended for further applications. Besides, dielectric properties have potential to be a tool for identification of gender and age for slaughtered rabbits.

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“…Slow-growing ISA Dual chickens were characterized by the higher contents of dry matter and crude protein and lower contents of ether extract and cholesterol compared to those in medium-growing JA757 and fast-growing Ross chickens. The protein content results are probably related to the slaughter age, because the protein content increases concomitantly to an increase in the age of animals (Fanatico et al 2007;Metzger et al 2011;Mosca et al 2016).…”

Section: Resultsmentioning

confidence: 99%

The response of fast-, medium- and slow-growing chickens to a low protein diet

Chodová¹,

Tůmová²,

Ketta³

2021

CZECH J ANIM SCI

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The aim of the present study was to evaluate the effect of two dietary protein levels on performance, carcass characteristics, and meat quality parameters in fast- (Ross 308), medium- (JA757), and slow-growing (ISA Dual) chickens to assess the interaction of the two factors. Each genotype was divided into a control group fed a commercial type of feed mixture and an experimental group fed a low-protein diet (LP). The trial was terminated after a common period of fattening of each genotype, and 20 chickens per group (sex ratio 1 : 1) were selected for the carcass and meat analysis. The results indicated that the LP diet decreased growth (P < 0.001) and increased feed consumption (P < 0.001) more in the fast-growing than in the slow-growing genotypes; however, reduced mortality was detected in fast-growing chickens. The LP diet had a negative effect on the European performance efficiency factor (P < 0.001) in fast- (–10%) and medium-growing (–6%) but not in slow-growing chickens. The main effect of the genotype on the carcass characteristics included the highest (P < 0.001) dressing out and breast percentage in fast-growing chickens and the highest (P < 0.001) percentage of thigh and abdominal fat in the slow-growing genotype. The LP diet had only a minor effect on the carcass traits. Regarding meat quality characteristics, slow-growing chickens were characterized by higher contents of dry matter (P < 0.001) and crude protein (P < 0.001) and lower contents of ether extract (P < 0.001) and cholesterol (P < 0.001) compared to medium- and fast-growing chickens. The individual effects of the genotypes were manifested by the largest cross-sectional area of the muscle fibres of pectoralis major in fast-growing chickens (P < 0.001). The results of the present study indicate a significant interaction of the dietary protein levels and genotypes in growth performance and a negligible effect on the carcass composition and physical and chemical quality of meat

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Effect of age and body weight on carcass traits and meat composition of rabbits

Cited by 13 publications

References 6 publications

Shotgun proteomic analysis of protein profile changes in female rabbit meat: the effect of breed and age

Shotgun proteomic analysis of protein profile changes in female rabbit meat: the effect of breed and age

Dielectric properties of fresh rabbit meat in the microwave range

The response of fast-, medium- and slow-growing chickens to a low protein diet

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