A comparison of tissue development in Pietrain and Large White pigs from birth to 64 kg live weight 2. Growth changes in muscle distribution

Davies, A. S.

doi:10.1017/s0003356100022959

Cited by 49 publications

(32 citation statements)

References 8 publications

(10 reference statements)

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“…Such a response is consistent, however, with the uniform small fiber make-up of this muscle and with observations [7, 171 that this muscle, along with the semitendinosus muscle, represents the major athletic adaptational muscle of the pig, dog and horse. It is larger and capable of further selective enlargement in the greyhound and the thoroughbred in training compared with their less athletic counterparts, and it also is large in the Pietran pig [8,9]. Stockmen long have used palpation of the longissimus area to determine the condition of sheep, and they are aware that only animals in good condition have an adequately filled space lateral to the vertebral spines.…”

Section: Discussionmentioning

confidence: 99%

Histochemical and Morphometric Evaluation of Skeletal Muscle of Cachectic Sheep

Hulland

1981

Vet Pathol

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Abstract. Skeletal muscle of sheep was examined histochemically in an attempt to define muscle fiber populations capable of distinctive biological behavior. ATPase at alkaline and acid pH, NADH-TR, and succinic dehydrogenase showed at least 12 fiber types, but only three often enough to be considered biologically important muscle fiber populations. The proportions of the three major types altered during early life, but not perceptibly during adult life. Proportions of Type I and Type I1 fibers were different, sometimes significantly, from breed to breed.Histochemical techniques and morphometric analyses of fiber cross-sectional area were used to study muscle fiber changes in moderate to marked cachectic atrophy. Progressive reduction of gross muscle volume was attended by complex interrelationships between the two major muscle fiber types, including alternate episodes of atrophy and hypertrophy, resulting in marked inequality of mean fiber size between the fiber types. The patterns appeared to be different but characteristic for each muscle. The usual pattern of cachectic atrophy shows atrophy resistance of Type I fibers, but here a Type 11-dominant atrophy also was seen. It is concluded that the large muscle fibers often seen in advanced cachectic atrophy are those Type I fibers that are more labile in both atrophy and hypertrophy than most.

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Section: Discussionmentioning

confidence: 99%

Histochemical and Morphometric Evaluation of Skeletal Muscle of Cachectic Sheep

Hulland

1981

Vet Pathol

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“…There is little similar work in swine: Richmond & Berg (1971a, 6, 1972 investigated tissue distribution in Yorkshire, Hampshire x Yorkshire and Duroc Jersey x Yorkshire pigs and found little variation. On the other hand Dumont, Schmitt & Roy (1969) and Davies (19746) reported several differences in muscle proportions between the Pietrain and the Large White breeds. As this information seems inconclusive we surveyed the tissue distribution of three widespread breeds: Landrace, Hampshire and Duroc Jersey.…”

Section: Introductionmentioning

confidence: 97%

A comparison of tissue weight distribution in Landrace, Hampshire and Duroc Jersey pigs

Goenaga¹,

Carden²

1979

J. Agric. Sci.

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The carcasses of 20 Landrace, 20 Hampshire and 20 Duroc Jersey barrows were dissected in order to study the influence of the breed on tissue weight distribution.After weaning, at 56 days of age, the animals were allocated to individual pens and fed a standard diet containing 18 % crude protein and 13 MJ ME/kg, until they reached their designated slaughter weight.The Landrace and Hampshire pigs were slaughtered between 60 and 115 kg and the Duroc Jersey ones between 40 and 115 kg live weight. The right half carcasses were completely dissected using strictly anatomical criteria. Individual muscles were classified into eight anatomical groups (Carden & Goenaga, 1977).The results were examined by covariance analyses utilizing the allometric equation. Carcass tissue composition was studied using the weight of the dissected side as covariate. When muscle: bone ratio was examined, the weight of total side muscle was used as the independent variable. The growth of different parts of a tissue relative to the corresponding whole tissue was studied.Concerning carcass composition, there were significant breed differences in muscle and fat contents and in the muscle:bone ratio.Breed differences were found in muscle distribution. The 6 values of muscle groups 1 (proximal hind limb), 2 (distal hind limb), 6 (distal forelimb) and 7 (muscles connecting forelimb to thorax) were statistically different as were the adjusted means of groups 3 (spinal column), 5 (proximal forelimb) and 8 (muscles connecting forelimb to neck and intrinsic muscles of neck and thorax).Significant differences 'were also found in bone weight distribution. Slope values of the tarsals, os coxae, scapula and sternum were statistically different. Adjusted means of tibia-fibula, sacrum, spinal column, radius-ulna, carpals and ribs were also significantly different.Finally, there were breed effects in the distribution of fat, the relative weight of subcutaneous and of intermuscular fat being statistically different.

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“…Power function has been widely used in studies of relative growth of one part to another or the whole. In domestic animals, relative growth has been studied in relation to meat production for cattle [17], sheep [8,11,14], and pigs [5][6][7]. In laboratory animals, pelvic sexual dimorphism was investigated for the rabbit [13,15], rat [1], and mouse [2].…”

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confidence: 99%