پیوندهای مفید
اخبار و اعلانات
آمار
| تعداد نشریات | 158 |
| تعداد شماره‌ها | 6,230 |
| تعداد مقالات | 67,764 |
| تعداد مشاهده مقاله | 115,181,770 |
| تعداد دریافت فایل اصل مقاله | 89,929,461 |
اثر مصرف ملاتونین و بروموکریپتین بر وزن بدن و ریزش الیاف در بز رائینی | ||
| تولیدات دامی | ||
| مقاله 10، دوره 17، شماره 1، فروردین 1394، صفحه 95-105 اصل مقاله (649.32 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jap.2015.54023 | ||
| نویسندگان | ||
| اردشیر محیط1؛ مهناز صالحی* 2؛ زینب خوش بخت3 | ||
| 1استادیار گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران | ||
| 2مربی پژوهشی، بخش فرآوری تولیدات دامی، مؤسسۀ تحقیقات علوم دامی کشور، کرج، ایران | ||
| 3دانشجوی دورۀ دکتری گرایش فیزیولوژی دام، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه گیلان، رشت، ایران | ||
| چکیده | ||
| اثر مصرف ملاتونین و بروموکریپتین بر وزن بدن، ریزش الیاف، و خصوصیات کرک با استفاده از 24 رأس بز مادۀ رائینی (دو تا سهساله) در چهار گروه آزمایشی شاهد (C)، ملاتونین (MI)، بروموکریپتین (B)، و ملاتونین+بروموکریپتین (MIB) بررسی شد. در گروه MI، یک قرص 18 میلی‌گرمی ملاتونین در زیر پوست قرار داده شد و 40 روز بعد این عمل تکرار شد. در گروه B، 5/0 میلیگرم بروموکریپتین برای هر کیلوگرم وزن زنده، سه نوبت در هفته تزریق شد. در گروه MIB، ملاتونین و بروموکریپتین با یکدیگر مصرف شد. بزها به‌مدت دو ماه در شرایط طبیعی و با طول دورۀ کوتاه روشنایی (8 ساعت نور و 18 ساعت تاریکی) پرورش داده شدند. الیاف بز با شانۀ چوبی در چهار مرحلۀ زمانی با فاصلۀ دو هفته از 23 بهمن تا 8 فروردین جمع‌آوری شد. وزن الیاف شانه‌شدۀ بزهای گروه C، MI، B، و MIB به‌ترتیب 3/21، 3/23، 7/15، و 0/17 گرم بود (05/0P>). میانگین قطر کرک در بزهای گروه MI (4/21 میکرون) بیش از تیمارهای C، B، و MIB به‌ترتیب 2/20، 9/19، و 8/19 میکرون بود (01/0P<). ضریب تغییرات قطر کرک بیدۀ بزهای گروه شاهد بیش از سایر گروه‌ها بود (05/0P<). نتایج نشان داد که ملاتونین و برموکریپتین موجب افزایش یکنواختی قطر الیاف کرک در بزهای مادۀ رائینی میشود. | ||
| کلیدواژه‌ها | ||
| الیاف شانه‌شده؛ درصد کرک؛ ضریب تغییرات قطر؛ طول؛ قطر | ||
| عنوان مقاله [English] | ||
| The effect of melatonin and bromocryptine administration on body weight and shedding fibre of Raeini goats | ||
| نویسندگان [English] | ||
| Ardeshir Mohit1؛ Mahnaz Salehi2؛ Zeynab Khob Bakhat3 | ||
| 1Assistant Professor, Department of Animal Science, Faculty of Agricultural, Guilan University, Rasht, Iran | ||
| 2Instructor, Department of Animal Product, Animal Science Research Institute, Karaj, Alborz, Iran | ||
| 3Ph.D. Candidate, Department of Animal Science, Faculty of Agricultural, Guilan University, Rasht, Iran | ||
| چکیده [English] | ||
| The effect of melatonin and bromocryptine on body weight, fibre shedding and cashmere traits was investigated by using 24 Raeini female goats (2-3 years old) in four experimental groups: control (C); melatonin (MI) implant (18 mg at first and repeated after 40 days), bromocryptine (B) injection, (0.5 mg/kg BW per three days) melatonin and bromocryptine implant and injection (MIB). All goats were maintained under natural photoperiodic conditioned of short day photoperiod (8 h light and 18 h dark), for two months. Fibre was harvested by using wooden combs and each goat was combed four times at two week intervals, from 23th February to 8th March. Combed fibers were 23.3, 15.7, 17.0 and 21.3 percent for MI, B and MIB treated and C groups. Cashmere fiber diameter (CFD) for MI group (21.4 um) was higher than the other C, B and MIB groups 20.2, 19.9 and 19.8 um (P<0.01). The CV of CFD was significant and higher in C group compared with the other groups (P<0.05). These results suggest that melatonin and bromocryptine improve uniformity of cashmere diameter in Raeini female goats. | ||
| کلیدواژه‌ها [English] | ||
| cashmere percent, combed fiber, CV of diameter, diameter, length | ||
| مراجع | ||
|
1. Abecia JA, Palacin I and Forcada F (2007) The effects of exogenous melatonin on wool quality and thyroid function in Rasa Aragonesa ewes. Spanish Agricultural Research. 5(2): 164-171. 2. American Society for Testing Materials - ASTM (1982) Diameter of wool and other animal fibres by microprogection D2130-78. 32: 498-507. 3. Ansari-Renani HR, Mueller JP, Rischkowsky B, Seyed Momen SM, Alipour O, Ehsani M and Moradi S (2012) Cashmere quality of Raeini goats kept by nomads in Iran. Small Ruminant Research. 104(1-3): 10-16. 4. Braun A (1998) The potential utilization of South African indigenous goats for cashmere production. Proceedings of Workshop: In research and training strategies for goat production systems in South Africa, Hogsback, South Africa. 5. Carl N and Ende V (1993) Repeated measures analysis, growth and other time dependent measures. in: Scheiner MG, Design and Analysis of Ecological Environments. Chapman and Hall. Pp. 113-137. 6. Cong Y, Deng H, Feng Y, Chen Q and Sun Y (2011) Melatonin implantation from winter solstice could extend the cashmere growth phase effectively. Small Ruminant Research. 99(1): 48-53. 7. De Villar JF, McMillen SR, Dicks P and Rhinda SM (2000) The roles of thyroid hormones and prolactin in the control of fibre moult and associated changes in hair follicle activities in cashmere goats. Australian Agriculture Research. 51: 407-414. 8. Dicks P, Russel AJ and Lincoln GA (1996) The localisation and characterisation of insulin-like growth factor-I receptors and the investigation of melatonin receptors on the hair follicles of seasonal and non-seasonal fibre-producing goats. Endocrinology. 151(1): 55-63. 9. FAO (2014) FAOSTAT. Food and Agriculture Organization of the United Nations, Rome. Available at http://faostat.fao.org [verified 20 July. 2014]. 10. Forsyth IA, Deveson SL and Arendt J (1991) The manipulation of breeding season in goats. Advance Pineal Research. 6: 217-223. 11. Gebbie FE, Forsyth IA and Arendt J (1994) Effects of melatonin, bromocriptine and altered light/temperature patterns on coat growth in dairy goats. European Fine Fibre Network Occasional Publicatio. 2: 97-107. 12. Harris PM, Xu ZZ, Blair HT, Dellow DW, McCutcheon SN and Cockrem J (1989) The effect of exogenous melatonin, administered in summer, on wool growth and testis diameter of Romneys. Proceeding of New Zealand Society Animal Production. 49: 35-38. 13. Klören WRL and Norton BW (1995) Melatonin and fleece growth in Australian cashmere goats. Small Ruminant Research. 17(2): 179-185. 14. Koyonch M and Tuncel E (2000) Effect of sex and phenotypic correlation among fiber traits crossbred goats. 7th International Conference Goats. France, 15-21 May. 2: 641-642. 15. Mitchel RJ, Betteridge K, Welch RAS, Gurnsey MP and Nixon AJ (1989) Fibre growth cycle of unselected, reproducing cashmere does discuss in relation to winter shearing. Proceeding of the New Zealand Society of Animal Production. 49: 163-164. 16. Roux JA (2008) Evaluation of cashmere production of the meat producing Boer goat. 10th World Conference on animal production. Cape Town, South Africa, 23-28 November 2008. Pp. 1-2. 17. Santiago-Moreno J, Dolfo Toledano Diaz A, Gomez-Brunet A and Lopez-Sebastian A (2006) Effect of constant-release implants of melatonin on horn growth in Mouflon ram lambs, Ovis gmelini musimon. Folia Zoology. 55(1): 15-18. 18. Seid Moemen SM, Ansari HR, Dayani O, Salehi M and Tokasi MV (2009) The effect of fleece coming on technical traits of cashmere yarns. National Fibre Conference in Years of Natural Fibers. Tabriz University. 19. Teh TH, Jia ZH, Ogden KD and Newton GR (1991) The effects of photoperiod and melatonin implant on cashmere production. Animal Science. 69: 496. 20. Toerien CA, Puchala R, McCann JP, Sahlu T and Goestsch AL (1999) Adrenocortical response to ACTH in angora and Spanish goat weathers. Animal Science. 77: 1558-1564. 21. Welch RAS, Gurnsey MP, Betteridge K and Mitchell RJ (1990) Goat fibre response to melatonin given in spring in two consecutive years. Proceeding of New Zealand Society Animal Production. 50: 146-149. 22. Wuliji T, Litherland A, Goetsch AL, Sahlu T, Puchala R, Dawson LJ and Gipson T (2006) Evaluation of melatonin and bromocryptine administration in Spanish goats: III. Effects on hair follicle activity, density and relationships between follicle characteristics. Small Ruminant Research. 66(1): 11-21. 23. Wuliji T, Litherland A, Goetech AL, Sahlu T, Puchala R, Dawson LJ and Gipson T (2003) Evaluation of melatonin and bromocryptine administration in Spanish goats. I. Effects on the out of season breeding performance in spring, kidding rate and fleece weight of does. Small Ruminant Research. 49: 31-40. 24. Yeastes NTM (1965) Modern aspects of animal production. London. Butterworts. P. 154. 25. Yue C, Sun M, Liu H, Zhang W, Zhu X, Kong X and Jia Z (2012) Expression of deiodinase gene mRNA after melatonin manipulated in cashmere goats skin during cashmere growth. Animal and Veterinary Advances. 11: 1837-1842. | ||
|
آمار تعداد مشاهده مقاله: 1,650 تعداد دریافت فایل اصل مقاله: 714 |
||