کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2073166 1079037 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Factors influencing embryo transfer success in alpacas—A retrospective study
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Factors influencing embryo transfer success in alpacas—A retrospective study
چکیده انگلیسی

Embryo transfer offers great advantages to South American camelid farmers to reach their breeding goals but the technology still plays a relatively minor role in comparison to other domestic farm animals like cattle. The aim of the present study was to analyse a data set of 5547 single or multiple ovulation embryo transfers performed in commercial alpaca farms in Australia to determine the factors that influence number and quality of embryos produced, embryo transfer success (percentage of crias born) and gestation length following transfer. Logistic binary regression identified the variables day of flushing after mating, embryo diameter, embryo quality, day of transfer after GnRH, and the age of the recipient to have significant impact on the outcome measure embryo transfer success. Transfer of smaller embryos or lower quality embryos resulted in decreased transfer success rates. Optimal days for obtaining embryos from donors were Days 8 and 9 after mating, optimal days for transfer into recipients were Days 7 and 8 after GnRH treatment. Age (>15 years) and body condition of recipients <2 also lowered transfer success rates, while the summer heat had no adverse impact. However, season did influence gestation length, while cria gender did not. In conclusion, results from the analysis of this very large dataset can underpin new recommendations to improve embryo transfer success in alpacas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Reproduction Science - Volume 136, Issue 3, 10 January 2013, Pages 194–204
نویسندگان
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