Effect of Feeding Systems, Slaughter Weight and Sex on Histological Properties of Lamb Carcasses

Moody, W. G.; Kemp, James D.; Mahyuddin, M.; Johnston, David; Ely, D. G.

doi:10.2527/jas1980.502249x

Cited by 44 publications

(28 citation statements)

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“…This finding is consistent with the differences observed in the proportions of the different fiber types. It is also in agreement with the well-documented observation that the muscles of bulls are redder than those of steers (Seideman and Crouse, 1986 Moody et al, 1980;and Solomon and Lynch, 1988, in sheep;and Seideman and Crouse, 1986, in cattle). These changes are commonly explained as a consequence of the hypothyroidism that occurs during a period of undernutrition (Beverly et al, 1991 It is known that thyroid hormones regulate the expression of type IIB myosin isoform (MHC2b) (Bacou and Vigneron, 1988).…”

Section: Effects Of Castrationsupporting

confidence: 91%

Influence of castration and postnatal energy restriction on the contractile and metabolic characteristics of bovine muscle

Picard¹,

Robelin²,

Geay³

1995

Ann. Zootech.

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Section: Effects Of Castrationsupporting

confidence: 91%

Influence of castration and postnatal energy restriction on the contractile and metabolic characteristics of bovine muscle

Picard¹,

Robelin²,

Geay³

1995

Ann. Zootech.

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“…Some studies (Ashmore et al 1972;Suzuki et al 1988) suggest that in sheep the percentage and distribution of the different types of fibres, classified by means of the m-ATPase technique, are genetically determined in the semitendinosus, triceps brachii and abdominal cutaneous muscles. However, the percentage of the m-ATPase fibre types changed after birth in the quadriceps muscle (White et al 1978) and in the longissimus muscle (Moody et al 1980). Velotto et al (2005) studied the distribution of the three fibre types in two muscles of the Gentile of Puglia (caput longum m. tricipitis brachii and m. psoas major) and confirmed the high percentage of FOG fibres in both muscles considered.…”

Section: Discussionmentioning

confidence: 99%

Effect of Age and Sex on Histomorphometrical Characteristics of Two Muscles of Laticauda Lambs

et al. 2010

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The aim of the present experiment was to determine the effect of sex and age on histochemical and morphometric characteristics of muscle fibres (myocytes) in lambs born by single, twin, triplet and quadruplet birth.Thirty lambs were slaughtered at 60 days of age; thirty were weaned at 60 days and fed until 120 days with flakes (60%) and food supplements, and then slaughtered. Muscle tissues were obtained from two muscles, namely m. semitendinosus and m. longissimus dorsi of all lambs. For each fibre type, area perimeter and diameter (maximum and minimum) were measured and slow-twitch oxidative fibres, fast-twitch glycolytic fibres, fast-twitch oxidative-glycolytic fibres were histochemically differentiated. The muscles were stained for myosin ATPase, and succinic dehydrogenase. At 60 days, females had fibres larger than males, whereas the opposite was observed at 120 days. Besides, at 60 days, the lambs born by single birth had fibres larger than those born by multiple birth, whereas the opposite was observed at 120 days. Single lambs were heavier than twin lambs and multiple lambs. Fast-twitch glycolytic fibres had the largest size, followed by slow-twitch oxidative and fast-twitch oxidative glycolytic fibres. The dimensions of fibre types in m. longissimus dorsi were larger than in m. semitendinosus (P < 0.001).These muscle fibre characteristics are thought to be important factors influencing meat quality, which is often related to metabolic and contractile properties as determined by the muscle fibre type distribution. Birth type, postnatal development, lamb, histochemistry, nutrition, muscle fibresThe Laticauda originated probably from the Northern African sheep, Berbera or Barbaresca, and it got the present characteristics thanks to subsequent crossbreeds with the sheep from the Apennines, the typical one from Southern Italy. Particularly, Laticauda is bred in the country of Benevento and Avellino and during the last years the head number has increased. This breed is traditionally reared in hilly farm pasture predominantly in sedentary breeding groups and the most common farming system is the "family farm type". Laticauda is a dual-purpose breed with the ability to produce good amount of milk and meat. Meat quality is affected by numerous factors including the growth stage and differentiation of skeletal muscle fibre types. The physiological differentiation of muscle fibres is a dynamic equilibrium which can vary during growth or as a response to the muscle work rate. Guth and Yellin (1971) noticed that muscle fibres continuously change during the animal's life as a functional demand adaptation and that the fibre type only reflects the fibre constitution at a certain moment. Henkel (1991) suggested muscle histochemistry as a tool for quantifying the effect of different treatments on the size of muscle fibres. In this study we have defined the skeletal muscle fibre populations of lambs by using different methods of m-ATPase and we have analyzed the postnatal development of these fibre populations bet...

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“…Johnston et al (1981) reported that, in general, as the energy level in the diet increased, the percentage of intermediate fibers decreased and the percentage of white fibers increased. Moody et al (1980) postulated that the available source of energy in lamb rations appeared to cause a physiological shift from intermediate fibers to white fibers. These references refer to work on castrated or female animals.…”

Section: Resultsmentioning

confidence: 99%

“…Rompala and Jones (1984) observed that the energy density of the diet and length of time fed affected the solubility of collagen in muscle. Moody et al (1980) postulated that the available source of energy in lamb diets appeared 1824 J. Anim. Sci.…”

mentioning

confidence: 99%

The Effects of Rate of Change in Body Weight on Tissue Development and Meat Quality of Youthful Bulls

Crouse¹,

Calkins²,

Seideman³

1986

Journal of Animal Science

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Effect of Feeding Systems, Slaughter Weight and Sex on Histological Properties of Lamb Carcasses

Cited by 44 publications

References 0 publications

Influence of castration and postnatal energy restriction on the contractile and metabolic characteristics of bovine muscle

Influence of castration and postnatal energy restriction on the contractile and metabolic characteristics of bovine muscle

Effect of Age and Sex on Histomorphometrical Characteristics of Two Muscles of Laticauda Lambs

The Effects of Rate of Change in Body Weight on Tissue Development and Meat Quality of Youthful Bulls

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