Cetin Y, Sagcan S, Gungor O, Ozyurtlu N, Uslu B A
Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, University of Mehmet Ekif Ersoy, Burdur, Turkey.
Reprod Domest Anim. 2009 Aug;44(4):659-62. doi: 10.1111/j.1439-0531.2007.01043.x. Epub 2008 Dec 23.
The objective of this study was to compare the efficiency of oestrus induction protocols on Kilis dairy goats kept on a goat farm situated close to Kilis, Turkey. Eighty goats were assigned randomly into four groups of 20 animals each in a factorial arrangement: (i) untreated control (CON), (ii) melatonin implant (MEL), (iii) CIDR-G (CIDR) and (iv) melatonin implant plus CIDR-G (MC). Experiments were performed in mid-anoestrus season under natural photoperiod environment. The differences among treatment groups in oestrus response were significant. Oestrus response was higher in the MC group than in other groups (p < 0.05). A significant difference was observed in the time interval from cessation of treatment to the onset of oestrus among treatments. The CIDR-G treatment reduced intervals from buck introduction to oestrus. The time to onset of oestrus in both the MC and CIDR groups was significantly shorter, compared with the MEL and CON groups (p < 0.05). The number of does kidding and fertility were not different among treatment groups (p > 0.05). Fecundity was similar among goats in all groups. Prolificacy and twining rates showed similar trends as fecundity rates, with no differences (p > 0.05) between treatments. The results of this study showed that oestrus in Kilis does can be effectively induced by using melatonin and CIDR combined treatment, and fertility will not be adversely affected. However, this treatment did not improve fecundity, prolificacy and twining rates.
本研究的目的是比较在土耳其基利斯附近的一个山羊养殖场饲养的基利斯奶山羊上，不同发情诱导方案的效率。80只山羊被随机分为四组，每组20只，采用析因设计：（i）未处理对照组（CON），（ii）褪黑素植入组（MEL），（iii）阴道孕酮释放装置组（CIDR）和（iv）褪黑素植入加阴道孕酮释放装置组（MC）。实验在自然光照周期环境下的发情中期进行。各处理组在发情反应上的差异显著。MC组的发情反应高于其他组（p<0.05）。各处理在从停止处理到发情开始的时间间隔上观察到显著差异。CIDR处理缩短了从引入公羊到发情的间隔时间。与MEL组和CON组相比，MC组和CIDR组发情开始的时间显著缩短（p<0.05）。各处理组产羔母羊数量和繁殖力无差异（p>0.05）。所有组山羊的繁殖力相似。产仔率和双羔率与繁殖力率呈现相似趋势，各处理间无差异（p>0.05）。本研究结果表明，使用褪黑素和CIDR联合处理可有效诱导基利斯母羊发情，且不会对繁殖力产生不利影响。然而，这种处理并未提高繁殖力、产仔率和双羔率。
