نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه رازی کرمانشاه- دانشکده علوم و مهندسی کشاورزی- گروه علوم دامی

2 دانشگاه رازی کرمانشاه - دانشکده کشاورزی - گروه علوم دامی

چکیده

اثر اخته کردن بر ترکیب بافتی ناحیه ران و ویژگی­های کیفی گوشت در عضله بایسپس فموریس بزغاله­های نر نژاد مرخز در قالب یک طرح کاملاً تصادفی شامل دو تیمار و چهار تکرار بررسی شد. بدین منظور 16 رأس بزغاله نر نژاد مرخز به مدت 119 روز با جیره آزمایشی تغذیه شد و اخته کردن بزغاله­ها در تیمار مربوطه یک هفته قبل از آغاز دوره سازگاری انجام گرفت. نتایج نشان داد که شاخص عضلانی بودن ناحیه ران در بزغاله­های گروه کنترل بیش از گروه اخته شده بود (05/0P<). درصد رطوبت در گوشت بزغاله­های اخته شده کمتر و درصد چربی بیشتر از بزغاله­های اخته نشده بود (05/0P<). در عضله بایسپس فموریس بزغاله­های اخته درصد اسید پالمیتیک بیشتر و درصد مجموع اسیدهای چرب مطلوب و نسبت (C18:0+C18:1)/C16:0 کمتر از بزغاله­های اخته نشده بود (05/0P<). نتایج تحقیق نشان داد که اخته کردن بزغاله­های مرخز برای مصرف گوشت آن توسط انسان، از نظر مقدار و ترکیب اسیدهای چرب، قابل توجیه نیست.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of castration on meat quality attributes in the Biceps femoris muscle of male Morkhoz goat kids

نویسنده [English]

  • Reza Naseri Harsini 1

1 Young Researchers and Elite Club ,Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

2

چکیده [English]

Effects of castration of male Morkhoz kids on quality characteristics of biceps femoris muscle and tissues composition of thigh were studied based on a completely randomized design (2 treatments and 4 replicates). Sixteen males were fed for 119 days and kids in the second treatment were castrated one week prior to the adaptation period. Results showed that muscularity in the femur region was significantly higher in the control (intact) group (P<0.05). Morkhoz kids castration decreased moisture and increased fat percentages (P<0.05). Castration significantly increased palmitic acid percentage and declined total desirable fatty acids percentage and (C18:0+C18:1)/C16:0 ratio in intramuscular fat of the biceps femoris muscle (P<0.05). Results showed that Morkhoz kids castration, with respect to the amount and composition of fatty acids, wouldn’t be compatible with human health.

کلیدواژه‌ها [English]

  • castration
  • chemical composition
  • Fatty acid composition
  • Femur components
  • Physical attributes
AOAC (2003) Official methods of analysis (pp. 931–932). (15th ed.). Arlington, VA: Association of Official Analytical Chemists.
2. Baik M, Jeong JY, Vu TT, Piao MY and Kang HJ (2014) Effects of castration on the adiposity and expression of lipid metabolism genes in various fat depots of Korean cattle. Livestock Science 24(2):278-287.
3. Beriain MJ, Horcada A, Purroy A, Lizaso G, Chasco J and Mendizabal JA (2000) Characteristics of Lacha and Rasa Aragonesa lambs slaughtered at three live weights. Journal of Animal Science 78:3070–3077.
4. Bickel PE, Tansey JT and Welte MA (2009) PAT proteins, an ancient family of lipid droplet proteins that regulate cellular lipid stores. Biochimistry Biophysic Acta 6:419–440.
5. Bong JJ, Jeong JY, Rajasekar P, Cho YM, Kwon EG, Kim HC, Paek BH and Baik M (2012) Differential expression of genes associated with lipid metabolism in longissimus dorsi of Korean bulls and steers. Meat Science 91:284–293.
6. Bonvillani A, Peña F, Domenech V, Polvillo O, García PT and Casal JJ (2010) Meat quality of Criollo Cordobes goat kids produced under extensive feeding conditions. Effects of sex and age/weight at slaughter. Spanish Journal of Agricultural Research 8(1):116-125.
7. Johnson PL, Purchas RW, McEwan JC and Blair HT (2005) Carcass composition and meat quality differences between pasture-reared ewe and ram lambs. Meat Science 71:383–391.
8. Marti S, Realini CE, Bach A, Pérez-Juan M and Devant M (2013) Effect of castration and slaughter age on performance, carcass, and meat quality traits of Holstein calves fed a high-concentrate diet. Journal of Animal Science 91:1129-1140.
9. Metcalfe L and Schmitz A (1961) The rapid preparation of fatty acid esters for gas chromatographic analysis. Analytical Chemistry 33:363–364.
10. NRC (2007) Nutrient requirements of small ruminants: sheep, goats, cervids, and New World camelids. National Academy Press.
11. Phonmun T (2012) Effects of castration and supplementation of Pueraria mirifica on growth performance carcass quality and odorant fatty acids in goat meat. PhD Thesis. Suranaree University of Technology.
12. Ruvuna F, Taylor J, Okeyo M, Wanyoike M and Ahuya C (1992) Effects of breed and castration on slaughter weight and carcass composition of goats. Small Ruminant Research 7(2):175-183.
13. Santos-Filho JM, Morais SM, Rondina D, Beserra FJ, Neiva JNM and Magalhães EF (2005) Effect of cashew nut supplemented diet, castration, and time of storage on fatty acid composition and cholesterol content of goat meat. Small Ruminant Research. 57(1):51-56.
14. SAS Institute (2004) STAT user's guide: Statistics. Version 9.1. Cary, NC: Statistical Analysis System Institute, Inc.
15. Solaiman S, Kerth C, Willian K, Min BR, Shoemaker C, Jones W and Bransby D (2011) Growth Performance, Carcass Characteristics and Meat Quality of Boer-Cross Wether and Buck Goats Grazing Marshall Ryegrass. Asian-Australian Journal of Animal Science 24(3):351 – 357.
16. Van Soest PJ, Robertson JB and Lewis BA (1991) Methods for dietary fiber, neutral detergent fiber and nonstarch polysaccharides in relation to animal nutrition. Journal of Dairy Science 74:3583–3597.
17. Werdi Pratiwi NM, Murray PJ and Taylor DG (2004) Meat quality of entire and castrated male Boer goats raised under Australian conditions and slaughtered at different weights: physical characteristics, shear force values and eating quality. Animal Science 79:213–219.
18. Yang CC, Deng SJ, Hsu CC, Liu BH, Lin EC, Cheng WT, Wang PH and Ding ST (2010) Visfatin regulates genes related to lipid metabolism in porcine adipocytes. Journal of Animal Science 88:3233–3241.