کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10893140 1082180 2014 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hormone-induced luteolysis on physiologically persisting corpora lutea in Eurasian and Iberian lynx (Lynx lynx and Lynx pardinus)
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Hormone-induced luteolysis on physiologically persisting corpora lutea in Eurasian and Iberian lynx (Lynx lynx and Lynx pardinus)
چکیده انگلیسی
The Iberian lynx (Lynx pardinus) is the most critically endangered felid. A high reproductive success within the Iberian Lynx Conservation Breeding Program is crucial to maintaining the goal of reintroducing captive born offspring to the wild and thus increasing the population. Lynx follow a unique reproductive strategy with a monoestrous cycle and persisting CLs over many years. These persistent CLs constantly produce progesterone (on average 5 ng/mL) and are hypothesized to hinder a polyestrous cyclicity in lynx. The aim of this study was to evaluate whether artificial luteolysis can be achieved with common luteolytic drugs and if luteolysis would induce a second estrus naturally. We observed a functional regression of lynx CLs after artificial luteolysis with 2.5 μg/kg body weight PGF2α analogue (cloprostenol) administered three times every 16 hours. We could see a similar effect when combining cloprostenol with other drugs like an anti-gestagen (aglepristone) or a dopamin-agonist (prolactin-inhibitor, cabergolin) or by prolonging the cloprostenol administration to a total of 5 days. However, the sample size was too small to draw conclusions about which protocol is superior or if combining different drugs would result in a positive synergism. Neither structural regression of CLs nor subsequent spontaneous estrus induction was induced with any of these treatments. We suggest that a dose of 2.5 μg/kg body weight cloprostenol administered once daily over 3 to 5 days is sufficient for functional luteolysis in lynx. The next step would be to compare the success of estrus induction with or without the preceding artificial luteolysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theriogenology - Volume 82, Issue 4, 1 September 2014, Pages 557-562
نویسندگان
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