کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8426265 | 1546050 | 2018 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Embryonic and fetal development of the white-lipped peccary (Tayassu pecari)
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Embryonic and fetal development of the white-lipped peccary (Tayassu pecari) Embryonic and fetal development of the white-lipped peccary (Tayassu pecari)](/preview/png/8426265.png)
چکیده انگلیسی
The white-lipped peccary (Tayassu pecari) is an endangered large-sized Neotropical ungulate that is one of the most hunted mammals in the Amazon. Here, we used two embryos and 102 white-lipped peccary fetuses originated from animals hunted for subsistence in the Peruvian and Brazilian Amazon to describe the intrauterine development of external and internal morphology of this Neotropical ungulate. Logistic regressions were used to estimate the probability of occurrence of main external characteristics in relation to the total dorsal length (TDL), while multiple linear and non-linear regressions were conducted to assess the relationship between external and visceral biometry with TDL. External characteristics appeared in the following chronological order: limbs, differentiated genitalia and opened eyelids (â¥5.1â¯cm TDL), fused eyelids (â¥6.2â¯cm TDL), hooves and outer ear (â¥7.9â¯cm TDL), dorsal gland (â¥9.4â¯cm TDL), skin (â¥11.5â¯cm TDL); tactile pelage (â¥13.8â¯cm TDL), covering pelage (â¥20.9â¯cm TDL), tooth eruption (â¥26.4â¯cm TDL) and opened eyelids (â¥27.8â¯cm TDL). The formula of fetal age was âWâ¯=â¯0.084 (t - 31.80), with a high linear relationship between TDL and gestational age. All external biometric parameters and absolute volume of visceral organs showed strong positive relationship with TDL. Except for the liver, we found differences in the relative volume of most visceral organs between advanced fetuses (â¥34.2â¯cm TDL) and adults. The most important events during the intrauterine development in the white-lipped peccary show that, in contrast with the domestic pig, it is a highly precocial species producing newborns with a high fetal growth velocity which allows newborns to achieve an early autonomous functionality. Our results are relevant to improve imaging techniques and assist the reproductive and clinical management for the white-lipped peccary both in captivity and in the wild.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theriogenology - Volume 119, 1 October 2018, Pages 163-174
Journal: Theriogenology - Volume 119, 1 October 2018, Pages 163-174
نویسندگان
Rafael dos Santos de Andrade, Frederico Ozanan Barros Monteiro, Hani Rocha El Bizri, Luciana Pantoja, Richard Bodmer, João Valsecchi, Pedro Mayor,