Breed and sex differences in fat distribution and mobilization in growing pigs fed at maintenance
Breed and sex differences in fat distribution and mobilization in growing pigs fed at maintenance
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DOI：
10.1016/s0301-6226(96)01001-9
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发表时间：
1996-12-01
期刊：
影响因子：
--
通讯作者：
Vangen, O
中科院分区：
文献类型：
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作者：
Kolstad, K;Jopson, NB;Vangen, O
为了研究维持饲养期间生长猪脂肪分布和脂肪动员的品种和性别差异，对挪威长白猪和加拿大杜洛克猪进行了比较。在为期8周的维持喂养期间，总共喂养了92只动物，以保持约58公斤的恒定体重。计算机断层扫描用于测量第0周、第4周和第8周的身体成分。维持饲喂期开始时，长白猪体内脂肪含量（2.58 vs 2.20 kg）高于杜洛克猪，肌间/肌内脂肪含量（1.90 vs 2.26 kg）低于杜洛克猪（p < 0.01）。去势母猪肌内脂肪含量（2.15比2.01 kg）高于后备母猪（5.30比5.58 kg），皮下脂肪含量（p < 0.01）低于后备母猪（p < 0.01）。将饲料限制在维持水平，脂肪被动员起来。无论品种还是性别，皮下脂肪和肌间/肌内脂肪的调动比例都高于体内脂肪（p < 0.001）。皮下脂肪和肌间/肌内脂肪的相关性（0.61-0.90）高于皮下脂肪和肌内脂肪的相关性（0.26-0.70）。讨论了造成品种和性别脂肪分布差异的原因，以及养护期内脂肪库利用率差异的原因。
To study breed and sex differences in fat distribution and fat mobilization in growing pigs during maintenance feeding, pigs of Norwegian Landrace and Duroc of Canadian origin were compared. A total of 92 animals were fed to maintain constant body weight of around 58 kg over an eight weeks period of maintenance feeding. Computed tomography was used for measuring body composition at weeks zero, four and eight. Landrace pigs contained more internal fat (2.58 versus 2.20 kg) and less inter/intramuscular fat (1.90 versus 2.26 kg) at start of the maintenance feeding period than the Duroc pigs (p < 0.01). Castrates contained more inter/intramuscular fat (2.15 versus 2.01 kg) and less subcutaneous fat (5.30 versus 5.58 kg) than gilts (p < 0.01). Fat was mobilized as feed was restricted to maintenance level. A greater proportion of fat from subcutaneous and inter/intramuscular fat depots was mobilized compared to internal fat in both breeds and sexes (p < 0.001). Correlations between subcutaneous and inter/intramuscular fat were higher (0.61-0.90) than those between these depots and internal fat depots (0.26-0.70). Reasons for breed and sex differences in fat distribution, and differences in availability between the fat depots during the maintenance period are discussed.